- 1: LOG, Site none, Mon 30-Jun-1997 14:08:14 GMT, Logbook created
initial log file /net/sssf1/aster/projects/DEVEL/logbook/tklog.log created by tklog
- 2: Gill_Sonic_Tests, Site , Mon 30-Jun-1997 14:23:17 GMT, Gill cold temp. issues
From: "Gill Electronic R&D"
Subject: Solent HS Anemometer
Date: Fri, 15 Nov 1996 19:02:39 -0000
John
Sorry for the delay in responding further to your email.
The temperature qualification of the HS anemometer has been carried out in
our environmental chamber here at Gill. This operates down to -40°C.
Over the full temperature range we have monitored receive waveforms,
transducer delays, speed of sound, analogue inputs and the inclinometer
readings.
The performance of the transducers is reduced below -35°C. We are
currently performing tests to obtain more data on this.
The test time at low temperatures is currently hours rather than days or
weeks. However, we have not seen any degradation of transducers in other
models that have been operated at low temperatures. This includes a Solent
R2 operated at the Antarctic by Phil Anderson of British Antarctic Survey.
His telephone number is 44 1223 251400.
It is worth noting that the HS and R3 carry out transducer delay correction
with temperature which the R2 does not.
I would expect the power consumption of the HS to remain <4 watts at low
temperatures. We will measure it to confirm this.
Regarding cables, I have a note in my logbook that a cable supplier that I
contacted a while ago does not recommend polyethelene for operation below
-20°C. A plastics book here at Gill gives a glass transition temperature
for polyethelene of -20°C which may support this view.
I hope the above is helpful.
Angus
----------------------------------------------------------------------------
------------------------
Gill Electronic Research & Development
Solent House, Cannon Street, Lymington, HAMPSHIRE. SO41 9BR.
Telephone : +44 (1590) 679955 Fax : +44 (1590) 676409
E-Mail : gill@gill.co.uk Website : http://www.gill.co.uk/index.html
- 3: Gill_Sonic_Tests, Site , Mon 30-Jun-1997 17:49:45 GMT, Tom' s email to Gill / SN's
From horst@stout.atd.ucar.edu Thu Jun 12 12:16 MDT 1997
Date: Thu, 12 Jun 1997 12:16:20 -0600 (MDT)
Subject: Solent cold temperature performance
Dear Mr. Clark:
I spoke to you earlier this morning regarding a question on the
performance of our 1-D Solent for shorter path lengths. Following is
another, more urgent question regarding the performance of Solent
anemometers in cold temperatures.
We are hoping that we can use R2 Solent sonic anemometers for a 13
month field program to study the surface heat budget of the arctic
(SHEBA). We expect average minimum temperatures to reach -30 degC and
extreme lows to approach -50 degC. Could you tell me the expected cold
temperature performance of our R2 sonics? The serial numbers of our
Solents are:
1012R2 0067; 1012R2A 0129; 1012R2A 0087
There is also a fourth R2 Solent for which I do not yet have the serial
number.
I spoke with Phil Anderson of the British Antarctic Survey. He used an
R1 Solent in the Anarctic in 1992 and was quite disappointed in the
performance below -5 degC. Angus Raby provided the attached
information on the R3, but I find in your sales brochure a quoted
performance down to -20 degC on early model R2s and -40 degC on later
model R2s (corresponding storage temperatures are -40 degC and -50
degC).
Could you also tell me the nature of the tests used to establish these
temperature specifications. If our sonics are only rated for performance
to -20 degC, is there a simple upgrade that could be done to improve
their low temperature performance?
We are on an extremely tight schedule to prepare for a field deployment
in September, so I would very much appreciate a quick response.
Best regards,
Tom Horst
>=46rom gill@gill.co.uk Fri Nov 15 12:25 MST 1996
>Message-Id: <199611151907.TAA22638@zeus.tcp.net.uk>
>From: "Gill Electronic R&D"
>To:
>Subject: Solent HS Anemometer
>Date: Fri, 15 Nov 1996 19:02:39 -0000
>
>John
>
>Sorry for the delay in responding further to your email.
>
>The temperature qualification of the HS anemometer has been carried out in
>our environmental chamber here at Gill. This operates down to -40=B0C.
>
>Over the full temperature range we have monitored receive waveforms,
>transducer delays, speed of sound, analogue inputs and the inclinometer
>readings.
>
>The performance of the transducers is reduced below -35=B0C. We are
>currently performing tests to obtain more data on this. =20
>
>The test time at low temperatures is currently hours rather than days or
>weeks. However, we have not seen any degradation of transducers in other
>models that have been operated at low temperatures. This includes a Solent
>R2 operated at the Antarctic by Phil Anderson of British Antarctic Survey.=
>=20
>His telephone number is 44 1223 251400.
>
>It is worth noting that the HS and R3 carry out transducer delay correction
>with temperature which the R2 does not.
>
>I would expect the power consumption of the HS to remain <4 watts at low
>temperatures. We will measure it to confirm this.
>
>Regarding cables, I have a note in my logbook that a cable supplier that I
>contacted a while ago does not recommend polyethelene for operation below
>-20=B0C. A plastics book here at Gill gives a glass transition temperature
>for polyethelene of -20=B0C which may support this view.
>
>I hope the above is helpful.
>
>Angus
>
>---------------------------------------------------------------------------=
>-
>------------------------
>Gill Electronic Research & Development =20
>Solent House, Cannon Street, Lymington, HAMPSHIRE. SO41 9BR.
>Telephone : +44 (1590) 679955 Fax : +44 (1590) 676409
>E-Mail : gill@gill.co.uk Website : http://www.gill.co.uk/index.html
>
>
- 4: Gill_Sonic_Tests, Site , Mon 30-Jun-1997 19:33:25 GMT, Angus email: cold temp. perf. of gills
From angus.raby@virgin.net Thu Jun 19 12:09 MDT 1997
To: horst@stout.atd.ucar.edu
Subject: Solent cold temperature performance and path length
Dear Tom
This is largely in response to your email of 12th June concerning low
temperature performance of the R2.
The results that Phil Anderson obtained at Halley in the Antarctic in
1994 were disappointing. The limited data that I have shows noise on
the speed of sound and the UVW outputs. We were unable to identify the
source of the problem from the data available, but it does not appear
to be entirely due to low temperatures. A plot of sonic temperature
against absolute temperature is much cleaner for absolute temperatures
from -12 to 15 degrees C (the coldest in the data set)than the majority
of the data between -3 and -12 degrees C. It was suggested at the time
that the presence of high power RF transmitters at Halley could have
contributed to the problems. Phil Anderson obtained more consistent
data from two Kaijo Denki sonics. However, a proposal for the STABLE
experiment reports that the sonic proposed (presumably from KD) gives
increasingly erroneous readings above 12m/s.
On a more positive note, Andy Black from the University of British
Columbia, Vancouver recently reported successful deployment of an R2
for twelve months at temperatures down to "almost -40 C". I have
emailed him to ask if he can supply any further information.
Other than these I do not have any data from the field on low
temperature performance. I view this as encouraging since we are more
likely to hear of problems than good results! It may be worth asking
RISO if thay have any data at low temperatures.
The tests used to establish the low temperature performance of the R2
have been carried out in environmental test chambers, observing receive
ultrasonic waveforms and measuring transducer delays for a number of
transducers down to -40 C. In the early days we only had access to a
temperature chamber that would go down to -20 C, hence the original
specification. A few components required upgrading to -40 C, but from
what I remember the original parts worked OK at -40 C anyway. All the
anemometers you mention contain the latest temperature specification
parts. There are no further upgrades that improve the low temperature
performance of the R2.
From our tests to date, the components that appear most affected at low
temperatures are the transducers. If you have time you could consider
returning your R2s to Gill Instruments for recalibration. Part of this
process is to check the transducer waveforms. It appears from our
records that R2 serial number 0067 has not been calibrated since it was
built in 1992 and is worth checking. The other two anemometers you
mention were recalibrated on 23rd Nov 95 (R2A No 87) and 14th Dec 95
(R2A No. 129). These units therefore checked and calibrated less than
two years ago and should be OK.
As I mentioned in my email to John Militzer on 15th November the
transducer performance starts to deteriorate below -35 C. Our chamber
will not go below -40 C so I cannot be certain, but I would not expect
satisfactory performance much below this.
Regarding operation at shorter path lengths I am not aware of any
compensation for path length in the software. There is however a
receive time window. I am working from memory here but I think that
the start of the receive time window is timed to work at temperatures
up to 60 C and wind speeds up to 60m/s. This gives a minimum allowable
transit time of 350uS. The minimum path length that should work at say
25 C and a wind speed of 10m/s is 125mm. This may well be the
problem. What path length did you try? It is possible to move the
time window if the software is changed, but the receive timing is
interleaved with analogue inputs and other things that make it a
significant task.
I hope the above information is helpful.
Best regards
Angus Raby
- 5: Gill_Sonic_Tests, Site , Mon 30-Jun-1997 19:44:25 GMT, Andy Black email: experience w/R2 in Canada
From ablack@unixg.ubc.ca Tue Jun 24 15:19 MDT 1997
X-Sender: ablack@interchg.ubc.ca
To: Tom Horst
Subject: Re: Solent cold temperature performance
MIME-Version: 1.0
X-Lines: 30
Dear Tom,
We have operated the R2 during two winters at Prince Albert, Sakatchewan.
Air temperatures got down to about -35 C. The R2 worked fine. No
missing data except when the coating of hoar frost or snow got too thick.
We're talking about a remotely controlled electrical wire heater, but
haven't done it yet. Maybe that will not be a problem for you being so
dry up there. Mean cup wind speed agreed well with that from our R.M.
Young propeller-vane. The slope and intercept of the mean sonic air
temperature vs. mean air temperature (thermocouple) changed as a function
of air temperature as it got colder. You just need to keep your eye on
this relationship if you're calculating sensible heat fluxes or sigma Ts
using the sonic air temperature. In summary, we've been very pleased with
the performance of the R2.
Best regards,
Andy Black
------------------------------------------------------------------------------
T.A.Black
Department of Soil Science
139-2357 Main Mall
University of British Columbia
Vancouver, B.C.
V6T 1Z4 CANADA
Phone (604) 822-2730
FAX (604) 822-8639
- 6: Gill_Sonic_Tests, Site , Mon 30-Jun-1997 20:12:28 GMT, NCAR Gill, R2#87, Cold Test JD176-177
97/06/25
NCAR Sonic: 1012R2A - 0087
Test Purpose: Cold Temp. data quality assessment
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 176/13:30 7:30, Wed 6/25
2 -45 12:00 ramp-down 13:40 7:40
3 -45 1:00 hold 177/ 1:40 19:40
4 25 12:00 ramp-up 2:40 20:40
5 End-of-Pgm 14:40 8:40, Th 6/26
Configuration: Gill is oriented diagonally in chamber with asymmetric
head toward the upper, rear corner away from the circulation
system. There is about >= 1" between the Gill framing tubes
and the chamber wall. Styrafoam boards are holding up the
TRH in the middle of the chamber.
Cosmos 202: Gill
200: TRH
Notes: Ingest from Cosmos seemed to be down even though rserial
showed data coming in. Restarted Cosmos.
- 7: Gill_Sonic_Tests, Site , Mon 30-Jun-1997 20:15:16 GMT, ETL Gill, R2#129, Cold Test JD177-178
97/06/26
ETL Sonic: 1012R2A - 0129 (Asymmetric)
Test Purpose: Cold Temp. data quality assessment
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 177/15:30 9:30, Th. 6/26
2 -45 12:00 ramp-down 15:40 9:40
3 -45 1:00 hold 178/ 3:40 21:40
4 25 12:00 ramp-up 4:40 22:40
5 End-of-Pgm 16:40 10:40, Fr. 6/27
Configuration: Gill is oriented diagonally in chamber with asymmetric
head toward the upper, rear corner away from the circulation
system. There is about >= 1" between the Gill framing tubes
and the chamber wall. Styrafoam boards are holding up the
TRH in the middle of the chamber.
Cosmos 202: Gill
200: TRH
Notes: Cosmos up.
- 8: Gill_Sonic_Tests, Site , Mon 30-Jun-1997 20:16:46 GMT, ETL Gill, R2#67, Cold Test JD178-179
97/06/27, Friday
ETL Sonic: 1012R2 - 0067 (Symmetric)
Test Purpose: Cold Temp. data quality assessment
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 178/17:30 11:30, Fr. 6/27
2 -45 12:00 ramp-down 17:40 11:40
3 -45 1:00 hold 179/ 5:40 23:40
4 25 12:00 ramp-up 6:40 00:40
5 End-of-Pgm 18:40 12:40, Sa. 6/28
Configuration: Gill is oriented diagonally in chamber with Symmetric
head toward the upper, rear corner away from the circulation
system. There is about >= 2" between the Gill framing tubes
and the chamber wall. Styrafoam boards are holding up the
TRH in the middle of the chamber.
Note that on the previous test, the sensor head assy was very
close to the chamber walls, possibly touching, and that there
was a PAM electronics box also inside the chamber which may
have disrupted the results.
Cosmos 202: Gill
200: TRH
Notes: Cosmos up
- 9: Gill_Sonic_Tests, Site , Mon 30-Jun-1997 20:27:14 GMT, ETL Gill, R2#67 / PAM Elect. Cold Test JD174-175
97/06/23
ETL Sonic: 1012R2 - 0067 (symmetric)
NCAR EVE Chassis:
Test Purpose:
- Survivability / Cold Temp. data quality assessment of Gill
- Survivability of EVE:
This is the second Industrial Solutions VME chassis to be
tested. The first one failed so we'll see if it's
symptomatic of the species.
Using the same VME boards as the first series of tests (they
work), but a different PTB220 and front panel board.
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 174/18:25 12:25, Mon 6/23
2 0 1:00 ramp-down 174/19:35 12:35
3 -25 4:00 ramp-down 174/20:35 13:35
4 -35 4:00 ramp-down 174/23:35 17:35
5 -35 12:00 hold 175/03:35 21:35
see Note:
6 +25 12:30 ramp-up 175/15:30 9:30-ish
7 End-of-Pgm 176/03:30 22:00-ish
Configuration: Chamber is crammed full.
EVE box is diagonally (sort-of) placed on its side with its back
to the Gill, which is oriented diagonally in chamber with its
head all the way toward the upper, rear corner away from the
circulation system. There is about <= 1" between the Gill
framing tubes and the chamber wall.
Cosmos 202: Gill
200: TRH
Note: It's easy to see the effect of the internal air circulation
and possbile vibration in the Gill Cockpit display. It
appears to be as much as .5m/s
Note: 6:40 local Tues 6/24,
EVE at -35C beginning to show 'spurious interrupts' and will
likely die soon.
DECISION TO END TEST EARLY: reason was to speed the process and
perform quicker/shorter tests on the Gills to screen them
first. Then the chamber would be warm and ready for another
gill in the morning.
jm
- 10: Gill_Sonic_Tests, Site , Mon 30-Jun-1997 23:02:43 GMT, Campbell Sonic Cold Test JD181-182
97/06/30
Campbell Sonic: ....s/n later....
Test Purpose: - Campbell Cold Temp. data quality assessment
- Also to verify that the periodic waveform seen in the
Gill sonic's covars which begins near room temp. and
continues through low temps is a dynamic of the sensor
itself and not a manifestation of something the
chamber is actually doing.
- Also to try and break those Qualimetrics quad
pressure port with the cold....ie will they survive?
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 181/22:40 16:40, Mon 6/30
2 -45 12:00 ramp-down 22:50 16:50
3 -45 1:00 hold 181/10:50 4:50 Tue 7/1
4 25 12:00 ramp-up 11:50 5:50
5 End-of-Pgm 23:50 17:50, Tue 7/1
Configuration: The sonic head is "horizontal" in the middle of the
chamber oriented "N/S" such that the w is perpendicular to the
chamber's aspiration system grill and the probe assemblies
are both about >=2.5" below the chamber ceiling.
The electronics package is resting against the chamber wall
immediately below the cable access hole.
This probe arrangement seems better than what the Gills had.
The TRH is on some styrafoam at the bottom of the chamber with
the transducer near the door.
Two Qualimetrics quad disk pressure ports are laying in the
back of the chamber.
Cosmos 202:
200: TRH
203: Campbell
Notes: Cosmos up
jm
- 11: Elect_Temp_Tests, Site , Mon 30-Jun-1997 23:37:42 GMT, Campbell Logger Cold Test JD179-181
97/06/28
NCAR CR10X Logger: #5350 (NCAR #1)
#5349 (NCAR #3)
Test Purpose: Cold Temp. Data quality / Survivability assessment
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 179/21:35 15:35, Sat 6/28
2 -55 12:00 ramp-down 21:45 15:45
3 -55 24:00 hold 180/ 9:45 3:45
4 25 12:00 ramp-up 181/ 9:45 3:45
5 End-of-Pgm 14:45 15:45, Mon 6/30
Configuration:
Logger #5350 is in the middle of the chamber, placed on top of...
Logger #5349
Both loggers have their Tsoil probe placed inside the box,
and connected. A voltage reference standard outside the
chamber is feeding a signal to the Rnet sensor input for both
loggers. No trh was used.
Data Acquisition:
2 separate EVE boxes, one for each logger, are gathering the
data and putting it in asciidat form.
Fields recorded include:
box-t rnet trh tsoil
1997 181 17:25:00 01 29.1203 185.337 NaN -10.41
Results: Loggers survived. Unable to determine data sampling stability.
Both loggers stayed up and apparently reported data during the
entire temperature profile.
However, something odd occurred roughly 15-min after the test began.
The Tsoil and Rnet data went bad. Both Rnets dropped by about 30%
in 'DC' level and simultaneously became very noisy.
Naturally, the data returned to good about 10-min before going
to offload the initial data set on Monday morning.
The problems occurred after starting the chamber and went away
well before the chamber finished. They 'recovered' around -10C
Not sure why both loggers on independent EVE boxes did this
at the same time: ground/noise problem?
Conclusion:
These 'non-extended' temperature range CR10X logger did survive
about 1-day at -55C. They can probably be used for SHEBA spares.
Any errors induced by low temperatures are uncertain.
jm
- 12: Gill_Sonic_Tests, Site , Wed 02-Jul-1997 00:08:30 GMT, NCAR Gill, R2#87, Cold Test JD182-183, Bat-Hotel
97/06/25
NCAR Sonic: 1012R2A - 0087
Test Purpose: Cold Temp. data quality assessment.
All of the Gills tested so far have had a periodic
waveform modulated onto the data over a 6-deg. cycle.
Tests using the Campbell sonic revealed this is not
an effect of the chamber.
Gill suggested that the effect is related to a single
wavelength and it might be minimized by 'quieting' the
chamber by lining it with felt.
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 183/00:00 18:00, Tu 7/1
2 -45 12:00 ramp-down 00:10 18:10
3 -45 1:00 hold 12:10 6:10
4 25 12:00 ramp-up 13:10 7:10
5 End-of-Pgm 184/01:10 19:10, We 7/2
Configuration: Gill is oriented diagonally in chamber with asymmetric
head toward the upper, rear corner away from the circulation
system. There is about >= 1.5" between the Gill framing tubes
and the chamber wall. Black felt lines the top,back,bottom,port-
access side and door of the chamber. The circulation system is
partially covered below the exhaust vent.
1 Styrafoam board is holding up the TRH roughly in the middle
of the chamber.
Will the 2-sided tape holding the felt last through the low temp
cycle and vibration of the chamber?....Only the shadow knows.
Cosmos 202: Gill
200: TRH
Notes: Cosmos up
Results: The felt stayed in place and did not impact the sonic.
The test was ended at 183/23:00 (5pm Wed) when the chamber was
at ~15C.
jm
- 13: Elect_Temp_Tests, Site , Thu 03-Jul-1997 00:18:42 GMT, Campbell Logger Cold Test JD184-186
97/07/02
NCAR CR10X Logger: #12178 Extended Temp. Range
#12598 Extended Temp. Range
Test Purpose: Cold Temp. Data quality / Survivability assessment
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 184/00:10 18:10, Wed 7/2
2 -55 12:00 ramp-down 00:20 18:20
3 -55 24:00 hold 184/12:20 6:20 Th 7/3
4 25 12:00 ramp-up 185/12:20 6:20 Fr 7/4
5 End-of-Pgm 186/00:20 18:20, Fr 7/4
Configuration:
Logger #12178 interfaced to EVE, Station#1 is on the bottom
Logger #12598 interfaced to EVE, Station#2 is on top
Both loggers have their Tsoil probe placed on top.
The Rnet input channel (2) is shorted.
No trh was used.
Data Acquisition:
2 separate EVE boxes, one for each logger, are gathering the
data and putting it in asciidat form.
Fields recorded include:
box-t rnet trh tsoil
1997 181 17:25:00 01 29.1203 185.337 NaN -10.41
NOTE: Upon initial power on, the logger was outputting what appeared
to be random characters as determined by EVE talk program. In
addition, any attempt to attach the voltage standard to the
Rnet input resulted in severe noise, even with various
grounding schemes attempted. Ultimately shorted the Rnet
pins, but still saw the spurious character output.
Eventually things for both boxes settled out and i started the
test. Hopefully they won't begin spitting out bad characters
during the test.
Results:
Conclusion:
jm
- 14: Elect_Temp_Tests, Site , Sat 05-Jul-1997 18:43:42 GMT, EVE Box Cold Test JD186-188
97/07/02
NCAR EVE System: Electronics box w/Industrial Solutions VME chassis
and previously tested VME boards that worked to -55.
Test Purpose: Verify that the Industrial Solutions VME backplanes
cannot handle extreme cold
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 186/18:15 12:15, Sa 7/5
2 -45 12:00 ramp-down 18:25 12:25
3 -45 12:00 hold 187/06:25 00:25 Su 7/6
4 25 12:00 ramp-up 18:25 12:25
5 End-of-Pgm 188/06:25 00:25, Mo 7/7
Configuration:
EVE box is in the middle of the chamber.
Logging data: TRH, logger, AD0-3, baro
Data Acquisition:
Ascii file contents:
box-t rnet trh tsoil
1997 181 17:25:00 01 29.1203 185.337 NaN -10.41
Results:
After the test, EVE was up and running.
However, doing a "dir /card" produced nothing:
card inaccessible.
Soft reset attempt brought the station down/lock-up.
Hard power reset brought everything back.
Conclusion:
Nothing changes. We've now seen 2 Industrial Solutions
VME backplanes that've had problems.
Result: the electronics boxes will be placed inside the
TEG shelter.
jm
- 15: Gill_Sonic_Tests, Site , Mon 07-Jul-1997 18:34:13 GMT, Friehe Gill, R2A#104, Cold Test JD189-191
97/07/07
Friehe Sonic: 1012R2A - 0104
NCAR TRH with Electronic Compass and Beacon
Test Purpose: Cold Temp. data quality assessment.
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 189/22:10 16:10, Tu 7/8
2 -45 12:00 ramp-down 22:20 16:20
3 -45 18:00 hold 190/10:20 04:20 We 7/9
4 25 12:00 ramp-up 191/04:20 22:20
5 End-of-Pgm 16:20 10:20, Th 7/10
Configuration: Gill is oriented diagonally in chamber with asymmetric
head toward the upper, rear corner away from the circulation
system. There is about >= 3" between the Gill framing tubes
and the chamber wall.
The TRH is resting on a foam pad about 1" above the chamber floor.
The Beacon and Electronic compass are on the floor of the chamber.
Cosmos 202: Gill
200: TRH
Notes: Cosmos up
"Noise" on the sonic began immediately when the chamber started up,
it was quiet before that.
Results:Sonic:
The sonic had problems symptomatic of the others beginning at
-30.....Tom....
Compass/Beacon
The TRH with compass and beacon stayed up and looked OK.
The beacon did turn on/off at the -45 cold soak.
The attempt to rotate the compass to confirm it wasn't frozen
partially worked: the wire pull broke but the compass reading
did change by about 4-degrees.
jm
- 16: Gill_Sonic_Tests, Site , Fri 11-Jul-1997 14:04:17 GMT, Friehe Gill, R2A#112, Cold Test JD192-193
97/07/07
Friehe Sonic: 1012R2A - 0112 Symmetric
NCAR TRH with Electronic Compass and Beacon
AGI Electronic Level
Test Purpose: Cold Temp. data quality assessment.
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 192/01:00 19:00, Th 7/10
2 -45 12:00 ramp-down 01:10 19:10
3 -45 18:00 hold 13:10 07:10 Fr 7/11
4 25 12:00 ramp-up 21:10 15:10
5 End-of-Pgm 193/09:10 03:10, Sa 7/12
Configuration: Gill is oriented diagonally in chamber with symmetric
head toward the upper, rear corner away from the circulation
system. There is about >= 3" between the Gill framing tubes
and the chamber wall.
The TRH is resting on a foam pad about 1" above the chamber floor.
The Beacon and Electronic compass are on the floor of the chamber.
The Electronic Level is taped to a PVC pipe that protrudes through
the access hole by about 4"
Cosmos 202: Gill
200: TRH
EVE electronics box interfaces the second TRH with compass/beacon
as well as the electronic level.
Format of asciidat file:
d/t box-t temp rh Compass FET-compass FET-beacon xlevel ylevel
Notes: Cosmos up
Results:
jm
- 17: Gill_Sonic_Tests, Site , Sat 12-Jul-1997 21:40:13 GMT, Guest Gill, R3#19, Cold Test JD193-195
97/07/07
Peter Guest Sonic: 1210R3 - 19 Symmetric
NCAR TRH with Electronic Compass and Beacon
Test Purpose: Cold Temp. data quality assessment.
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 193/21:20 15:20, Sa 7/12
2 -45 12:00 ramp-down 21:30 15:30
3 -45 18:00 hold 194/08:30 03:30 Su 7/13
4 25 12:00 ramp-up 16:30 11:30
5 End-of-Pgm 195/04:30 23:30, Su 7/13
Configuration: Gill is oriented diagonally in chamber with symmetric
head toward the upper, rear corner away from the circulation
system. There is about >= 3" between the Gill framing tubes
and the chamber wall.
The TRH is resting on a foam pad about 1" above the chamber floor.
The Beacon and Electronic compass are on the floor of the chamber.
The Electronic Level is taped to a PVC pipe that protrudes through
the access hole by about 4"
Cosmos 202: Gill
201: Gill.r3
200: TRH
EVE electronics box interfaces the second TRH with compass/beacon
as well as the electronic level.
Format of asciidat file:
d/t box-t temp rh Compass FET-compass FET-beacon xlevel ylevel
Notes: Cosmos up
Results:
jm
- 18: Gill_Sonic_Tests, Site none, Mon 14-Jul-1997 20:56:27 GMT, Summary of Solent low temperature tests
Summary of temperature chamber tests of Solent sonics at low temperature
------------------------------------------------------------------------
We tested 5 R2 and one R3 Solent sonic anemometers in a laboratory
temperature chamber to investigate their performance at low
temperatures. The chamber is just large enough for a Solent to fit
diagonally between opposite corners, with the measurement array within
a few inches of two of the chamber walls and the top of the chamber.
The chamber temperature was ramped from 25 C to -45 C in a 12 hour
period, held at -45 C for one hour or more, and then ramped back up to
25 C over another 12 hours. The sonic data were sampled at 21 Hz and
statistics (means, variances, etc.) were calculated in 5-minute
blocks. The chamber temperature was monitered with a slow-response
sensor whose low temperature limit is -40 C.
The principle measures of sonic performance that we looked at were the
5-minute variances of the three orthogonal wind components and sonic
temperature. A more detailed look at a limited subset of the data used
10-minute calculations of the power spectra and cospectra.
1012R2A 0087 (NCAR) Solent: (97/6/25 13:30 - 97/6/26 14:30)
-----------------------------------------------------------
The performance of this sonic is acceptable to -35 C and somewhat
degraded at lower temperatures.
The velocity variances gradually increased with decreasing temperature
from 0.05-0.10 (m/s)^2 at 25 C to 0.05-0.13 (m/s)^2 at -30 C. Below
-30 C the variances increased more rapidly to 0.08-0.2 (m/s)^2 at -40
C. Below -30 C there was evident noise contamination of the power
spectra in the inertial subrange, particularly for sonic temperature.
The contamination generally increased with decreasing temperature.
There was a noticeable and repeatable modulation of the variance
amplitudes at all temperatures, with a period of 6-7 C. This
corresponds to one period of the 180 kHz sonic pulse. Angus Raby of
Gill Instruments suspects that this is caused by reflections of the
pulses from the walls of the chamber. This modulation was present for
all R2 Solents, but was not present for the R3 Solent or a Campbell
sonic. However we were able to locate the Campbell sonic more
centrally in the chamber (further from the walls) and it operates at
400 kHz, which would cause more attenuation of the reflected signals.
Angus also suggested that the more sophisticated 32-bit signal
processing of the R3 and Campbell sonics is better able to discriminate
against reflected signals. At the suggestion of Angus, we tried,
unsuccessfully, to attenuate the reflections with a thin layer of felt
lining in the chamber. Thus we have shown that the modulation is not
an artifact of the chamber ventillation system, but we have not shown
conclusively that it is caused by reflections from the chamber walls.
1012R2 0067 (ETL) Solent: (97/6/27 17:30 - 97/6/28 18:30)
---------------------------------------------------------
The performance of this sonic is acceptable to -35 C and somewhat
degraded at lower temperatures.
The velocity variances were 0.05-0.09 (m/s)^2 and roughly independent
of temperature from 25 C to -30 C. Below -30 C the variances increased
to 0.06-0.1 (m/s)^2 at -40 C and to 0.06-0.13 (m/s)^2 below -40 C.
The power spectra show various evidence of noise, particularly for
sonic temperature at temperatures of -40 C and below.
1012R2 0112 (UCI) Solent: (97/7/11 01:30 - 97/7/12 09:00)
---------------------------------------------------------
The performance of this sonic is acceptable to -35 C and somewhat
degraded down to -40C. The performance is poor at -40C.
Note that this sonic was held at -45 C for 8 hours, rather than 1
hour, to simultaneously test other equipment.
The velocity variances increased with decreasing temperature from
0.03-0.05 (m/s)^2 at 25 C to 0.03-0.07 (m/s)^2 at -30 C. Below -30 C
the variances increased more rapidly to 0.09-0.2 (m/s)^2 at -40 C.
From about -38 C to -44 C the variances increased very rapidly to
1-3 (m/s)^2 just below -40 C and then decreased again to 0.05-0.12
(m/s)^2 at -45 C. Note that this local maximum around -40 C has a
width near the 6-7 deg C period corresponding to one wavelength of the
sonic pulse. Without this local maximum, this sonic performed
similarly to the previous two sonics. Note that this `resonance'
occurred as the temperature passed through -40 C on the decreasing
ramp, but not on the increasing ramp.
1012R2A 0129 (ETL) Solent: (97/6/26 15:30 - 97/6/27 16:30)
----------------------------------------------------------
The performance of this sonic is not acceptable below -32 C.
The velocity variances increased with decreasing temperature from
0.03-0.15 (m/s)^2 at 25 C to 0.05-0.2 (m/s)^2 at -30 C. Below -30 C
the variances increased very rapidly, with a local maximum between -32 C
and -37 C that had peak variances of 4-10 (m/s)^2. Below a local
variance minimum at -37 C, the variances increased rapidly again to
levels as high as 50-150 (m/s)^2. However around -45 C the variances
were down to 5-20 (m/s)^2. Below -30 C there was evident noise
contamination of the power spectra in the inertial subrange,
particularly for sonic temperature. At -35 C and below, there is very
obvious noise on the 21 Hz time series for all 4 output variables.
1012R2A 0104 (UCI) Solent: (97/7/8 23:00 - 97/7/10 16:00)
---------------------------------------------------------
The performance of this sonic is not acceptable below -35 C.
Note that this sonic was held at -45 C for 18 hours, rather than 1
hour, to simultaneously test other equipment.
The velocity variances increased with decreasing temperature from
0.03-0.05 (m/s)^2 at 25 C to 0.05-0.06 (m/s)^2 at -30 C. Below -30 C
the variances increased very rapidly, with a local maximum between -38
C and -42 C that had peak variances of 50-200 (m/s)^2. The sonic
stopped reporting for about 15 minutes just below -40 C. However, at
-45 C the variances again returned to amplitudes of 0.04-0.10 (m/s)^2.
The power spectra show a small amount of noise in sonic temperature
at -30 C, very obvious noise in v and w and a small amount in
temperature at -35 C, and then a small amount of noise in u, w, and T
at -45 C. At -40C there is very obvious noise in the time series for
all components.
1210R3 0019 (NPS) Solent: (97/7/12 21:30 - 97/7/14 05:30)
----------------------------------------------------------
The performance of this sonic is not acceptable below -30 C.
Note that this sonic was held at -45 C for 8 hours, rather than 1
hour, to simultaneously test other equipment.
The u and w variances increased gradually with decreasing temperature
from 0.04-0.05 (m/s)^2 at 25 C to 0.04-0.06 (ms/)^2 at - 30 C. In the
same interval the v variance increased rather sporadically from 0.11
(m/s)^2 to 0.2 (m/s)^2. The periodic modulation of the variances seen
on the R2 sonics is not evident on this R3 sonic.
Below -30 C the variances increased very rapidly, with a local maximum
between -33 C and -40 C that had peak variances of 40-150 (m/s)^2.
However around -45 C the variances were down to 0.1-0.2 (m/s)^2 for u
and w and 1.2 (m/s)^2 for v.
- 19: Gill_Sonic_Tests, Site , Mon 14-Jul-1997 23:19:20 GMT, Friehe Gill, R2A#112, Cold Test #2 JD195-196
97/07/14
Friehe Sonic: 1012R2A - 0112 Symmetric
Test Purpose: Cold Temp. data quality assessment.
The earlier test had reasonable results except for a
bit of a problem when the -45 cold soak began.
This test is intended to determine whether or not
the problem was a quirk or not.
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 195/23:00 17:00, Mo 7/14
2 -45 12:00 ramp-down 23:10 17:10
3 -45 18:00 hold 196/11:10 05:10, Tu 7/15
4 25 12:00 ramp-up 12:10 06:10
5 End-of-Pgm 197/00:10 18:10
Configuration: Gill is oriented diagonally in chamber with symmetric
head toward the upper, rear corner away from the circulation
system. There is about >= 3" between the Gill framing tubes
and the chamber wall.
The TRH is resting on a foam pad about 1" above the chamber floor.
Cosmos 202: Gill
200: TRH
Notes: Cosmos up
Results:
jm
- 20: Elect_Temp_Tests, Site , Wed 16-Jul-1997 20:27:32 GMT, EVE Box Cold Test JD197-199
97/07/16
NCAR EVE System: Electronics box w/Shroff VME chassis
and VME boards rated only 'commercial' grade
(CPU,A/D,PCMCIA)
TRH/Compass/Beacon:
Test Purpose: - EVE: Determine whether the 3 commercial rated boards will
operate in extreme cold.
- TRH/Compass: determine if the problems seen with the
other TRH system are 'fixed' by replacing the cpu4ad board
only.
Verify cold temp. operation.
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 25 00:10 soak 197/20:05 14:05, We 7/16
2 -45 12:00 ramp-down 20:15 14:15
3 -45 10:00 hold 198/08:15 02:15 Th 7/17
4 25 12:00 ramp-up 18:15 12:15
5 End-of-Pgm 199/06:15 00:15, Fr 7/18
Configuration:
EVE box is in the middle of the chamber.
Logging data: logger, AD0-3, baro, Gill
Data Acquisition:
Metppf files
Results:
Conclusion:
jm
- 21: Gill_Sonic_Tests, Site , Wed 30-Jul-1997 14:29:13 GMT, NCAR Gill, R2#87, Cold Test JD210-212
97/07/29
NCAR Sonic: 1012R2A - 0087
Test Purpose: Cold Temp. data quality assessment.
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 -45 06:00 ramp-down 210/21:00 15:00, Tu 7/29
2 -45 18:00 hold 211/03:00 21:00
3 -35 1:00 ramp-up 21:00 15:00 We 7/30
4 -35 6:00 hold 22:00 16:00
5 25 6:00 ramp-up 212/04:00 22:00
6 End-of-Pgm 10:00 04:00, Th 7/31
Configuration: Gill is oriented diagonally in chamber with asymmetric
head toward the upper, rear corner away from the circulation
system. There is about >= 1.5" between the Gill framing tubes
and the chamber wall.
Cosmos 202: Gill
200: TRH
Notes: Cosmos was down for the first ~1.5 hours of the chamber run and
archiving didn't begin until about 16:30 local on Tuesday afternoon.
The temp. at that point was about 8-deg.
Results:
jm
- 22: Gill_Sonic_Tests, Site , Mon 04-Aug-1997 14:17:15 GMT, ETL Gill, R2#67, Cold Test JD214-216
97/07/29
ETL Sonic: 1012R2A - 0067
Test Purpose: Cold Temp. data quality assessment.
Chamber Program
Step Temp Time Type Begin-Z(approx) Local-Time
---- ---- ---- ---- --------- ----------
1 -45 06:00 ramp-down 214/16:45 10:45, Sa 8/2
2 -45 18:00 hold 22:45 16:45
3 -35 1:00 ramp-up 215/16:45 10:45 Su 8/3
4 -35 6:00 hold 17:45 11:45
5 25 6:00 ramp-up 23:45 17:45
6 End-of-Pgm 216/05:45 23:45, Su 8/3
Configuration: Gill is oriented diagonally in chamber with asymmetric
head toward the upper, rear corner away from the circulation
system. There is about >= 1.5" between the Gill framing tubes
and the chamber wall.
Cosmos 202: Gill
Notes: Cosmos up. No TRH available for this test.
Results:
jm
- 23: Gill_Sonic_Tests, Site , Tue 05-Aug-1997 17:07:30 GMT, Results of cold soak tests
The recent cold soak tests of NCAR R2A 0087 and ETL R2 0067 Solent
sonics produced results that appear to be entirely consistent with the
previous, shorter duration tests in the temperature chamber.
- 24: Daily_Status, Site , Sat 11-Oct-1997 03:58:44 GMT, Status from 6-Oct-97
TODAY:
General ship unloading work, esp. w/Ed Andreas, Marty.
Found Rocky, haven't configured it/anything yet.
CONCERNS:
- Propane filling procedure. Ship doesn't have a scale to
verify weight/fill of the tanks. Relying only on the tank's
gauge could possibly lead to tanks that aren't filled completely
and subsequent loss of our scant 20-day capacity.
Consider bringing simple house-hold scale to weigh up to 50-lb.
- Static pressure port. This is going to ice up (everything does).
Will that plug the port's holes? This could be a problem.
- Storage / work area. This doesn't seem available. The ETL
crew may need to simply keep our spares in a box on deck(?) and
work from their room.
COMMENTS:
Consider bringing more WD40 (excellent for melting ice)
- 25: Daily_Status, Site all, Sat 11-Oct-1997 04:04:13 GMT, Status from 8-Oct-97
Tom, Notes 8-Oct-97, 20:30 AK
IMPORTANT QUESTION/COMMENT FOR STEVE I NEED INPUT ON:
Campbell: I haven't been able to successfully load new coefficients.
Through EVE talk (started or stopped condition) spurious characters
keep coming through after the message. Also, the 2718H method
does not go into interactive mode at all and I don't know where a
CR10X manual is. Does this sound like an EVE configuration
problem, or something that you've seen before.
Misc: Steve: yes we have spare pcmcia cards.
Weather:
25 knot winds began this afternoon, -12C. Worse tonight.
Difficult working conditions, low visibility, blowing snow.
Losing sun at 18-min/night.
Tomorrow a low pressure system is supposed to pass near here
and the condition may not be any better.
Logistics:
Having Kurt on the Louie and the subsequent transit time
back and forth really cuts down on the working hours.
He's been voluntarily skipping going back for lunches, but
even at that, when the dinner starts at 4:30 and the 'shuttle'
runs roughly at 9 to here, ll:15 to there, 1 to here, 4:15 to
there, 5:45 to here and 6:45 to there, it hurts.
The ships are going to transfer fuel beginning tomorrow and
possibly through Friday. Hopefully personnel xfr after that
and maybe Kurt will be moved here Saturday.
I don't know what these ship schedules will do to us when
we go out for a station setup.
Site Survey:
-- THIS IS BECOMING A MAJOR CONCERN BECAUSE IT STILL ISN'T DONE.--
Still waiting on Helo, they're still prioritied to bouys and
one pilot is ill. Don't know when flying begins.
I'm hoping that one possible site 2km out can be surveyed and
then setup on Friday, but that might not be possible given the
weather. Have discussed situation with Ed.
Status:
1-station up on battery last night.
TEGs: Startup has been difficult.
We got these running this am.
It'll took all day to adjust these and I'm still not
certain they're right yet.
I now have all 4 boxes on the air and TEGs up as best we could do.
Station 3 has a Campbell/TRH running along with EVE.
Will need to continue tweaking to optimize TEGs tomorrow.
I broke the 'TEG-input' Amp connector on sled-2's battery box
in the cold (they're not as good as manuf. said). I also sprung
sled-1 lid's hinges when it was caught by the wind. Now the box can't
hold the lid upright any more, and can't fix it; will need
to use a rope. I might be able to get another set of hinges from
Wilson Case later this year.
Sleds had to have their hitched modified to match the machines here.
Hopefully we'll try towing test tomorrow.
Shebop / RF running. Seems to be polling OK. No time server here
but Gordon's software seems be alright with that even if the data
time sync is a bit slow. Also haven't played with trying to
print yet: no time to do. Gordon's documentation was extremely
helpful and accurate from what i've seen...thanks much.
Direct 'tip' to EVE console works pretty well (best way to do
console operations given difficulty w/portables) but I've just been
physically swapping the connector to ttyb instead of bringing up/down
ppoll.
Suggest you bring:
Cigarette Lighters (but available on ship here also 4z)
Flint Striker, Cold weather Leak Detect Fluid, Procomm Manual
Scale: bath style best to set tank on; spring OK but not as good.
Black Compaq carrying case. Pat should have this
at home because I brought the Compaq without its case.
Rocky case is lousy for the field, compaq is better.
Tom, please ask Pat to send email to me, the addr. I have is
wrong...thanks.
Field Computer:
The Rocky screen 'died' last night within 15-min and it's battery
doesn't last long, plus the mouse is hard to use. Today it worked
a bit better when placed directly over the TEG. The Compaq screen
doesn`t last.
It is quite difficult to use.
Service personnel will absolutely need hand warmers for the screen.
The black compaq case is better for that purpose.
RE GORDON:
Polling Machine:
Yes, bring the Laptop per Gordon's suggestion.
Call it `pampoll' 142.130.59.206
shebop = 142.130.59.204
rocky = 142.130.59.205
pampoll= 142.130.59.206
domainname = spo.ca
mask = 255.255.252.0
printer = 142.130.59.50 hp laserjet 'shebaprinter' 6M PostSc.
printer = 142.130.59.10 hp color laserjet 5M PostSc.
RE GORDON/STEVE:
TRH / Config. Mismatch / Splus:
The TRH data appears to have a timeout problem in the config that
causes it to be interpreted by EVE incorrectly part of the time
because of inconsistent parsing. I'll try to fix
that by setting timeout=.5 seconds in the sbus command.
We seem to be using fmt0055.dat now. That's what I'll edit,
plus on the portable.
I also still need to confirm configurations between the EVE/Base
versions.
Splus came up but i couldn't read the sparse baro data from
the station last night: error =
---------------------------
Error in plot.ats(x, xlim = ..1, type = ..2, col =..: all data in timeseries is
NA
Dumped
Error in dialog.send(paste("dialog setcurrent", di..: Dialog handling system not
started!
Error during wrapup
---------------------------
I assume this problem relates to inconsistencies in the config.?
Or else because I naively asked for data from all stations when
only 1 was up?
So far I have only been able to try it once, there hasn't been
much time to play with it. Maybe the next go around it'll work.
Re GAME Transmitter:
Not much time or documentation here to really go over this.
My initial impression is that they've done things OK but I must
take a better look at the message.
I recommend watching the transmission using a RF wattmeter
while it comes up at the scheduled time
to make certain that the cable/antenna is OK by confirming there
is about 10-Watts forward power and ~.7-Watts reflected.
A bad connection/antenna will reflect considerably more and
prevent the signal going to the spacecraft.
There's also a possibility that the transmitter's battery voltage
detect circuit thinks there isn't enough juice and is canceling
the transmission itself. If the message doesn't go out with
10-Watts forward power, that's a possibility. I believe there's
something in the EVE cheat-sheet manual referencing to this circuit
or else in the regular Signal Engineering document. Anyway,
I believe that if the battery droops below roughly 11.5VDC when
the transmitter turns on, that circuit will cancel the message.
More Later, JM
- 26: Daily_Status, Site all, Sat 11-Oct-1997 04:06:03 GMT, Status from 9-Oct-97
Tom, Notes 9-Oct-97, 22:45 AK
Weather: Today was better for working. 5-ish m/s, -10-ish,
intermittent snow showers.
Expecting calm enough conditions for the next 2-3 days, but
it's uncertain about cloud/visibility.
Personnel: Pat and I just canceled our AK vacation. Either Kurt or I
can/will be prepared to stay (probably me). No guarantees
for rides out on the 20th. Will play it by ear. I'll trust
that you (Tom) will be able to fill all the holes in the base
with new code/expertise/time, etc. I'll grab the ftp's from
Gordon when available and can get to it.
Tom: Can you have Celia change my airline reservations to
return all the way to Denver and open-end it?
Project: The Louis repositioned adjacent to the D.G. and the fuel
transfer began today. It will finish
tomorrow. The Louis leaves on Saturday the 11th.
Tomorrow is the last opportunity for flying at all. If
conditions permit, one helo will be devoted for photo-survey
including PAM sites. No guarantee. If we cannot fly, the
sites necessarily must be found by snow-mobile and will be
much closer to the ship.
PAM Status:
We had a mini-mtg w/Ed,Marty,Kerry,Kurt,I which helped us get
better organized (will be nice to have everyone together).
We pulled all 4 sleds today ~250m to adjacent the met hut.
That went OK, but it was nice to be going on beaten down
tracks with only a few drifts from the wind storm. It's going
to be very challenging to pull these things around 'out there'
where light and contrast are problematic. It'll be all too easy
to get stuck.
One full station setup today with sensors. All four reporting
to base.
Played with TEGs on 3 Sleds. For most part they're close to
being acceptable.
Found first dead 4-comp fan today.
Ed/Kerry helped quite a bit today. Marty/ETL has already
finished their phase-1 goals for doing before the first wave
arrives.
Gill: aligned with 'u' north to parallel the north on the TRH
compass so that they are reporting similarly even though the
xarms are 90-deg off. We'll need to talk about how to back
out the wdir data from the gps and magnetic deviation data
later. Suggestions?
Configuration / Splus:
I rebuilt fmt0055 on the base and put that onto all stations.
That 'timeout=.5' seems to have fixed the TRH/EVE sync
problem: good.
If Gordon/Steve's new fmt0050 comes here, it must have that in
the sbus command for the TRH, or else i'll do it before
downloading to stations.
I haven't yet tried plotting data with the new format yet, and
in fact haven't restarted the DAQ/pdecode yet....just did now
at 10pm. Will look at data hopefully early
tomorrow......nope, no go.
Gordon:
Can't remember what i said before but have noticed stnplot
doesn't seem to let me select just 1 station.
The dialog handling system doesn't seem to be starting which is
causing crash problems. Should i remake splus, or wait for
your new versions per the other message?
TRH Notes:
Using EVE talk, the beacon came on as advertized, but it's a big
problem not having an "OK" reply from the sensor/eve that it
works. Getting
Enter Command --> BEACON
ERROR: No response from sBus
Is unacceptable when you're getting ready to go out into the
night. If there's time a new ROM with a simple reply entry in
that command option would really help.
PVC Mounting shields are insecure. The panduit ties used
don't appear to be low temp. grade. The parts are slipping.
We'll use our better ties, but this must be addressed.
Perhaps some low-temp. tape? Is that available that you
(Steve) can get? The as we fix it will probably work, but
i'd hate to see the shield fall into the snow.
Logger Notes:
Borrowed Campbell keypad and programmed sled-2 CR10X. Worked
very well. RECOMMEND STEVE GET ONE ON ORDER IF NOT BRING ONE
HERE, however we might be able to continue to borrow one as
needed. The EVE talk method described in our cheat sheet came
closer to working with a different CR10X than the first one i
tried, but it appeared to hang in the interactive mode without
ever allowing access to the memory location.
Will program remaining coefficients tomorrow using keypad.
With the new EVE config. and CR10X reprogrammed I noticed on
the startup that the logger stayed with 5-second reporting and
I didn't see any more of the spurious characters previously
reported. I haven't had a chance to go through the
config./CR10 message format to confirm this is a fix. Will
know when i look at the others tomorrow.
Data: The 4-comp. data appeared a bit odd but maybe in the ball park.
We confirmed that the physical sensor is being reported on the
correct EVE variable. From 7:00 tonight during low twilight,
thin but essentially complete cloud cover, here's a rep. of the data:
PSP in = 0, out = 0
PYG in = 248, out = 270 (warmer ocean than air)
Tdry = -10.15, Tdry2 = -10.26, RH = 89.05
Baro = 1018.32 (note box temp later showed +11 when outside
=-12, so the TEGs are definitely warming things up)
u/v/w = consistent with observed.
Schwarz Note:
Moving the pentapod with the schwarz takes 2 people and is
awkward. Plus the entire station is unstable unless it is
directly to the south tripod leg. Note we haven't tried the
anchoring technique yet. I wonder how well that small fender
washer will work. Hopefully tomorrow, but the time really
does fly (if not us).
GPS Notes:
There's a lot of drift of the ice. Simply having
lat/lon. probably won't be enough to find the sites, relative
bearing and marking of the trail is needed. (We moved about
12 miles in the wind yesterday.) We'll try to use the
electric fence posts as markers.
Having an Splus plot of ice-station drift would be helpful,
but low priority at this point. It would be nice at some
point to reprogram the gps to provide heading information via
EVE.
Later, JM
- 27: sled-1, Site 1, Sat 11-Oct-1997 06:17:15 GMT, Sled-1 hinge broken
The lid on sled-1 was caught by the wind which sprung the hinge.
This happened roughly on 10/7.
A rope or strap is now needed to hold it open.
The exhaust stack also had some of its inadequate rivets pop loose
although it seems to be holding OK.
BEWARE not to push it over and have it flop enough to smash it more.
- 28: sled-1, Site 1, Sat 11-Oct-1997 06:20:32 GMT, Sled-1 GPS wire cracked
Note the PVC insulation on the GPS cable for sled-1 cracked in the cold.
The sensor is still working. This happened roughly 10/7.
- 29: sled-4, Site 4, Sat 11-Oct-1997 06:22:41 GMT, Sled-4 vent insulation removed
See status note from 10/10 and TEG notes.
The internal insulation covering the vent adjacent to the TEG
was removed to help prevent overheating and improve TEG performance.
Before winter this will need to be covered again probably.
NOTE, the vents will need to be uncovered sooner in spring than
anticipated, and more venting may be needed.
- 30: Base_Software, Site all, Sat 11-Oct-1997 19:27:52 GMT, fmt0050.dat created / downloaded to stations
Gordon's new ftp file was received today which included
$PAM/config/fmt0050.dat
I edited the file to increase the trh timeout from .25 to .5 seconds,
and EVEmaked the sta00x.dat files.
These files were transferred to the Laptop and the remote stations....or
at least that's my intention to do now...
- 31: Daily_Status, Site 1, Sun 12-Oct-1997 02:38:22 GMT, Station 1 Setup
Station 1 was setup today, Saturday 11-Oct-97.
It is approximately 1.5 miles north of the ship on smoothe ice at this time.
The weather held off nicely and stayed calm with thin high stratus cover
and temps in the -14 range.
TEG / Propane Status
2 full bottles.
Gps Location: 75:24:21.48
-144:33:32.09
Gill Sonic: Carl Friehe's R2 sonisc s/n 112 (?i think) was installed
Compass/Gill Orientation:
The physical alignment of the gill and the electronic compass both
are pointing in the same direction: toward the mast as viewed from
the hygrothermometer. At the present time, this is looking pretty
close to due west.
Compass reading = 228.96
Adjusted for Dec= 266.66 (ie declination = 38 which is consistent)
Station Orientation:
The 4-component system is directly south of the station at the
present time. The sled is pointing towards the station and about
10-m to the WSW. The sun shadows will be longer from there but
the scientific need is to obtain the maximum readings which will
be more likely from due south.
Rad. Level: x=-.23, y=.1
- 32: Thermal_Generators, Site all, Sun 12-Oct-1997 03:42:51 GMT, TEG / Propane Fill Status Record
TEG:
Propane Maintenance schedule
Sled-1 Sled-2 Sled-3 Sled-4
------------ -------- ----------- -------
Fill Dates 10/11, 2 ea. 10/14, 2ea. 10/12, 2 ea. 10/18,(#3,#5)
Next Fill drop-dead 31-Oct 3-Nov 1-Nov 7-Nov
Factory Ratings:
VOC, element 3.99 3.90 3.94 3.87
Gauge Pres. kPa 58 63 58 64
Current Settings:
10/10/97 58/3.56 63/3.83 58/3.78 63/3.62
10/14 64
10/15 57 56
Sled-1 Sled-2 Sled-3 Sled-4
DC Supply voltage (VOC) 15.0 14.5 14.5 15.0
Note: Increasing the DC supply voltage increased the power/current provided by
the TEGS to the PAMs significantly over the factory settings of 14.1
Pressure Setting Note:
John Hutchinson from the Global factory in Calgary said that setting
the pressures to factory levels seemed to be required for him at sea
level despite what the manual says about reducing it by about 9kPa.
He said that shouldn't damage the elements.
Obviously periodic checking of the open circuit voltage to be less
than the max rating of 4.1 is necessary.
Air/Fuel Mizture Note:
The factory air/fuel mixture setting starting point is by
turning full closed in the CCW direction, and then opening
back up by 4.5 turns CW.
On 10/10, all four TEGs were set at 1/4 turn CCW from what the
factory setting was, making them slightly more fuel rich.
- 33: Daily_Status, Site 3, Mon 13-Oct-1997 05:12:49 GMT, Station 3 Setup
Station 3 was setup today, Sunday 12-Oct-97.
It is approximately 2 miles east of the ship on smooth first year ice
that is surrounded by older, hummocky ice. There is about 2cm of snow
cover.
The weather held off nicely with low wind, partial sun and thin high
stratus cover. Temps did drop into the -20 range.
TEG / Propane Status
2 full bottles.
RF / LOS / Remote Console Problem
Station Data is getting into the packet files, but the first
attempt at remote console didn't work. More careful typing
might allow this operation.
The ship's stack or perhaps the rear mast, appears to be
slightly blocking the view of this station even though it is
clearly in sight from the bridge area.
Caution: Logger connection
The logger wasn't coming in at first. The RJ45 connector on
the electronics box power/connector panel was a bit loose.
This could possibly happen again during a station move.
Gill Sonic: NCAR asymmetric R2A sonic s/n 119 (?i think) was installed.
Compass/Gill Orientation:
The physical alignment of the gill and the electronic compass both
are pointing in the same direction: toward the mast as viewed from
the hygrothermometer. At the present time, this is looking pretty
close to due west.
Compass reading = 226.38
Adjusted for Dec= 264.28 (ie declination = 38 which is
consistent)
Hand compass (with 38 decl) alignment of TRH xarm = 265
Station Orientation:
The 4-component system is directly south of the station at the
present time. The sled is pointing away from the station and about
10-m to the WSW. The sun shadows will be longer from there but
the scientific need is to obtain the maximum readings which will
be more likely from due south.
Rad. Level: x=1.2, y=2.8
NOTE: The electronic level was considerable off for this
station. A buble level confirmed visual inspection. The
readings shown represent the values after leveling with the
bubble.
Hardware:
The sawhorse was extremely difficult to setup because the legs
were totally frozen in the tubing. It took considerable
effort to pound, screw, etc. them out.
NOTE: it appears the bending of the sawhorse arrangement and
the flex in the configuration may wobble the legs and cause
movement, perhaps in high winds.
- 34: Sonic, Site 1, Mon 13-Oct-1997 05:42:01 GMT, Sonic Misalignment, Sta 1
Station 1 was setup with the sonic aligned parallel to the electronic compass
north, with the north position facing 'down the TRH xarm toward the tripod' and
90 CCW viewed from the top from the sonic xarm.
This configuration will cause excess wind obstruction from the sonic's mounting
arm and needs to be changed so that the north faces in the parallel direction
with the sonic xarm.
- 35: Sonic, Site 3, Mon 13-Oct-1997 05:45:31 GMT, Sonic Misalignment, Sta 3
Station 3 was setup with the sonic aligned parallel to the electronic compass
north, with the north position facing 'down the TRH xarm toward the tripod' and
90 CCW viewed from the top from the sonic xarm.
This configuration will cause excess wind obstruction from the sonic's mounting
arm and needs to be changed so that the north faces in the parallel direction
with the sonic xarm.
- 36: Thermal_Generators, Site all, Tue 14-Oct-1997 15:33:20 GMT, TEG overwarming Sleds 1,2,3
Looking at baro data for sleds 1,2,3,4
it appears that the insulation for the sleds is too good.
This morning the temps:
sled trh baro/electronics
1 -17 50 full config, deployed
2 -16 31 checkout config., no sonic
3 -17 50 full config., deployed
4 n/a 25.4 checkout config, trh, 4-comp, no sonic
This station had vent insulation removed.
MUST DO:
All three sleds 1,2,3 need to have their vent insulation removed.
The barometer temp rests on the electronics box 'bottom' plate
directly over the propane tanks. It is probably slightly elevated
in temp. from the overall box because of the EVE heat generated.
- 37: Daily_Status, Site 2, Tue 14-Oct-1997 22:29:45 GMT, Station 2 Setup
Station 2 was setup today, Tuesday 12-Oct-97.
It is approximately 2 miles south of the ship on rough ice.
The weather is continuing to hold off with low wind, partial sun and thin
stratus cover. Temps did drop into the -20 range.
TEG / Propane Status
2 full bottles.
Removed the vent insulation and cover plate after seeing the
other stations last night getting too warm inside.
RF / LOS / Remote Console
Station Data is getting into the packet files, and the remote
console seems to be working quite well.
Gill Sonic: ETL asymmetric R2A sonic s/n
TRH: s/n 4 -18.9C, 83%
Compass/Gill Orientation:
The electronic compass is oriented with its 'north' point back
towards the mast as viewed from the hygrothermometer.
At the present time, this is looking close to due west.
Elec. Compass reading = 226.85
Adjusted for Dec = 264.45 (ie declination = 38 )
Note difference between this and the hand-held compass:
Hand compass = 275 (with 38 declination)
The alignment of the gill is oriented with it's 'north'
axis pointing correctly: essentially north, along/parallel
with its xarm. It is within compass accuracy of 90-deg from
the trh xarm: 275+90 = 5-deg.
Station Orientation:
The 4-component system is directly south of the station.
The sled is pointing toward the station and about 10-m to the
ESE. The sun shadows will be longer from there but
the scientific need is to obtain the maximum readings which will
be more likely from due south.
Logger / 4-Comp.: s/n 3
Rad. Level: x=.84, y=.94
We didn't attempt to correct these readings or confirm them
with the bubble level in order to not disturb the snow.
Visually these numbers seemed reasonable.
We used conduit to put the surface cables up most of the
sawhorse leg.
- 38: Sonic, Site 1, Thu 16-Oct-1997 02:23:17 GMT, Sonic alignment correction: Sta 1
Station 1 visited today:
Asymmetric Gill sonic realigned to have 'north' pointing outward from the
boom arm per the standard installation technique.
3/31/99
This appears to have occurred at 22:00 GMT, Oct 15 - TWH
- 39: Sonic, Site 3, Thu 16-Oct-1997 02:26:28 GMT, Sonic alignment correction: Sta 3
Station 3 visited today:
Symmetric Gill sonic realigned to have 'north' pointing outward from the
boom arm per the standard installation technique.
3/31/99
This appears to have occurred at 19:00 GMT, Oct 15 - TWH
- 40: Sonic, Site all, Thu 16-Oct-1997 02:29:45 GMT, Sonic heights
Sonic height measurements:
Date: Sta-1 Sta-2 Sta-3 Sta-4
10/15 (setup) 346cm 346cm 345cm
10/23 (moved) 348cm
1/25/99 John recalls that these heights were to the center of the
sonic arrary or "sampling volume".
- 41: Visit_Log, Site 1, Thu 16-Oct-1997 02:31:59 GMT, Station 1 Visited:
Station 1 visted:
Gill sonic realigned to point north. (also logged elsewhere)
Sonic height remeasured. (also logged elsewhere)
Removed Sled TEG vent insulation
Downloaded local data
Improved trail marking.
Comments:
Ice on domes for PSP-in/out, PYG-in
Ice on inlet for TRH
- 42: Visit_Log, Site 3, Thu 16-Oct-1997 02:35:30 GMT, Station 3 Visited:
Station 3 visited
Gill sonic realigned to point north. (also logged elsewhere)
Sonic height remeasured. (also logged elsewhere)
Removed Sled TEG vent insulation
Downloaded local data
Communications Note:
Somewhat poor response on remote console operation for this
station. Didn't see anything obvious, the connectors seemed
tight. I did lower the sled's tow-bar which was between the
sled and the ship, even though at most it would have obstructed.
the lower 1/3 of the antenna (ground plane?)
This evening, the console operations seem to be better....Maybe
that was it.
Comments:
Ice on domes for PSP-in/out, PYG-in
Ice on inlet for TRH
- 43: Base_Software, Site base, Thu 16-Oct-1997 04:13:58 GMT, SHEBA Printers
I finally got around to adding the printers tonight.
I named these:
color1 142.130.59.10 color laserjet 5M
sp_1 142.130.59.50 B/W laserjet 6MP
I added to the PAM login:
letenv LPDEST sp_1
I have not configured in a default system printer though.
- 44: Rad_System, Site all, Thu 16-Oct-1997 18:50:01 GMT, Radiometer Icing Discussion
Some thoughts to keep hold of for now on the Radiometer Icing Issue:
Tony is looking into stronger ventillators..
------------------------------
Subject: Re: Rime icing
To: delany@ucar.edu (Tony Delany)
Date: Tue, 14 Oct 1997 20:20:42 -0800 (AKDT)
Cc: horst@stout.atd.ucar.edu, militzer@spows.spo.ca (John Militzer)
Tony,
>
> John,
> we could provide additional ventilation by either:
> ...
> If we heated the air at the ventilator it would cool
> during its passage through the tubing.
> Direct heating would have to be done at the base of each dome.
>
> Can you tell me the sort of weather conditions lead to riming?
> Is the riming only due to the transitional conditions which are
> occuring now or will they persists into the winter?
> Tony
Steve and Chris should be here tomorrow so we can chat about
all this.
I can't answer about the 'transitional' issue, but some folks
here seem to think that it's more common through the year
because of the blowing snow conditions. I saw the most of it
during the storms we had when the winds were 20-35 knots and
also when there was fogging. The fans couldn't stave off the
ice, and once iced, they can't clean them. In fact today
before going out to setup sta2, we had to take the 4-comp into
the met-hut for warming to free things up and dry. Having a
small heater in the schwarz might help but i'm frankly not
sure. Judging from the power data, there's quite a bit of
spare: perhaps 1 Amp, but i want to keep some in reserve for
battery recharging when/if that becomes necessary. Menwhile,
see my note in the status rpt about the excess heat in the
sleds from the TEGs. You're probably right that the air would
cool too much going out to the sawhorse.
More ventillation should help, but i doubt in 20-30 knot winds
anything we can realistically put in would overcome that.
The Scientific Solutions approach was to put the radiometer
(1-each) on a rotating plate that is programmable to cover-up
the sensor, heat it and calibrate during non-measurement
periods. Their config. is to measure 1 value during ~30-sec
ea. hour. (Note they have a motorized auto self-leveling
system). Because its programmable, they can set it up to run
continuously and then cover/clear maybe 1-hour/day for
example. Problem = patented, expensive ($15K), and only
1-component.
We might be able to rig something that includes a small 10-ish
watt heater at the base of the domes as you mentioned to turn
on for maybe 1-hour every 12/24 hours and hope that would
remove any buildup in addition to the stronger fans. The main
battery can handle the excess and we could use a power
switching circuit similar to what's in the trh. In fact,
we've talked about integrating the whole thing anyway, and
with its own CPU, we could also build in that motorized self
leveler. (PS leveling the sawhorse thingey without screwing
up the snow is extreme difficult esp, when the legs are frozen
solid).
Anyway, I have doubts that the fans we have will last very
long anyway either in the 4-comp or trh. Icing will effect
them too, if not the serious cold.
JM
- 45: Rad_System, Site all, Thu 16-Oct-1997 19:08:55 GMT, Radiometer Icing Observation Note
From yesterday's station visits, I have in my notes that my impression of
the icing amount on station 4 was greater than that observed on stations
1 and 3. This is significant because Station 4 didn't have the ventillator
plugged in the previous night.
So, the ventillator does appear to be doing some good, but is inadequate.
That might imply that a 'turbo' solution could have some hope of working.
- 46: RF_Communications, Site all, Fri 17-Oct-1997 04:22:58 GMT, Communications Problems Discussion from 13-Oct
Date: Wed, 15 Oct 1997 17:03:10 -0600
From: Terry Hock
To: militzer@shebaship.apl.washington.edu
CC: horst@stout.atd.ucar.EDU
Subject: Re: comm questions from John
Hi John,
How's the weather?
> Tom, Notes Monday 13-Oct-97, 20:30 AK
>
> Communication Problems, Bad News:
>
> A: The line-of-sight to station 2's location was behind the
> main mast from the antenna. The survey crew apparently had
> forgotten to check for that. As a result we began looking for
> an alternative antenna location on the mast using the 200'
> cable and spare antenna we brought. The places we tried
> performed worse than the CG installation in terms of 'seeing'
> stations 1&3. What we really needed was an installation on
> top of the rear mast as originally planned, but that should
> have been done in Quebec and is probably not possible now,
> certainly not with the cable/spare antenna we brought, which
> is either bad or has too much loss. The ship is definitely a
> hostile environment for the low power freewaves.
>
> For now:
> This evening Pierre (ace elec.tech./eng.) and i moved the stub RG213
> cable he'd built to the main mast as a jumper from the starboard
> antenna mount to a point higher on the mast he found
> as an alternative. This point has better LOS to all 3
> station locations, but we haven't made it permanent
> yet. Also it is behind the radar, which could be a problem
> when that is operating. I don't know how much power/freq. it
> operates on and whether that might bomb the freewave when it
> is turned on. We might be able to move our antenna behind
> the mast from the radar though. Anyway, I have seen data
> coming in from all 4 sleds which is encouraging, and am able
> to do console operations with each. Admittedly it is quite
> 'rough' with sta-3 and many characters are dropped. Sending
> big blocks of data is more robust.
>
> One worry is when breakup begins. For now, the 3 site are
> probably 'fixed', but with breakup there's a chance that the
> station(s) could move outside the antenna look angle although
> the new location is about as good as we can get on the main mast.
>
> To consider:
>
> Possibly a crossed yaggi arrangement using a splitter to hit
> the major quadrants around the mast. This could be either 2,
> using the reduced gain back lobe, or else 4 antennas, but the
> 3db loss per splitter is an issue.
>
> Tom, please discuss this situation with Terry and Freewave:
> Could a splitter/crossed yaggi arrangement likely work?
> Also, we're in international waters where no-one is, can the
> power be increased of the radios?
>
> - Also, access to the rear mast might be more possible in spring
> and we could measure the distance and build a better cable,
> mount arrangement for installing then.
> - Another thought would be to install the yaggis on the PAMs,
> The risk is rotation moving them out of LOS; i recall the
> yaggis have 30-deg. beam. That would require a new mount but
> that'd not be too difficult. It may be worthwhile to consider
> bringing the yaggis up and building a 1" PVC or steel pipe
> arrangement to clamp the yaggis to.
>
> - A higher power radio might be a good idea. One of the
> project folks says they use HF (good range, lower data rate)
> up here and never need worry about licensing.
>
> - Final thought (ask terry about this): we could put our GOES
> radios back in, put on Omni's (maybe the ones we have would
> work) and maybe send the data to Boulder (the elevation angle
> is about 5 degrees here to GOES-west) and email status
> reports to the ship. One problem is that we don't currently
> have an access to a GOES-west channel, but i could probably
> arrange that later this fall.
>
> JM
>
A couple of observations in regards to your questions. Tom informed me
that the range to the PAM sites is about 2 miles. The path loss for 2
miles is quite low for what the Freewave radios are designed for, there
should be a SIGNIFICANT margin if the radios are line of sight and in
the 2 mile range. This would be true also if omni directional antenna's
were also used in lie of the yagi antenna's you are currently using.
I think there is some fundamental problem with the installation besides
the mast blocking the LOS from the antenna. Are the Freewave radios
outside in the cold temperatures or are they in a environmentally
controlled area at both ends to the RF link. To increase the power of
the radios would only have a small improvement in performance and
probably not noticeable, the max. power is 1 watt and I assume there
power level is close to that now. I would be surprised if the power can
be set greater than 1 watt due to FCC certification. Even though the
FCC does not govern your area, Freewave has no incentive to build radios
for that applications with higher power. The loss in the RG-213 can be
reduced by about half by using TIME coax, this again would be only a
small improvement.
The best option would be to go to separate antennas with the power
dividers which would certainly increase the loss of the system by 3.5 dB
for a two-way or 7 dB for a 4-way but if true blockage is your problem
then you are fighting a 20 dB problem.
I think your problem is more of severe blockage of the RF signal or the
Freeewave radios have a temperature problem. The other possibility is
that there is some other instrument which is causing interference or
generating noise in the 900 MHz band.
Let me know a few more details about the RF conditions and I will then
call Freewave to get there thoughts on the problem. Please correct me
if my assumptions are wrong.
Terry
P.S. Let's not yet think of using GOES transmitters yet.
- 47: RF_Communications, Site all, Fri 17-Oct-1997 04:24:58 GMT, Communications Problems discussion cont'
From militzer@spows.spo.ca Thu Oct 16 20:20:09 1997
From: John Militzer
Subject: Re: comm questions from John
To: hock@ucar.edu
Date: Thu, 16 Oct 1997 20:18:22 -0800 (AKDT)
Cc: horst@stout.atd.ucar.edu, militzer@spows.spo.ca (John Militzer)
Hi Terry,
> How's the weather?
Cold, now windy now, but it sure can be (really miserable in
25m/s at -15 or more...can't hardly wait until winter
arrives). We do have some icing on the sensors, etc. I'm
beginning to believe we should cover our omni's (on the remote
stations) with plastic/poly tube similar to what the
Coast-Guard did for our base station antenna. Any comments or
experience?
> I think there is some fundamental problem with the installation besides
> the mast blocking the LOS from the antenna. Are the Freewave radios
> outside in the cold temperatures or are they in a environmentally
> controlled area at both ends to the RF link.
The freewaves are inside the ship and inside the electronic's
box that is inside the insulated Thermal Generator (TEG) Box at the
stations. I've noted that the temps as reported by the
barometer also inside that electr. box have gone quite high,
as much as 40-50C. Since that, I removed some insulation from
the TEG boxes and the temps. have been closer to 25-30.
Yes I think that was a problem.
> A couple of observations in regards to your questions. Tom informed me
> that the range to the PAM sites is about 2 miles. The path loss for 2
> miles is quite low for what the Freewave radios are designed for, there
> should be a SIGNIFICANT margin if the radios are line of sight and in
> the 2 mile range. This would be true also if omni directional antenna's
> were also used in lie of the yagi antenna's you are currently using.
Note, we're using the 5db gain omni's on both ends.
I agree about the path-loss and margin, or at least that's
what i thought previously. One of the problems appears to be
ground plane. The ice doesn't conduct very well, so we're
stuck with the 4 prongs on the antenna alone. Here's an
interesting one: after moving the antenna on the ship, we got
some improvement in LOS for the area (which permitted us to
set up the 3rd site where the scientists wanted it, otherwise
it would have been directly behind the 10'dia.mast), but the
apparent problems with one station persisted. I went to that
station yesterday. All connections were OK, and I removed the
box insulation (noted below) to help reduce the temp in the
box. However I did notice that the sled's metal tow-bar was
in the upright position, seemingly in the path of the lower
1/4-1/3 of the antenna, so I lowered it out of the way. The
link with that station has definitely improved but it's still
not perfect (note, all of the data messages are making it to
the base). I'm thinking that maybe an improved ground plane
would help. That could maybe be alum. foil, or a plate
attached to the flat lid of the TEG box, or a jumper wire put
through a hole drilled in the ice to make it to seawater. The
second idea doesn't seem necessary, but the bouy folks here
do this commonly and have reported good noise reduction for
sensors at least using this technique. Any ideas.
> for that applications with higher power. The loss in the RG-213 can be
> reduced by about half by using TIME coax, this again would be only a
> small improvement.
>
The cable the Coast Guard used for the installation was along
the lines of TIME, and we used a short 15' section of 213 to
splice over to the new higher railing location for the
antenna.
This is working definitely better but we're on the main mast
where there's lots of other RF. I'll bring some photos back
to show you the installation.
> I think your problem is more of severe blockage of the RF signal or the
> Freeewave radios have a temperature problem. The other possibility is
> that there is some other instrument which is causing interference or
> generating noise in the 900 MHz band.
>
The elec. tech. who was here said their stuff in the 900 is
down (cellular, etc.)
> P.S. Let's not yet think of using GOES transmitters yet.
>
I tend to agree.
- 48: Hygrothermometer, Site 1, Sun 19-Oct-1997 00:50:46 GMT, Data rate on TRH set to 2 seconds
There are spikes on the TRH data. This occurs about
every 2 hours. It affects all data from the TRH.
At this point I have no idea why. So I decided to change the
data rate from the TRH to EVE, on station 1, to 2 seconds instead
of 1 second. After some time will check to see if we have any improvement.
- 49: Sonic, Site 4, Sun 19-Oct-1997 14:52:08 GMT, Sonic mounted at #4
Sonic 123 (?) was mounted at site 4 yesterday. The angle
of orientation was not taken and the sonic was not mounted
to its correct height. To date this site is being used
as a test site. The screws which hold the bottom plate of the sonic
to the mounting bracket were missing.
- 50: Logistics, Site 4, Sun 19-Oct-1997 14:55:57 GMT, New config at station 4, fmt0051
Since Gordon has gotten the software going two problems
have become apparent at all sites: (1) the TRH sensor has
a spike about every 2 hours, and (2) the compass data is not
being computed correctly. The compass problem appears to be
a scaling factor error. The TRH is unknown at this time.
A new configuration was downloaded last night at station 4
which was an attempt to correct both problems. Unfortunately
it did not work out.
We tried to configure the TRH as a serial sensor in broadcast
mode instead of the sensor bus mode since it is the only sensor
on the bus. EVE did not like the change and is rejecting data.
The sensor looks ok. Since the data is being rejected we can not
confirm if the compass correction is working.
- 51: Rad_System, Site 4, Sun 19-Oct-1997 20:46:43 GMT, 4-COMP fix at station 4
The Kipp-Zonen problems at station 4 have been fixed. The
incoming had its positive and negative signal lines reversed.
The outgoing appeared to be a connector problem. It started
working after we played with the connectors between the Kipp
and the 9 pin amp.
NOTE: This unit now has a ventilation fan with a 25ohm resistor
heater in the cone of the ventilator. Time will tell if this
approach works.
- 52: Visit_Log, Site 2, Mon 20-Oct-1997 05:27:16 GMT, Station 2 Visit: new config
Station 2 was visited 10/19 at about 14:30AKDT
The beacon was replaced
Configuration format 0050 with a new compass scaling, and increased
poll rate for the TRH was installed.
Data Downloaded.
TEG Vent plate re-installed to prevent snow/ice blowing into the box.
Trail Marking was improved.
4-Comp. system domes had a slight bit of ice which was removed.
Note the PYG's look like there is an open.
- 53: Rad_System, Site 2, Mon 20-Oct-1997 05:31:05 GMT, Station 2 PYG bad
The data from the PYG's on the 4-comp system appear bad.
From the signature, they're following the PSP values. This
can happen within the Campbell Mux. if a channel which
is being sampled has an open connection.....check for this
during the next visit.
- 54: Visit_Log, Site 1, Tue 21-Oct-1997 04:40:58 GMT, Station 1 visit, Atlanta
John lead the way out to station 1, Atlanta. We spent
time adding markers to the trail. At the site, a new configuration
was downloaded. Refer to message 57 for more information on the
new configuration.
- 55: Visit_Log, Site 3, Tue 21-Oct-1997 04:43:17 GMT, Visit to station 3, Baltimore
A first time trip to Baltimore, station 3. More
trail markers were added. A new configuration was
loaded at the site. Refer to message 57 for more information
on the new configuration.
- 56: Rad_System, Site 2, Tue 21-Oct-1997 04:45:38 GMT, Work on 4-comp at 2, Cleveland
Gordon and I went out to station 2 this afternoon to
work on the 4-component system. Based on what little
testing we could do, the interface from the pygs to the
10X is questionable. Decided to bring in the 4-component
unit to test in the room and install at station 4. So at
the moment station 2 does not have radiation data.
A new configuration was also loaded. Refer to message
57.
- 57: EVE, Site all, Tue 21-Oct-1997 04:53:21 GMT, New configuration
Over the last few days we have been trying to determine
the cause of the glitches on TRH data. We decided to try to
things: (1) increase the poll time from EVE to 5 secs, and (2)
add limit checks to the TRH data since the spikes seemed to be
very large values. The first item was based on a past test of
increasing the polling to 2 seconds which increased the time
period between spikes to 4 hours (1 second poll had a 2 hour
window). Also, a data file was collected last night from the
spare TRH unit. There were no bad data points when run at a
5 second sampling rate.
Stations 1 thru 3 have the new configuration. Station 4 still
has the 2 second sampling period with the limit check. If the
data looks good tomorrow morning, then station 4 will be re-
configured with a 5 second sample poll and no limit checks.
This may give us a clue as to the source of the problem.
- 58: Logistics, Site , Tue 21-Oct-1997 05:02:41 GMT, Freewave link in Nav room moved
The Frewwave link in the NAV room was sitting on a
power supply. It was mentioned to Gordon that the supply
was making a lot of noise the other night. He decided to
move it. This may help communication. We will monitor.
- 59: Rad_System, Site 2, Wed 22-Oct-1997 14:19:08 GMT, Replace CR10 at station 2
Time of visit about 22:00 GMT.
The 4-comp system was taken back to station 2 yesterday.
It checked out ok. There were 2 problems found: (1) the
CR10 was not multiplexing correctly and (2) the cables for
the PYGS needed to be reversed (end for end). The spare CR10
with the correct rom was mounted.
The heating fan from station 4 was moved out to 2. A new
heater will be added to the fan at station 4.
- 60: Rad_System, Site 4, Wed 22-Oct-1997 14:24:29 GMT, 4-comp ventilation fan removed from station 4
The 4-comp ventilation fan was removed so it could
be placed out at station 2. This took place at about
21:00 gmt.
- 61: Sonic, Site all, Wed 22-Oct-1997 14:43:35 GMT, Sonic flag counts up
The sonic flag counts started increasing at about
0:00 GMT. There was a sharp decrease in temperature,
from -10 C to -17 C, over a 3 hour period before the counts
went up.
- 62: Daily_Status, Site base, Wed 22-Oct-1997 15:00:54 GMT,
Weather: Partly cloudy, did get some sun today.
Base: running
STATIONS: Station 4 has not been properly deployed yet.
USE DATA WITH CAUTION!
TRH: looking ok except for spikes every 8 to 10 hours.
PRESS: ok
4-COMP: ok
station 2 has heater in ventilation system
Tsoil: ok
HFT: ok
SONICS: getting a heavy dosage of flag errors, variance up.
may be due to icing.
- 63: Sonic, Site all, Wed 22-Oct-1997 20:15:59 GMT, Sonic problem due to ice
The problem with the sonics appears to be related to icing.
Station 4 transducers were covered. After cleaning the signals
were ok.
- 64: Rad_System, Site 4, Wed 22-Oct-1997 20:19:29 GMT, Heat ventilator added to station 4
Built up another heating unit and added it to station 4.
I did some tests last night with the ventilator using the
Campbell and the spare Tsoil probe. There was a 5.5C temperature
difference between the intake air and the outlet air.
1/25/99 Changed Logbook entry type from Hygrothermometer to Rad. System
- 65: Rad_System, Site 2, Wed 22-Oct-1997 20:39:15 GMT, Dome temps at station 2 Questionable
The dome temps at station 2, Cleveland, have taken
a step change of about 15C. This happened at 10:00 GMT.
We may still have a problem with the Campbell or else the
heater unit is working overtime!
- 66: Logistics, Site 4, Thu 23-Oct-1997 01:20:02 GMT, Florida, station 4 moved
We moved station 4 about 100 yds to the east. It is now an operational
station and should not be used for testing without PI approval.
Still need angles for compass and sonic boom.
Numbers from Ed Andreas:
Sonic height: 3.48m
Height of aspirator on TRH: 1.73m
Compass orientation: 263deg (true north)
- 67: Sonic, Site all, Thu 23-Oct-1997 01:37:33 GMT, Sonics still iced up
Sonics are stilled iced up at stations 1 thru 3. We cleaned
off station 4 and it came back to normal operation.
- 68: Daily_Status, Site base, Thu 23-Oct-1997 14:03:50 GMT,
Weather: cold, partly clear, light wind
base: running
STATIONS: all stations reporting
TRH: looking ok except for spikes every 8 to 10 hours.
Temperatures dropping.
humidity going down. Station 4 humidity about 3% higher
than other sites.
PRESS: ok, on the rise.
4-COMP: Tdome.in and Tdome.out are too high at station 2.
Rpile.out at station 2 low at night compared to others
Tsoil: ok,
NOTE: Tsoil of station 4 buried yesterday
HFT: ok
NOTE: Gsoil of station 4 buried yesterday
SONICS: Ice conditions on sonics.
MISCELLANEOUS
LEVELS: ok
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
COMPASS: ok
New direction reading for station 4 is 263 (true N)
LOADS: ok
VOLTAGES: ok
TBOX: ok, all in the 30C to 40C
- 69: Logistics, Site 1, Fri 24-Oct-1997 14:15:36 GMT, Marked trail to station 1, Atlanta
Jeff, Tanell, nad UI went out to station 1 late yesterday.
We added additional trail markers.
- 70: LOG, Site 2, Fri 24-Oct-1997 14:17:42 GMT, A crack in the ice between here and station 2
A new lead has open up between here and station 2, Cleveland.
At this time we do not have any means of getting to the site
There may be a long way around but we do not know. The feedback
from experience ice people is do not worry about it. It will
probable close back up in a few days.
CAUTION!!!! Gordon and I had gone out there about 3 days ago with
no obvious sign of this happening. At least we did not know what
to look for.
- 71: Base_Software, Site base, Fri 24-Oct-1997 14:42:20 GMT, PAMPOLL down
PAMPOLL is down. There is no response over the net.
Data collection stopped at about 5:00 AM local time.
Reason: the ship's net connection was broken - the hub in the
officer's lounge fell off the wall.
- 72: Logistics, Site base, Fri 24-Oct-1997 14:58:09 GMT, Antenna cable check
The 200ft RF cable was put in series with the existing
cable to do a check. It appears to be ok; however, the additional
loss did effect communication with stations 2 and 3.
- 73: Hygrothermometer, Site 4, Fri 24-Oct-1997 15:05:15 GMT, No spikes in TRH from Florida, STAT4
There are no spikes in TRH from ststaion 4 since we
downloaded the new config. New configs will be downloaded
at all other sites as soon as possible.
- 74: Daily_Status, Site base, Fri 24-Oct-1997 15:51:31 GMT,
Weather:
base: pampoll donw!
STATIONS: all stations reporting up till pampoll went down
communication to 2 and 3 was weak over the last 24 hours
due to testing of antenna cable.
TRH: looking ok except for spikes every 8 to 10 hours.
Spikes on station 4 gone, serial config works!
RH ok.
PRESS: ok.
4-COMP: Tdome.in and Tdome.out high at station 2.
Tsoil: ok,
HFT: ok
SONICS: Ice conditions on sonics.
MISCELLANEOUS
LEVELS: ok
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
COMPASS: ok
LOADS: ok
VOLTAGES: ok
TBOX: ok, all in the 30C to 40C
- 75: propane, Site 1, Sat 25-Oct-1997 00:07:35 GMT, Atlanta visit
Gordon and I went to Atlanta this morning to replace the
propane tanks, download a new config, and replace the ram
disk. We tryed cleaning the sonic but it did not help.
The propane bottles were weighed when we got back. One
was 40 lbs the other was about 30 lbs.
- 76: Logistics, Site 3, Sat 25-Oct-1997 01:54:48 GMT, Possible move for Baltimore
Because of the crak n the airport runway a new site
has been selected for the airport. It will be near
Baltimore whic may mean we have to move the station. I
do not see a decision being made until the runway is in.
- 77: Daily_Status, Site base, Sat 25-Oct-1997 14:23:45 GMT,
Weather:
base: running
STATIONS: reporting, station 3 outages yesterday and this morning.
TRH: temperatures look good. Low last night was around -30C. Spikes
still on 2 and 3 since we have not downloaded a new configuration.
RH ok, going down
PRESS: ok, going down.
4-COMP: Tdome.in and Tdome.out high at station 2.
Pyrs responding to daytime period even with heavy icing.
Tsoil: ok, temperature highest at 1, maybe due to drifting snow there.
HFT: ok, heat flux lowest at 1, again maybe due to large drifts.
SONICS: Ice conditions on sonics.
MISCELLANEOUS
LEVELS: ok
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
COMPASS: ok
LOADS: TEG shutdown at station 3.
VOLTAGES: TEG shutdown at station 3, This happened on the 23rd at about
17:30 local.
TBOX: ok, temperature dropping at station 3, reaching ambient conditions.
- 78: Thermal_Generators, Site 3, Sat 25-Oct-1997 15:11:42 GMT, Baltimore TEG down
The TEG at Baltimore went down yesterday. At this time it is
unknown why it shut down. The battery voltage is dropping, approximately
1 volt in 48 hours. According to logbook entry 33, the station had
a full set of propane bottles on the 12th. We may be looking at a
maximum run of 12 days on propane. Station 2, Cleveland, should be monitored
closely since it is approaching this time window.
- 79: Sonic, Site all, Sat 25-Oct-1997 15:15:19 GMT, sonics
The sonics continue to be a problem. Even after cleaning with
a broom signals do not look good. There maybe a fine film of ice
covering the transducers. Maybe a spray bottle of isopropol alchol
would help.
- 80: propane, Site 3, Sat 25-Oct-1997 21:32:21 GMT, Propane bottles changed at station 3
The propane was changed about an hour ago. The TEG kicked
on after about 2 minutes. It took awhile for the system to
get fully operating. At one time there was a yellow flame
down in the exhaust. If the bottles were full on installation
then the typical operating period is about 12 days max.
Ed went with us and decided that the site was still good
even with the new airport out there.
- 81: Logistics, Site 2, Sat 25-Oct-1997 23:55:49 GMT, Attempt to station 2
Ed, Gordon, and I tried to get to station 2 this
afternoon. There was a possible place to cross the
lead and we hope to try it tomorrow.
- 82: Hygrothermometer, Site 3, Sun 26-Oct-1997 02:15:18 GMT, TRH was down, now up
The TRH was down at station 3 because we were not able to
reprogram it. The Rocky screen was useless. With the TEG running
the box should be warm enough by tomorrow for the Rocky.
UPDATE: Gordon was able to send fast commands over the freewave
link to Baltimore, station 3. This allowed us to reprogram the
TRH. It is now running.
- 83: Daily_Status, Site base, Sun 26-Oct-1997 14:29:40 GMT,
Weather: getting colder, partly clear skies
base: running
STATIONS: reporting, station 3 outages this morning.
TRH: temperatures look good
PRESS: ok, going down.
4-COMP: Tdome.in and Tdome.out high at station 2.
Pyrs responding to daytime period even with heavy icing.
Pyg.in at station 3 reading low. It appears to correspond
with ED cleaning the dooms when we were out there yesterday.
Tsoil: ok
HFT: ok
SONICS: Ice conditions on sonics.
MISCELLANEOUS
LEVELS: ok
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
COMPASS: ok
LOADS: ok
VOLTAGES: Voltages high at Atlanta, station 1. Up to 14 volts.
TBOX: ok
- 84: propane, Site 2, Mon 27-Oct-1997 01:42:12 GMT, visit to station 2, Cleveland
Went to station 2 today to work on the Tdomes, download the
new config, and change propane bottles.
Propane: We tried turning off both used bottles before switching
to the new ones. There was not enough propane left in the line and
the TEG went down. After putting the new bottles on the TEG started again
in about 2 minutes. The whole procedure took lest then 10 minutes.
Tdomes: Measured the voltage output on the Tdomes. They were higher
than expected so we put in the original logger box. The Tdomes came
back to normal readings.
The new config to correct the spiking on TRH was downloaded and the
TRH was reprogammed for interactive continuous mode.
- 85: EVE, Site 3, Mon 27-Oct-1997 02:24:54 GMT, Visit station 3, Baltimore, for RAM DISK
Jeff and I went to station 3 to get the RAM disk. We also spent
a fair amount of time coming back putting in stakes to flag the
road to the site.
- 86: Sonic, Site all, Mon 27-Oct-1997 02:26:51 GMT, Sonic problems
Teh sonic scontinue to ice up. Even after we clean them the
data looks bad. At station 3 today we tryed using an alcohol swap
to help remove ice in the transducers. Based on the time series
plots there was some improvement but it still looked bad. If this is
a continuing process we need to give some serious thought on how
to prevent it. A heat source would probable be the best thing.
Something we turn on every few hours for a short time.
- 87: Sonic, Site 4, Mon 27-Oct-1997 15:38:27 GMT, Sonic test
We ran a test last night with the sonic at station 4. We
replaced the sonic with the spare to see how long a clean sonic
would last and if the iced up sonic was still functional. The
clean sonic lasted about 1 hour! The old sonci worked fine. We
may try to setup a test bead on ship wit the sonic outdoors to
try and solve the icing problem.
- 88: Daily_Status, Site base, Mon 27-Oct-1997 15:40:58 GMT,
Weather:
base: running, common spike at about 22 local time last night
STATIONS: up and running
TRH: temperatures look good
Atlanta, station 1, Ts are not agreeing as well as other
sites. This maybe due to icing on the radiation tube.
Refer to comment 89.
PRESS: ok
4-COMP: Tdome and Tcase sensors looking good.
Pyg.out at ststion 2 is questionable when compared to others.
Tsoil: ok
HFT: ok
SONICS: Ice conditions on sonics.
MISCELLANEOUS
LEVELS: ok
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
COMPASS: ok
LOADS: ok
VOLTAGES: ok
TBOX: ok
- 89: Hygrothermometer, Site all, Mon 27-Oct-1997 18:10:07 GMT, TRH temperatures
At times the thermistor and platinum temperatures stray
from each other. When the iceing around the shield is cleaned
off the temps agree much better. The icing maybe the
reason. An example is day 26th at 10 to 11 am local at station
3. You can see an effect due to shield cleaning.
- 90: Logistics, Site base, Tue 28-Oct-1997 15:36:34 GMT, Base antenna moved
The base antenna was moved up the forward mast about another 20 ft.
Reception has improved.
- 91: Daily_Status, Site base, Tue 28-Oct-1997 15:37:45 GMT,
Weather:
base: running, communication much better with antenna at new location.
STATIONS: up and running
TRH: temperatures look good. It has warmed up about -20C.
PRESS: ok, dropping
4-COMP: Tdome and Tcase at Cleveland, station 2 are bad again. This
occurred at about 12:00 local yesterday.
PYGS are also bad again at station 2.This must be a
Campbell box problem.
PYRs at station 3 have an interesting spike at about 14:00
local time yesterday.
Tsoil: ok
HFT: ok
SONICS: Ice conditions on sonics.
MISCELLANEOUS
LEVELS: ok
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
COMPASS: ok
LOADS: ok
VOLTAGES: ok
TBOX: ok
- 92: Rad_System, Site 2, Wed 29-Oct-1997 01:19:29 GMT, Work on Tdomes at station 2, Cleveland
Jeff and I went out to station 2 this morning to remove the
Campbell. We brought it back to the ship to try and find
any problem with it. I decided to send it back out with the
rnet and licor channels shorted together since they were floating
and may have had an effect on the multiplexer relays. If this
works then we will do the same thing at all other sites. If it
dosn't work then I will reprogram the CR10X with a longer delay
after the relay switching.
- 93: Hygrothermometer, Site all, Wed 29-Oct-1997 01:24:30 GMT, TRH changes at 4 and 2
I started adding the set screws to the shield mount attaching
to the electronics housing on the TRH sensors. The spare sensor
was sent out to station 4 and station 4 sensor was sent to
station 2. Hopefully stations 1 and 3 will get done in the next
few days.
- 94: Daily_Status, Site base, Wed 29-Oct-1997 15:34:19 GMT,
Weather: Warming up, T at -13C
base: running
STATIONS: up and running
TRH: temperatures look good.
Florida temps not tracking as well.
PRESS: ok, dropping
4-COMP: Tdome and Tcase at Cleveland, station 2, starting to go bad again.
This time we are getting spikes. PYGS still tracking PYRS.
Tsoil: ok
HFT: ok
Baltimore tracks differently than others.
SONICS: Two sonics have come back to life! Cleveland and Florida are
looking good now. Chris believes the warmer temperatures has
allowed the rime ice to shed off.
MISCELLANEOUS
LEVELS: ok
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
COMPASS: ok
LOADS: ok
charging current at Baltimore is jumping around.
VOLTAGES: ok
Baltimore is jumping around, 13.3v to 13.7v.
TBOX: ok
- 95: Sonic, Site all, Wed 29-Oct-1997 16:26:51 GMT, Sonic behavior improving
The sonic response at stations 2 and 4 has improved to the point
where the data is believable. The temperatures have risen so the
icing may be shedding off. These sites have had their sonics cleaned
over the last few days while 1 and 3 have not. We will get to 1 and 3
today and clean the sonics.
- 96: Hygrothermometer, Site 4, Wed 29-Oct-1997 19:07:03 GMT, Wierd compass data from station 4
The compass at station 4 (florida) is reading -19.9, instead of the usual
221:
TRH007 -12.89 84.59 -13.06 -19.99 0 1
TRH007 -12.89 84.57 -13.06 -19.99 0 1
TRH007 -12.90 84.54 -13.06 -19.99 0 1
TRH007 -12.89 84.58 -13.06 -19.98 0 1
Eve does a (-1,360) limit check on this and so converts it to NA.
The NA's in the data started at 97 10 28 094730.000 AKST. Perhaps
this is when Steve put in the new TRH.
UPDATE: The problem was the settings for compoff in EE prom. The
value has to be at least 4 (I do not want to explain why at this time!).
The compass settings have been changed. Refer to entry 101 for more
information.
- 97: Hygrothermometer, Site 1, Wed 29-Oct-1997 21:44:12 GMT, Visit to Atlanta to change TRH
Jeff and I wen to Atlanta to change the TRH so that set
screws can be put into the coupler between the shield and
the electronics housing. All sensors were cleaned off.
Temperature and RH look fine. The compass heading has shifted
about 3 degrees to the North. This could be due to the
necessity of pulling the compass off one unit then mounting
it on the other.
- 98: Hygrothermometer, Site 3, Wed 29-Oct-1997 20:51:13 AKST, Visit to Baltimore, station 3
Gordon and I went to Baltimore to replace the TRH and
play with the TEG. Since the pressure setting on the TEG
to spec we did not try to re-adjust it. We did turn off the
automatic sparker by moving the palte which holds the switch
in.
- 99: Thermal_Generators, Site 3, Wed 29-Oct-1997 20:54:05 AKST, TEG at station 3, Baltimore
It appears that the auotmatic sparker had something
to do with the spiking we were getting on the TEG/Battery
voltage/current plots. It maybe the sparker was inducing
noise on the dc signals that were sampled.
- 100: Rad_System, Site 2, Wed 29-Oct-1997 20:56:06 AKST, Tdomes at Cleveland high again
The Tdomes at Cleveland have gone high again. This occurred
at about 17:00 local time. There was alot of spiking before
they made a final transaction top the high state. Based on this
response, the shorts across net rad and licor may have helped.
Our next test will be to reprogram the logger for a longer
delay time between relay changes.
NOTE: PYGS still tracking PYRS
- 101: Hygrothermometer, Site all, Wed 29-Oct-1997 21:21:05 AKST, Compass settings in TRH
The comapss on/off settings in all TRH are now set
the same. The on time is 10 minutes and the off is 4 seconds.
WARNING: The off time should not be set lower than this.
- 102: Daily_Status, Site base, Thu 30-Oct-1997 06:09:29 AKST,
Weather:
base: running
STATIONS: up and running.
TRH: temperatures look good, dropping. The temperature on the thermistor
is always low compared to platinum. The shield around the platinum
may have something to do with it.
PRESS: ok
4-COMP: Long and short look ok. Tdome and Tcase at Cleveland, station 2
are bad. PYGs at station 2 bad.
Logger down for about 2.5 hours from 16:00 to 18:30 local yesterday
at station 3, Baltimore.
Tsoil: ok
HFT: ok
Atlanta differnt from others today. Show drifts may be the answer.
SONICS: All looking good!
MISCELLANEOUS
LEVELS: ok
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
COMPASS: ok
LOADS: ok
Charging current at Atlanta higher than all the rest. 1.6 verse
1.2 amps.
VOLTAGES: ok
voltages lower at Cleveland and Florida due to heater in fan
TBOX: ok
- 103: propane, Site 4, Thu 30-Oct-1997 06:45:56 AKST, Station 4 (Florida) probably ran out of propane.
0300 AKST Florida TEG voltage started dropping steadily to 0V.
TEG/EVE box temperature dropped steadily over 3 hours to 0C.
- 104: Thermal_Generators, Site 4, Thu 30-Oct-1997 21:23:43 AKST, Station 4 TEG problems
Station 4 had TEG problems. It would not start period.
Even with the torch approach it would not work. I pulled
it out of the box and put it in a hut to warm up. After
supper, Jeff and I went back out to try to start it. Upon
inspection, we found a oily paste substance in the line from
the pressure regular/starter to the orifice to the burner.
The stuff was also in the air/fuel mixture space. After cleaning
it up and clearing out the orifice hole, we rebuilt it, put it
back in the box, nad started it up. It started right away. We
let it run for awhile to settle down. The pressure gauge was
jumping between 60 and 65 Kpa. The voltage output was around
3.5 volts. We decided to let it run the night and try to tune
it tomorrow.
The size of the orifice hole was hard to determine. If fact
the jumping in the pressure may have something to do with
how much of the hole was cleaned out. I sent an email to
John to talk to TEG about the orifice, the oily stuff, and to
get more orifices for backup. Also the butterfly valve from the
main line to the TEG was leaking when it was turned. John will
send up spares.
- 105: Sonic, Site all, Thu 30-Oct-1997 21:43:51 AKST, Sonic performance today
The sonics were well behaved until about 9:00 local time.
Florida and Atlanta started coming back to life at 22:00 local.
- 106: Daily_Status, Site base, Fri 31-Oct-1997 08:48:44 AKST,
Weather:
base: running
STATIONS: up and running.
TRH: ok
PRESS: ok
4-COMP: Cleveland pyrgeometer Rpile outputs tracking pyranometer outputs.
Also, Tdome outputs developed positive offset again.
Tsoil ok
HFT: ok
SONICS: ok
MISCELLANEOUS
Lead opened under ship last night.
LEVELS: ok
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
COMPASS: ok
LOADS: ok
VOLTAGES: ok
voltages lower at Cleveland and Florida due to heater in fan
TBOX: ok
- 107: Thermal_Generators, Site 4, Fri 31-Oct-1997 16:50:13 AKST, TEG at station 4
I spent the morning working on adjusting the output
of the TEG at station 4. It seems to be running fine.
It will be monitored over the next few days.
- 108: Rad_System, Site 2, Fri 31-Oct-1997 16:52:26 AKST, CAMPBELL and cable swap at station 2
Chris and I went out to station 2 to switch the
Campbell and the cables going to the PYGS. Based on
past test, this Campbell gave good PYG.raw data but
bad T.domes. The original Campbell was bad on both.
Hopefully the cable swap will help with the problem.
Time will tell.
NOTE: we had to cross 3 new leads to get to the site.
- 109: Rad_System, Site 2, Fri 31-Oct-1997 17:10:01 AKST, Tdomes have gone bad already at station 2!
NO COMMENT!
- 110: Rad_System, Site 4, Sat 01-Nov-1997 10:54:33 AKST, 4-comp at station 4 down, will be moved to station 2
The latest plan for station 2 is to move the campbell
and the 4-comp system fromstation 4 out to station 2.
The campbell will be reprogrammed to handle the new
coefficients fro Tsoil and HFT. Persently, we can go out
yet because of visibility.
- 111: Daily_Status, Site base, Sat 01-Nov-1997 10:57:17 AKST,
Weather: vey foggy, cold around -20C
base: running
STATIONS: up and running.
station 3 was having a hard time getting in early this morning
As of 8:00 LT the last packet received was 04:00 LT. We adjusted
the ships antenna this morning, and when we were done stn 3 was
up to date.
TRH: ok. Higher RH at Cle (due to leads?)
PRESS: ok
4-COMP: Cleveland pyrgeometer Rpile OK.
Tdome outputs developed positive offset again.
Other's OK.
Tsoil ok
HFT: ok
SONICS: ok
MISCELLANEOUS
Lead opened under ship last night.
LEVELS: ok
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
COMPASS: ok
LOADS: ok 1 amp at Cle&Fla,0.7 at Atl,Bal
VOLTAGES: ok
voltages lower at Cleveland and Florida due to heater in fan
TBOX: ok
- 112: Daily_Status, Site base, Mon 03-Nov-1997 09:22:10 AKST,
Weather: winds 2-5 m/s, temperature around -25 C, moatly clear
Base: running
STATIONS: up and running.
station 3 lost data around 1100 GMT
VOLTAGES/CURRENTS voltages ok. Turned on new double fan system at FLA
at about 2100. Current load increased from 0.6 to 0.9 a.
TRH: ok. Higher RH (2%) at Cle (due to leads?)
PRESS: ok
4-COMP: Cleveland pyrgeometer Rpile OK. FLA Rpile 10 W/m^2 lower early in day.
Tdome outputs positive offset remains.
Other's OK. Values seen wrong compared to main tower system. Suspect
domes are rimed. Cleveland rime brushed off at 2100 GMT; FLA
disconnected and brought inside to look for problems.
Tsoil ok
HFT: ok
SONICS: All giving poor values; suspect rime. Cleveland and Florida had ice
brushed off at 2100.
MISCELLANEOUS
LEVELS: ok
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
COMPASS: ok
TBOX: ok
- 113: Daily_Status, Site base, Tue 04-Nov-1997 12:31:02 AKST,
Weather: thick stratus clouds at about 0.8 km ASL, then clear
STATIONS: up and running.
two short gaps in station 3 data
VOLTAGES/CURRENTS voltages ok. Florida's load current dropped due to
removing 4-component and fan for diagnosis on board the ship.
TBOX: got a bit warm as the stratus passed over and the ambient air
temperatures rose.
TRH: ok. Warmer temperatures correspond to thick stratus passing over.
4-COMP: Atlanta and Baltimore domes probably rimed over. Gap in Florida data
due to bringing 4-component indoors for diagnosis.
PRESS: ok
T/GSOIL: ok
HFT: Sudden increase in Gsoil at Cleveland. Earlier in day had instructed
Jumper on how to clear instruments of rime if/when he
happened to be out at the PAM sites. He did this at Cleveland. He may have stepped on the snow over the flux plate.
Installation manual says to install temperature sensor over
flux plate. If this was done, why wasn't there a change in
Tsoil?
SONICS: Can see where Jumper cleaned rime off sonics about 0Z (11/4/97).
Rimed up again within a couple of hours.
MISCELLANEOUS
- 114: Daily_Status, Site base, Wed 05-Nov-1997 10:32:56 AKST,
Weather: sustained winds > 10m/s most of day. Cloud radar showed returns up to 5 km much of the day.
STATIONS: up and running.
Gaps in station 3 data due to transmission failure.
Gap in data for all 4 stations due to lost link between pam pc
and pampoll laptop. May not be a gap in data stored on pampoll
laptop. Should not be a gap in data on site flashcards.
VOLTAGES/CURRENTS: ok
TBOX: ok
TRH: ok.
4-COMP: Did more testing on Florida's 4-component. Tried disconnecting one or
more radiometers at a time to see possible influence on pyg dome
temperatures. Found that with pyg.in disconnected, other 3
radiometers gave good output. When pyg.in cable is reconnected, both
pyg dome temperatures develop a positive offset. Asking NCAR folks
for permission to open pyg.in and inspect wiring.
PRESS: ok
TSOIL: ok
HFT: Gsoil output from Cleveland more variable than other sites. Possibly
due to footprint near sensor causing greater influence from varying
air temperature.
SONICS: High winds and warmer temperatures cleaned frost off sonics.
MISCELLANEOUS
- 115: Daily_Status, Site base, Thu 06-Nov-1997 08:27:38 AKST,
Weather: overcast, thin stratus.
STATIONS: up and running.
"Visited" Florida. Light snow cleaned off domes, on downwind side.
No frost on sonic. Fresh layer of snow all around; no
footprints from previous visits. Changed propane. Old
tank weighed 35#, so still had 12.5# of propane in it.
Chose not to change flash card this time.
Visited Atlanta. Light snow cleaned off domes. Fresh layer of snow
all around; no footprints. Changed propane and flash card.
Old tanks weighed 25 and 42 #s, so still had 22# of propane.
No frost on sonic thanks to recent storm/wind.
Intended to visit Baltimore and possibly Cleveland tomorrow, but
a large lead opened up near the ship. The trail to
Baltimore includes 300' of water/slush. The trail to
Cleveland hasn't been checked all the way, but the view from
the bridge shows it may well be inaccessible as well.
VOLTAGES/CURRENTS: ok
TBOX: ok Interesting how box temps vary between sites.
TRH: ok. Cleveland temps don't follow quite the pattern the other 3 sites do.
During Atlanta site visit, Chris Fairall placed Vaisala
handheld temperature/humidity sensor that ETL uses as an
intercomparison standard near intake of TRH. At 22:40 he
read -14.1C, and 84% relative humidity.
4-COMP: pyg.in still disconnected at Florida. ~22:00gmt, replaced pyg.out
cable with pyg.in cable to test pyg.in cable. ~02:00gmt,
transfered pyg.out cable to pyg.in bulkhead connector on
CSI black box.
Not concerned with levels on Florida's 4-component until pyg problem
is solved. Level cable remains unattached.
PRESS: ok
TSOIL: ok
HFT: Gsoil at Baltimore shows much more variation today than before. Could
storm have scoured some of its snow cover away?
SONICS: ok!
MISCELLANEOUS
- 116: Daily_Status, Site base, Fri 07-Nov-1997 13:33:45 AKST,
Weather: light winds, low, variable stratus.
STATIONS: up and running.
Visited Cleveland. Very light frost on sonic, mostly on frame and arms, not heads. Brushed most of it off with a feather
duster. Residue remained. Used (initially) warm fingers
to melt and wipe off frost/water.
Changed propane and flashcard. Returned propane tanks
weighed 32# and 52#. 52# tank will not be refilled!
Had to cross new lead (not the 300' wide one), that was 6-8'
wide in most places. Followed it for ~1/4 mile to find good
crossing.
VOLTAGES/CURRENTS: ok
TBOX: ok
TRH: ok. Noticed temporary increase in RH at Atlanta compared to other
sites. THEN heard a lead opened up between the ship and
the Atlanta site. Wahoo!
4-COMP: Made additional tests on 4-component in-situ at Florida. Will study
result later tonight.
PRESS: ok
TSOIL: ok Tsoil at Atlanta very stable compared to others. Explains near
constant and low heat flux noted below.
GSOIL: Gsoil at Cleveland seems to have recovered from possible footprint near
or on it. Recent storm probably blew in fresh snow cover. Atlanta
Gsoil, though, looks nearly flat compared to other 3 sites.
SONICS: As noted above, thoroughly cleaned all frost off sonic heads at
Cleveland. Good data for all of an hour before they started riming
again. Other sites rimed up as well.
MISCELLANEOUS
- 117: Daily_Status, Site base, Sat 08-Nov-1997 09:44:25 AKST,
Weather:
STATIONS: up and running.
George (SHEBA staff) investigated the route to Baltimore. Impossible.
VOLTAGES/CURRENTS: ok
TBOX: Dips in box temperatures at Cleveland and Florida due to lid being
open for maintenance. Atlanta box temperature approaching 45C. Over
past week, box temperatures at sited have ranged from 15-45C.
TRH: ok
4-COMP: Brought in Florida's 4-component and Campbell box for diagnosis. It
worked fine indoors. Took it to met hut where I could test it again
with the 4-component and Campbell box outside in the cold. Still
worked find. Took it to Florida and reinstalled it. It continued to
work fine. Don't know what made the difference nor how long it will
continue to work.
Installed fan with 4 independent outlets and a resistor
heater.
LEVELS: Florida's level remains disconnected until we're done with repairs.
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: frosted up
MISCELLANEOUS
- 118: Daily_Status, Site base, Sun 09-Nov-1997 08:41:10 AKST,
Weather:
STATIONS: up and running. Some RF link dropouts on Cleveland/Baltimore.
Nothing new on the route to Baltimore.
VOLTAGES/CURRENTS: ok. Higher current at Florida due to installation of 2nd
experimental fan. Jeff determined this fan warms the air about 1C.
Tubing connecting fan to radiometers was insulated with fiberglass
pipe wrap.
TBOX: Dips in box temperature at Florida due to lid being
open for maintenance.
TRH: ok
4-COMP: Atlanta, Cleveland, and Baltimore obviously invalidated by rime.
Numbers from Florida implyh that fan with 4 independent outlets and
a resistor heater is keeping rime off. Data from Florida went bad at
about 0700 GMT, following usual pattern of delayed failure. Note
that this occurred when air temperature went below -16 C, but doubt
significance.
LEVELS: Florida's level remains disconnected until we're done with repairs.
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
PRESS: ok
TSOIL: ok
GSOIL: ok. Note pattern at Atlanta remains clearly different from others.
SONICS: frosted up; no valid data
MISCELLANEOUS
- 119: Daily_Status, Site base, Mon 10-Nov-1997 08:23:41 AKST,
Weather: Winds decreasing after a storm. Cloudy, temperature about -12 C.
STATIONS: up and running. Some RF link dropouts on Baltimore.
Nothing new on the route to Baltimore.
VOLTAGES/CURRENTS: ok. Higher current at Florida due to installation of 2nd
experimental fan.
TBOX: ok. All around 20 C.
TRH: ok
4-COMP: Atlanta, Cleveland, and Baltimore obviously invalidated by rime.
Florida ok. Heat source (light bulb) in Campbell box to keep the
multiplexer working.
LEVELS: Florida's level remains disconnected until we're done with repairs.
NOTE: Baltimore levels should not be trusted at this time.
The unit was levelled with a bubble.
PRESS: ok
TSOIL: ok
GSOIL: ok. Note pattern at Atlanta remains clearly different from others.
SONICS: Cleveland, Baltimore, Atlanta frosted up; no valid data; Florida ok.
MISCELLANEOUS
- 120: Daily_Status, Site base, Tue 11-Nov-1997 18:51:36 AKST,
Weather: Winds 7-10 m/s; fairly good snow fall near end of day.
STATIONS: up and running. Some RF link dropouts on Baltimore.
Changed propane at Baltimore; went via Cleveland and Bermuda.
VOLTAGES/CURRENTS: ok. Voltage dropped to 13.2 at Baltimore after changing
propane and adding new fan with heater. Higher current at Baltimore
due to new fan.
TBOX: ok.
TRH: ok Warming most of day.Strange drop at Florida from 1700-2200 GMT.
4-COMP: Atlanta, Cleveland, and Baltimore obviously invalidated by rime.
Florida ok. Cleaned Cleveland and Baltimore; put new fan on Bal.
Looks like Baltimore rad. data quit about the time we left.
LEVELS: Florida's level remains disconnected until we're done with repairs.
Took serial number from Baltimore levels: N2019.
PRESS: ok
TSOIL: ok, except Baltimore quit.
GSOIL: ok. except Baltimore quit.
SONICS: All sonics began working about 2000 GMT; Florida ok all day.
MISCELLANEOUS Looks like Campbell datalogger at Baltimore quit about the time
we left.
- 121: Daily_Status, Site base, Wed 12-Nov-1997 08:11:42 AKST,
Weather: Winds shifted from SE at 10 m/s to SW at 7 m/s. Some clearing;
temperatures dropping.
STATIONS: up and running. Some RF link dropouts on Baltimore.
VOLTAGES/CURRENTS: ok. Voltage dropped to 13.2 at Baltimore after changing
propane and adding new fan with heater. Note recent decrease in
charging current at Baltimore. Not sure of significance.
TBOX: Atlanta running about 20 C higher than other; suspect snow drifts.
TRH: ok
4-COMP: All stations ok except Baltimore, where the Campbell isn't reporting
data.
LEVELS: Florida's level remains disconnected.
PRESS: ok
TSOIL: ok, except Baltimore quit.
GSOIL: ok. except Baltimore quit.
SONICS: All sonics began working about 2000 GMT on 10/11; Florida ok all day.
MISCELLANEOUS Campbell datalogger at Baltimore still out.
- 122: Daily_Status, Site base, Thu 13-Nov-1997 15:43:02 AKST,
Weather: Winds light; SW at 7 m/s. Mostly clear; temperatures dropping.
STATIONS: up and running. One brief RF link dropout on Baltimore.
VOLTAGES/CURRENTS: ok. Voltage dropped to 13.2 at Atlanta after adding new fan
with heater; current jumped to about 1.1 amp.
TBOX: Big drop at Atlanta because we had the box open for about an hour
starting at 2200 GMT 11/13. The box was partly drifted in and some of
the ventilation holes were clogged with snow.
TRH: ok
4-COMP: Baltimore Campbell still isn't reporting data. Florida Campbell
multiplexer started acting up about 2200 GMT 11/13. Will turn up the
juice on the light bulb in the box.
LEVELS: Florida's level remains disconnected.
PRESS: ok
TSOIL: ok, except Baltimore.
GSOIL: ok. except Baltimore.
SONICS: All sonics ok all day.
MISCELLANEOUS Campbell datalogger at Baltimore still out. Visited Atlanta
2200-2300 GMT 11/13 to clear snow and install new fan/heater on rad-
iation sensors.
- 123: Daily_Status, Site base, Fri 14-Nov-1997 08:17:25 AKST,
Weather: Winds light; SW at 7 m/s. Mostly clear; temperatures dropping.
STATIONS: up and running.
"Visited" Florida. Changed propane, brushed off frost, added
ventilation fan beneath TEG cooling fins ~20:00gmt. Replaced
original sonic, replaced level cable and leveled 4-component,
changed flash card, and cleaned frost from TEG box ventilation
holes, in afternoon, finishing ~00:30gmt (11/15).
VOLTAGES/CURRENTS: ok.
TBOX: Atlanta recovered from yesterdays activity; now only slightly warmer
than other three stations.
TRH: ok
4-COMP: Baltimore Campbell still isn't reporting data. Florida Campbell
multiplexer started acting up about 2200 GMT 11/13, as evidenced by
sudden shift in Tdome readings. Turned up the juice on the light bulb
in the box. Values recovered about 1/2 hr later (0400 GMT 11/14).
Note Atlanta and Florida Tdome/Tcase slightly elevated by new fan system. Turned off light bulg heater at 2200gmt 11/14 and waiting for Tdome
problem to reoccur so can test affects of adding delays to multiplexer
relays.
LEVELS: Leveled Florida's 4-component after replacing cable.
PRESS: ok
TSOIL: ok, except Baltimore.
GSOIL: ok. except Baltimore.
SONICS: All sonics show bad data between 0400-1000 GMT 11/14. Probably due to
rime ice. Replaced Florida's sonic with original ~23:00gmt.
MISCELLANEOUS Campbell datalogger at Baltimore still out.
- 124: Daily_Status, Site base, Tue 25-Nov-1997 10:14:18 AKST,
Daily_Status entries for 11/15/97-11/20/97. "shutdown" of shebop pc caused
loss of entries for 11/15-11/24. These entries had been copied and sent to
UCAR so could be retrieved.
==========================================================================
Project: SHEBA LOGBOOK ENTRIES
Message TYPES: all, SITE: all
==========================================================================
Number: 124 By: Jeff Otten
Written: Sat 15-Nov-1997 (JD319) 12:36:48 AKST
Type: Daily_Status
Site: base
Title:
--------------------------------------------------------------------------
Weather: Winds light. Mostly clear.
STATIONS: up and running.
Removed TEG gas cutoff valve plate. TEG stayed running.
VOLTAGES/CURRENTS: ok.
TBOX: ok.
TRH: ok
4-COMP: Baltimore Campbell still isn't reporting data. Cleveland domes
probably frosted. Florida's Tdomes off again. Lightbulb heater in
electronics box is still off from last night's test of adding delays
to CR10X program. Changing delay from 10 to 50 ms made no difference.
Changing delay from 50 to 250 ms worked for only 35 minutes before
offset came back again.
Changed delays back to 10ms at 11/15, 22:03gmt.
LEVELS: ok, Baltimore not reporting.
PRESS: ok
TSOIL: ok, except Baltimore.
GSOIL: ok. except Baltimore.
SONICS: frosted, except Florida.
MISCELLANEOUS Campbell datalogger at Baltimore still out.
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Number: 125 By: Chris Fairall
Written: Sun 16-Nov-1997 (JD320) 08:40:28 AKST
Type: Daily_Status
Site: base
Title:
--------------------------------------------------------------------------
Weather: Winds light. Mostly clear. Temperatures around -30 C last 12 hrs.
STATIONS: up and running. Turned on strobes at 2200 GMT 11/15. Eyeball
confirmation of all but Baltimore (suspect Baltimore may not be on).
VOLTAGES/CURRENTS: ok. Significant drop at Atlanta at 2200 GMT 11/15; seems to
be related to turning on the strobes. Much samller blips at Cleveland
and Florida.
TBOX: ok.
TRH: ok
4-COMP: Baltimore Campbell still isn't reporting data. Cleveland domes
probably frosted. Florida's Tdomes off again. Lightbulb heater in
electronics box turned back on about 0100 GMT 11/16 but to no avail.
May have to up the voltage at these cold temperatures.
LEVELS: ok, Baltimore not reporting.
PRESS: ok
TSOIL: ok, except Baltimore.
GSOIL: ok. except Baltimore.
SONICS: All sonics frosted all day, except Florida which was clear until 1000
GMT 11/16.
MISCELLANEOUS Campbell datalogger at Baltimore still out.
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Number: 126 By: Jeff Otten
Written: Mon 17-Nov-1997 (JD321) 07:41:38 AKST
Type: Daily_Status
Site: base
Title:
--------------------------------------------------------------------------
Weather:
STATIONS: up and running.
Turned all 4 beacons off 11/17 ~17:30gmt.
VOLTAGES/CURRENTS: Baltimore voltages slowly dropping.
TBOX: ok.
TRH: ok
4-COMP: Baltimore Campbell still isn't reporting data. Cleveland domes
probably frosted. Florida's Tdomes on and off.
LEVELS: ok, Baltimore not reporting.
PRESS: ok
TSOIL: ok, except Baltimore.
GSOIL: ok. except Baltimore.
SONICS: frosty
MISCELLANEOUS Campbell datalogger at Baltimore still out.
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Number: 127 By: Jeff Otten
Written: Tue 18-Nov-1997 (JD322) 12:45:34 AKST
Type: Daily_Status
Site: base
Title:
--------------------------------------------------------------------------
Weather: clear and cold, auroras last night
STATIONS: up and running.
Visited Atlanta 11/18 ~1900. Changed propane and flashcard.
Pyg domes rimed. TRH inlet completely rimed over. Sonic full of
rime. All instruments cleaned. Installed ventilation fan beneath
TEG cooling fins, pointing up.
VOLTAGES/CURRENTS: ok
TBOX: ok. Atlanta box temp dropped due to visit.
TRH: ok Atlanta TRH inlet completely occluded with rime.
4-COMP: Baltimore Campbell still isn't reporting data. Atlanta pyg domes
were frosted. Data indicates all others frosted as well. Florida's
Tdomes on and off. Will increase voltage on light to 100%.
LEVELS: ok, Baltimore not reporting.
PRESS: ok
TSOIL: ok, except Baltimore.
GSOIL: ok. except Baltimore.
SONICS: frosty, cleaned Atlanta sonic but it frosted right back up
MISCELLANEOUS Campbell datalogger at Baltimore still out.
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Number: 128 By: Chris Fairall
Written: Wed 19-Nov-1997 (JD323) 14:26:07 AKST
Type: Daily_Status
Site: base
Title:
--------------------------------------------------------------------------
Weather: clear and cold, auroras last night. Warming trend towards end of day.
STATIONS: up and running. Much of Baltimore missing.
Visited Cleveland 11/19 ~1900 GMT. Changed propane and flashcard.
Pyg domes rimed. TRH inlet completely rimed over. Sonic full of
rime. All instruments cleaned. Installed 4-port radiometer fan.
VOLTAGES/CURRENTS: ok. Voltage drop at Cleveland due to new radiometer fan.
All iloads about 1.1 amp';icharge about 1.4 amp.
TBOX: ok. Cleveland box temp dropped 1830 GMT due to visit.
TRH: ok Cleveland TRH inlet completely occluded with rime.
4-COMP: Baltimore Campbell still isn't reporting data. Cleveland pyg domes
were frosted. Data indicates all others frosted as well. Cleveland`s
ok after 1900 GMT 11/19. Florida's Tdomes ok after increasing
voltage on light to 100%.
LEVELS: ok, Baltimore not reporting.
PRESS: ok
TSOIL: ok, except Baltimore. Cleveland Tsoil relocated and flagged. Value did
not change very much.
GSOIL: ok. except Baltimore. Cleveland Gsoil relocated and flagged. Value
changed about 5 W/m^2 but still decaying.
SONICS: frosty, cleaned Cleveland sonic but even the hot finger massage did
not completely clean up the siganl. Will revisit Florida and try
again.
MISCELLANEOUS Campbell datalogger at Baltimore still out.
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Number: 129 By: Jeff Otten
Written: Thu 20-Nov-1997 (JD324) 08:48:51 AKST
Type: Daily_Status
Site: base
Title:
--------------------------------------------------------------------------
Polar bear sighted at runway this afternoon.
Weather: mostly clear, some stratus mostly toward horizon
STATIONS: up and running. Much of Baltimore missing.
VOLTAGES/CURRENTS: Load current at Cleveland went up when the 4-port
radiometer ventilation fan was installed. 16 hours later, it
dropped back down. At the same time, pyg.out Rpile, Tcase and Tdome
values went bad.
TBOX: ok.
TRH: ok
4-COMP: Baltimore Campbell still isn't reporting data.
LEVELS: ok, Baltimore not reporting.
PRESS: ok
TSOIL: ok, except Baltimore. Cleveland Tsoil about where it was before
moving the sensor yesterday.
GSOIL: ok. except Baltimore. Cleveland Gsoil higher than before relocating
sensor due to different snow cover. New snow cover much less compact
than old cover.
SONICS:
MISCELLANEOUS Campbell datalogger at Baltimore still out.
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
- 125: Daily_Status, Site base, Tue 25-Nov-1997 10:25:44 AKST,
A "shutdown" of the shebop pc caused the logbook entries for 11/15/97-11/24/97
to be lost from the logbook. Entries for 11/15-11/20 were recovered from an
email copy and re-stored in the logbook as entry #124. Entries for 11/21-11/24
are not recoverable, but contained little besides routine comments. The one
exception is that on 11/22, Florida's propane tank was changed.
Coincidentally, it had run out of propane one hour earlier, having used up
its propane at a rate slightly higher than before. (Or possibly the zero on
the scale had been bumped and the propane weight was wrong.) The TEG was
still warm and started right up.
Weather:
STATIONS: up and running.
VOLTAGES/CURRENTS: ok.
TBOX: ok
TRH: Cleveland's TRH still not responding. (It stopped 16 hours after
the previous site visit at the same time that the 4-port fan
stopped running and all pyg.out data went bad.)
4-COMP: Baltimore Campbell still isn't reporting data. Frost cleaned off
Florida's radiometers 11/25 ~19:15.
LEVELS: ok
PRESS: ok
TSOIL: ok, except Baltimore.
GSOIL: ok. except Baltimore.
SONICS: frost problems. Florida sonic was cleaned 11/24 ~22:15. Also at
11/25 ~19:15.
MISCELLANEOUS Campbell datalogger at Baltimore still out.
- 126: Daily_Status, Site base, Wed 26-Nov-1997 08:18:17 AKST,
Weather:
STATIONS: up and running.
VOLTAGES/CURRENTS: ok.
TBOX: ok
TRH: Cleveland's TRH still not responding.
4-COMP: Baltimore Campbell still isn't reporting data. Cleveland pyg.out
data still bad.
LEVELS: ok. Baltimore not reporting.
PRESS: ok
TSOIL: ok. Baltimore not reporting.
GSOIL: ok. Baltimore not reporting.
SONICS: frost clearing off.
MISCELLANEOUS Campbell datalogger at Baltimore still out.
- 127: Daily_Status, Site base, Thu 27-Nov-1997 09:20:57 AKST,
Weather:
STATIONS: up and running.
VOLTAGES/CURRENTS: Baltimore TEG current dropped to 0. Must be out of propane.
TBOX: ok
TRH: Cleveland's TRH still not responding.
4-COMP: Baltimore Campbell still isn't reporting data. Cleveland pyg.out
data still bad.
LEVELS: ok. Baltimore not reporting.
PRESS: ok
TSOIL: ok. Baltimore not reporting.
GSOIL: ok. Baltimore not reporting.
SONICS: frost problems. Florida better than others.
MISCELLANEOUS Campbell datalogger at Baltimore still out.
- 128: Daily_Status, Site base, Fri 28-Nov-1997 09:45:09 AKST,
Weather:
STATIONS: up and running except for Baltimore
VOLTAGES/CURRENTS: Baltimore TEG current dropped to 0 yesterday and load current (batteries) dropped out at 2000 Z indicating station is down now.
TBOX: ok
TRH: Cleveland's TRH still not responding.
4-COMP: Cleveland pyg.out data still bad.
LEVELS: ok. Baltimore not reporting.
PRESS: ok Baltimore not reporting
TSOIL: ok. Baltimore not reporting.
GSOIL: ok. Baltimore not reporting.
SONICS: some frost problems. Florida better than others, cleaned off FLA last night.
MISCELLANEOUS
- 129: Daily_Status, Site base, Sat 29-Nov-1997 10:46:51 AKST,
Weather: Breezy and cold and dark
STATIONS: all stations are up and running except for Baltimore
VOLTAGES/CURRENTS: ATL and FLA look ok, CLE looks flaky as did before
TBOX: ok
TRH: CLE TRH still not responding, FLA and ATL ok.
4-COMP: CLE flaky as before, FLA and ATL ok.
LEVELS: ok
PRESS: ok and all (3) tracking
TSOIL: ok
GSOIL: ok
SONICS: spiky returns from 2000 Z(JD#332) thru 0800 Z(JD#333) then smoothed out until present report on CLE and FLA. ATL looks good entire time w/ exception of first 2 hrs. Cleaned sonics on FLA at 2300 Z (332)
MISCELLANEOUS
- 130: Daily_Status, Site base, Sun 30-Nov-1997 09:55:19 AKST,
Weather: Small squall went thru last night; made it warmer, windy, and snowy. This morning temps dropping and winds calmer.
STATIONS: all stations are up and running except for Baltimore
VOLTAGES/CURRENTS: ATL and CLE look ok, teg voltages on FLA dropped to 0 at 0400 UTC (JD#334) and batteries have taken over.
TBOX: ok
TRH: CLE TRH still not responding, FLA and ATL ok.
4-COMP: CLE Rpile.out flaky as before, FLA and ATL ok.
LEVELS: ok, note short/temporary spike on CLE
PRESS: ok and all (3) tracking
TSOIL: ok
GSOIL: ok
SONICS: FLA looks ok, CLE and ATL a bit noisy starting ~0900 UTC.
MISCELLANEOUS
- 131: Daily_Status, Site base, Mon 01-Dec-1997 10:45:15 AKST,
Weather: Temps dropping, skies clear.
STATIONS: all stations are up and running except for Baltimore
VOLTAGES/CURRENTS: ATL, FLA, and CLE ok, propane filled and nozzle cleaned at FLA ~ 2300 Z yesterday.
TBOX: all ok
TRH: CLE TRH still not reporting, FLA and ATL ok.
4-COMP: CLE Rpile.out flaky as before, FLA and ATL ok.
LEVELS: all ok
PRESS: all ok
TSOIL: all ok
GSOIL: all ok
SONICS: FLA and CLE a little spiky but ok, ATL not reporting after 0700 Z.
MISCELLANEOUS
- 132: Daily_Status, Site base, Tue 02-Dec-1997 11:30:57 AKST,
Weather: Temps rising and very windy.
STATIONS: all stations are up and running except for Baltimore
VOLTAGES/CURRENTS: ATL and CLE ok. FLA voltages low as well as charging current down from 1.75 to 1.4
TBOX: ATL and CLE ok. Temp on FLA lower than before propane fill and lower than other stations by ~10 C.
TRH: CLE TRH still not reporting, FLA and ATL ok.
4-COMP: CLE Rpile.out flaky as before, ATL ok. FLA Tdome lower than normal due most likely to multiplexer box flakiness.
LEVELS: all ok
PRESS: all ok
TSOIL: all ok
GSOIL: all ok
SONICS: FLA ok. CLE and ATL has some spikiness.
MISCELLANEOUS
- 133: Daily_Status, Site base, Wed 03-Dec-1997 09:29:31 AKST,
Weather: Temps dropping and very windy.
STATIONS: all stations are up and running except for Baltimore
VOLTAGES/CURRENTS: Florida voltage had been dropping slowly to about 12V.
Replaced burner nozzle 12/2 ~23:00. Charging current came back up.
Voltages came up very slowly and are still slowly rising at 12/3 18:30.
Disconnected 4-comp fan/heater 12/2 ~23:00 to allow batteries to
charge more quickly.
TBOX: Florida box temperature colder than others. Cleaned, but perhaps
still partially clogged nozzle used on 12/2 may have caused lower
than normal box temp. 35 knot winds are penetrating Florida's
louvers slightly as evidenced by snow inside box.
TRH: CLE TRH still not reporting, FLA and ATL ok.
4-COMP: CLE pyg.out data still bad. FLA multiplexer had problems on the
pyg.out Tdome and Tcase. VariAC connected to lightbulb heater was
turned up and the T's returned to normal 12/3 ~12:00gmt.
LEVELS: ok
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: Atlanta frosted.
MISCELLANEOUS
- 134: Daily_Status, Site base, Thu 04-Dec-1997 09:57:16 AKST,
Weather: clear
STATIONS: all stations are up and running except for Baltimore
VOLTAGES/CURRENTS: voltages on FLA have been climbing. ATL and CLE ok
CLE current lower since it's load is less (no T/RH, fans)
TBOX: TRH: CLE TRH still not reporting, FLA and ATL ok.
4-COMP: pyg.out still out at CLE
LEVELS: FLA y-level is at 0.325(?) the rest at CLE,ATL, and FLA are between +/- 0.1 mostly.
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: All showing signs of frosting today
MISCELLANEOUS
- 135: Daily_Status, Site base, Fri 05-Dec-1997 12:58:23 AKST,
Weather:
STATIONS: all stations are up and running except for Baltimore
VOLTAGES/CURRENTS: ATL teg voltages spiky ~ 13.4, FLA steady ay 13, CLE ok
TBOX: TRH: CLE TRH still not reporting, Tboxes all ok
4-COMP: pyg.out still out at CLE, ATL amd CLE ok
LEVELS: same as previous reports
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: FLA looks good, ATL amd CLE may be a little frosty
MISCELLANEOUS Jeff went out to ATL yesterday, filled propane, maintenance checks, etc.
- 136: Daily_Status, Site base, Sat 06-Dec-1997 10:41:56 AKST,
Weather: very windy
STATIONS: all stations are up and running except for Baltimore
VOLTAGES/CURRENTS: same as previous entry
TBOX: TRH: CLE TRH still not reporting, Tboxes all ok
4-COMP: pyg.out still out at CLE, ATL amd CLE ok
LEVELS: same as previous reports
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: with windy conds all look good
MISCELLANEOUS
- 137: Daily_Status, Site base, Sun 07-Dec-1997 11:07:19 AKST,
Weather: very windy conditions continue
STATIONS: all stations are up and running except for Baltimore
VOLTAGES/CURRENTS: CLE teg out of propane last night, batteries have taken over. ATL and FLA ok
TBOX: CLE Tbox down accordingly, ATL and FLA ok.
TRH: CLE TRH still not reporting.
4-COMP: pyg.out still out at CLE, ATL and FLA ok
LEVELS: same as previous reports
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: with windy conds all look good
MISCELLANEOUS
- 138: Daily_Status, Site base, Mon 08-Dec-1997 09:33:54 AKST,
Weather: windy conditions continue
STATIONS: all stations are up and running except for Baltimore
VOLTAGES/CURRENTS: CLE teg out of propane, still operating on batteries. ATL and FLA ok
TBOX: CLE Tbox down accordingly, ATL and FLA ok.
TRH: CLE TRH still not reporting.
4-COMP: pyg.out still out at CLE, ATL and FLA ok
LEVELS: same as previous reports
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: with windy conds all look good
MISCELLANEOUS
- 139: Daily_Status, Site base, Tue 09-Dec-1997 20:21:48 AKST,
Weather: winds diminishing, clear
STATIONS: Atlanta and Florida up and running. Baltimore still down.
Cleveland batteries ran out at 12/10 ~04:00gmt.
VOLTAGES/CURRENTS: Cleveland batteries ran out at 12/10 ~04:00.
Baltimore still down.
Florida ran out of propane 12/9 ~07:00gmt. Propane changed and
restarted 12/9 ~20:00gmt. Batteries kept system running well.
TBOX: CLE Tbox down accordingly, ATL and FLA ok. Florida box temp
dropped at 12/10 ~04:15gmt due to changing of flashcard and
removing TEG valve plate.
TRH: Atlanta shows increased RH at 12/10 02:00gmt. Lead nearby?
4-COMP: ATL and FLA ok
Replaced multiplexer at Florida 12/10 ~01:30gmt. Discovered and
tightened loose cable on pyg.in at 12/10 ~04:15gmt.
LEVELS: ok
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: ok
MISCELLANEOUS
- 140: Daily_Status, Site base, Wed 10-Dec-1997 21:14:37 AKST,
Weather: light winds, mostly clear
STATIONS: Atlanta and Florida up and running. Cleveland down.
Baltimore back up and running 12/10 ~22:00gmt.
VOLTAGES/CURRENTS: Baltimore voltages came back up with TEG. Dropped
at 12/11 ~00:45 when TRH and 4-component fans were plugged in.
Baltimore currents increased at that time.
Baltimore voltages slowly dropping as of 12/11 07:00gmt.
TBOX: ok
TRH: Baltimore temps higher than Atlanta and Florida by 2C.
Baltimore RH 5% lower than Atlanta and Florida. Don't know
reason for differences.
4-COMP: ok
LEVELS: ok except for Baltimore, whose levels are not to be believed.
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: started frosting up 12/10 ~18:00gmt.
MISCELLANEOUS
- 141: Daily_Status, Site base, Thu 11-Dec-1997 09:43:23 AKST,
Weather: light winds
STATIONS: Cleveland down. Other stations up.
Attempted followup visit to Baltimore at 12/11 22:00gmt. Came to
200' lead about 1 mile from ship. Followed it in one direction
then decided that was futile and returned to the ship.
VOLTAGES/CURRENTS: Baltimore voltages low.
TBOX: Baltimore box temp lower than others.
TRH: Temperature increase/RH decrease at Baltimore at 10/11 ~13:00gmt.
4-COMP: ok
LEVELS: ok except for Baltimore, whose levels are not to be believed.
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: frosted
MISCELLANEOUS: At about 12/12 0Z, a pressure ridge formed approximately
half a mile north of the ship. It could be seen from
the ship's bridge, and heard for a couple of hours.
- 142: Rad_System, Site 4, Sat 13-Dec-1997 17:39:01 AKST,
12/13 22:30 - 12/14 01:00gmt
Replaced Florida's 4-port ventilation fan for its radiometers
with 4 individual "turbo" fans.
First, brought in 4-component and thawed it out. Both pyranometers
and the upwelling pyrgeometer had snow packed around the radiometers,
under the sun shields.
Thoroughly thawed and dried all the radiometers, installed the fans,
and replaced the unit at Florida. The fans did not go on, so I
removed the fans and brought them inside. There, I moved pin 4 to
pin 2 in the new fan connector so it matched the 4-port fan
connector.
I replaced the fans at Florida and this time they worked. They
have a loud high pitched whine compared to the earlier fans.
I also brushed frost off the sonic with the feather duster.
- 143: Daily_Status, Site base, Sat 13-Dec-1997 18:02:30 AKST,
Weather: low clouds, mild temps and light winds
STATIONS: Cleveland down. Other stations up.
VOLTAGES/CURRENTS: all ok
TBOX: all ok
TRH: same, ok
4-COMP: same, ok (data gap due to work done on FLA ~ 1300 AKST)
LEVELS: same
PRESS: ok
TSOIL: ok (looks a flittle flaky at ATL)
GSOIL: ok
SONICS: frosted except for FLA
MISCELLANEOUS:
- 144: Daily_Status, Site base, Sun 14-Dec-1997 10:01:28 AKST,
Weather: colder temps today
STATIONS: Cleveland down. Baltimore continues to have intermittent transmission problems. Other stations up.
VOLTAGES/CURRENTS: ok
TBOX: ok
TRH: ok
4-COMP: ok
LEVELS: ok
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: ATL stopped tranmitting sonic data at 0300 Z. All look frosty.
MISCELLANEOUS:
Another lead opened up before the Tuk station, crack also developed between tower and scintillometer (about 100 ft from transmitter tripod) parallel to the ridge.
200` wide N-S lead opened up about a mile E of the ship on 12/11gmt,
blocking the route to Baltimore.
W-E pressure ridge formed early on 12/12gmt about half a mile N of the
ship, probably crossing the Atlanta route.
- 145: Daily_Status, Site base, Mon 15-Dec-1997 10:45:12 AKST,
Weather: colder temps today
STATIONS: Cleveland down. Baltimore continues to have intermittent transmission problems. Other stations up.
VOLTAGES/CURRENTS: ok
TBOX: ok
TRH: ok
4-COMP: ok
LEVELS: ok
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: ATL stopped tranmitting sonic data at 0300 Z. All look frosty.
MISCELLANEOUS:
Another lead opened up before the Tuk station, crack also developed between tower and scintillometer (about 100 ft from transmitter tripod) parallel to the ridge.
200` wide N-S lead opened up about a mile E of the ship on 12/11gmt,
blocking the route to Baltimore.
W-E pressure ridge formed early on 12/12gmt about half a mile N of the
ship, probably crossing the Atlanta route.
- 146: Daily_Status, Site base, Tue 16-Dec-1997 10:32:34 AKST,
Weather: no distinctive weather to report
STATIONS: Cleveland down. Baltimore continues to have intermittent transmission problems. Other stations up.
VOLTAGES/CURRENTS: ok
TBOX: ok
TRH: ok
4-COMP: ok
LEVELS: ok
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: ATL transmitting sonic data intermittently.
MISCELLANEOUS: lead and ridge situation the same
12/16 ~20:15-23:30 Intermittently checked Baltimore's level
coefficients. Accidentally changed two, then changed
them back later.
- 147: Daily_Status, Site base, Wed 17-Dec-1997 10:35:49 AKST,
Weather: temps and pressure rising
STATIONS: Cleveland down. Baltimore not transmitting today at all. Other stations up.
VOLTAGES/CURRENTS: ATL ok, FLA load went squirrely
TBOX: ok
TRH: ok
4-COMP: ok
LEVELS: ok
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: ATL noisy and transmitting sonic data intermittently.
MISCELLANEOUS: lead and ridge situation the same
12/16 ~20:15-23:30 Intermittently checked Baltimore's level
coefficients. Accidentally changed two, then changed
them back later.
- 148: Visit_Log, Site 4, Wed 17-Dec-1997 20:21:31 AKST,
12/17 ~01:00gmt
Visited Florida. Changed Flashcard and propane.
Using ladder, cleaned heavy frost off sonic. Brushed off bulk of
frost with feather duster, then melted residue off with
fingers.
Cleaned moderate frost off all 4 domes on 4-component. New "turbo"
fans with heater resistors not keeping frost off.
Brushed heavy frost off TRH. Made sure inlet was clear.
Snow has accumulated an average of about 1' since installation.
Sastrugi up to about 1', and domed drifts up to about 2' within
50' of station.
Drift from sled box extends to about the spot underneath the
4-component.
Drifts, apparently from nearby camp huts extend to within 50' of
station.
Moderate hoar frost on all snow and structure surfaces.
Inversion layer causing ship's exhaust to come down to surface
level, blowing towards Met tower. Florida on edge of plume
at time of visit.
- 149: Visit_Log, Site 4, Wed 17-Dec-1997 20:37:42 AKST,
12/18 ~04:00gmt
Visited Florida again after noticing TEG and battery voltages had
drifted downward slightly about 45 minutes after changing the propane
the previous day. Iplot program showed charge and load currents
increasing to impossibly high levels at that time.
Hooked Rocky laptop up to Eve. User POWR command to see voltages
and currents. All looked fine. Charge current ~1.9A. Load
current ~1.1A.
Sled box analog ammeter showed current of 1.8A.
Returned to ship. Used eve_console software to talk to Florida's
Eve computer. Showed unbelievably high currents- over 6A.
- 150: RF_Communications, Site 3, Wed 17-Dec-1997 21:00:19 AKST,
12/18 ~01:00gmt
Brushed frost off PAM antenna mounted on ship. Twisted 4 rods at
base of antenna so they were symmetrical again, not skewed.
Tested RF communication quality to Baltimore. Still lousy. Has
always been bad, but seems to have gotten worse in last few days.
- 151: Visit_Log, Site 1, Wed 17-Dec-1997 21:04:57 AKST,
12/17 ~18:30gmt
Attempted to reach Atlanta. Pressure ridge that formed several days
ago about a half mile north of the ship had opened up to form 200'
lead, full of chunky ice. Edges of lead by Atlanta route full of
large ice chunks, up to 6' wide. Open water in middle of lead,
about 8' wide. Pressure ridge remnants dwindle to the east, where
lead curves around to the south. (It's probably the same lead
crossing the Baltimore route.) It may be passable to the east after
the ice thickens.
12/17 ~22:30gmt
Followed tiny pressure ridge few hundred yards to the west of the
ship to the north, where it joins the large lead that blocked the
Atlanta route. Had hoped to find lead crossing there. Found
less pressure blocks on edge of lead, but lead was 300' across,
without any chunky ice across its width. No open water visible,
but too late in day to drill the lead and try to cross. This was
just a scouting trip.
Returned to ship, then headed out the Cleveland route to scout out
the first lead crossing. Large lead was well frozen. Small, more
recent lead had closed forming only slight pressure ridge. Plan to
try to get to Cleveland tomorrow.
- 152: Base_Software, Site base, Wed 17-Dec-1997 21:24:39 AKST,
12/18 06:20gmt
Installed 971215 logbook software upgrade from Gordon.
- 153: Sonic, Site all, Wed 17-Dec-1997 21:32:38 AKST,
> Some uncertainty has arisen about the exact method that you use to
> access the sonics when cleaning them, particularly how you are able to
> warm the transducers with your fingers. Do you climb onto the tripod
> and then reach out to the sonic? Do you remove the sonic from the
> boom? Do you lower the mast to bring the sonic down to ground (snow)
> level?
The very first time I cleaned a sonic beyond brushing it with the
feather duster, I climbed onto the tripod, and removed the one screw
holding the sonic base support to the horizontal arm. With the sonic
temporarily upside down, I cleaned the heads. This was rather cumbersome,
and didn't bode well for the future of the cable connector.
Ever since then, we have taken a ladder along with us on the
emergency gear sled. I punch the ladder legs into the snow, climb up the
ladder, and melt the frost with my fingers.
Florida, being right by the ship, gets more frequent cleaning. On
some cleanings, we just step up on the tripod and clean the sonic frost off
with the feather duster.
If conditions are ripe for riming, no matter the method of cleaning,
the sonics rime back up usually within 2 hours.
- 154: Daily_Status, Site base, Thu 18-Dec-1997 10:22:39 AKST,
Weather: no outstanding weather to report, temps lower
STATIONS: Cleveland down. Baltimore not transmitting today at all again. Other stations up.
VOLTAGES/CURRENTS: ATL ok, FLA load still pegged but reads ok at the station.
TBOX: ok
TRH: ok
4-COMP: ok
LEVELS: ok
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: Very rimey last 3 days, tripods, tower and cables extra frosted. Cleaned FLA sonics (with feather duster) at 1400, 17 Dec, that lasted 4 hrs which was longer than it lasted after the previous days brushing. ATL noisy due to frosting as well and transmitting sonic data intermittently.
MISCELLANEOUS: lead and ridge situation the same
12/16 ~20:15-23:30 Intermittently checked Baltimore's level
coefficients. Accidentally changed two, then changed
them back later.
- 155: Visit_Log, Site 2, Thu 18-Dec-1997 18:08:22 AKST,
12/18 ~19:30
Visited Cleveland.
To get to Cleveland, crossed two large frozen leads that were not
there on the last visit. Both a couple of hundred meters across.
For both, once across, had to travel to the right few hundred meters
to find next section of trail.
Crossed other small leads and pressure ridges as well.
Changed propane and Flashcard.
Got TEG going. Changed out battery with fully charged one. Found 3
loose wires in battery compartment. Wasn't sure where they went or
whether they've always been loose, so left them.
Removed nozzle. Found it to be clean so reinstalled it.
BEAR DAMAGE:
4-component fan missing. Only black plastic connector at
end of its cable remained.
One pyg cable yanked from the CSI box, partially breaking
bulkhead connector.
Snow temperature and heat flux plate cables hanging down.
Wire ties holding up excess cable had been broken.
TRH intake tube hanging by sensor wires.
TRH cable yanked off TRH when bear bit cable and pulled it
back through beam. Twist lock ring broken on
connector.
Feather duster, whose handle had been stuck in open top of
pipe at center of tripod, was broken.
Reattached pyg cable. Pins are fine. Part of plastic bulkhead
connector is missing.
Tried to bundle up excess snow sensor cables. HFT cable insulation
snapped in the cold. Loosely bundled up cables. Cables are still
within reach of a fox.
Replaced TRH with spare. TRH cable is mangled but works. Cable
connector doesn't lock, but still works.
Removed remains of feather duster so they wouldn't attract
another bear attack.
Did not have a spare 4-component fan with me so didn't replace the
missing one.
Cleaned heavy frost off sonic with ladder and mitten. Melted slight
frost residue off with fingers. Sonic heads then clean and dry.
Cleaned heavy frost off radiometer domes.
Fresh fox tracks in snow around station.
Used Rocky laptop to check all variables. All looked good, with
possible exception of sonic variables.
Fairly new pressure ridge swings around site on N and W sides, coming
to within about 150' of station.
Returned to the ship. No Cleveland data showing up on Splus plots.
Cleveland data looks fine, though, when using eve_console on pampoll
laptop.
Downloaded Flashcard data. Data only goes through 11/30 (local),
though Cleveland was active until 12/10 when its battery died. Data
suspicously stops at 0Z 12/1. I think Florida's Flashcard did the
same thing recently.
- 156: , Site 1, Fri 19-Dec-1997 11:34:26 AKST,
12/19 01:30gmt
Turned on beacon at Atlanta for help in locating it on eventual
visit. Found out next day compass reading dropped 2.5 degrees at that
moment.
- 157: Visit_Log, Site 4, Fri 19-Dec-1997 21:38:45 AKST,
12/19 ~1900gmt
Cycled power to electronics box at Florida after experimenting with
eve "start" command from ship caused it to hang.
- 158: Visit_Log, Site 4, Fri 19-Dec-1997 21:40:33 AKST,
12/19 ~2300gmt
Attempted to find problem with Florida's high reported currents and
slowly dropping voltages. Did not find problem.
- 159: EVE, Site 2, Fri 19-Dec-1997 21:41:55 AKST,
12/19 ~18:00gmt
Used eve_console to talk with Cleveland. Generator and instruments
still working, but data acquisition program is not working. Nothing is being
stored on the Flashcard. This explains why Splus is not showing any data
for Cleveland.
Attempted to use "stop" and "start" commands, but with each command,
communications locked up. Never got prompt back.
- 160: Daily_Status, Site base, Sat 20-Dec-1997 09:06:54 AKST,
Weather: light winds, cold temps still in frosty and rimey situation. (log skipped yesterday, nothing of note for daily report anyway, same weather situation.
STATIONS: Cleveland is up but data acquisition is not running. Baltimore is up but not transmitting. Other stations up and transmitting.
VOLTAGES/CURRENTS: ATL ok, FLA load still pegged at 5 amps.
TBOX: ok
TRH: ok
4-COMP: ATL frosted over so much that r's are all ~ 0.
LEVELS: ok
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: Very rimey still. Cleaned FLA sonics (with feather duster) at 1000, 19 Dec, which seemed to last about 5 hrs before riming over again. ATL not reporting sonic data.
MISCELLANEOUS: crack near far scintillometer tripod no longer evident. Went out there yesterday to bring in tripods. Scintillometer now completely dimantled and packed away.
12/16 ~20:15-23:30 Intermittently checked Baltimore's level
coefficients. Accidentally changed two, then changed
them back later.
- 161: Visit_Log, Site 4, Sat 20-Dec-1997 18:29:49 AKST,
12/20 ~18:30gmt
Visited Florida to investigate problem with high reported currents
and slowly dropping voltages.
Pyrgeometer domes clear. PSP domes frosted.
Brushed frost off sonic by standing on tripod brace and brushing off
frost with feather duster.
Found through extensive testing that currents dropped when sled box
lid was opened, then increased when sled box lid was closed. This is why
Rocky never reported high currents when hooked up to Florida's Eve computer,
but values being sent to the ship were high.
Disconnected GPS cable at electronics box. Then currents stayed
low (normal), even after opening and closing box lid several times. (Janet
monitored the results from the ship using eve_console and radioed the
information to me while at Florida.) Thought there must be a short in the
GPS cable, but couldn't find any sign of a short.
After lunch, returned to Florida and disconnected same wires that are
disconnected at Cleveland in the battery box. This was an attempt to see if
these disconnected wires could somehow cause Cleveland's data acquisition
program to hang. But the disconnected wires had no effect on Florida's
data acquisition program. Reconnected wires and closed lids.
Checked Florida data later in afternoon using Splus. Currents had
jumped up again at post-lunch visit.
Returned to Florida for diagnosis. Opening sled box lid caused
reported currents to drop again. Thought problem must be in antennna cable
as that was the only remaining active cable going through the sled box lid.
Thoroughly examined cable but could find no defects. One N-type connector
was slightly loose, but not very loose. After reassembling the antenna and
cable and rechecking currents and voltages, everything appeared normal. Tried
to get problem to reoccur by opening/closing lid, but couldn't get it to
happen again. Finally, let it be.
- 162: Daily_Status, Site base, Sun 21-Dec-1997 18:39:46 AKST,
Weather: cloudy skies and wind picking up
STATIONS: Cleveland is up but data acquisition is not running. Baltimore is up but transmitting intermittently. Other stations up and transmitting.
VOLTAGES/CURRENTS: ok
TBOX: ok
TRH: ok
4-COMP: ok
LEVELS: ok
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: ATL reports still intermitent, FLA ok
MISCELLANEOUS:
- 163: EVE, Site 2, Sun 21-Dec-1997 19:27:19 AKST,
12/21-12/22
Found problem with Cleveland not recording any data. The program
file config.dat was corrupted, by the extended power outage, the subsequent
cold, or the polar bear. One character was changed from an "L" to an "N",
causing it to hang at startup.
Have installed good version of program in spare board with the `
ramdisk on it. Will swap boards when we can get back to Cleveland, but
Atlanta must be visited first before it runs out of propane. Hope for Atlanta
visit tomorrow, but weather is deteriorating.
The RF link is too noisy to download the new program from the ship.
- 164: Daily_Status, Site base, Mon 22-Dec-1997 09:42:48 AKST,
Weather: winds up, temps rising, P decreased 12 mb in past 24 hrs. storm possible.
STATIONS: Cleveland is up but data acquisition is not running. Baltimore is up but transmitting intermittently. Other stations up and transmitting.
VOLTAGES/CURRENTS: ok
TBOX: ok
TRH: ok
4-COMP: ok
LEVELS: ok
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: ATL reported much more solidaly today but data is noisy, FLA looks ok probably due to higher winds cleaning off frost and rime and keeping it from formaing.
MISCELLANEOUS:
- 165: Visit_Log, Site 3, Mon 22-Dec-1997 20:20:45 AKST, 12/10 Baltimore visit
email excerpt concerning 12/10 Baltimore visit:
---------------------------------------------------------------------------
Yesterday's Baltimore trip was quite tame compared to the previous
trip last month. We followed the normal staked route. We came to one 15'
lead that had formed and frozen since the scouting party had found
Baltimore several days earlier. After testing its thickness, we crossed
it without a problem.
The big lead which had blocked our route for so long was also frozen
over.
My hat's off to Herman Nelson. A Herman Nelson is a gasoline
powered heater that puts out massive volumes of hot air. With its 10"
hose inserted into the propane tank door, it heated up the TEG and all
the electronics in no time, as well as defrosting goggles and warming
hands. (The downside is that it weighs 500# and has to be muscled onto a
sled.)
No marshmallows or smores this time as the TEG started right up.
(I had replaced the nozzle.)
The TEG voltage rose slowly as the TEG heated up. Eventually the
battery indicator LED's in the battery box went from flashing red to
yellow to green. Then I turned on the instruments. But that was too much
current draw too soon and the battery voltage soon dropped into the
flashing red. So I waited a while, disconnected the 4-component fan and
the TRH fan, and then turned the key switch back on. This time the
voltages held.
I hooked up Rocky, ready to do battle with the CSI, but found it
was working just fine now.
We then helped the CRREL tech with his drilling and core sampling,
I connected the fans back up and we were off, getting back to the ship at
4:30pm.
Please send a jacuzzi and a masseuse. The snow surface after the
past few storms is riddled with sastrugi- hard windcarved ridges up to
about a foot high. Imagine riding for 5 miles across a series of
speedbumps every 10' in a car with no shock absorbers, towing a trailer.
And then when looking at the data from the ship, the voltages were
dropping... (They have since leveled off, but at about 11.8V.)
This morning I noticed an increase in Baltimore's RH at about 5am
local (about 13 hours after our return).
With marginal voltages and the CRREL tech needing to return to the
Baltimore area, we decided to make a quick trip out today after lunch. So
three of us headed out. I was toolin' along in the lead (no pun intended)
snowmobile about a mile from the ship when I saw ahead what looked like a
frozen over lead. But I didn't recall a frozen lead that wide the day
before. I stopped the snowmobile, then gawked at the 200' lead that
hadn't been there the day before. I tested the ice with an ice chisel,
and the chisel went right through with little hesitation. There was just
a skim of ice on the water, with enough frost on top that it looked much
the same as the surrounding snow, only flatter.
We looked in the direction of the moon and could see no end of the
lead that way. We traveled along the lead in the other direction, but
gave it up as a lost cause before long. This was not a 10' lead where you
could expect two jagged corners to be touching where the ice sheets had
shifted.
- 166: Daily_Status, Site base, Tue 23-Dec-1997 10:59:46 AKST,
Wx: Nothing of note, calmer and clearer.
STATIONS: Cleveland is up but data acquisition is not running. Baltimore is up but not transmitting. ATL is up and fine, FLA teg out at 2200 AKST (day 356) ran on battery power until data 0600 AKST (day 357) then it was down.
VOLTAGES/CURRENTS: ATL ok, FLA (see above comment).
TBOX: ok
TRH: ok
4-COMP: ATL still frosted over, FLA ok.
LEVELS: ok
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: ATL again intermittent and noisy, FLA looks great.
MISCELLANEOUS:
- 167: Visit_Log, Site 1, Tue 23-Dec-1997 15:39:53 AKST,
12/23 ~20:00gmt
Visited Atlanta. Changed propane and Flashcard.
Cleaned moderate frost off pyg.in and psp domes. Pyg.out dome was
frost free.
Cleaned heavy frost off sonic by standing on ladder and brushing frost
off with mitten. Tried using fingers to melt off residual frost, but they
actually seemed frost free at that point.
Cleaned heavy frost off TRH inlet. It had mostly occluded the intake
tube opening. Removed intake tube and examined temp and humidity sensors.
They were frost free.
To get to Atlanta, we followed the staked route to the CRREL site
called Tuk (Tuktoyaktuk), followed the large lead/pressure ridge to the left
(west) for a few hundred yards, crossed the frozen lead, then just headed
straight for Atlanta's beacon. (If it's dark, and lights are turned off, you
can see Atlanta's beacon from the ship, even at ground level.)
Relative to the ship's bow, Atlanta has shifted 30 degrees toward the
rear of the ship. Most, probably all, of this shift occured when the lead at
Tuk opened up and the floes shifted.
We crossed a small (1-2') pressure ridge trending NW-SE about 250'
prior to reaching Atlanta.
The route had a lot less sastrugi on it than the Baltimore route.
A crescent moon shone over the ship as we worked.
There are drifts 1-2.5' tall around the sled box, but there's enough
wind scour around the box itself that the intake holes in the bottom of the
box are clear.
- 168: Visit_Log, Site 4, Tue 23-Dec-1997 16:02:18 AKST,
12/23 ~23:00gmt
Visited Florida. Changed propane. It had run out of propane
prematurely in less than 7 days while it usually has run for 8-9 days. The
propane cylinder may not have been as full.
The battery didn't last very long since it wasn't fully charged yet
after its recent drawdown.
The TEG was cold and difficult to start. Eventually it settled down,
though. I left the system load completely off for a while to help charge the
battery.
Cleaned frost off pyg.in and psp domes. Pyg.out dome was frost free.
Cleaned a very slight amount of frost off sonic by standing on ladder
and using fingers to warm heads.
1/26/99 Changed Site from 1 to 4 - twh
- 169: Daily_Status, Site base, Wed 24-Dec-1997 10:09:19 AKST,
Wx: Nothing of note, calm and clear, nice aurora.
STATIONS: Cleveland is up but data acquisition is not running. Baltimore is up but intermittently transmitting. ATL and FLA are up and fine,
VOLTAGES/CURRENTS: ok
TBOX: ok
TRH: ok
4-COMP: ATL still frosted over, FLA ok.
LEVELS: ok
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: noisy, tcount low on ATL not too bad on FLA
MISCELLANEOUS:
- 170: Visit_Log, Site 3, Wed 24-Dec-1997 23:36:49 AKST,
12/24 ~20:30gmt
Visited Baltimore. Changed propane and flashcard.
TRH fan was running and there was no unusual frost inside the intake
tube or around the fan. But to be on the safe side, changed TRH with one
removed from Cleveland. Used laptop to check temps and humidity. They
seemed reasonable.
Slightly tightened N type coax connector on base of antenna.
(Transmission seemed no better after returning to ship.)
Pyg.out was clear of frost. Cleaned moderate frost off other three
domes.
Brushed 3/4" of frost off sonic assembly with feather duster.
Warmed heads with fingers (using ladder), but no significant frost remained
after the brushing.
Removed beacon as it wasn't working. Computer showed it to be on,
and a voltmeter showed 5V going into it. Will take a new beacon out on next
trip.
Route to Baltimore has changed since last successful trip out there.
About a mile from the ship, after crossing a 200' frozen lead , we were
surprised to find stakes immediately after the crossing. They angled off to
the left (north) which seemed unusual, but we followed them anyway for a
ways before realizing for sure that this was the distal portion of the `
Atlanta trail! The two ice floes had shifted just the right amount to line
up the near portion of the Baltimore trail with the far portion of the
Atlanta trail.
We backtracked, followed the lead in the other direction for about
a half a mile, found the next section of the Baltimore trail and continued.
The rest of the route was unchanged from the previous visit. (So it included
crossing the frozen 200 yard lead farther on towards Baltimore.)
- 171: Daily_Status, Site base, Fri 26-Dec-1997 18:14:43 AKST,
Wx: This entry for 25th and 26th; very calm x-mas day, very very hoar-frosty, beautiful cystal growth w/ feathers extending up to an inch long. 26th winds picked up slightly still calm tho'.
STATIONS: Cleveland is up but data acquisition is not running. Baltimore is up but intermittently transmitting. ATL and FLA are up and fine,
VOLTAGES/CURRENTS: BAL and CLE ok, ATL and FLA low voltages centered around 12 v
TBOX: ok
TRHP: ok
4-COMP: BAL and ATL still frosted over, FLA ok.
LEVELS: ok, BAL at 1.5 and 2.5
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: all frosty and noisy
MISCELLANEOUS:
- 172: Daily_Status, Site base, Sat 27-Dec-1997 09:30:44 AKST,
Wx: Breezy and cold. Still very frosty outside.
STATIONS: Cleveland is up but data acquisition is not running. Baltimore is up but intermittently transmitting. ATL and FLA are up.
VOLTAGES/CURRENTS: BAL and CLE ok, ATL and FLA low voltages centered around 12 v
TBOX: ok
TRHP: ok
4-COMP: BAL and ATL still frosted over, FLA ok.
LEVELS: ok, BAL at 1.5 and 2.5
PRESS: ok
TSOIL: ok
GSOIL: ok
SONICS: all frosty and noisy, ATL not transmitting sonic data.
MISCELLANEOUS:
- 173: Visit_Log, Site 2, Sat 27-Dec-1997 18:36:01 AKST,
12/27 ~
Visited Cleveland. Changed propane, bringing back one nearly empty
and one mostly full tank. Cleveland was visited not because it was due for
a propane change, but because its data acquisition program was not running.
Cleaned heavy frost from sonic with feather duster. Then melted
crusty residue with fingers. (Used ladder for cleaning.)
Cleaned heavy frost from all 4 radiometer domes.
Replaced DCOM332 CPU board and adjoining I/O board. The CPU board
was replaced because of a possible memory chip problem where one bit of the
data acquisition file changed, causing the program to hang. The replacement
CPU board already had Cleveland's config.dat file loaded into its memory.
(The I/O board was replaced only because there's a vinyl insulated ribbon
cable attaching it to the CPU board. Under extreme cold conditions, it was
safer to replace them as a pair instead of flexing or removing the ribbon
cable.)
Added the 4-port fan that was removed from Florida recently to the
4-component to replace the missing fan that the bear ripped off.
Used the Rocky laptop to check that data acquisition system was now
running.
Forgot to reconnect 3 loose wires inside battery box. Two wires are
a pair used to measure a TEG or battery voltage or current. From the data,
I think it must be for i.charge. I don't know what the third wire is for.
No new lead activity along route, or noticed around station.
Sastrugi around site (from storms about 3 weeks ago) is mostly about
6" high.
- 174: Daily_Status, Site base, Mon 29-Dec-1997 09:26:30 AKST,
Wx: Still very frosty outside, all sonics and domes covered in frost. Bear in camp yesterday...skipped report for day 362, this is for both days.
STATIONS: BAL stopped transmitting at 0700 Z, the rest are ok.
VOLTAGES/CURRENTS: ok
TCNT: all bad, w's all bad
TRHP: ok
4-COMP: All pretty frosted over, tried to melt off FLA, got superceded by bear.
LEVELS: ok, BAL still suspicious
PRESS: ok
T and G: ATL offset
SONICS: all frosty and noisy
MISCELLANEOUS:
- 175: Visit_Log, Site 4, Mon 29-Dec-1997 14:29:58 AKST,
12/29 ~22:45
Visited Florida. Changed propane.
Changed nozzle in hopes that partially clogged nozzle was causing low
TEG voltage.
Cleaned crusty frost from sonic using finger heat.
Cleaned frost from pyg domes.
- 176: EVE, Site 4, Tue 30-Dec-1997 14:30:26 AKST, Flashcard problems at Florida and Baltimore
12/30 ~22:30
Florida and Baltimore have both stopped storing data on their
flashcards. Baltimore is also not sending any data to the ship.
Visited Florida to investigate why it stopped storing data on its
flashcard.
Plugged in laptop. Tried to look at flashcard and got:
System EVE# dir /card
Can't open "/CARD".
Turned off keyswitch on EVE box, waited 30 seconds, restarted. Then
was able to view /card with no problem.
Changed flashcard. On ship, found that recording on flashcard stopped
12/24 00:20gmt.
- 177: Daily_Status, Site base, Tue 30-Dec-1997 18:09:05 AKST,
Wx:Not as frosty, windier conditions, very cold and hi P scenario, clear skies w/ ice cystals blowing through the air.
STATIONS: BAL intermittently transmitting
VOLTAGES/CURRENTS: ok
TCNT: ATL not reporting wind data at all, CLE not reporting after 1100Z, FLA noisy (even tho cleaned off once per day).
TRHP: ok
4-COMP: All pretty frosted over.
LEVELS: ok, BAL still suspicious betweem 1 and 3 degrees
PRESS: ok
T and G: ATL flaky on Tsoil
SONICS: all frosty and noisy
MISCELLANEOUS:
- 179: Daily_Status, Site base, Wed 31-Dec-1997 18:40:31 AKST,
Wx: P dropping from a "high" of 1045 but still high, clear skies, low temps persisting, low RH's and breezy.
STATIONS: All stations are transmitting!
VOLTAGES/CURRENTS: load and current dropped at FLA on 2200 Z (?) and wierd load wiggles at all stations were reported at 2300 Z (looks suspicious)
TCNT: Only FLA w/ decent amount of counts for wind data
TRHP: Tplat for all stations bottoms out ~ -40, (evident over last 24 hrs since temps were down to -42 C), Ttherm looking good tho'. RH and P holding their own.
4-COMP: All pretty frosted over except for FLA
LEVELS: ok, BAL still suspicious betweem 1 and 3 degrees
PRESS: ok
T and G: ATL flaky on Gsoil
SONICS: all frosty and noisy
MISCELLANEOUS:
- 180: Visit_Log, Site 4, Wed 31-Dec-1997 20:59:08 AKST, Reinstall beacon, TRH swap, install propane filter, found 4-component fans to have died
12/31 ~23:00gmt
Visited Florida.
Brushed frost off sonic with feather duster while standing on
tripod frame.
Reinstalled beacon that had been borrowed for possible relocation
at Baltimore. (Baltimore's beacon was repaired.)
Installed Baltimore's TRH for testing. Temperature measurements
agree with other sites. RH is about 5% lower than other sites, but may be
drifting upward. Will test at least overnight.
Installed propane filter in sled box. Replaced shut-off ball valve
that had leaked once before. Turned EVE off during this process.
When turned EVE back on, noticed 4-component fans were not running.
Then realized had not heard them (the new "turbo" fans were quite noisy)
before turning off EVE.
Checked voltage to fans and found it to be 12V- normal. Removed
fans.
- 181: Visit_Log, Site 4, Wed 31-Dec-1997 21:09:55 AKST, Install one-port fan w/heater resistors on 4-component
01/01 04:30gmt
Visited Florida.
Installed one-port fan w/heater resistors on 4-component. Had
brought set of 4 "turbo" fans to ship for diagnosis. None work right. One
will try to start if you blow into it, but it runs like a 4-cylinder car on 2
cylinders and eventually stops. Another one, once warmed up, will start if
you blow into it, but never comes up to full speed. The other two will not
even try to turn on their own once you stop blowing into them.
Leak checked new propane filter installation again.
- 182: Daily_Status, Site base, Thu 01-Jan-1998 10:31:43 AKST,
Wx: nothing outstanding of note
STATIONS: Baltimore still transmitting intermittently
VOLTAGES/CURRENTS: load on FLA up after fan install, load probably bogus on CLE
TCNT: All w's bad, only FLA w/ decent Tcount after cleaning but doesn`t last long.
TRHP: ok
4-COMP: same as previous report
LEVELS: same as previous report
T and G: ATL flaky on Gsoil
SONICS: all frosty and noisy
MISCELLANEOUS:
- 183: Visit_Log, Site 3, Thu 01-Jan-1998 22:29:54 AKST,
1/1 ~21:00gmt
Visited Baltimore. Changed propane. One tank was nearly empty, the
other completely full.
Rebooted EVE. Copied files from ramdisk to flashdisk. Changed
flashdisks.
Cleaned frost from radiometer domes.
Cleaned heavy frost from sonic anemometer. Used fingers to melt
frost residual after brushing off bulk of frost.
Replaced modem and antenna with spares. Janet tested RF communication
from ship, but it didn't improve.
Tested to see that data was being stored on flashdisk.
- 184: Rad_System, Site 3, Fri 02-Jan-1998 09:42:11 AKST, Baltimore CSI data outage
Found that Baltimore CSI data has not been recorded since 1/1 site
visit. During site visit Eve "POWR" command showed realistic values, but it
turns out these are not current values, but the last recorded values.
Had spare RJ45 cable with me at Baltimore, but vinyl cables in Eve
box were too cold and brittle by that time to risk moving them. POWR command
output made it appear that data was being recorded correctly.
On next Baltimore site visit will replace RJ45 cable and check
communications using "talk" function.
- 185: Daily_Status, Site base, Fri 02-Jan-1998 11:11:10 AKST,
Wx: Winds picking up, P dropped 12 mb last 24 hrs, temps up from -38 to -31.5-ish. First "wx" in a week.
STATIONS: Baltimore transmitting intermittently but much better today
VOLTAGES/CURRENTS: ok
WINDS: All w's bad, tcnts better w/stronger winfds but u and v noisy
TRHP: ok
4-COMP, LEVELS, T and G: ok except at BAL
MISCELLANEOUS:
- 186: Daily_Status, Site base, Sat 03-Jan-1998 11:37:06 AKST,
Wx: Winds continue to pick up, P dropped another 10mb last 24 hrs, temps up to -24.
STATIONS: Baltimore transmitting intermittently
VOLTAGES/CURRENTS: ok, load on CLE still bogus
WINDS: w/ increased wind speeds tcnts are up on all stations, FLA being the best since it is cleaned daily. ATL noisiest on u and v the rest look decent. w's however, are still pretyy bad on all stations except FLA.
TRHP: ok
4-COMP: ok
LEVELS, T and G: ok, except at BAL
MISCELLANEOUS:
- 187: Visit_Log, Site 1, Sat 03-Jan-1998 13:24:01 AKST, Atlanta visit
1/3 ~20:30gmt
Visited Atlanta. Changed propane and flashcard.
Changed TEG nozzle. Old one appeared dirty.
Pyg.out dome clear of frost. Pyg.in dome frosted on downwind side.
Cleaned this frost off.
Cleaned out plug of frost over TRH inlet.
Brushed and melted frost off sonic heads, using ladder.
Turned off EVE to change flashcard. Left EVE off while changing TEG
nozzle. When I turned EVE back on, the battery monitor/charger would not allow
any current to go to load. Waited about 20 minutes for TEG to bring up
battery voltage which was just below 12V, but monitor still wouldn't allow a
load. Disconnected power to the monitor, then reconnected it. The monitor
LED's then showed green instead of red. I then turned on EVE and the LED's
switched to yellow, but kept supplying power.
- 188: Visit_Log, Site 4, Sun 04-Jan-1998 10:41:14 AKST, Florida visit
1/4 ~18:00gmt
Visited Florda. Changed propane (1 bottle) and flashcard.
TEG had just run out of propane. It was still warm and started right
up.
No frost on instruments due to warmer temps and moderate wind.
Turned off EVE to change flashcard. When I turned Eve back on, its
power indicator LED's started coming back on, so I shut the lid and returned
to the ship. But Florida was not transmitting. I returned to Florida and on
EVE, the 12V power LED was not lit. I cycled EVE's power and then the 12V
LED came back on, after about 10 seconds which is the normal delay. It now
started transmitting.
- 189: Daily_Status, Site base, Sun 04-Jan-1998 11:40:11 AKST,
Wx: Snowing, steady winds and temps
STATIONS: Baltimore transmitting intermittently
VOLTAGES/CURRENTS: ok, load on CLE still bogus
WINDS: All tcnts and uvand w's look good for the first time, combo of sustainedhigh winds taking out frost most likely.
TRHP: ok
4-COMP: ok
LEVELS, T and G: ok, except at BAL
MISCELLANEOUS:
- 190: Hygrothermometer, Site 4, Mon 05-Jan-1998 14:15:36 AKST, Replaced fan in TRH at Florida
1/5 19:00gmt
Replaced fan in TRH at Florida. (This is originally Baltimore's TRH,
and was installed at Florida for testing.)
- 191: Visit_Log, Site 2, Mon 05-Jan-1998 14:18:54 AKST, Cleveland visit.
1/5 ~20:00gmt
Visited Cleveland. Changed propane and flashcard.
Cleveland was not due for propane, but the CRREL tech needed to go to
Cleveland, so I did a site visit anyway. One propane bottle was empty. The
other still weighed 50 pounds.
Reconnected loose wires in battery box. Sensing of i.charge is now
correct.
NO FROST ON WORKING SURFACES OF ANY INSTRUMENTS. Well, except for the
PSP domes which were covered with light frost. But the sun is still below
the horizon anyway.
Some light snow has accumulated in depressions and formed small drifts
since last visit. This must be from snowfall/drift during the previous couple
of days.
No sign of new leads or pressure ridges.
- 192: RF_Communications, Site 3, Mon 05-Jan-1998 16:14:07 AKST, Baltimore communications improved by moving base antenna.
1/6 00:30gmt
Swung ship PAM base antenna and its bracket from starboard side to
port side on its bracket. Rear mast is now less in line with antenna and
Baltimore. Baltimore communications still not as good as other sites, but
much improved. If need be, could probably install longer bracket.
- 193: Daily_Status, Site base, Tue 06-Jan-1998 16:28:19 AKST,
Wx: Calm, strong inversion, very rimey conditions
STATIONS: all ok
VOLTAGES/CURRENTS: all ok
WINDS: all tcnts, uv and w bad due to favorable riming conditions
TRHP: ok, rh on FLA being watched w/fan change
4-COMP: ok
LEVELS, T and G: ok
MISCELLANEOUS:
- 194: Daily_Status, Site base, Wed 07-Jan-1998 18:23:46 AKST,
Wx: Snowed overnight, winds calm today, very rimey
STATIONS: ok, except BAL not transmitting T+G, Tcd, X and Y levels.
VOLTAGES/CURRENTS: all ok
WINDS: all tcnts, uv and w bad due to favorable riming conditions
TRHP: ok, rh on FLA being watched w/fan change
4-COMP: looked frosted over
LEVELS, T and G: ok
MISCELLANEOUS:
- 195: Sonic, Site 4, Wed 07-Jan-1998 22:00:10 AKST, Heaters added to sonic at 4
The sonic at station 4 has been modified with the heaters. In
order to make the change, the TRH was modified and the new config
was downloaded. This took place at about 9:00 pm local.
The heater was set for 5 minutes on and 60 minutes off.
If everything goes ok we may get to Atlanta or Baltimore tomorrow.
The TRH instrument used was Florida. The instrument on Florida
before the change was the unit from Baltimore (refer to entry 190).
- 196: Sonic, Site 4, Wed 07-Jan-1998 22:32:50 AKST, Heater on!
The heater turned on at 22:05 GMT. The compass showed a
~0.8 degree shift. The current load went up about .4 amps.
There was no noticeable change in T ro RH.
- 197: Base_Software, Site base, Thu 08-Jan-1998 06:28:08 AKST, nc_server not running
Error message in log: nc_server not responding: RPC: Timed out.
FOLLOW-UP: PAMPOLL had to be rebooted to get nc_server running
properly. No data was lost. Trying to restart nc_server with the
script nc_server.up did not work. Tryed doing polldn then pollup.
This did not work either.
- 198: Daily_Status, Site base, Thu 08-Jan-1998 11:25:07 AKST, Calm, no additional riming
Wx: Calm, no additional riming, temps mild
STATIONS: ok, except BAL not transmitting T+G, Tcd, X and Y levels.
VOLTAGES/CURRENTS: all ok, Steve modifying FLA.
WINDS: all tcnts, uv and w bad due to favorable riming conditions, FLA cleaned
and ok.
TRHP: ok, rh on FLA being swapped in and out.
4-COMP: looked frosted over, FLA cleaned and ok.
LEVELS, T and G: ok
MISCELLANEOUS: Netserver out 0400-0600 AKST, data ok.
- 199: Hygrothermometer, Site 4, Thu 08-Jan-1998 11:58:29 AKST, TRH at 4 acting funny
The humidity at station 4 deviated from the other stations last night.
It did not agree with the met tower sensors either.
This was about 6 hours after the heater system was added. The sensor was
brought back to the ship for a looksee. Its response looked ok when
compared to the spare sensor. The TRH was put back out at 4, time was ~11:45
local.
- 200: Sonic, Site 4, Thu 08-Jan-1998 12:02:15 AKST, heater performance
The heater worked throughout the night. Looking at the response
of the sonic I would say it was a positive test. However, the level
of icing is low so further evaluation is needed. The change in the
TRH sensor, entry 199, may be related to the heaters.
- 201: Rad_System, Site 4, Thu 08-Jan-1998 13:01:54 AKST, 4-comp removed from Florida
The 4-comp system was brought to the ship to modify it
with the heaters mounted on the radiation shield.
- 202: Sonic, Site 4, Thu 08-Jan-1998 16:41:09 AKST, More on the heaters
The sonic temperature changes ~2 degrees when the heaters are on.
Jeff and I went out and visual examined the sonic transducers. Eventhough
there is not major riming going on, there was some buildup on the sonic
support arms. The transducer heads were clean.
- 203: Hygrothermometer, Site 4, Thu 08-Jan-1998 21:36:06 AKST, RH looking good at station 4
At ~18:00 local, station 4 RH came back into sync with the other
stations.
UPDATE: The RH continues to look good. There was a little bit of
activity from 4:00 to 6:00 am, local.
- 204: Sonic, Site 4, Fri 09-Jan-1998 06:44:23 AKST, Error counts on sonic
At around 5:00 am local the error count flag on the sonic started.
UPDATE: While installing the 4-comp, a visual inspection of the
GILL sonic showed alittle bit of icing on 2 of the transducers. The
heads were clean compared to the rest of the sonic.
- 205: Rad_System, Site 4, Fri 09-Jan-1998 10:13:50 AKST, 4-comp system back on station 4
The 4-component system is back on station #4. There are
3 heater resistors mounted on the radiation shield of each
sensor. Now we wait and see what happens!
NOTE: forgot to remove the large lockdown washer/bolt. Level
of sensor still looks ok.
- 206: Daily_Status, Site base, Fri 09-Jan-1998 21:26:49 AKST, Getting Colder.
Wx: Periodic clouds and ice fog. Getting colder.
STATIONS: BAL not transmitting T+G, Tcd, X and Y levels.
VOLTAGES/CURRENTS: all ok.
WINDS: all tcnts, uv and w bad due to favorable riming conditions, FLA cleaned
and ok.
TRHP: ok.
4-COMP: FLA removed at 11:30.
LEVELS, T and G: G out at ATL.
MISCELLANEOUS:
- 207: Daily_Status, Site base, Sat 10-Jan-1998 10:59:20 AKST,
Wx: Periodic clouds and ice fog. Increasing winds.
STATIONS: BAL not transmitting T+G, Tcd, X and Y levels.
VOLTAGES/CURRENTS: all ok. CLE declining.
WINDS: all tcnts, uv and w bad due to favorable riming conditions, except FLA.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: G out at ATL. Resumed at FLA.
MISCELLANEOUS:
- 208: Visit_Log, Site 4, Sat 10-Jan-1998 20:33:07 AKST, Cleaned frost off Florida sonic and domes
1/10 ~20:30gmt
Cleaned frost off two sonic heads that faced into the wind. One head
had a little frost on its face. The other head had a lot of frost on its face.
Cleaned light frost off two pyg domes.
- 209: Visit_Log, Site 4, Sun 11-Jan-1998 21:44:21 AKST,
1/11 ~23:15gmt
Visited Florida, training Ann. Changed propane and flashcard.
Very hard, thin frost/ice on radiometer domes. Removed some with hand, but couldn't melt it all off.
Brushed frost off sonic frame. Brushed/melted light frost off upwind
facing sonic heads.
Brushed light frost off TRH intake.
Checked /card with Rocky before leaving site.
1/12 ~07:00gmt
Looked at data and noticed TEG had quit immediately after earlier
site visit. Revisited site and found someone had not fully opened propane
tank valves. Slowly opened valves and TEG started right up.
- 210: Visit_Log, Site 4, Mon 12-Jan-1998 17:33:31 AKST, Florida TEG nozzle replacement
1/12 ~22:00gmt
Replaced nozzle in Florida's TEG. Charging current higher afterwards
by about 0.15A. Old nozzle had heavy clear, brown, and black lacquer like
deposits on its face. The orifice appeared round through a microscope, but it
must have had a thin coating on it, decreasing the propane burn rate and the
TEG output current.
- 211: Daily_Status, Site base, Tue 13-Jan-1998 08:38:39 AKST,
Wx: Cold and windy.
STATIONS: BAL not transmitting T+G, Tcd, X and Y levels.
VOLTAGES/CURRENTS: ok except for: CLE declining. FLA improving after nozzel
replacement
WINDS: all tcnts, uv and w bad due to favorable riming conditions, except FLA.
TRHP: ok.
4-COMP: ok. except out at BAL.
LEVELS, T and G: ok except BAL. missing T, G and levels
MISCELLANEOUS: Catching up with logbook enteries.
- 212: Visit_Log, Site 4, Tue 13-Jan-1998 18:40:39 AKST, Florida sonic swap
1/13 ~18:00gmt
Removed Florida's sonic and TRH for installation at Baltimore.
1/14 ~03:20
Installed Baltimore's sonic and TRH, with sonic heater modifications
made to them, at Florida.
- 213: Visit_Log, Site 3, Tue 13-Jan-1998 18:44:49 AKST,
1/13 ~20:00gmt
Visited Baltimore. Changed propane and flashcard.
Replaced CR10 RJ45 cable inside EVE box.
Replaced sonic with a heated head sonic.
Replaced TRH with one modified for sonic head heaters.
Loaded new configuration program- format 52.
Reinstalled previously removed and repaired beacon.
Ann removed moderate frost from radiometer domes.
The removed sonic was heavily frosted on all surfaces.
Inlet of removed TRH was completely covered with frost.
To get to Baltimore, we followed a new, nearly straight path from the
ship that had been marked out by support personnel.
- 214: Daily_Status, Site base, Wed 14-Jan-1998 08:29:00 AKST,
Wx: Cold and windy.
STATIONS: BAL now transmitting T+G, Tcd, X and Y levels.
VOLTAGES/CURRENTS: ok. CLE declining.
WINDS: all tcnts, uv and w bad at CLE and ATL. FLA ok. BAL shows improvement
with heater installation.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: ok
MISCELLANEOUS:
- 215: Daily_Status, Site base, Thu 15-Jan-1998 08:27:24 AKST,
Wx: Cold, windy. Patchy clouds early in the day. Clearing
towards evening.
STATIONS: ok.
VOLTAGES/CURRENTS: ok. CLE declining.
WINDS: all tcnts, uv and w bad at CLE and ATL. FLA ok. BAL shows improvement
with heater installation. BAL w fluxuating with iload.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: ok
MISCELLANEOUS:
- 216: Visit_Log, Site 4, Thu 15-Jan-1998 14:00:23 AKST,
1/15 ~18:30
Removed sonic and TRH from Florida to install at Atlanta.
- 217: Visit_Log, Site 1, Thu 15-Jan-1998 14:02:52 AKST,
1/15 ~20:00
Visited Atlanta. Changed propane and flashcard.
Cleaned light frost from radiometer domes.
Installed modified TRH and sonic with head heaters. Downloaded new
config.dat.
TRH fan didn't go on at first. Found bad wire and was able to move
it so that the fan stayed on. Will replace the TRH unit again on next visit.
One person in the party thought they saw a bear coming towards us.
A second person thought they saw something move as well. But the Blue Eye
Beam showed nothing but snow mounds. A bear, or watery eyes?
To get to Atlanta, we followed the original route for the first part
of the trip, then followed a new, direct staked route put up recently by
support personnel.
No new leads or changes in snow conditions.
3/31/99
Changed site number from 4 to 1 - TWH
- 218: Daily_Status, Site base, Fri 16-Jan-1998 10:10:17 AKST,
Wx: Cold, windy, clear.
STATIONS: BAL communications spotty. FLA sonic and TRH being modified.
VOLTAGES/CURRENTS: ok. CLE declining.
WINDS: all tcnts, uv and w bad at CLE. ATL improved
with heater installation. FLA out. BAL fluxuating with iload.
TRHP: Jump at ATL with TRH exchange. FLA out.
4-COMP: Cleaned at ATL and BAL. Light frost.
LEVELS, T and G: ok BAL levels checked by bubble, ok.
MISCELLANEOUS:
- 219: Daily_Status, Site base, Sat 17-Jan-1998 06:06:06 AKST,
Wx: Cold, windy, clear.
STATIONS: BAL communications spotty. FLA sonic and TRH being modified.
FLA communications spotty. CLE site offline at 14 UTC 16 Jan.
VOLTAGES/CURRENTS: FLA ok. BAL declining rapidly. Vteg piked from
16 Jan 21:30- 17 Jan 7:30 at ATL and recovered. CLE out.
WINDS: ATL improved with heater installation. FLA out.
BAL fluxuating with iload. CLE out.
TRHP: FLA out. CLE out.
4-COMP: CLE out. Others ok.
LEVELS, T and G: ok BAL levels checked by bubble, ok. CLE out.
MISCELLANEOUS:
- 220: Visit_Log, Site 2, Sat 17-Jan-1998 17:08:21 AKST, Cleveland visit
1/17 ~20:00gmt
Visited Cleveland. Changed propane and flashcard.
Cleveland had stopped transmitting to ship at 1/16 16:00gmt. Based on
flashcard data, the system was shut down by the battery monitor at
that time, even though the battery voltage was at 11.5V and the load
should not have been dropped until the battery voltage dropped to
10.5V. Then, at 1/17 18:30gmt, the system started back up by itself,
presumably because the TEG had charged the battery back up
sufficiently. The RF link was not reestablished at this time.
Cleaned moderate frost from radiometer domes.
Cleaned light frost from sonic heads.
Changed TEG nozzle.
Swapped out battery with fully charged one.
Returned to the ship to find that RF was not working. Jeff returned
to the site (~23:45) and replaced the antenna. One of 4 ground rods
was missing. Site was then able to communicate, though it's not
definite that the problem was the antenna, as what would've caused
the rod to fall out when nobody was on site? No animal tracks seen.
To get to Cleveland, we followed a new, straight flagged route put
up by support personnel.
No new leads or changes in snow conditions.
- 221: Visit_Log, Site 4, Sat 17-Jan-1998 21:42:31 AKST, Florida TRH and sonic installation
1/17 04:45gmt
Installed Atlanta's old TRH and sonic at Florida. Sonic now has head
heaters on it. The TRH was modified to support these heaters. In the process
of modification, the TRH's A/D stopped functioning, so the TRH's temps and
humidity, and the compass value are no longer being measured.
The TRH does control the sonic head heaters and the beacon.
3/31/99
This appears to have occurred on Jan 18 at 04:45 GMT - TWH
- 222: Daily_Status, Site base, Sun 18-Jan-1998 11:32:38 AKST,
Wx: Cold, windy, clear.
STATIONS: CLE back on at 18:00 17 Jan. Communications improved for
ATL and BAL.
VOLTAGES/CURRENTS: ATL and BAL ok. FLA showing added load. CLE
declining toward normal load.
WINDS: BAL and ATL tcounts between 1 and 0.6. CLE below 0.6.
FLA good after installation, turned poor around 10. Good conditions
to begin frost studies. FLA tcount looks bad even after cleaning
at 23:00.
TRHP: FLA out.
4-COMP: ok. FLA cleaned of light to moderate frost at 23:00 with ETOH.
LEVELS, T and G: ok BAL levels checked by bubble, ok.
MISCELLANEOUS:
- 223: Sonic, Site 1, Wed 21-Jan-1998 08:56:29 AKST, Sonic heating cycle changes at Atlanta
1/21 17:54
Changed heaton to 600. (10 minutes)
Changed heatoff to 6600. (110 minutes)
- 224: Sonic, Site 3, Wed 21-Jan-1998 08:59:09 AKST, Sonic heating cycle changes at Baltimore
1/21 17:54
Changed heaton to 600. (10 minutes)
Changed heatoff to 6600. (110 minutes)
- 225: Daily_Status, Site base, Wed 21-Jan-1998 18:44:55 AKST,
Wx: Cold, windy, clear.
STATIONS: Bear free.
VOLTAGES/CURRENTS: ATL and BAL ok. CLE declining toward normal
load. FLA load varies with heaters.
WINDS: BAL and ATL tcounts ok, CLE tcounts declined to nothing.
Beginning to try to melt out FLA sonic with heaters.
TRHP: ok. Spare TRH installed on FLA 20 Jan 16:00. T compares with
lowest tower sensor. RH a bit off. Will check with handheld.
4-COMP: ok. Ethyl alcohol used to clean FLA domes. Lower pyrg. almost
clear of frost. Lower pyran. lightly frosted. Upper pyrg. had
a uniform coat of thin ice. Upper pyran. typical light frost.
Will try an hourly survey of frost growth and compare data with
tower radiometers to better diagnose frost impact on data.
LEVELS, T and G: ok BAL levels checked by bubble, ok.
MISCELLANEOUS:
- 226: Sonic, Site 1, Thu 22-Jan-1998 09:56:25 AKST, Atlanta sonic heaters off
1/22 18:55gmt
Turned Atlanta's sonic heaters off (heaton=0) due to drop in battery
voltage.
- 227: Sonic, Site 3, Thu 22-Jan-1998 09:57:50 AKST, Baltimore sonic heaters off
1/22 18:55gmt
Turned Baltimore's sonic heaters off (heaton=0) due to drop in battery
voltage.
- 228: Daily_Status, Site base, Thu 22-Jan-1998 21:39:24 AKST,
Wx: Cold, windy, clear.
STATIONS:
VOLTAGES/CURRENTS: ATL and BAL declined sharply with added load.
CLE declining toward normal load. FLA load varies with heaters.
WINDS: BAL and ATL tcounts ok, CLE tcounts declined to nothing.
Cycling heaters brought FLA tcounts up, but not enough.
TRHP: ok.
4-COMP: ok. Light glaze on FLA in pyrg, out pyrg clear. Pyrans
frosted.
LEVELS, T and G: ok BAL levels checked by bubble, ok.
MISCELLANEOUS:
- 229: Sonic, Site 1, Fri 23-Jan-1998 15:06:45 AKST,
1/24 00:05gmt
Having trouble keeping sonic heaters turned off at Atlanta. Set
heaton=6 and heatoff=60000 at both Atlanta and Baltimore.
- 230: Daily_Status, Site base, Sat 24-Jan-1998 00:23:23 AKST,
Wx: Cold, windy, clear.
STATIONS: BAL communications going bad. ATL heaters turned themselves on
overnight.
VOLTAGES/CURRENTS: ATL returning to normal. BAL declining.
CLE declining toward normal load. FLA ok.
WINDS: BAL and ATL tcounts ok with heaters. FLA frosted over
after 3.5 hours without heaters. CLE not on the map. Heaters
replace on FLA today and set on 10 min cycle.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: ok BAL levels checked by bubble, ok.
MISCELLANEOUS:
- 231: Sonic, Site 1, Sat 24-Jan-1998 10:43:01 AKST,
1/24 19:42gmt
Set heaton=1 and heatoff=32000 at Atlanta.
- 232: Daily_Status, Site base, Sun 25-Jan-1998 19:26:17 AKST,
Wx: Warming, windy, blowing snow.
STATIONS: BAL communications failing.
VOLTAGES/CURRENTS: All stations Vteg declining with warmer weather.
BAL falling fast. FLA and CLE ok. ATL was recovering from heater
tests.
WINDS: FLA great with 15 minute heat cycle. Cutting the heater
times to see what the minimum is with the winds. CLE and ATL
improved. BAL is hard to tell with missing data.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: ok BAL levels checked by bubble, ok.
MISCELLANEOUS:
- 233: Daily_Status, Site base, Tue 27-Jan-1998 00:35:13 AKST,
Wx: Warm, snowy, high winds.
STATIONS: BAL communications failed.
VOLTAGES/CURRENTS: FLA holding with heater cycle. CLE leveling off.
BAL has no data. ATL leveling off.
WINDS: FLA looks good. Cut heater cycle to 5 minutes in 60. ATL
blown clear. BAL is hard to tell with missing data. CLE ok.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: ok BAL levels checked with level. Looking worse than before.
MISCELLANEOUS:
- 234: Visit_Log, Site 4, Tue 27-Jan-1998 00:47:15 AKST, FLA refuel
Changed one FLA propane tank.
- 235: , Site , Tue 27-Jan-1998 19:14:07 AKST, lead and cracks by ship, Baltimore flashcard problem
1/27 pm local
An EW lead opened up several hundred feet south of the ship. It's
about 75' wide in most spots, though touching and grinding at at least one
spot. To the E of the ship, the lead turns to the NE. It blocks the route
to Baltimore, which is in need of a clean nozzle and propane.
Coinciding with this event, communications with Baltimore improved
quite a bit, just as I was putting on a climbing harness to adjust the base
station antenna on the ship's forward mast. With 25 knot winds and Baltimore
apparently on the move, I canceled my climb.
I looked at Baltimore's flashcard. Data stopped being stored on
DOY 013, but started up again on DOY 027, possibly due to the battery monitor
dropping the load, the battery charging up, and the load being reattached.
I manually copied data for DOY's 023-026 from the ramdisk to the
flashcard.
- 236: Daily_Status, Site base, Wed 28-Jan-1998 08:09:52 AKST,
Wx: Warm, snowy, high winds from the E SE.
STATIONS: BAL communications resumed, Jan 27, 21:00. ATL communications
ceased at 14:00, Jan 28.
VOLTAGES/CURRENTS: ATL dropped to 11.7V before lost. icharge-iload almost
0.4 A at ATL. FLA holding with heat cycle. BAL declining rapidly with what
looks like the step function of a blocked nozzle.CLE dropping gradually.
WINDS: FLA, BAL and ATL all at 1.0 tcounts. CLE improving still. Heaters
on 5min/60min at FLA.
TRHP: ok.
4-COMP: ok. Dome clear at FLA, except for light frost on the downwind
side of the incoming pyranometer and a tiny bit of snow on the downwind
side of the pyrg.s.
LEVELS, T and G: ok BAL levels checked with level. x=1.5 y=2.5 degs.
MISCELLANEOUS: Lots of lead and ridge activity in the area, begining
on Jan 27.
- 237: Daily_Status, Site base, Thu 29-Jan-1998 07:47:16 AKST,
Wx: Warm, snowy, high winds from the E SE.
STATIONS: ATL communications ceased at 14:00, Jan 28.
VOLTAGES/CURRENTS: BAL iload approaching icharge. All tegs appear to
to have nozzle problems.
WINDS: FLA, BAL and CLE all at 1.0 tcounts. Heaters on 5min/60min at FLA.
TRHP: ok.
4-COMP: ok
LEVELS, T and G: ok BAL levels checked with level, x=1.5 y=2.5 degs.
MISCELLANEOUS:
- 238: Daily_Status, Site base, Fri 30-Jan-1998 02:20:15 AKST,
Wx: Moderate winds from the NNW. Clear skies.
STATIONS: ATL communications resumed Jan 30, 2:00 GMT.
VOLTAGES/CURRENTS: All tegs appear to have nozzle problems.
WINDS: ATL, FLA, BAL and CLE all at 1.0 tcounts. Heaters on 5min/60min at FLA.
TRHP: ok.
4-COMP: ok
LEVELS, T and G: ok BAL levels checked with level, x=1.5 y=2.5 degs.
MISCELLANEOUS: A lead opened in the center of camp, separating FLA, the
Met City, Ocean City and the garage from the ship. It was noticed at 22:00
GMT 029 and was about 4 inches wide. It grew to about 4 ft by 0:00 GMT 030.
By 4:30 it expanded to 40 ft and power was cut to the eastern half of camp.
The lead runs SSE past the stern of the ship and NNW to the W of Pittsburg.
It joins the large lead to the SSE of the ship and zigzags E and W several
times just N of camp. At 16:49, the lead appears to have closed overnight.
Several smaller lead which developed in the camp area have not expanded.
- 239: Visit_Log, Site 4, Sat 31-Jan-1998 00:46:51 AKST,
Changed left FLA propane tank. The left runs out before the right. The
right felt mostly full.
Unplugged the fan in the bottom of the box.
Blew out the fuel lines. The fuel filter line contained alot of sulfur-yellow
oily crud. The line blew clear and the filter was clean. The corregated
fuel line was clean. The pressure regulator line was clean. Nozzle
replaced.
TEG and EVE shutdown from 22:00-4:00 for Cat emergency.
TEG restarted at 4:00 with Otten method. Voltages on the increase.
Sonics and pyrg. clear of frost. Pyran. lightly frosted.
- 240: Daily_Status, Site base, Sat 31-Jan-1998 01:13:13 AKST,
Wx: Moderate winds from the NNW. Clear skies. Colder.
STATIONS: FLA visit.
VOLTAGES/CURRENTS: All tegs appear to have nozzle problems. FLA running.
WINDS: ATL, FLA, BAL and CLE all at 1.0 tcounts. Heaters on 5min/60min at FLA.
TRHP: ok.
4-COMP: ok
LEVELS, T and G: ok BAL levels checked with level, x=1.5 y=2.5 degs.
MISCELLANEOUS: A 1-3 m ridge has now formed where the lead was
yesterday. The east and west sides of camp were not greatly
displaced.
- 241: Daily_Status, Site base, Mon 02-Feb-1998 06:06:13 AKST,
Wx: Moderate winds from the NNW. Cloudy.
STATIONS: BAL communications lost 7:00 1 Feb, resumed 12:00 2 Feb.
VOLTAGES/CURRENTS: ATL, BAL and CLE teg voltages declining.
FLA V still increasing after visit. icharge 1.8!
WINDS: ATL, FLA, and BAL mostly at 1.0 tcounts. Heaters on 5min/60min at FLA.
CLE tcounts declining from 1.0.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: ok BAL levels checked with level, x=1.5 y=2.5 degs.
MISCELLANEOUS: Leads active on the port side of the ship.
- 242: Visit_Log, Site 1, Mon 02-Feb-1998 18:31:23 AKST, ATL site visit
Fuel: Changed propane tanks, both quite light. Tried to orient the tanks so
that the safety valve points up. With the current location of the bottles,
the T configuration of the hoses and the configuration of bottle valves, this
is impossible. The left bottle fitting points straight down in to the pvc
rail, with no room for a hose. The right bottle can be oriented correctly,
but only by kinking the hose. It might be possible to orient the bottles
correctly, by ending the pvc rails about 10inches from the end of the box and
moving the T further into the box or by adding right angle bends to the hoses.
Flash Card: Changed. Jan. 29 was missing on the card and no data received,
from 28 Jan 14:00 to 30 Jan 2:00.
Battery: Changed.
TRH: Moved from FLA to ATL to repair beacon.
Topology: Dug sled out of 3 ft drift. Packed drifts on site are oriented
NW/SE of the sled and the 4-comp. Lots of new loose snow on top of hard
packed drifts. 2-3 ft drifts throughout the area oriented in different
directions. No new lead or ridge activity in the area.
TEG: Tried to replace nozzle. It would not unscrew with a reasonable
amount of force. Brought the burner assembly back to the ship to work on it.
Jeff: At Atlanta, the nozzle would not come out. The part it's screwed
into just kept turning instead. I tried removing the two wingnuts holding
the end plate on. One of them was galled and would not come off. The
large wingnut holding the starting electrode in place will not budge.
I removed the burner from the TEG and brought it back to the ship.
I used a file and a nut splitter to remove the offending small wingnut.
(I have no current need to remove the large wingnut, although the ceramic
tube surrounding the electrode is cracked inside the exhaust hole.) To get
the nozzle out, I had to mount the venturi tube in a lathe chuck and
tighten the chuck very hard. I had already tried penetrating oil and a
torch to heat things up (not in that order), but that didn't help.
Several machinist types here confer that stainless steel on stainless
steel is a recipe for galling, and once it starts, you're hosed.
The nozzle came out, having traded some of its threads for those
in the venturi tube.
I cleaned the nozzle, with the ship's crew supplying some
industrial strength oven cleaner that they use on their boilers. It's the
best method I've found so far, but still required some work with with a
fine wire, a dental pick, contact cleaner and a microscope.
I'm beginning to question the idea of cleaning the nozzles anyway.
Not just in terms of labor spent, but in terms of reusing stainless steel
threads.
I've never tightened the nozzles into the burners with too much
force, but from now on, will use wrenches to tighten the fuel line to the
nozzle, but will only hand tighten the nozzles into the venturi tube.
Please send two 9/16" open end wrenches, one of which is the extra slim
variety.
I screwed/jammed the cleaned galled nozzle back into the galled
venturi and will try to get it back out to Atlanta tomorrow. Hopefully
that nozzle will last until the next flights. Otherwise, Atlanta's a
goner.
Sonic: Heads were mostly clean. Heater tape shows some tendency to trap snow
where it does not conform to the head. Medium rime on the sonic arms, not
interfering with the heads.
4-comp: Incoming: pyran light frost, pyrge very light frost on dome and
shield. Outgoing: pyran very light frost, pyrge clear. Fan is the 4-port
model with only the pyrge.s connected.
T+G: ok.
Antenna/Modem: ok.
Sled: Box fan disconnected.
- 243: Visit_Log, Site 4, Tue 03-Feb-1998 14:39:15 AKST, FLA
Installed repaired TRH. Beacon works.
Changed flashcard.
Heaters off to observe frosting. One sonic head lightly iced.
Pyrge.s good, Pyran.s lightly frosted.
Hard, blown drifts around the site with layers of new snow. There
appears to be one drift forming from the box corner to the 4-comp, and
other shipward of the tripod.
- 244: Daily_Status, Site base, Wed 04-Feb-1998 07:17:57 AKST,
Wx: Moderate winds from the NNW, high clouds.
STATIONS: ATL down waiting for teg burner replacement since 20:00 033.
VOLTAGES/CURRENTS: BAL no teg voltage, no icharge since 15:00, only battery
and iload. CLE declining. FLA good.
WINDS: CLE, FLA, and BAL good. FLA sonics clean at 22:00, 034 and heaters
have been off since 20:00 033.
TRHP: ATL beacon cable repair and unit installed at FLA.
4-COMP: ok. FLA both pyrges clean, both pyrans lightly frosted at 22:00 034.
LEVELS, T and G: ok BAL levels checked with level, x=1.5 y=2.5 degs.
MISCELLANEOUS: Lead through camp has been opening and closing for
the last 24 hours.
- 245: Daily_Status, Site base, Thu 05-Feb-1998 13:01:18 AKST,
Wx: Winds 20-30kt, blowing and new snow.
STATIONS: ATL down. BAL down at 19:30 035.
VOLTAGES/CURRENTS: FLA and CLE declining.
WINDS: CLE and FLA good. FLA heaters off.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: ok BAL levels checked with level, x=1.5 y=2.5 degs.
MISCELLANEOUS: Portside ice pack moved around 11:00, shifting the ship
200 ft aft relative to the Starboard camp. The lead in camp closed.
The port lead is open and there is open water at the stern and bow.
- 246: Daily_Status, Site base, Thu 05-Feb-1998 18:29:07 AKST,
Wx: Overcast, no winds, -20s.
STATIONS: ATL and BAL down.
VOLTAGES/CURRENTS: FLA and CLE declining.
WINDS: CLE and FLA good. FLA heaters off. Sonics clean
at 0:00.
TRHP: ok.
4-COMP: ok. All domes clean except for incoming pyran. 0:00.
LEVELS, T and G: ok BAL levels checked with level, x=1.5 y=2.5 degs.
MISCELLANEOUS:
- 247: Daily_Status, Site base, Sun 08-Feb-1998 02:20:35 AKST, Log for 07-Feb-1998, 038
Log for 07-Feb-1998, 038
Wx: Cold, clear, windy.
STATIONS: ATL, BAL, CLE down.
VOLTAGES/CURRENTS: FLA increasing.
WINDS: FLA good. FLA heaters off. Sonics clean
at 20:00.
TRHP: ok.
4-COMP: ok. Pyrg. domes clean. Out pyran clean. In pyran frosted.
Checked at 20:00.
LEVELS, T and G: ok.
MISCELLANEOUS: The starboard camp broke into 3 pieces around 22:00. Ship
rotated 50 degrees North. Larges leads throughout camp. Met city and Ocean
city flow still intact.
- 248: Daily_Status, Site base, Sun 08-Feb-1998 02:39:05 AKST, Log for 06-Feb-1998, 037
Friday 06-Feb-1998
Wx: Cold, high winds
STATIONS: ATL and BAL down. CLE communications lost at 6:00.
VOLTAGES/CURRENTS: FLA holding.
WINDS: CLE and FLA good. FLA heaters off. Sonics clean at 20:00.
TRHP: ok.
4-COMP: ok. Domes clean at FLA, 20:00.
Levels: ok.
- 249: Visit_Log, Site 1, Sun 08-Feb-1998 21:27:00 AKST, Atlanta followup site visit
2/8 ~23:45
Visited Atlanta to replace TEG burner that had been removed for repairs
on 2/3.
Replaced TEG burner. Used rocket heater for about 2 minutes before its
power cord broke off in the cold. Got the TEG running anyway, but at first,
liquid propane came out of the nozzle, which leaked out of the combustion
chamber and caused flames on the outside of the combustion chamber.
Eventually, everything heated up and the TEG started working normally.
Very little frost on on instruments despite the cold. Only a light
frost on the up facing radiometer domes. It was thin, hard frost and would
not wipe off.
Sonic heads looked clean. TRH looked clean.
Tested beacon after returning to ship. It works now.
To prepare for the trip, we first had to get the PAM sleds off the
small floe containing the Blue Bayou where they were stranded. This
required using pick axes to cut a notch in a pressure ridge/lead. The PAM
sleds are now on the remaining large floe which contains the snowmobile
garage, Florida and Atlanta.
Cleveland and Baltimore are separated from the ship and the rest of
camp by multiple nearby leads.
There are at least 2 new cracks in the floe between Florida and
Atlanta.
- 250: Daily_Status, Site base, Sun 08-Feb-1998 23:49:04 AKST, Log for 08-Feb-1998 039
Wx: Cold, clear, light winds.
STATIONS: ATL, BAL, CLE down. FLA data gap, 0:00 - 1:00 (Network?)
VOLTAGES/CURRENTS: FLA increasing.
WINDS: FLA good. FLA heaters off. Sonics clean at 19:00.
TRHP: T.plat higher than T.therm. at FLA.
4-COMP: ok. Pyrg. domes clean. Out pyran clean. In pyran frosted.
Checked at 19:00
LEVELS, T and G: ok.
MISCELLANEOUS:
- 251: Daily_Status, Site base, Mon 09-Feb-1998 11:12:38 AKST,
Wx: Cold, clear, light winds.
STATIONS: BAL and CLE down. ATL started 1:00. FLA data gap 19:00-1:30.
VOLTAGES/CURRENTS: FLA and ATL voltages increasing. Icharge-iload
greater at FLA than ATL.
WINDS: ATL and FLA good. FLA heaters off. ATL heaters on. FLA showing
frost ~22:00.
TRHP: T.plat higher than T.therm. at ATL.
4-COMP: ok. Cleaned in pyran, of heavy frost, in pyrg. of moderate frost
and out pyran of light frost. Out pyrg clean.
LEVELS, T and G: ok.
MISCELLANEOUS:
- 252: Sonic, Site 4, Mon 09-Feb-1998 14:17:49 AKST, Florida sonic heating cycle turned on.
2/9 ~23:15gmt
Turned Florida's sonic heating cycle back on. Heaton=600, Heatoff=6600.
- 253: Daily_Status, Site base, Tue 10-Feb-1998 08:50:35 AKST,
Wx: Cold, clear, light winds.
STATIONS: BAL and CLE down.
VOLTAGES/CURRENTS: ATL voltages increasing. FLA ok.
WINDS: ATL and FLA good. ATL heaters on. FLA some frosting even
with heaters. Light rime cleaned from one sensor at 19:40.
TRHP: T.plat higher than T.therm. at ATL. ATL compass ok.
4-COMP: ok. FLA incoming pyran and pyrg. lightly frosted and cleaned at 20:40.
In pyran refrosted in 1 hour.
LEVELS, T and G: ok.
MISCELLANEOUS:
- 254: Daily_Status, Site base, Wed 11-Feb-1998 23:25:28 AKST,
Wx: Cold, clear, light winds.
STATIONS: BAL and CLE down.
VOLTAGES/CURRENTS: ATL voltages decreasing. FLA ok.
WINDS: ATL and FLA ok.
TRHP: T.plat higher than T.therm. at ATL.
4-COMP: ok. FLA incoming pyran and pyrg. lightly frosted.
LEVELS, T and G: ok.
MISCELLANEOUS:
- 255: Daily_Status, Site base, Thu 12-Feb-1998 08:39:04 AKST,
Wx: Cold, clear, light winds.
STATIONS: BAL down. Intermittent data gaps at FLA and ATL.
CLE eaten by ridge.
VOLTAGES/CURRENTS: ATL voltages decreasing. FLA good.
WINDS: ATL and FLA ok.
TRHP: T.plat higher than T.therm. at ATL.
4-COMP: ok.
LEVELS, T and G: ok.
MISCELLANEOUS:
- 256: TRH, Site all, Fri 13-Feb-1998 00:32:45 AKST, TRH Note
I note your recent comments that T.plat is higher than T.therm at Atl
and Fla. I looked back over the data from November and January and
see that for all stations T.plat - T.therm ranges from 0 to 0.2 C.
Steve Semmer reminded me that we had noticed and discussed this
difference previously.
The platinum element is the standard Vaisala 50Y temperature sensor and
is enclosed, along with the humidity sensor, in a porous shield
designed to protect the humidity sensor from contamination. The
operating range of the platinum sensor does not extend below -40C and
therefore we added the thermistor sensor to measure temperatures below
-40C. The thermistor is mounted external to the porous shield.
The laboratory calibration of both the platinum and thermistor sensors
is better than 0.1 C. We suspect that the platinum temperature sensor
is not dissipating its self-heating as effectively as the thermistor
sensor because the porous shield restricts the heat exchange with the
ambient air. One useful test of this hypothesis would be to remove the
porous shield from the hygrothermometer at Florida for a day or two.
However, this is not a top priority and could easily wait until Tony
is on site if you do not have time before he arrives.
Please add this explanation to the logbook as a separate entry.
Tom
- 257: Daily_Status, Site base, Fri 13-Feb-1998 16:43:59 AKST,
Wx: Cold, clear, light winds.
STATIONS: BAL down.
VOLTAGES/CURRENTS: ATL and FLA good.
WINDS: FLA ok. ATL samples.sonic decreasing.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: ok.
MISCELLANEOUS:
- 258: Visit_Log, Site 2, Fri 13-Feb-1998 16:50:10 AKST, Cleveland 0, Ice 1
Went to CLE to clean up after ridge activity. What appears to have happened
was a lead which had formed under the tripod overturned it onto the radiometer
arm, submerging the 4-component and freezing over. Later, this lead ridged,
bending the radiometer arm and toppling the tripod in the opposite direction,
toward the sonic arm. This motion tore the data cables from the eve sled and
bent the tripod. The total damage is unknown at this time.
Retrieved in apparently operational condition were the sonic unit, TRH, data
logger and eve sled. The central tripod post and some beams were retrieved.
The 4-component was recovered. Shields on the upward side were bent, but
the domes were intact. The pyranometer dome on the downward side broke
and both shields were bent.
Leads and ridges in the Cleveland area were still active while we were
on site.
- 259: Daily_Status, Site base, Sat 14-Feb-1998 09:26:20 AKST,
Wx: Cold, clear, light winds.
STATIONS: BAL down.
VOLTAGES/CURRENTS: ATL and FLA good.
WINDS: FLA ok. ATL samples.sonic bad, heat cycle increased to
10 minutes/ 110 minutes at 18:26.
TRHP: ok.
4-COMP: ok. Incoming pyran heavily frosted, incoming pyrge. lightly
frosted, outgoing pyran lightly frosted, outgoing pyrge. clean. Domes
cleaned 20:00.
LEVELS, T and G: ok.
MISCELLANEOUS:
- 260: Daily_Status, Site base, Sat 14-Feb-1998 18:13:28 AKST, Log for 15-Feb-1998 046
Wx: Cold, clear, light winds.
STATIONS: BAL down.
VOLTAGES/CURRENTS: FLA great. ATL declining. teg went out at FLA
during refueling at 21:00 and restarted, see site visit.
WINDS: FLA ok. Samples.sonic at ATL not improved, changed heaton to
15 min/110min at 3:15. ATL heaters changed back to 10 min/110min at
8:00 to avoid killing voltages overnight. Samples.sonic improved at
ATL with longer cycle, but did not stay clear. ATL cleared up at
19:00.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: ok.
MISCELLANEOUS:
- 261: Visit_Log, Site 4, Sun 15-Feb-1998 13:41:33 AKST, FLA
Changed propane. The left bottle's pressure fitting did not close when
removed from the bottle. Gas leaked out and I turned off the other
bottle. Swapped both bottles and the teg restarted on its own. (It went
out during the swap ~21:00)
Dug out sled. Replaced flashcard. Cleaned domes with ETOH. Sonics clean.
Fans and logger running.
The site is surrounded by wind-blown, hard packed drifts, 1-3 ft high.
- 262: Daily_Status, Site base, Mon 16-Feb-1998 11:26:34 AKST,
Wx: Cold, clear, light winds.
STATIONS: BAL located on the farside of a large, new ridge, over a mile
from the original site. Ridge formed through the CRRL snowline at that site,
but did not damage any PAM equipment. PAM sonic is oriented northward,
the ridge runs NW-SE to the N of the site. The ridge is 200ft from the
site and 6-10 ft at its highest point.
VOLTAGES/CURRENTS: FLA great. ATL ok.
WINDS: FLA good. ATL tcounts bad, turned heaters on at 20:40 to try
to clean them. The cleared around that time, though it doesn't look
like the heaters had anything to do with it. Heaters reset to normal
10/110 cycle at 21:45.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: ok.
MISCELLANEOUS: Shebop shutdown from 17:00-18:00 for ship power problems.
- 263: Daily_Status, Site base, Tue 17-Feb-1998 01:43:42 AKST,
Wx: Cold, clear, light winds.
STATIONS: BAL visited and restarted.
VOLTAGES/CURRENTS: FLA great. ATL ok.
WINDS: FLA good. ATL tcounts bad, turned heaters on from 8:00-10:00.
Tcounts seems to improve before the heaters were turned on and starts
going bad when they are turned off.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: ok.
MISCELLANEOUS:
- 264: Visit_Log, Site 3, Wed 18-Feb-1998 01:30:37 AKST, BAL site visit
BAL refueled. Teg restarted with Rocket after trying Otten method.
The teg died several times but was restarted immediately. Nozzle changed,
old nozzle quite blocked. Battery changed. Flashcard changed. No box
fan present. Cleaned sonic heads, fans and radiometer domes. 4-comp
fan is a four port with only the pyran.s attached. Dug out teg box. Eve,
fans and logger started. Flashcard not being written to.
The BAL site is surrounded by fairly level, hard, windblown snow. A ridge
has formed running NW-SE, to the N of the site. The ridge at its closest,
200 ft from the site and 2-3 ft high. The areas to the N and E
of the site have many small ridges and leads. The areas S and W are apparently
undisturbed.
- 265: Daily_Status, Site base, Wed 18-Feb-1998 08:27:43 AKST,
Wx: Cold, clear, light winds.
STATIONS: BAL communications improved over last operational period, possibly
due to rotating the ship around the antenna.
VOLTAGES/CURRENTS: FLA great. ATL ok. BAL good, Vteg and Vbat stabilizing.
WINDS: FLA good. ATL bad. BAL went bad, turned heaters on 18:15, 10min/110
minute cycle.
TRHP: ok.
4-COMP: ok.
LEVELS, T and G: ok. BAL levels bad, level by hand, ok.
MISCELLANEOUS: A large lead opened up overnight running N-S to the W of
the ship. From the air it is estimated to be 0.25 mile wide and 15 miles long.
The site formerly known as Cleveland is now known as Lake Erie.
- 266: Daily_Status, Site base, Thu 19-Feb-1998 19:31:26 AKST,
Wx: Cold,somewhat cloudy, moderate winds.
STATIONS: Cleveland was dismantled last Saturday and the bones are stored in
cold hut. I will inspect them soon to see about salvage .
VOLTAGES/CURRENTS: FLA is ok. BAL good, Atl is marginal The effect of two-
hourly sonic heaters is apparent.
BOX TEMPS: All operating systems declined from ~25 to ~ 15degreeC
SONICS: FLA good all time. ATL and BAL irregular until ~1800 when sample level increased to ~100% Bal heater turned on for one hour at 1900
When Tcount < 99% then u and v noisy
When Tcount > 99% then u and v smoother
Even more pronounced effect with w
PRES: Atl, Bal and Fla all equiv
TRHP: Atl and Bal similar, Fla Rh lower
4-COMP: Fla domes were cleaned at ~1200 AKST .Effect seen on R.pile.in. Tdome
and Tcase look OK
T and G: ok.
LEVELS and COMPASS: Effect of heater on compass. From compass data apparently
Bal position changing wrt others.
Bal level still bad
MISCELLANEOUS: Lead west of ship has iced over..
- 267: Daily_Status, Site base, Fri 20-Feb-1998 17:52:23 AKST,
Wx: Cold,somewhat cloudy, moderate to strong winds.
STATIONS: Inspected Florida in order to decide how to replace Gill sonic
with ATI sonic and how to disconnect and bring the four component radiometer
array into the ship.
Inspected the Cleveland tripod/radiometer boom. The rebuild could possibly
be mostly be done here at Shebaship with only a few pieces brought from Boulder.
VOLTAGES/CURRENTS: Again FLA is ok. BAL good, Atl is marginal The effect of two
hourly sonic heaters is apparent.
BOX TEMPS: All boxes in range 13 to 22 degreeC
SONICS: Flor and Balt have good sample %, Atl range from 60% - 100%
u and v Flo and Bal smooth Atl ragged
w Flo and Balt OK, Atl mostly out of range +ve
PRES: Atl, Bal and Fla all equiv
T: Bal Ttherm and Tplat very similar, Atl and Fla Ttherm 0.05 lower than Tplat
RH: Fla RH 2% lower than Bal and Fla RH, generally same form
4-COMP: sw albedo should be ~95% but Balt shows ~ 70%. Maybe effect of only
upper dome icing.
lw Fla showed -60 Wm-2 from last evening
The top domes and cases are systematically ~0.1 degreeC cooler than the bottom
domes and cases.
(Fla upper domes cleaned at 1425 AST on 20 Feb)
T and G: ok.
LEVELS and COMPASS: Effect of heater on compass. From compass data apparently
Again Bal position changing wrt other two stations
Bal level still bad
MISCELLANEOUS: Did inspection of Fla to look at cabling of sonic and four
component radiometer array. NB the fan in the four comp ventilator still
running
- 268: Base_Software, Site base, Sat 21-Feb-1998 07:31:42 AKST,
2/20 ~22:00
Installed latest software upgrade, which includes sonic heater
control based on tcount.
2/21 ~16:30
Remotely changed heaton=300 and heatoff=3600 at Atlanta, Florida,
and Baltimore.
- 269: Daily_Status, Site base, Sat 21-Feb-1998 08:59:40 AKST,
Wx: Cold, 8/10 stratos and cirrostratos, moderate to strong winds.
STATIONS: Friday, 20 Feb, evening at ~1600 AST there were hull sounds
as the ice moved. A new crack opened along the line of the pressure ridge
between the ship and Ocean City. A party went out in the evening to move
a barrel store away from the crack, but the crack has not widened further.
VOLTAGES/CURRENTS: The new software for the sonic heater became active at
~1300 AST on Friday See logbook entry # 268. Jeff is still modifying
the parameters
BOX TEMPS: All boxes in range 13 to 22 degreeC. The effect of our visit
to Fla when the lid was opened at 1300AST is apparent
SONICS: At 0930 AST a down spike in sample% for all three stations. This was
probably due to the loading of new software on Pampoll.Except for an early
period for Atl sample% were 100 for all three stations
u and v all stations OK
w all stations OK
PRES: Atl, Bal and Fla all equiv
T: Bal Ttherm and Tplat agreement still better than for Atl and Fla
RH: Fla RH still systematically lower than Bal and Fla RH,
4-COMP: sw incoming now exceding 100 Wm-2 and plot needs to be rescaled.
lw Fla showed -60 Wm-2 from last evening
Effect of icing especially on Atl and Bal
Both Dome and Case of the .out (bottom sensors) are systematically warmer than
the Dome and Case of the .in (top sensors)
T and G: ok.
LEVELS and COMPASS: Effect of heater on compass. From compass data apparently
Bal position now varying in a manner similar to other two stations
Bal level still bad
MISCELLANEOUS: I would like some additional plots. eg H and L, Tsky and Tsurf
- 270: Rad_System, Site 4, Sat 21-Feb-1998 15:20:36 AKST, Florida rad-array removal
Visited Florida
At ~1300 AST disconnected the fan and ventilator power (NB the ventilator fan
was running until disconnected). The four radiometer cables were disconnected.
In the Met Bldng inspected rad-array and removed rad shields. The entire
plenum spaces were completely packed with snow. Thus there was no ventilation
provided by the system.
Any deicing would have been solely due to the effect of the heaters under the
inner edge of the ventilation slot.
I fitted the array into the carrying case and returned with the case to the
PAM room.
POWER BUDGET:
Single fan in fourplex ventilator: 12 vdc X 0.22 amp = 2.84 Watt
Each rad heater:3 x 33 ohm resisters in series = 100 ohm,
4 x (12 x 12)/100 = 4 x 1.44 Watt = 5.76 Watt
Total ventilation + heating power = 2.84 + 5.76 = 8.6 Watt.
POSSIBLE FUTURE ACTIONS
I will determine how much wattage is available and will consider whether
to abandom ventilation and to put all available power into heating
- 271: Base_Software, Site base, Sat 21-Feb-1998 19:11:09 AKST, Changed heaton=5 and heatoff=3600 at ATL, FLA, BAL
2/22 ~04:10
Remotely changed heaton=5 and heatoff=3600 at Atlanta, Florida,
and Baltimore.
Still investigating problem with Florida where the sonic heaters cycle
on and off every 5 minutes.
- 272: Thermal_Generators, Site 4, Sun 22-Feb-1998 09:26:51 AKST, Florida Tevebox problems
On satureday and into sunday we have had a temperature problem at Florida
evebox.
At 1300AST I removed the rad array reducing the electrical load by ~8.6 W
At 1900AST it began to snow
At 2200AST it was noted that the Tevebox had started to climb and was
approaching 57 degrees.
I went to Florida, reconnected a 9 W load (Clevelands ventilator and heater,
and also opened the TEG box. I shoveled free the sled and cleaned off the flue.
The box temp dropped to -8.8 and then began to climb again. By 0500AST sunday
it levelled out at 45 degrees.
- 273: Daily_Status, Site base, Sun 22-Feb-1998 09:34:59 AKST, Daily_Status
Wx: Began to snow Saturday evening. Somewhat warmer
STATIONS: On evening of Saturday, 21 Feb the Florida TEG box began to overheat
(See logbook # 272).
VOLTAGES/CURRENTS: Atlanta voltages are low at ~12VDC
Bal is fairly steady at 13 VDC
Fla showd variations due to the T problem but is generally 13 to 13.5
BOX TEMPS:Atl and Bal Tbox both increased from ~15 to ~30 degrees
Florida made the large excursions described in #272 but otherwise
increased from 25 to 45
SONICS:Sample % for all staions 100
u and v all stations OK
w all stations OK
PRES: Atl, Bal and Fla all equiv
T: Bal Ttherm and Tplat agreement still better than for Atl and Fla
RH: Fla RH still systematically lower than Bal and Fla RH,
4-COMP: Fla rad array removed at 1330 AST and brought into ship.
The effects of icing give a value of albedo of 1.2 at Atl
Atl show all four temps to be equal This is reasonable given the
weather, windy, no sun, low overcast. Bal shows lower sensors to
be a degree or so warmer than upper.
T and G: OK
LEVELS and COMPASS: At 0100 - 0200 all station showed a jolt? At 0400 Fla
changed heading by ~ 3 degrees
MISCELLANEOUS:
At Fla there were problems with overheating which may have been
associated with the removal of the rad array or may have been due
to TEG malfunction
- 274: Visit_Log, Site 1, Sun 22-Feb-1998 13:04:26 AKST, Atlanta visit
At ~1030 - 1130 AST Atlanta was visited.
Fresh snow. No significant lead activity or ridge formation
The TEG box was dug free of snow and the air holes in the base of the box
were reamed.
The propane was resupplied.
A new (Cleveland's burner with a cleaned nozzle) TEG burner was installed
and a flash card replaced.
The sonic anemometer was inspected. Dispite the frost covering the sonic
assembly the tips of the transducers were clear of ice. The ends of the
transducers appeared as small black discs. I cleaned away the bulk frost.
The TRH was inspected. The fan was running and the intake was not blocked
by frost. I cleaned away frost from the intake tube.
The rad array was completely frosted over with frost on all four domes.
The frost was heavier on the top domes. The ventilator/heater on Atlanta
is a quad ducted single fan with a heater resister ahead of the fan. The
two ducts to the sw radiometers were disconnected and the two ducts to the
lw radiometers were wrapped in yellow tape. The fan was running but on
inspection of the radiometer ventilation slots there was no evidence that
any air was getting through. I cleaned the frost from the four domes using
hand warmth
From the evidence the ventilation is a complete failure
- 275: Daily_Status, Site base, Mon 23-Feb-1998 08:33:04 AKST, Daily_Status
Wx: Warm (-25C) with light snow
STATIONS: Cleveland remains dead, Atlanta was serviced yesterday, Florida is
visited daily, and Baltimore will be visited in a few days..
VOLTAGES/CURRENTS: Atl voltage increased only a small amount on servicing.
However the current increased from 1.3 to 1.7 amp
Baltimore maintained steady and respectible
Florida OK
BOX TEMPS: All boxes behaving well. the Temperaures climbed with outside
temperature and are ~ 40 C
SONICS:Sample % for all staions 100 with slight variation
u and v all stations OK
w all stations OK
PRES: Atl, Bal and Fla all equiv
T: Bal Ttherm and Tplat agreement still better than for Atl and Fla
RH: Fla RH still systematically lower than Bal and Fla RH,
4-COMP: Atl showing the effect of deicing, more difference between in and out.]
T and G: OK
LEVELS and COMPASS: At 0900 Sunday Florida showed a 2 degree movement. (Station
settleling?)
MISCELLANEOUS: We made a site visit to Atlanta from 1030 - 1130
- 276: Daily_Status, Site base, Tue 24-Feb-1998 08:26:38 AKST, Daily_Status
Wx: Light snow and reasonably warm (-25) until evening then clouds cleared
and temperature dropped. In the night the local camp lead opened a meter or so.
STATIONS: .
VOLTAGES/CURRENTS: All voltages OK. Atl voltage still climbing slowly.
BOX TEMPS: All boxes behaving well with temps between 15 and 30C
SONICS: The effect of the new sonic heater software is apparent. The heaters
come on when signal% drops due to icing. The signal% is then restored
PRES: Atl, Bal and Fla all equiv
T: ok
RH: Fla RH still systematically lower than Bal and Fla RH,
4-COMP: The effect on lw.in of the clearing of the cloud layer very apparent.
Florida still out of comission undergoing modifications
T and G: OK
LEVELS and COMPASS: ok
MISCELLANEOUS: Camp lead opened a meter or so in the night.
- 277: Rad_System, Site 4, Tue 24-Feb-1998 13:18:22 AKST, Replaced Rad Array at Florida
Between 1130 and 1200 AKST I visited Florida and made changes.
TEG box:
Briefly opened box and disconnected internal ventilation fan
.
Radiometer array
The Rad Array had been modified in the PAM room. The previous ventilation/heater
consisted of a single fan in a fourplex ducted housing with only ducts to the
pyrgeometers and a daisy chain of three x 33 ohm resisters (1.4 W / radiometer)
under the rad shields. The system was completely non-effective. The array was
modified to have a daisy chain of 6 x 10 ohm resister (2.3 W / radiometer) atop
the rad shield fairly near the base of the domes. Larger holes were bored in
the housings to accomodate the new singleton ventilators but the new ventilators
were not yet installed. (These tests will be done later this week)
The rad array was reinstalled and cabled. (The level
lock had previously been left fastened. This time it was removed)
TRH:
I removed the coaxial intake, knocked out the frost, removed the Goretex
membrane cap, and then reinstalled the coaxial intake.
1/28/99 Changed Site number from 3 to 4 - twh
- 278: TRH, Site 4, Tue 24-Feb-1998 13:54:01 AKST, Removed Gortex membrane of TRH at Florida
Between 1130 and 1200 AKST I visited Florida and made changes.
I removed the coaxial intake, knocked out the frost, removed the Goretex
membrane cap, and then reinstalled the coaxial intake.
- 279: Daily_Status, Site base, Wed 25-Feb-1998 09:39:17 AKST, Daily_Status
Wx: Clear sky, cold but no wind. Pleasant condition for working .
STATIONS: Visited Florida to replace modified rad array.
VOLTAGES/CURRENTS: Voltages OK. The load on Florida increased from 1.05 to 1.15
amp when the new heaters replaced the stand-in Cleveland Vent/heater
BOX TEMPS: All boxes behaving well with temps between 20 and 35
SONICS: The "only when required" sonic heater scheme is working well. The
number of times per day the heaters activated: Atl = 15, Bal = 6, and Fla = 6.
u and v ok, w ok
PRES: Atl, Bal and Fla all equiv
T: At 1130 AKST, during the Fla visit, I removed the Goretex membrane shield
from the Fla TRH sensor. An iplot later showed that the response of the two
sensors changed from T.plat > T.therm (0.1 C) to T.plat < T.therm (0.05 C)
RH: No significant change after Florida TRH was changed by removal of
membrane cap
4-COMP: After reinstallation of the Fla radiometers several hours were requiredto thermally re-equilibrate
There is a problem with Rsw.out > Rsw.in during the afternoon, and Rsw.out
= -20 Wm-2 for a period in the nighttime.
Albedo plot shows problem with Rsw. I will check the cable connector correctness
Tsurf for Fla ~ for Atl and Bal. Tsky for Fla ~ 5 C colder than for Atl and Bal
T and G: OK
LEVELS and COMPASS: Fla lev x within 1/4 degree of true, lev y within 1/2 degree
MISCELLANEOUS: Visited Fla at 1100-1200 AKST. Newly opened crack required
use of bridge.
- 280: Rad_System, Site 4, Wed 25-Feb-1998 12:46:53 AKST, Visit to Florida
Between 1115 and 1200 AKST visited Florida to check rad array.
Checked cable connection for correctalignment and for tightness. OK
There was a light frosting on the top domes. Single lacey crystals,
millimeters apart,and the size of sugar crystels. The lower dome were
less frosted. There was no indication that the resister heaters were
having any effect. There was no absence of crystals near the individual
resisters.I did not remove the frost from the domes.
The sun was only two fingers above the horizon and I could not
perceive any shadowing by the plastic stand-offs and the daisy chain
I measured the dimensions of the TEG box opening:
5 3/4" high and 8 1/4" long
Later the TRH was replaced with the spare. The Goretex cap was on the sensor
element and was not removed.
- 281: Sonic, Site 4, Thu 26-Feb-1998 07:48:11 AKST,
2/26 16:47gmt
Changed heaton=5, heatoff=3600 in Florida's TRH for sonic heater
control.
- 282: Daily_Status, Site base, Thu 26-Feb-1998 08:47:52 AKST, Daily_Status
Wx: Clear sky, cold. Cloud arrived in late afternoon, wind increased. falling
snow or blowing ground snow
STATIONS: Visited Florida several times, to check radarray and then to
install ATI and to try to get ATi to operate.
VOLTAGES/CURRENTS: Voltages OK. The load on Florida increased from 1.05 to 1.15
amp when the new heaters replaced the stand-in Cleveland Vent/heater
BOX TEMPS: OK
SONICS: Atl and Balt OK, Florida swapped Gill for ATI, ATI not working
PRES: Atl, Bal and Fla all equiv
T: The new TRH was deployed with the Goretex membrane in place
RH: Abrupt change in Fla RH at 1630 AKST when TRH unit changed
4-COMP: Fla pile.in 2 x to 3 x greater than for Atl or Bal
Tsky Fla is considerably colder than for Atl and Bal
Fla Rsw.in < Rsw.out
Albedo for Bal is good, for Fla is bad (>1) and for Atl does not vary properly
I have checked the cable correctness. I will check in-housing connector next
T and G: OK
LEVELS and COMPASS:ok
MISCELLANEOUS: Visited Fla four times Newly opened crack frozen over
but fresh ice has developed some cracks
- 283: Gill_Sonic_Tests, Site 4, Thu 26-Feb-1998 17:48:02 AKST, ATI installation at Florida
On Wednesday,25 Feb Jeff opened the ATI boom to check on the internal circuitry.
The flat connector on the internal circuit board was loose. The conector was
reaffixed and we took the ATI out and remounted it on the Florida sonic boom.
Again no response.
Today, Thurs, 26 Feb we brought the ATI and eve into the lab. Again it was
discovered that the connector was loose. This time a cable tie was used to cinch
the connector tight. Also several test points were definately pushed out of
accidental contact range. At ~1330 - 1400 AKST the ATI was reinstalled and it
worked!!!!!!!!!!
Iplot of winds, u,v and w indicate that it is behaving.
- 284: TRH, Site 4, Thu 26-Feb-1998 17:56:40 AKST, Removed Gortex membrane of TRH at Florida
Yesterday, 25 Feb when the TRH was replaced with the spare TRH the Goretex
cap was left in place. Today, 26 Feb at ~ 1400 AKST when the ATI was sucessfully
deployed, the Goretex cap was removed from the newly installed TRH.
- 285: Daily_Status, Site base, Fri 27-Feb-1998 08:16:08 AKST, Daily_Status
Wx:
STATIONS: .
VOLTAGES/CURRENTS: Voltages OK. Currents ok
BOX TEMPS: Box temps in Atl and Bal climbing. to high 40's
SONICS: Atl and Balt OK, Florida ATI now working
wbar 's are not = 0.0
PRES: Atl, Bal and Fla all equiv
T: The Goretex cap was removed from the newly installed TRH.
Before removal T.plat > T.therm (0.1C)
After removal T.plat < T.therm (.0.05C)
RH: Starting at noon (visit time) Fla RH disagree with pattern for Atl and Balt
4-COMP: All three stations show believable Rsw out and in. Albedos 0.9 - 0.95
All three stations show similar patterns for pile responses
This could be due to the lack of frost. On Florida it was noted that frost
had sublimed away.
T and G: OK
LEVELS and COMPASS:ok
MISCELLANEOUS: Visited Fla twice. Local 2 meter wide lead which had frozen over
was subjected to 23 m lateral movement and reopened in places. Bridge
repositioned
- 286: Rad_System, Site 4, Fri 27-Feb-1998 12:24:34 AKST, Ventilators on radarray at Florida
1100 - 1200 AKST took Florida rad array to the Met hut and working atop
wooden crate outside the door, removed the resister daisy chain rad shield.
There was a light covering of snow on the top of the radiometers. The snow
just next to the resisters showed a slight indication of the effect of the
heating. There was some snow inside the housings.
Attached the 1 3/8" fan ventilators and routed the wires out through small
holes in the metal tape sealing the nipples. Replaced the wide ventilation
slot radiation shields. Reinstalled the Array on the end of the beam and
recabled. The fans made a screeching noise.
1300 AKST went to check ventilation. All fans stopped. TRH fan still running.
Removed Micronel ventilatops and returned to lab. Rebuilt ventilator using
2 Rotron and 2 Nidec fans. At 1600 AKST returned to Florida and installed
ventilators. The fans didnt start. Checked voltage on fan plug. Zilch
Did iplot of load. The load ihad ncreased after the Micronel fan ventilators
were installed and then a fuse blew. The Campbell data logger also quit.
At 1645 AKST replaced fuse in Eve box. The fans started and the Campbell
also came back online...
- 287: Daily_Status, Site base, Sat 28-Feb-1998 08:37:25 AKST, Daily_Status
Wx: Cloudy in AM clear sky in PM, warm, -18 - -20 C light wind
STATIONS: .I visited Florida 4 times
VOLTAGES/CURRENTS: Voltages OK. Currents ok, Fla power showed the effect of
changes in the ventilator arrangement..Power was down for Fla Campbell
from 1130 - 1600 AKST due to Micronel fan seizure
BOX TEMPS: Box temps in Atl and Bal max"d at 48 C and then cooled to 40 C
SONICS: All three station show perfect 100% sonic sample rate. NB the ATI
software must have just kicked in today to show !00% rather than 50%
PRES: Atl, Bal and Fla all equiv
T: ok
RH: ok
4-COMP: Fla had some snow on theupper domes. The heater did not work.
The radiometer responses look good
T and G: OK
LEVELS and COMPASS:ok
MISCELLANEOUS: Visited Fla four times. Local lead still active
- 288: Visit_Log, Site 4, Sat 28-Feb-1998 11:06:45 AKST, Visit to Florida
Between 1000-1100 AKST visited Florida:
Propane cylinders changed
Snow removed, vent holes reamed, the metal cover for the vent louver removed.
Flash card exchanged.
The radiometer fans were all running. However the proportion of air emerging
from the ventilation slot was estimated to be only 10% of the volume
blowing back from the front face of the fan. Smoke blown into the center of
the front face of the fan mostly blew back from the fan, but some did emerge
from the slot. The airflow could just be sensed by a bare hand above the dome,
- 289: Daily_Status, Site base, Sun 01-Mar-1998 08:57:47 AKST, Daily_Status
Wx: Cloudy , warm, -20 C,light wind
STATIONS:Site.visit Florida
VOLTAGES/CURRENTS: Voltages OK. Currents ok, Fla voltage improved after
the site visit.
BOX TEMPS: Box temps in Atl and Bal 40C. As the result of removing the
louver cover Fla stabilized at 25 C, 10 degrees lower
SONICS: All three station show perfect 100% sonic sample rate.
Fla w variation looks smaller than others
PRES: Atl, Bal and Fla all equiv
T: ok
RH: o
4-Component Rad. The Atl and Bal radiometer responses look good. Fla Rsw.out
has neg offset and is ragged- Bad connection possible because of the work
on the ventilator.
More work on Fla ventilators
T and G: OK
LEVELS and COMPASS:
MISCELLANEOUS: Site visit to Fla. See Logbook # 288
- 290: Rad_System, Site 4, Mon 02-Mar-1998 09:03:23 AKST, Rad array removal
At ~ 1400 AKST on Sunday 01 Mar the Fla rad arry was taken down for
modification work on the ventilation.
Also for the last day and a half, the Rsw.out had shown a negative offset
and a ragged signal. A check of connectors at 1000AKST had had no effect.
- 291: Daily_Status, Site base, Mon 02-Mar-1998 09:07:45 AKST, Daily_Status
Wx: -20 C,light wind
STATIONS: Dean and Jay went out to look for Bal. They couldnt get to it.
Fresh leads and open leads. They may look again on Monday.
VOLTAGES/CURRENTS: Atl voltage > 12 Vdc. Effect of removal of rad array
from Fla very apparent.
BOX TEMPS: Box temps in Atl and Bal 30 - 35 C, Fla 20 - 30 C
SONICS: Sample% 100% on stations 100% until 2300 AKST, when fog? or cloud
appeared. Then Bal and Atl required heater kick-ins. ATI at Fla did not
require heater kick-in.
w for Bal and Atl apparently increased with onset of frosting.
PRES: Atl, Bal and Fla all equiv
T: ok
RH: Fla showed large increase in RH only at Fla between 1800-2400 AKST
4-Component Rad. Good looking response from all radiometers except Fla Rsw.out.
Attaempted to cure by re plugging connector at ~1200. There was no effect.
At 1500 AKST removed Fla radarray to make modifications to ventilatoe
T and G: OK
LEVELS and COMPASS:ok .Possible divergence of Bal
MISCELLANEOUS:
- 292: TRH, Site 4, Mon 02-Mar-1998 16:01:23 AKST, Reinstallation of Goretex membrane on TRH Fla
At ~ 1330 AKST the Goretex membrane cap was reinstalled on the TRH
at Florida.
Later iplot showed that:
prior to reinstallation T.therm > T.plat
after reinstallation T.therm < T.plat
This effect has been well demonstrated now by three separate cap switches.
- 293: Daily_Status, Site base, Tue 03-Mar-1998 08:56:40 AKST, Daily_Status
Wx: -205C,light wind, sunny in morning and also in late afternoon
STATIONS: At 2230 AKST 2 Mar to 0900 AKST 3 Mar the data poling was interupted.
The qsee program did not acquire the data but apparently the system recovered
and the iplot routine later obtained access.
NB the RH and T from Atl was not recovered. It may be on the flash card.
Atlanta voltage is dangerously low - good for another 12 hours
VOLTAGES/CURRENTS: Atl voltage 11.7 Vdc..and will reach 11.5 soon
BOX TEMPS: OK
SONICS: Sample% 100% looks perfect on Fla ATI. Heaters functioning well on
Atl and Bal
u,v and w signals all have more variance for Atl and Bal than for Fla (ATI).
PRES: Atl, Bal and Fla all equiv
T: At 1330 AKST I replaced the Goretex membrane cap at Fla. Result apparent.
See logbook #292
RH: Rh and T's missing for Atl for back poling interval (may be on flash card)
4-Component Rad. Albedo shows >1 for Atl some of the time. Balt looked good.
Tsky and Tsurf looked resonable
T and G: OK
LEVELS and COMPASS:ok .
MISCELLANEOUS: During afternoon the camp lead first opened to 3m and the later
closed and formed a ridge. The camp moved to the south
- 294: Daily_Status, Site base, Wed 04-Mar-1998 08:33:08 AKST, Daily_Status
Wx: -20 C,light wind, sunny in late afternoon
STATIONS: At ~1300 AKST Atlanta ceased to send data. Baltimore is still
going strong
VOLTAGES/CURRENTS: OK except Atl which fell to 11.7 vdc at ~1300 when the
station failed.
Fla imax charge exhibiting peculiar periodic spiking. Maybe due to the
battery being fully charged and the load being low?
BOX TEMPS: Without louver cover plate Fla temp stable at 20 - 26 C. Balt
temp 36 C and Atl ~30 C
SONICS: Sample% 100% for all stations).
PRES: A slight systematic bias, Atl > Fla > Bal 0.2 mbar range
T: ok
RH: There is a systematic bias in the RH's , Fla > Bal > Atl 3% range
4-Component Rad. Balt looks good
T and G: Sinusoidal variation of snow temp at Fla
LEVELS and COMPASS:Balt compass bearing variation different from thatof Fla.
MISCELLANEOUS:
- 295: Visit_Log, Site 2, Wed 04-Mar-1998 15:14:25 AKST, Ghost of Cleveland
2/3 ~22:00gmt
Visited remains of Cleveland near the cold storage hut here in camp.
Installed rebuilt TEG burner that had been removed from Atlanta.
Added one partial tank of propane.
Plan to test TEG and EVE for day or two. No cables or instruments
(other than pressure sensor) attached.
- 296: Visit_Log, Site 3, Wed 04-Mar-1998 15:19:04 AKST, Baltimore site visit
2/4 ~20:30gmt
Visited Baltimore. Changed propane and flashcard.
Changed TEG nozzle. Voltages were still good, but nozzle face was
quite dirty.
Exchanged bad compass/beacon cable adapter with a good one. Beacon
now works.
Removed and brought the 4-comp level sensor back to the ship for
diagnosis.
Removed light frost from sonic supports. No frost on heads.
Removed light frost plug from TRH intake.
Upwelling pyg dome was clean. Downwelling pyg dome had light frost on
it. PSP domes were more heavily frosted. Thanks to warmer outdoor temps, was
able to melt all dome frost off with palm heat.
Removed pyg sun shields. No snow inside, but some hard frost. Frost
mostly occluded the annular opening between the sun shield and the pyg case.
Removed this frost.
Did not bother cleaning frost from inside of psp ventilation housings
because 4-port fan only has corregated tubes to pygs. One tube doubled over
blocks the other two ports. (Atlanta is the same way. The
small ventilation proved not to keep the psp domes clear of frost anyway, so
all available ventilation was put toward the pygs in November, when
the sun was not up anyway. The ventilation tubes are not quite long enough
so that if all 4 are attached to the housing nipples, they're subject to
falling off. This is partly due to the fiberglass wrap around the corrugated
tubes getting in the way.)
Removed louver cover plate. Pulled 4x2 PVC adapter out from 4" PVC
elbow leading into sled box. Thoroughly dug out sled box and cleaned frost
from bottom vent holes.
Checked to see that Flashcard was being written to after changing it.
Sunday's scouting trip to Baltimore was turned back by a lead when they
were most of the way there. Monday's trip was turned back within a mile by a
new lead. Tuesday's trip was successful in finding a circuitous route, thanks
in part to help from the captain. The captain could see Baltimore through
binoculars from the ship's bridge and so directed the scout team to Baltimore
when they were near, but could not see it due to numerous pressure ridges.
Today, Wednesday, we made the successful service trip.
The route to Baltimore crosses dozens of fairly recent leads and
pressure ridges. I can't tell which are a week old and which are a month old,
but very few of them existed in the fall.
There's a major ridge a few hundred yards N of Baltimore. It varies
in height from a few feet to 15-20'.
- 297: Rad_System, Site 4, Wed 04-Mar-1998 16:17:12 AKST, Large fan ventilator for rad array Fla
The ventilation system for the Fla rad array was modified and the array was
reinstalled at 1500 - 1530 AKST 4 Mar.
In each housing, a large (2 in" high and 2 1/2" wide) hole was milled. (This
was done by the Des Grosseilliers' shop). A 2 1/2" x 2 1/2" square Nidec fan
(50 ma / 0.6 W startup, 40 ma / 0.5 W run ) was fitted externally to the hole
using metal/cardboard from a juice container and duct tape. A 5" long, 2 1/2"
cowl made from the same material was attached to the intake of the fan.
These Nidec fans have a good history of cold weather endurance. They have been
operating in the old ventilator housings continuously for several months.
Similar Rotron fans are used in the TRH system (the 7 bladed Nidec have a
slightly greater power requirement than the 5 bladed Rotron and has
a slightly greater volume flow)
The modified ventilated radiometer array was reassembled and put back on Fla.
The iload increased by 0.6 amps ~ 7.2 W
Cigarette smoke showed that there was no back-flow and, on under the calm
wind condition, air flow could be sensed on the palm of the hand up to 5"
above the dome. For comparison, the line power ventilator for the ARM
PSP and pyrgeometer yielded ventilation which could be sensed 5-6" above the
domes.
Checked the fans at 1800 AKST. Still operating.
- 298: Daily_Status, Site base, Thu 05-Mar-1998 08:40:53 AKST, Daily_Status
Wx: light wind,
STATIONS: Cleveland operating in camp, Baltimore visited in late morning, Bal
data transmissions show drop-out in nighttime
Rad array replaced at Fla, Atl still not sending data
VOLTAGES/CURRENTS: Effect of reinstalation of radarray at Fla - iload increased
by 0.6 amps ~7 W. Fla vdc bat dropped from max tinto the 13 vdc range
Bal sonic heater active in night. Frosting conditions
BOX TEMPS: Cle fell to -20 when propane ran out . Cle and Fla stable at 20 C
SONICS: Sample% 100% for Fla, Bal shows effect of frosting plus heater
in nighttime.
U and v good at Bal and Fla
w much greater at Bal during nighttime.
PRES: Pressure ok at Cle, Bal and Fla
T: ok
RH: High RH at Bal in early night. High RH at Fla in late night.
Could be local effects due to open leads
4-Component Rad. Albedos Both Fla and Balt look good ~ 0.9
Tsur/sky both look ok
Tcase.in/out Tdome .in either hidden by Tdome .out (Fla) or missing?
T and G: ok
LEVELS and COMPASS:Fla levels off 2 degrees- due to reinstallation of rad array
MISCELLANEOUS: Bal tc made a jump during visit
- 299: Visit_Log, Site 1, Thu 05-Mar-1998 12:45:15 AKST, Atlanta site visit
2/5 ~20:00 Visited Atlanaa. Changed propane and flashcard.
Changed TEG nozzle. Nozzle face was quite dirty.
Removed light frost from sonic supports. No frost on heads.
Removed light frost plug from TRH intake.
Removed radiometers and mount to bring into ship. The ventilation tubes are not quite long enough so that if all 4 are attached to the housing nipples, they're subject to falling off. This is partly due to the fiberglass wrap around the corrugated tubes getting in the way.)
Removed louver cover plate. Open slightly. Thoroughly dug out sled box and cleaned frost from bottom vent holes.
Unable to use Rocky. TEG started right up after opening valve. Checked with Tony on ship to make sure Atlanata was running
The route to Atlanta crosses 2-3 of fairly recent leads and
pressure ridges. None were all that difficult to navigate. Foggy off and
on during operations where we couldn't see the ship. Cleared up nicely for our
return trip. There were some very large chunks of ice pushed up on top of the ice on our way out. Jay, Jeff, Dan, and Pat (3 snow mobiles).
- 300: Rad_System, Site 4, Thu 05-Mar-1998 16:28:07 AKST, Possible misidentificationFla Rad array
Florida is station 4. However the radiometer array at Florida is
designated Station 3. It has been thus, at least, since I arrived on 19 Feb 98
Atlanta is station 1. The Atlanta radiometer array is designated Station 1
- 301: Daily_Status, Site base, Fri 06-Mar-1998 08:40:28 AKST, Daily_Status
Wx: Cold occasional fog, with frosting conditions
STATIONS: Visit to Atlanta (see 299) Cleveland running on battery
VOLTAGES/CURRENTS: Atlanta voltage increasing after visit. Bal and Fla stable
Cleveland battery down to ~12 vdc
BOX TEMPS: Fla ~ 20 C but Bal and Atl down to 0 C
SONICS: Fla ATI completely frosted over with wispy frost. The sample% remained
at 100%. The heater did not activate because there was no activation signal
u and v similar at all three stations
w for Fla much smaller than for Atl and Bal.
PRES: Pressure ok at Cle, Bal, Atl and Fla
T: ok
RH: ok
4-Component Rad. Atl rad array is aboard ship being fitted with new ventilation.
Bal and Fla look ok
Albedos Fla and Bal ok
T and G:Although Tsoil at Fla is 5 C colder than Bal and Atl inspection of last
several weeks indicates that this is not due to trampling
LEVELS and COMPASS:Fla levels off 2 degrees
MISCELLANEOUS: Camp lead opened at ~0500 AKST 6 Mar It spread to ~6m. Seal sighted
- 302: Daily_Status, Site base, Sat 07-Mar-1998 08:48:28 AKST, Daily_Status
Wx: Cold and clear,,
STATIONS:
VOLTAGES/CURRENTS: Loads:Atl ~ 0.6 amps, Bal and Fla both ~ 1.1 amps
Bat volts: Bal ~ 13.5, Atl ~ max, Fla ~ 14
BOX TEMPS: Fla ~ 10 C, Balt and Atl between 0 and 5 C
SONICS: Atl, Bal and Fla sample% = 100% costantly.
PRES: ok
T: For Atl and Fla, Tplat > Ttherm (0.2 C). For Bal, Tplat ~ Ttherm (0.05 C)
RH: ok
4-Component Rad. .Bal and Fla look ok
Albedo Fla > albedo Bal. Also both stations' albedos fall throughout the day
T and G:Although Tsoil at Fla is 5 C colder than Bal and Atl inspection of last
several weeks indicates that this is not due to trampling
LEVELS and COMPASS:Levels: Fla x -0.5, y +2 degrees, Atl x - 0.4, y + 0.5 degrees
At 2030 AKST there was a Jolt at all three stations (downspike only in level
data)
MISCELLANEOUS: Camp lead open
- 303: RF_Communications, Site base, Sat 07-Mar-1998 11:10:15 AKST, Realigned base antenna
At 1045 AKST, 7 Mar I climbed to the top mast and realigned the base antenna.
Previously it pointed to the port.
It was realigned to point starboard/half aft
Afterwards a communications check was made: Fla ok, Atl ok, Bal ok
- 304: Rad_System, Site 4, Sat 07-Mar-1998 13:59:01 AKST, Inspection of Fla radarray
At 1300 - 1320 AKST, 7 Mar I visited Fla.
All fans running dispite frost on cowls and insides of cowls.
Three domes free of frost. The sw.in dome was clear on the sides but had
a cap of frost.
Defrosted sw.in using heat from hand and back of fleece glove.
Attempted to level radarray using horizon.
NOTE that rad array and Campbell are both Station 3 dispite Florida's
designation as station 4
Result of leveling: level x changed from -0.5 to +1.0
level y changed from +2.0 to +1.0
Result of defrosting cap of dome: R.sw.in decreased from 235 Wm-2 to 160 Wm-2
This is because when there is a frost cap, the low sun illuminates the cap
from the side and effectively increases the perceived down-welling flux of sw
radiation.
The implication is that ventilation that is not sucessful in completely
preventing/removing frost is possibly worse than no defrosting at all.
- 305: Daily_Status, Site base, Sun 08-Mar-1998 08:18:09 AKST, Daily_Status
Wx: Cold and clear,,
STATIONS:
VOLTAGES/CURRENTS: Loads:Atl ~ 0.6 amps, Bal and Fla both ~ 1.1 amps
Bat volts: Bal ~ 13.5, Atl ~ max, Fla ~ 14
BOX TEMPS: Fla ~ 10 C, Balt and Atl between 0 and 5 C
SONICS: Atl, Bal and Fla sample% = 100% costantly.
PRES: ok
T: For Atl and Fla, Tplat > Ttherm (0.2 C). For Bal, Tplat ~ Ttherm (0.05 C)
RH: ok
4-Component Rad. .Bal and Fla look ok
Albedo Fla > albedo Bal. Also both stations' albedos fall throughout the day
T and G:Although Tsoil at Fla is 5 C colder than Bal and Atl inspection of last
several weeks indicates that this is not due to trampling
LEVELS and COMPASS:Levels: Fla x -0.5, y +2 degrees, Atl x - 0.4, y + 0.5 degrees
At 2030 AKST there was a Jolt at all three stations (downspike only in level
data)
MISCELLANEOUS: Camp lead open
- 306: Rad_System, Site 4, Sun 08-Mar-1998 15:30:51 AKST, Frost cap test
Test of the effect of frost cap
An attempt to gain more information as to the effect of the frost
cap which the better ventilation sometimes leaves residual.
The sunshine conditions were not uniform today, Sun, 8 Mar,and there were
periods of cloudiness as well as a period of hazy sunshine.
1240 AKST lw.out and lw.in domes frost free.
Sw.out dome with very light sprinkle of frost particles
Sw.in dome has a cap of frost above 50 degrees,
Cleaned sw.in dome with EtOH below 45 degress
1315 AKST Cleaned sw.in to 60 degrees
sun just emerging from cloud, hazy sunshine
1415 AKST Cleaned awy the rest of the cap (also cleaned very light sprinkle
of frost particles on sw.out dome.
1500 AKST Hazier conditions
1515 AKST leveled rad array with bubble level
- 307: Daily_Status, Site base, Mon 09-Mar-1998 08:08:56 AKST, Daily_Status
Wx: cloudy with some sun in the afternno
STATIONS:
VOLTAGES/CURRENTS: Loads:Atl ~ 0.6 amps, Bal and Fla both ~ 1.1 amps
Bat volts: Bal ~ 13.5, Atl ~ max, Fla ~ 14
All in good condition
BOX TEMPS: Atl and Fla climbing towards 40 C. Bal only to 20 C
SONICS: Atl, Bal and Fla sample% = 100%
u and v ok
w ATI variance < Gill variances
PRES: ok
T: ok
RH: All similar
4-Component Rad. .Did a test on Florida of the effect of the frost cap
during cloudy conditions. Not as simpleas during direct sunshine
(see #306)
Florida Tdome/case/in/out much more isothermal than for Bal
T and G: ok
LEVELS and COMPASS:Levels: Fla releveled at 1515 AKST
level x from +1 -> -0.3
level y from +0.9 -> +0.05
Bal compass heading changed distinctly different to Fla and Atl
MISCELLANEOUS:
- 308: Visit_Log, Site 1, Mon 09-Mar-1998 14:22:08 AKST, Visit Atlanta to reinstall Rad Array
Between 130 - 1200 AKST, 9 Mar the radiometer array was reinstalled at Atlanta.
The radiometer housings had been milled with 2" x 2 1/2" rectangular holes and
Rotron fans afixed to the housings using juice container and duct tape.
The radiation shields with original width slots were used. Five inch long 2 1/2"square cowls were attached to the fan intakes (again fruit juice containers)
The platform was leveled to ~ 1 degree.
The four ventilator fans all ran, the TRH fan was running and the sonic
anemometer was frost free.
- 309: Daily_Status, Site base, Tue 10-Mar-1998 08:17:21 AKST, Daily_Status
Wx: Warm (-18C) band of cloud to the south.Sunny for ~5hr when sun high
STATIONS: Atlanta visit at 1130 - 1200 AKST
VOLTAGES/CURRENTS: Atl load increased 0.3 amps when new ventilator
started
All voltages in good condition
BOX TEMPS: All ststions fairly stable at ~ 30 - 40 C
SONICS: Atl, Bal and Fla sample% = 100% NB ATI will be changed to cue
heater from tc flags rather than from w flags
w ATI variance < w Gill variances
PRES: ok
T: ok
RH: All similar
4-Component Rad: Frost free day at Fla and Atl.
The Tdome/case/in/out for Atl and Fla more isothermal than for Bal.
This could be due to the good ventilation on Atl and Fla
T and G: ok
LEVELS and COMPASS:Levels: Atl installed and leveled at 1145 AKST
level x -1, level y +0.1
Bal levels are flaky
Big compass jolt at midnight at all staions
MISCELLANEOUS: Camp lead opened and then closed
- 310: Sonic, Site 4, Tue 10-Mar-1998 13:16:01 AKST, ATI heater activation by tc flag
At 1015 AKST downloaded a new configuration to Florida. The new configuration
utilizes sonic tc flag count rather than sonic w flag count as the critrium
for activating the ATI heaters.
- 311: Daily_Status, Site base, Wed 11-Mar-1998 07:53:31 AKST, Daily_Status
Wx: Warm (-12C) light snow
STATIONS:
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
All voltages in good condition
BOX TEMPS: All stations fairly stable at ~ 30 - 40 C
SONICS: Atl, Bal and Fla sample% = 100% until night time. NB snow
didn't block transducers
At ~1000 ATI changed to cue heater from tc flags rather than from w flags
w ATI variance < w Gill variances
PRES: ok
T: Spread of Tplat/therm appears too be larger than previously
RH: All similar
4-Component Rad: By inspection, Fla ventilator didn't keep off snow.
Fla and Atl with good ventilation have isothermal Tdome/case/in/out
Bal shows a spread
T and G: ok
LEVELS and COMPASS: ok, Baltimore has no compass
MISCELLANEOUS: Camp lead still active
- 312: Daily_Status, Site base, Sat 14-Mar-1998 08:20:48 AKST, Daily_Status 3/13/98
3/13/98 Daily_Status that was lost?
Wx: Cold mostly clear skies Winds 180 reversed WNW -29C
STATIONS:
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
All voltages in good condition Atl 14.5 Bal 13 Fla 13.5
Lots of heating at Atl, Bal shows a lot of heating what I call half
cyckes or steps. Shorter heating bursts?
BOX TEMPS: Continued trend towards cooler Atl 20 Bal 5 Fla 18
SONICS: Atl, Bal and Fla U/V show no obvious problems. even though heaters come
on
PRES: ok
T: Similar trends Bal still has a slight offset between T and Tp
RH: All similar
4-Component Rad: All three traces very consistent indiacting clearing ~1400
largest signal at BAL
T and G: ok
LEVELS and COMPASS: ok, Atl compass more variability and less correlation to
Fla and Atl
MISCELLANEOUS: Camp lead actice with a boat Bridge!
- 313: Daily_Status, Site base, Sat 14-Mar-1998 08:38:04 AKST, Daily_Status 3/12/98
Don't know whey 2 logs for 3/12 and 3/13 don't show up this morning. DEW
3/12/98 Daily_Status
Wx: Mostly cloudy -S overnaight
STATIONS:
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
All voltages in good condition Atl 14.5 Bal 13 Fla 13.5
Lots of heating at Atl, Bal shows a lot of heating what I call half
cyckes or steps. Shorter heating bursts?
BOX TEMPS: Cooler Atl 25 Bal 15 Fla 25
SONICS: Atl, Bal and Fla 18-2200 heaters on and various sonic problems
FLA W appears to have less variability than other 2 sites. Scales
of all 3 sites same? Splus plot of all 3 on one plot similar, although
not as obvious
PRES: ok
T: Similar trends Bal still has a slight offset between T and Tp
RH: All similar
4-Component Rad: Rads indicate early moring clearing which also matches drops
in T with clearing skies
T and G: ok
LEVELS and COMPASS: ok, Atl compass more variability and less correlation to
Fla and Atl
MISCELLANEOUS: Camp lead active again today End of snow after 3 days of -S
- 314: Visit_Log, Site 4, Sat 14-Mar-1998 12:27:55 AKST, Visit to Florida 3/12/98
Between 3/12/98 around 1850 UTC visited Florida:
Cleaned small upwind patches of frost off pyran up looking
Cleaned frost off v component of sonic
- 315: Visit_Log, Site 4, Sat 14-Mar-1998 12:30:30 AKST, Visit to Florida 3/13/98
Between 3/13/98 around 1940 UTC visited Florida:
Cleaned heavy frost out of T/RH intake
Very heavy frost. Fog and cleaning skies. Looked like it might stay clear, so I started to do Tony's radiometer cap test.
1940 cleaned 100% frost off pyrg up and dn
cleaned 66% (except cap) off pyran up and dn
skies mostly clear
2154 Sun behind clouds cleaned off remaining frost
- 316: Visit_Log, Site 4, Sat 14-Mar-1998 12:34:03 AKST, Visit to Florida
Started at 2200 UTC Florida routine checkup
Changed nozzle, looked fairly dirty
Load back to 1.1 amps
Snow removed, floor vent holes cleared
Flash card exchanged.
The new and improved radiometer fans were all running. Cleaned all domes
earlier in the day.
Lead under Florida remaining closed
Snow under radiometers all messed up
Have not replaced heat flux plate until we decide where to move Florida.
Generator and fuel cash goiung to dtermine where it goes
- 317: Daily_Status, Site base, Sun 15-Mar-1998 07:56:10 AKST, Daily_Status
Wx: -33 NW 11kts PC
STATIONS:
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
All voltages in good condition Atl 14.5 Bal 13 Fla 13.5
No heating cycles ATL, BAL Once cycle FLA just after visit?
BOX TEMPS: All 3 sites significantly colder today Atl 5 Bal -10 Fla 5
SONICS: All 3 sites look excellent. No dropouts
PRES: ok
T: Similar trends Atl has a slight offset between T and Tp of .25-.5C that I don't remeber being there before. BAL is the one that has had a similar look
RH: All simil in trends and magnitudes
4-Component Rad: This day is a very ibteresting day. At the ship it was cl
nearly the whole day. All 3 sites indicate in the IRR that it was a mostly clear
day, but the SW are all different. SInce we visited Florida early in the morning
I know the domes were all clear.
FLA shows 100% reflected SW
ATL shows IN greater than OUT
Bal shows OUT greater than IN
The shape of all 3 also indicate clear skies. This is a tough one to interpret
T and G: ok
LEVELS and COMPASS: ok,
MISCELLANEOUS: Camp lead active a little over night. The radiometer data for
this day need to be compared to other instruments at Met city (See comments
above)
- 318: Visit_Log, Site 4, Mon 16-Mar-1998 08:25:45 AKST, Visit to Florida
Started at 1830 UTC Florida routine instrument check
The new and improved ardiometer fans were all running. Dime size frost cap on
up looking pyran.
Sonics all very good
Cleaned off T/RH intake okay
- 319: Daily_Status, Site base, Mon 16-Mar-1998 08:28:04 AKST, Daily_Status
Wx: -25 NW 11 kts PC
STATIONS:
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
Atl 14.5 Bal 13 Fla 13.5
No heating cycles BAL Once cycle FLA and Atl
Bal .25 to .5 variability in TEGV
Fla A few larger swings in TEGV (1 VDC)
BOX TEMPS: All 3 sites significantly colder today Atl 5 Bal -10 Fla 5
SONICS: All 3 sites look excellent. No dropouts
W larger at Atl
PRES: Dropped 10 mb last 24 hrs
T: Similar trends Fla now has a slight offset between T and Tp
Not significant
RH: All similar in trends and magnitudes
4-Component Rad:
cleaned Fla at 1830 UTC
FLA 200 max SW -50 LW
ATL 250 max SW -50 LW
Bal 100 max SW -50 LW
The shape of all 3 is the same
T and G: ok
LEVELS and COMPASS: Atl different than Bal and Fla 1600-0900
MISCELLANEOUS: Camp lead active a little over night. The radiometer data for
this day need to be compared to other instruments at Met city (See comments
above)
- 320: Visit_Log, Site 4, Mon 16-Mar-1998 17:19:28 AKST, Visit to Florida
3/16/98
Started at 1830 UTC Florida routine instrument check
The new and improved ardiometer fans were all running
Heavy frost on both up radiometers and -S
Cleaned off
Slightly drifted to the north of the radiometer running
parallell to the radiometer boom.
Sonics Cleaned a little frost off W
T/RH intake okay
Major opening of camp lead this afternoon
From oncley@atd.ucar.edu Tue Mar 17 18:55:35 1998
Date: Tue, 17 Mar 1998 08:34:04 -0700 (MST)
From: Steve Oncley
To: wolfe@shebaship.apl.washington.edu
Subject: Re: Compass
> From wolfe@shebaship.apl.washington.edu Mon Mar 16 12:03:56 1998
> To: Tom Horst
> Subject: Compass
>
> We just recently installed a like compass on our met tower. Can you tell
> me what is done to the Pam station compass readings before I see them in
> qsee or Splus? From what I can tell your compass is pointing north, while
> ours is easterly. I roughly checked, and the sonic booms from our tower
> and Florida are nearly the same. I would then expect the compasses to be
> only 90 off. We read ~63 deg with no offsets. Fla is ~290.
>
> Dan
>
Our compasses should be reading 90 degrees to the west of the sonic boom.
I.e., if the sonic boom is pointing (magnetic) north, the compass should
read 270. Thus, Fla's boom should be pointing 290+90 = 020 degrees (magnetic)
Of course, this still is about 40 degrees off from your 063 reading - a
problem which I just noted independently with our data (by observing that
the relative station positions have changed by about 120 degrees during the
last 5 months, but our (true) boom "azimuth" only by 80 degrees). I'm
looking into this, but it could be helpful if someone there could take
manual compass bearings of our booms.
The compass readings in "qsee" are unadulterated. The wind directions shown
have been converted to true using the "declination" reported by the GPS plus
a "sonic.orientation" offset to add the difference between the compass heading
and the sonic boom heading. (Note that this is 60, rather than 90, degrees
for the Gill sonics, since their "0" is actually 30 degrees off from the boom
angle.)
I hopes this helps...Steve Oncley
- 321: Daily_Status, Site base, Tue 17-Mar-1998 08:22:21 AKST, Daily_Status
Wx: -29 NW 15 kts Westerly PC
STATIONS:
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
Atl 14.5 Bal 13 Fla 13.5
BAL One cycle
Bal .25 to .5 variability in TEGV stopped when Tbox >10C
BOX TEMPS: Atl Bal sites significantly warmer today Atl 25 Bal 10 Fla 10
SONICS: All 3 sites look excellent. No dropouts
W larger at Bal Off level?
PRES: Dropped 6 mb then roae 2 mb just after 180 wind shift
T: 8 deg drop in T with wind shift
RH: All similar in trends and magnitudes
4-Component Rad:
cleaned Fla at 1830 UTC
FLA 200 max SW -60 LW
ATL 200 max SW -60 LW
Bal 200 max SW -60 LW
All 3 sites correlate perfectly. Winds during night probabvly kept all
sites frost free. Excellent data
T and G: FLA 4 degrees colder than Atl and Bal -13 vs -9
LEVELS and COMPASS: Similar trends and magnitudes
MISCELLANEOUS: Camp lead not active 180 degree wind shifrt easterly
to westerly around 7 UTC Blowing snow covered up all digging at Fla
- 322: Rad_System, Site 3, Tue 17-Mar-1998 08:39:31 AKST, Changed level coefficients for Baltimore
3/17 19:39 gmt
Changed level coefficients using *4 mode of CR10 for Baltimore.
Installed coefficients for level sensor s/n 0383.
- 323: Daily_Status, Site base, Wed 18-Mar-1998 08:11:37 AKST, Daily_Status
Wx: -34 NW 15 kts Mostly clear
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
Atl 14.5 Bal 13 Fla 13.5
BAL Atl 2 heat cycles same time 1VDC Atl 1/2 VDC Bal
BOX TEMPS: Diurnal cycle Atl 22 Bal 12 Fla 13
SONICS: Atl and Bal problems starting 0900 UTC Winds shifted again
W smae Fla the best
PRES: 14 mb rise
T: 8 deg drop in T with wind shift
RH: All similar in trends and magnitudes RH down to 70%
4-Component Rad:
cleaned Fla at 1830 UTC
FLA 230 max SW -60 LW
ATL 275 max SW -60 LW
Bal 275 max SW -60 LW
This is a perfect example of Tony's earlier find Atl and Fla correlate
to a perfectly clear day, but the magnitudes are fif with Fla lower. IR
has a similar trend. Bal indicates there were clouds? Should have carrried
out Tony's experiment , but I get side tracked and cleaned domes. I think
it stills shows the effect
Tcase shows a spread at Bal which is the only rads without new fans
T and G: Tg hat Atl has a differenttrend than the other 2
LEVELS and COMPASS: Similar trends and magnitudes 2 spikes in Atl data
corresponding to heater cycles
MISCELLANEOUS: Camp lead opened big time
- 324: Visit_Log, Site 3, Wed 18-Mar-1998 13:19:02 AKST, Baltimore site visit
3/18 ~20:00 UTC (11:00 AKST)
Visited Baltimore. Changed propane and flashcard.
Changed TEG nozzle. Voltages were still good,
Nozzle left out there in bottom of TEG box by accident
Cleans holes out in bottom of TEG, only one completely
blocked (hear TEG and side vent
4-comp level sensor back on boom, not checked against a bubble
level
No frost on sonic heads
Removed light frost from TRH intake Intake is loose. Take allen
set on next visit.
Pyg domes were clean.
PSP domes moderate to heavily frosted. Used alcohol and rag to
clean domes
Fans running, but not blowing much
No frost on sonics to clean
Did not bother cleaning frost from inside of psp ventilation housings
because 4-port fan only has corregated tubes to pygs. One tube doubled over
blocks the other two ports. (Atlanta is the same way. The
small ventilation proved not to keep the psp domes clear of frost anyway, so
all available ventilation was put toward the pygs in November, when
the sun was not up anyway. The ventilation tubes are not quite long enough
so that if all 4 are attached to the housing nipples, they're subject to
falling off. This is partly due to the fiberglass wrap around the corrugated
tubes getting in the way.)
Called Jeff to see that Flashcard was being written to after changing i
Level also working and voltages/load okay
.
The route to Baltimore was fairly smooth. S and blowing snow since
last visit has smoothed things out. No signs of open water or recent
leads
- 325: Daily_Status, Site base, Thu 19-Mar-1998 08:15:55 AKST, Daily_Status
Wx: -26C -62C WC 25-30ts BS
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
Atl 14.5 Bal 13 Fla 13.5
BAL appears to be struggling with lower T box
BOX TEMPS: Atl -5 Bal -10 Fla -5 All 3 down
SONICS: Minimal heating cycles
PRES: 5 mb drop 1018mb
T: warmed from -32 to -24 due to winds mixing
RH: All similar in trends and magnitudes RH up to ~80%
4-Component Rad:
cleaned Fla at 1830 UTC
FLA 250 max SW -60 LW
ATL 200 max SW -60 LW
Bal 240 max SW -60 LW
Balt cleaned during visit, didn't make it to FLA due to lead
movement. Strange downward spiking of reflected SW Tdome also shows
downward spiking
Ci As Sc as a several LOWS in line move nearby
T and G: Tg at Atl has a different trend than the other 2 Atl down
FLA and Bal down then up Atl W/m**2 range, Bal 8-13 W/m**2 Fla 0-6 w/m**2
LEVELS and COMPASS: Atl noiser
MISCELLANEOUS: Camp lead opened big time
- 326: Daily_Status, Site base, Fri 20-Mar-1998 08:25:31 AKST, Daily_Status
Wx: -19C -42C WC 15-20 kts
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
Atl 14.5 Bal 13 Fla 14
BAL a lot of variability
BOX TEMPS: Atl 10 Bal 5 Fla 20 All 3 up
SONICS:No heating cycles everything looks good u,v,w
PRES:7 mb rise 1012 mb
T: continued warming with ovc and winds
Tp higher by 1/2 C at both Atl and Fla
Bal very slight offset
Warmer temps
RH: All similar in trends and magnitudes RH up to 84%
4-Component Rad:
FLA clean as per visiual inspection
FLA 180 max SW 10 LW
ATL 180 max SW 10 LW
Bal 225 max SW 10 LW
Strange downward spiking of reflected SWout Tdome also shows
downward spiking
T and G: Ok
LEVELS and COMPASS: Atl noiser with slightly different trend
MISCELLANEOUS: Camp lead quiet.
- 327: Daily_Status, Site base, Sat 21-Mar-1998 08:25:16 AKST, Daily_Status
Wx: -18C -52C WC 30-35 kts SE
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla .6
Atl 14.5 Bal 13 Fla 14.6
BAL a lot of variability still
BOX TEMPS: Atl 5 Bal 2 Fla 17 All 3 dn slightly
SONICS:No heating cycles Definate difference after the change of Atl
and Fla Shifts in W and UV
PRES:6 mb drop 1012 mb
T: continued warming with ovc and winds
Tp higher by 1/3 to 1/2 C at both Atl and Fla
Bal slight offsets
RH: All similar in trends Fla less fluctuations RH 84%
4-Component Rad:
FLA clean as per visiual inspection
ATl 250 max SW 0 LW
BAL 210 max SW 0 LW
FLA 250 max SW 0 LW
Strange downward spiking of reflected SWout Tdome also shows
downward spiking
FLA radiometers drop out about the time sonic reattached
T and G: Drop out same time radiometers do
LEVELS and COMPASS: Fla levels dropped out similar to other instruments
above Compasses okay
MISCELLANEOUS: Camp lead quiet.
- 328: Visit_Log, Site 1, Sat 21-Mar-1998 08:39:14 AKST, Atlanta site visit
3/20 ~20:00 UTC Visited Atlanta.
Changed propane and flashcard.
Changed TEG nozzle. Nozzle face was quite dirty.
No frost on sonic heads
Shoveled out snow, clean intake air holes
Replaced Gill sonic with Fla ATI
Cleaned radiometer of frozen mist on upwind side
- 329: Visit_Log, Site 4, Sat 21-Mar-1998 10:51:50 AKST, Visit to Florida
3/20 and 21 98
3/20
Jeff removed ATI sonic ~1900 UTC to take out to Atl
EVE turned off
Gill sonic from Atl put back on ~2230 UTC
It is about this time the all the campell instruments disappeared
3/21
Very strong winds 30-40 kts
Found Campbell fused blown. Second fuse alos blew.
Disconnected radiometer fans and tried one more fuse. Campbell backup
We assume that the radiometer fans may have got iced up and when they tried to
start up, Took out the fuse. We were called back to the ship as visibility is so
bad and there are signs of the ice moving.
No ice on the radiometer domes.
Reported a new lead opening up near the main camp
- 330: Daily_Status, Site base, Sun 22-Mar-1998 10:37:09 AKST, Daily_Status
Wx: -15C 15-20 kts SW shift at 1200 UTC
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla .6
Atl 14.5 Bal 13 Fla 14.6
BAL a lot of variability still
Radiometer fans off at Fla
BOX TEMPS: Atl 27 Bal 7 Fla 25 All 3 up
SONICS:No heating cycles Definate difference after the change of Atl
and Fla Shifts in W and Still differences in U/V at Fla compared to
other 2 sites even with wind shift
PRES: dropped to 1002 mb 0900 UTC uo to 1005 mb
T: No offsets any sites
RH: All similar in trends Fla less fluctuations RH 84%
Fla reached 100% at time of wind shift
4-Component Rad:
FLA clean as per visiual inspection
ATl 190 max SW -60 LW
BAL 190 max SW -60 LW
FLA 190 max SW -60 LW
Strange downward spiking of reflected SWout Tdome also shows
downward spiking
All 3 sites show clearing skies
T and G: Tsoil and Gsoil major jumps Atl 1400 Atl
Same time Tsoil at Fla starts to drop.
LEVELS and COMPASS: Similar trens some coorelation to wind shift
MISCELLANEOUS: All kinds of leads through main camp!! Lead 1-2' wide directly
under Fla radiometer!! (Pictures) Alt may have an encroaching
pressure ridge
- 331: Visit_Log, Site 4, Sun 22-Mar-1998 10:46:30 AKST, Visit to Florida
3/22
~1800 UTC
Visited site because leads opening up nearby.
Lead 1-2' wide directly under radiometers. Jeff cleaned very small spot
of frost off up Pyran
Met tower, Fla and 2 Ocean City huts on separate ice compared to rest
of camp
Radiometer fans not stuck, but let off until a better time to check
Power to main camp off
- 332: Daily_Status, Site base, Mon 23-Mar-1998 08:07:02 AKST, Daily_Status
Wx: -17C 25-30 kts SE shift at 1000 UTC
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla .6
Atl 14.5 Bal 13 Fla 14.6
BAL a lot of variability still
Radiometer fans off at Fla
BOX TEMPS: Atl 25 Bal 22 Fla 27 Diurnal trends
SONICS:No heating cycles Definate difference after the change of Atl
and Fla Shifts in W and
PRES: rose to to 1012 mb then dropping beginning at 1000 UTC 1009 mb
T: No offsets any sites
RH: All similar in trends RH 84%
4-Component Rad:
ATl 290 max SW -60 LW
BAL 300 max SW -60 LW
FLA 300 max SW -60 LW
Strange downward spiking of reflected SWout Tdome also shows
downward spiking
All 3 sites show mostly clear ubtil 1000 cloudy and BS 1000 UTC
T and G: Tsoil and Gsoil mat Atl seem to have recovered
No Fla Gsoil on screen
LEVELS and COMPASS: Similar trendFla and Bal
Alt some coorelation to wind shift at 1000
MISCELLANEOUS: Camp quite over night. Lead now 4` under Fla radiometers. Can
see lead affect in SW reflected
John going out to Atl today and can survey situation
- 333: Daily_Status, Site base, Mon 23-Mar-1998 08:17:02 AKST, Daily_Status
Wx: -17C 25-30 kts SE shift at 1000 UTC
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla .6
Atl 14.5 Bal 13 Fla 14.6
BAL a lot of variability still
Radiometer fans off at Fla
BOX TEMPS: Atl 25 Bal 22 Fla 27 Diurnal trends
SONICS:No heating cycles Definate difference after the change of Atl
and Fla Shifts in W and
PRES: rose to to 1012 mb then dropping beginning at 1000 UTC 1009 mb
T: No offsets any sites
RH: All similar in trends RH 84%
4-Component Rad:
ATl 290 max SW -60 LW
BAL 300 max SW -60 LW
FLA 300 max SW -60 LW
Strange downward spiking of reflected SWout Tdome also shows
downward spiking
All 3 sites show mostly clear until 1000 cloudy and BS 1000 UTC
T and G: Tsoil and Gsoil mat Atl seem to have recovered
No Fla Gsoil on screen
LEVELS and COMPASS: Similar trendFla and Bal
Alt some coorelation to wind shift at 1000
MISCELLANEOUS: Camp quite over night. Lead now 4` under Fla radiometers. Can
see lead affect in SW and LW reflected. Excellent case study.
John going out to Atl today and can survey situation
- 334: Visit_Log, Site 4, Mon 23-Mar-1998 16:10:41 AKST, Visit to Florida
3/23 2230 UTC
Visited site because leads opening up nearby.
Lead now 3-4' wide and frozen over.
Rad sensors frost free.
Checked side of lead and found broken flux plate wire.
- 335: Daily_Status, Site base, Tue 24-Mar-1998 08:44:51 AKST, Daily_Status
W Sunny skies above BS beautiful picture -17 C -60 C 40 kts winds
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla .6
Atl 14.5 Bal 13 Fla 14.6
BAL less variability
Radiometer fans off at Fla still
BOX TEMPS: Atl 5 Bal 10 Fla 13 all down
Something not write in conversion to u/v
PRES: dropped to 1006 mb then rose to 1008 mb
T: No offsets any sites
RH: All similar in trends RH 80%
4-Component Rad:
ATl 290 max SW -70 LW
BAL 290 max SW -70 LW
FLA 290 max SW -70 LW
Less spiking at BAL
All 3 sites show mostly clear skies beginning at 2200
T and G: Fla Tsoil sharp rise at 1200 UTC like sensor is now in salt water
No Fla Gsoil, found broken wire sticking out of lead yesterday
LEVELS and COMPASS: Similar trend Fla and Bal
Alt slight change still indicating active region
MISCELLANEOUS: Camp quite over night. Lead now 4` under Fla radiometers. Can
see lead affect in SW reflected. Excellent case study.
- 336: Visit_Log, Site 4, Tue 24-Mar-1998 21:22:04 AKST, Visit to Florida
3/24 2230 UTC
Visited site lead closed No ridging
Rad pyran incooming cleaned of frost
Checked side of lead again and found tsoil sensor Stuck back in snow.
- 337: Daily_Status, Site base, Wed 25-Mar-1998 07:27:56 AKST, Daily_Status
W -27 C 25 kts E winds
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla .6
Atl 14.5 Bal 13 Fla 14.6
BAL more variability again
Radiometer fans off at Fla still
BOX TEMPS: Atl 8 Bal 10 Fla 10 all down
SONICS Look fine no heating cycles
PRES: Rising all day to 1016mb
T: Atl and FLa slight offsets again
RH: All similar in trends RH 74%
4-Component Rad:
ATl >300 max SW -70 LW
BAL >300 max SW -70 LW
FLA >300 max SW -70 LW
Spiking at BAL
All 3 sites show mostly clear skies There was frost on Fla yesterday
T and G: Fla Tsoil put into snow after lead closed
No Fla Gsoil, found broken wire sticking out of lead yesterday
Atl Tsoil simila to Fla may be in water
LEVELS and COMPASS: All simila in compass
Alt slight change still indicating active region
MISCELLANEOUS: Camp quite over night. Lead now closed
- 338: Daily_Status, Site base, Thu 26-Mar-1998 09:10:18 AKST, Daily_Status
W -29 C 5 kts E winds
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
Atl 14.5 Bal 13.3 Fla 14
BAL more variability again
Radiometer fans back on at FLA
BOX TEMPS: Atl 18 Bal 22 Fla 21 all up
SONICS Look fine no heating cycles
PRES: Slight rise all day to 1017mb
T: Bal Tp and RH dropped out at ~0300-0400
This happens to match the time a bear was spotted in the area
RH: All similar in trends RH 73% Bal out Bear?
4-Component Rad:
ATl >300 max SW -70 LW
BAL >300 max SW -70 LW Rpile in is gone same time as T/RH (BEAR?)
FLA 295 max SW -70 LW
Spiking at BAL
All 3 sites show mostly clear skies There was frost on Fla yesterday
cleaned off ~2000 UTC Can see that in the data
T and G: Fla Tsoil put into snow after lead closed
No Fla Gsoil,
Atl Tsoil still around -2C
John's visit yesterday showed no indication of
lead or ridge activity Slush along the bottom of TEG maybe?
LEVELS and COMPASS: All similar Slight glitch at Bal in compass and Level
same time as other sensors disappear (BEAR?)
MISCELLANEOUS: Camp quite over night. Bear aft of ship ~3-4 UTC last night
John's visit to Atl. Took digital camera pictures.
- 339: Daily_Status, Site base, Fri 27-Mar-1998 09:19:49 AKST, Daily_Status
3/27/98
-18 C 5 kts NE winds -S over night
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
Atl 14.5 Bal 13.3 Fla 14
BAL more variability again
Radiometer fans back on at FLA
BOX TEMPS: Atl 30 Bal 30 Fla 30 all up
SONICS Look fine no heating cycles Bal a little less than perfect
today
PRES: Down from 1016 to 1006
T: Bal Tp and RH still gone
RH: All similar in trends RH 73%
4-Component Rad:
ATl >300 max SW -70 LW
BAL All sensors now no reporting
Turns out there is a bug in qsee. Both SW
and other Rpile are both working when viewed with iplo
Bal >300 max SW 0
FLA 300 max SW 0 LW
Spiking at BAL
All 3 sites show clear skies until ~00UTC
cleaned off Fla ~1550 UTC 3/27/98
T and G: Fla Tsoil put into snow after lead closed
No Fla Gsoil,
Atl Tsoil still around -2C
LEVELS and COMPASS: All similar
MISCELLANEOUS: Lead activity over night, but not old Fla lead
- 340: Daily_Status, Site base, Sat 28-Mar-1998 08:10:40 AKST, Daily_Status
3/28/98
-15 C 5 kts Nw winds -S over night
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
Atl 14.5 Bal 13.3 Fla 14
BAL more variability again
BOX TEMPS: Atl 34 Bal 32 Fla 31 all up
SONICS Look fine no heating cycles Bal a little less than perfect
today
PRES: Down from 1012 to 1002
T: Bal Tp and RH still gone
RH: All similar in trends RH 88%
4-Component Rad:
ATl 170 max SW 0 LW
BAL qsee problem again
FLA 170 max SW 0 LW
Spiking at BAL
All 3 sites show clear skies until ~00UTC
T and G: Fla Tsoil put into snow after lead closed
No Fla Gsoil,
Atl Tsoil still around -2C
LEVELS and COMPASS: VBal shows a 3 deg shift at ~0000 UTC
MISCELLANEOUS: Major camp lead activity pressure ridging Garage dumped
- 341: Visit_Log, Site 4, Sat 28-Mar-1998 18:17:04 AKST, Visit to Florida
Started at 1830 UTC Florida routine instrument check
The new and improved ardiometer fans were all running. Dime size frost cap on
up looking pyran.
Sonics all very good
Cleaned off T/RH intake okay
- 342: Daily_Status, Site base, Sun 29-Mar-1998 08:48:45 AKST, Daily_Status
3/29/98
-20 C 10-15 kts NE winds -S over night OVC
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
Atl 14.5 Bal 13.3 Fla 14
BAL more variability again and continually dropping
BOX TEMPS: Atl 10 Bal 15 Fla 14 all dn
SONICS Look fine no heating cycles Fla W larger variatrions than normal
PRES: Dropping then leveling out from 1003-998
T: Bal Tp and RH still gone
RH: All similar in trends RH 80%
4-Component Rad:
ATl 175 max SW -30 LW
BAL qsee problem still Also problem viewing in Splus until I went back
to before rad went out
FLA 175 max SW -30 LW
Spiking at BAL
All 3 sites show gradually thinning cloud layer and a very even
overcast yesterday creating a smooth SW cycle
T and G: Fla Tsoil put into snow after lead closed
No Fla Gsoil,
Atl Tsoil still around -2C
LEVELS and COMPASS: VBal shows a 3 deg shift at ~0000 UTC
MISCELLANEOUS: Major camp lead activity pressure ridging Garage dumped
- 343: Daily_Status, Site base, Mon 30-Mar-1998 08:11:00 AKST, Daily_Status
3/30/9
-20 C 10-15 kts SE winds -S over night OVC
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal ~1.1, Fla 1.1
Atl 14.5 Bal 12.5 Fla 14
BAL more variability again and continually dropping
BOX TEMPS: Atl 25 Bal 30 Fla 30 all up
SONICS Look fine no heating cycles Both Gills show very small variations
on teh % plots <1%
PRES: Dropping 995 mb
T: Bal Tp and RH still gone
RH: All similar in trends RH 83%
4-Component Rad:
ATl 175 max SW -30 LW
BAL qsee problem still Also problem viewing in Splus until I went back
to before rad went out
FLA 175 max SW -30 LW
Spiking at BAL
All 3 sites show thinning cloud layer some PC periods in the late
afternoon
T and G: Fla Tsoil put into snow after lead closed
No Fla Gsoil,
Atl Tsoil still around -2C
LEVELS and COMPASS: All 3 sites almost mirror images
MISCELLANEOUS: No lead activity
- 344: Visit_Log, Site 3, Mon 30-Mar-1998 19:19:30 AKST, Baltimore site visit
3/31 ~01:00 UTC (04:00 AKST)
Visited Baltimore. Changed propane and flashcard.
Changed TEG nozzle. Voltages were still good,
Nozzle fairly dirty
Cleaned holes out in bottom of TEG, This drained water out
No frost on sonic heads
Repaired bear damage New T/RH
Brought in radiometers for John
No frost on sonics to clean
Data being written to flash card
.
The route to Baltimore was bad in the early part. Crossed many leads
Had to find different route even from Jay's this morning
- 345: Daily_Status, Site base, Tue 31-Mar-1998 08:07:23 AKST, Daily_Status
3/31/98
-27 C 10-15 kts SE winds -S over night PC
VOLTAGES/CURRENTS: Atl ~ 0.8, Bal .6, Fla 1.1
Atl <10 Bal 12.5 Fla 14
BAL back up Atl appears to run out of propane
BOX TEMPS: Atl -0 Bal 12 Fla 25 all up
SONICS Lots of heating cycles just after we visited Bal
One cycle early this morning at Fla
PRES: rising 1001
T: Bal T/RH back
RH: All similar in trends RH 76%
4-Component Rad:
Atl >300 max SW -30 LW
BAL brought in for fan change
FLA >300 max SW -30 LW
Spiking at BAL
All 3 sites show PC conditions all day
T and G: No Fla Gsoil,
Atl Tsoil still around -2C
LEVELS and COMPASS: No level at Bal
Bal compass has a 6 deg drop just after switched units during visit
MISCELLANEOUS: No lead activity
- 346: Visit_Log, Site 1, Tue 31-Mar-1998 15:21:36 AKST, Atlanta site visit
3/31 ~22:00gmt
Visited Atlanta. Changed propane, nozzle and flashcard.
Removed frost from upfacing PSP. Other domes clear.
No frost on sonic or TRH.
TEG had stopped running. Still don't know why. Both tank valves
open, but one tank still weighed 50#.
TEG started right up after changing nozzle and tanks.
Leveled 4-component with bubble level.
Sled skis are frozen solid into overflow water turned to ice.
New crack and small ridge 4' west of radiometers. Overflow must have
come up through here and flooded the T and G sensors, as well as flooding
the sled's skis.
3" of fresh water ice in downhill side of sled box, under TEG. Must be
from melted snow that drifted in through the louvers, still open 1/8" Could
not get drain/vent holes unblocked of ice. Will wait for TEG heat to thaw the
ice, and will unblock holes on next visit. Meanwhile, louvers and
disconnected 3" PVC will provide ventilation. Other 2 drain/vent holes in
bottom of sled box are clear.
Crossed half a dozen new cracks/ridges between the ship and Atlanta.
New cracks/leads are no longer freezing thickly.
- 347: Daily_Status, Site all, Wed 01-Apr-1998 21:14:17 AKST, Daily_Status
From 3/31/98 16Z through 4/1/98 16Z
-20 C 15-20 kts SE winds -S cloudy
VOLTAGES/CURRENTS: Atl 13.5, Bal 13.5, Fla 14.1
Atl ~ 0.75 Bal 0.9 Fla 1.2
BOX TEMPS: Atl 4 Bal 12 Fla 20 all up, Atl came up 23 UTC
SONICS Heating cycles every 1.25 h
One heating cycle at Atlanta as Jeff restarted it at 23 UTC
Winds increasing
u,v components at Atl greatly different than other two
u,v components at Fla slightly different than at Bal
-floe rotations?
Atl w~0.05, Bal w~-0.4, Fla w~+0.6 Concerns of Bal&Fla not being level??
PRES: falling 999.7
T: Atl -19.5, Bal -19.5, Fla -19.7
RH: Atl 81%, Bal 78%, Fla 82%
Fla and Atl trends similar, but Fla values slightly higher
Bal trend slightly different than the other two, and lower values
4-Component Rad:
Atl >300 max SW -80 LWnet
BAL brought in for fan change
FLA >300 max SW -80 LWnet(scales will be increased tomorrow)
Both sites show mostly clear conditions all day
Fla radiometers cleaned at 1700 UTC-dime-size rime on SW down
T and G: No Fla Gsoil,
Atl Tsoil still around -2C
Atl Gsoil at -3.6 W/m2 while +10 W/m2 at Bal
LEVELS and COMPASS: No level at Bal
Spike in compass at Atl shortly after restart
Bal compass has a 2 deg drop
Fla compass increased 1 deg over 8h
MISCELLANEOUS: New lead opened to W and NW of ship towards runway. Should
not seriously affect today's flights.
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- 348: Logistics, Site 4, Wed 01-Apr-1998 21:26:24 AKST, Florida moved
Florida was moved to 40 m NW of met hut and about 280 deg from met tower. It is about 35 m west of the tower radiometers. The orientation of the sonic is at
360 deg true and the T/RH is at 86 deg true. The sled is nearly due south
from the tripod, and the radiometer arm is to the southwest. Cleveland will be
placed between Florida and the tower radiometers for comparisons. A more
precise map will be made tomorrow, as other instruments (sodar, PRT,
General Eastern) have been or need to be moved due to contamination from
the new large generator.
The Gill sonic head was rotated so N arrow is now due north by removing two of
the three set screws, since the N arrow was originally about 10-15 deg off
(CCW viewed from the top) from the sonic arm.
- 349: Sonic, Site 4, Wed 01-Apr-1998 21:40:08 AKST, New Orientation of Gill at Florida
This is a repeat of the Gill orientation comment from the 'Florida Moved'
logbook entry:
The Gill sonic head was rotated so N arrow is now due north by removing two of
the three set screws, since the N arrow was originally about 10-15 deg off
(CCW viewed from the top) from the sonic arm.
- 350: Daily_Status, Site all, Thu 02-Apr-1998 18:10:56 AKST, Daily_Status
From 4/1/98 16Z through 4/2/98 16Z
-23 C 2 kts SE winds overcast crud
STATIONS: Atl: Up
Balt: Up, no 4-comp.
Clev: Not setup
Fla: Moved, Down between ~19:15 - 00:45(4/2) UTC
No Gsoil, Tsoil hanging in mid-air after move.
Intention is to move it again after radiometer
intercomparison with Clev. for PYR dome removal.
VOLTAGES/CURRENTS: Atl 13.5, Bal 13.3, Fla 13.0
Atl ~ 0.8 Bal 0.6 Fla 1.1
BOX TEMPS: Atl 5-30 deg.
Bal 12-30 deg.
Fla 12-32 deg.
SONICS Baltimore heating cycles every 1.25 h, Reprogrammed trh timing
to heaton=5, heatoff=3600 at 03:35 4/3 UTC.
One heating cycle at Florida when box put back on air at new location
~00:50 4/3 UTC.
u,v components at Fla different than other two
Gill alignment on boom adjusted by ~ 13-deg CW from top to have 'N'
in line with mounting arm.
W: Atl 0.05, Bal ~-0.4, Fla wide variation from ~0-.6 beginning 13:00
4/2 UTC
PRES: rising from ~998.5 - 1004
T: ~-16 to -24 all similar
RH: Atl 80-86%, Bal 75-90%, Fla 80-90%
Trends similar, Bal slightly more variation
4-Component Rad:
Atl ~250 max SWin -50 LWnet
BAL brought in for fan change
FLA ~160 max SWin -50 LWnet
Both sites show mostly ovcast conditions all day
T and G: No Fla Gsoil,
Tsoil: Atl still around -2C, Bal. -10
Gsoil: Atl at -3 W/m2, Bal falling 10-6 W/m2
LEVELS and COMPASS: No level at Bal
Spike in compass at Atl shortly after restart
Bal compass has a 2 deg drop
Fla compass increased 1 deg over 8h
MISCELLANEOUS: New lead opened to W and NW of ship towards runway.
Did not affect flights on 4/1 and 4/2.
We. 4/1 Cleveland sled shoveled and hauled out of slush before
freezing in. Placed adjacent new Florida site W. of met hut.
Th. 4/2 entire day spent digging/pulling out met storage hut
and contents from slush before freezing in from water overflow
after nearby lead event last week. Spare boxes and misc eqpt
packed on ship and seatainer.
Baltimore 4-comp radiometer plenums diassembled and given to ship's
engineer/machinist to modify for new ventillator assy.
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- 351: Visit_Log, Site 4, Fri 03-Apr-1998 21:15:34 AKST, Fla Visit, new 4-comp. ventillation sys. rimed
Florida Visit: 4-comp. vent. failure observations :-(
WEATHER: Overcast, Lt. E. winds, nearby lead probably
raising rh to perhaps 90%, warm, good riming conditions.
Visited 4/3 ~9:30-12:00 AKST (18:30-21:00 UTC)
Moderate rime ice on all structures (of the light hoare frost variety).
TRH: Intake completely covered.
Imperceptible exhaust ventillation.
Easy to blow off rime on the cover but tube had more solid ice
that had accumulated a bit on the side-walls and on the
gortex cover. Gortex itself and Therm. looked OK.
Used fingers to remove small amount of ice around cap and
cleaned intake at about 10 AKST.
Ventillation improved.
Gill: Data from last night observed glitching on W and some heater
cycling per the flags.
Observed tiny bit of light rime on upper U-transducer (30-deg
W. of the north arrow).
Very easy to remove w/duster or blow off.
Rime all around structure but otherwise transducers were OK.
Heaters working.
4-Component Juice-can duct Ventillator System:
All domes at least 50% covered:
50% for up/dn-LW, 100% for up/dn-SW
Not the light rime, harder but thin clear type ice.
All Ventillators working well. Good aspiration coming out of
domes, however as best I could tell the SW ventillation seemed
distributed more evenly around the ring whereas the LW seemed
more concentrated closer to the fan and opposite the
direction of the wind where the ice buildup was. Note this
might be an erroneous observation since the wind may have
easily washed the plume away before I could detect it in the
vicinity of the ring area.
Plenums interior clear for both down looking LW and SW.
Cleaned domes with Alcohol ~10:50 AKST.
Note very small ice crystals began to form across the SW dome
within 1/2 hour.
Comparison with ETL system:
ETL 4-comp. within 20 yds.
ETL LW both totally clear, SW had 40% ice toward wind. This
ice was both light rime and some clear stuff.
Differences in systems
ETL ventillation barely perceptible, NCAR very noticable,
perhaps 4-5 times stronger.
ETL shield outter ring has gap of ~3/16", NCAR outter ring
is sealed.
(My opinion) ETL system seemed distinctly warmer to
touch on shield (Ola wasn't as confident about that).
Clearly the ETL system is sinking more energy into heating of
the air around the radiometers.
Comment about SPOWS met tower.
Even though their system is also 110VAC lotsa power, their
observation from last fall was that simple ventillation alone
was inadequate and their system works pretty well with both
heating/ventillating. Will investigate further as time permits.
Conclusions/Questions:
Will proceed with setup of Clev. 4-comp. with 4 ventillators
for testing of the SW dome/no-dome vs. Florida and/or ETL.
For these conditions at least, the simple 4 individual fan
system does not work.
Since I will be modifying the Baltimore system soon
(tonight/tomorrow) in preparation for returning it to site,
the question becomes whether or not to proceed simply as
planned or consider adding some of the left-over heating
resistors since the simple ventillator won't protect for all
circumstances. That'd be a guess, but with a wind generator
and PV maybe more power can be diverted.
- 352: Daily_Status, Site all, Fri 03-Apr-1998 21:54:39 AKST, Daily_Status
From 4/2/98 16Z through 4/3/98 16Z
WEATHER: -22 to -14C, ~light winds
Appeared Sunny most of 4/2. Cloud cover moved in later on in
afternoon.
STATIONS: Atl: Up
Balt: Up, no 4-comp.
Clev: Not setup
Fla: New location
No Gsoil, Tsoil hanging in mid-air after move.
Intention is to move it again after radiometer
intercomparison with Clev. for PYR dome removal.
VOLTAGES: Atl 14.5, Bal 13.5, Fla 12.6 dropping some
CURRENTS: Iload: Atl ~ 0.8, Bal 0.6, Fla varied .8-1.2
Icharg: Atl 1.1 and dropping, Bal 1.0, Fl varied 1.2-1.4
BOX TEMPS: Atl 15-35 deg.
Bal 20-35 deg.
Fla 30-35 deg.
SONICS: Atl: Flags OK, no heating cycles
Reduced variation in w compared to others
Balt: Reprogrammed trh timing to heaton=5, heatoff=3600 at
03:35 4/3 UTC, one heat cycle / flag at about 11Z
Fla: many heating cycles / flags beginning ~13:00Z, see Visit_Log.
Noticeable spiking in w beginning at about same time.
PRES: Consistent, all rising from ~1004 to ~1010
T: Consistent, all rising from ~-22 to -14
RH: Consistent, Atl 80-90%, Bal 80-90%, Fla 80-94%
4-Component Rad:
BAL Down, brought in for fan change
Atl, Fla Consistent, ~300 max SWin, ~25 max SWout, ~-50 LWnet
T and G: No Fla Gsoil,
Tsoil: Atl still around -2C, Bal. -9.5, Fla. exposed to air.
Gsoil: Atl bad (possible ridge seen from bridge),
Bal falling 6-5 W/m2,
Fla not installed.
LEVELS and COMPASS: No level at Bal
Bal compass has a 2 deg drop
Fla compass noisy (~3-deg) during riming.
MISCELLANEOUS:
Fr. 4/3 Cleveland sled running in later afternoon. Setup
4-component on 3-legged rad stand parallel to Fla. system.
Both facing roughly SE. Clev. system not yet aspirated;
no level, tsoil, HFT, sonic, trh.
Added passive air vent. w/weather-head to top of sled but
not the heat motor yet.
Baltimore 4-comp radiometer plenums finished ready for reassembly.
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- 353: sled-2, Site 2, Fri 03-Apr-1998 21:57:01 AKST, Cleveland system brought up
Cleveland sled and data system brought up.
Located side-by-side with Florida.
Initially will have only the CR10 with the 4-component system for
testing against Florida for SW domes versus no-domes.
Radiometers installed on 3-legged stand oriented roughly SE.
Sled sitting adjacent to Florida sled roughly SSW of the towers.
NO tsoil, hft, sonic, trh.
Passive weather-head vent. cut into lid of box to help prevent overheating.
Cover on louvered vent is installed.
- 354: Rad_System, Site 3, Sat 04-Apr-1998 20:26:31 AKST, Visit / Rad. System riming at Clev./Fla.
Visit / Rad Systems at Clev. and Florida
Morning of 4/4/98, both systems had rime on both sets of domes although
the SW had considerably more (dime size on LW, 50% of dome on SW).
Cleveland was operating without any ventillators and it did have more rime
than the 'juice-can' aspirated Florida 4-comp but only slightly more.
Note the Cleveland system had the new 4-comp ventillator installed but
not turned on. There could be an effect of natural ventillation through
the straight-in fan ducts.
By afternoon the LW domes on both Cleveland and Florida had cleared off
(sunny day, warm with the wind at ~10-20knots) and most of the rime on
all structures had gone as well. The SW were still rimed though with
perhaps 30% more coverage on the unaspirated system.
19:00 AKST 4/4 (4:00 4/5 UTC)
Domes cleaned.
- 355: Rad_System, Site 3, Sat 04-Apr-1998 20:59:53 AKST, Cleveland SW domes removed, ventillator turned on
Sa. 4/4, ~19:15 AKST, or 4/5, 4:15 UTC
Both SW domes were removed from the Kipp and Zonnens to begin the
dome vs no-dome intercomparison test with Florida.
The new 4-component individual fan technique similar to the 'juice-can'
system was powered up.
- 356: sled-2, Site 2, Sat 04-Apr-1998 21:03:44 AKST, Cleveland sled venting changed.
Sa. 4/4, ~16:00 AKST or 4/5, 1:00 UTC
Added heat motor to open/close a cover plate on the lid vent at Cleveland.
The louvers are covered. Last night without the heat motor, the box still
got fairly warm ~+25. The temps at Sheba have been on the warm side.
Will watch to see whether the motor works and whether the box temps stabilize
more.
Su. 4/5, ~9:30 AKDT
Observed heat motor shutter fully opened.
Louvered vent still closed
Noticing that box still getting warm, will add 2nd cable/air access
hole in side of box later.
- 357: sled-4, Site 4, Sat 04-Apr-1998 21:09:04 AKST, Florida sled venting changed
Sa. 4/4 19:30 AKST or 4/5 4:30 UTC
Added passive weather-head lid vent to Florida sled.
Louvered vent still uncovered.
Su. 4/5 10:30 AKDT
Added heat motor shutter to open/close lid vent.
- 358: Daily_Status, Site all, Sat 04-Apr-1998 22:53:20 AKST, Daily_Status
From 4/3/98 16Z through 4/4/98 16Z
WEATHER: -22 to -14C, ~winds increasing on 4/4 to ~"7m/s
Cloudy throughout 4/3, sunny 4/4
Good riming condition 4/3, cleared off 4/4
STATIONS: Atl: Up
Balt: Up, no 4-comp.
Clev: New location next to Fl.
No Tsoil, Gsoil, level, sonic, trh
Fla: New location
No Gsoil, Tsoil hanging in mid-air after move.
Intention is to move it again after radiometer
intercomparison with Clev. for PYR dome removal.
VOLTAGES: Atl 14.5, Bal 13.5, Fla 13.2
CURRENTS: Iload: Atl 0.8, Cle .4, Bal 0.6, Fla varied 1
Icharg: Atl 1.2, Cle .8, Bal 1.0, Fl varied 1.3
BOX TEMPS: Atl 15-35 deg.
Cle 10-30 deg.
Bal 25-35 deg.
Fla 30-35 deg.
SONICS: Atl: Flags OK, no heating cycles
Much quieter, and reduced variation in w compared to
others.
Balt: some riming indicated, heating cycle 4/4 ~14:00AKST
looks cleaned
Fla: many more heating cycles / flags beginning 3/3 ~13:00Z,
through 4/4 7:00 Z.
PRES: Consistent, all dropping from ~1011 to ~1008
T: Consistent, all droping from ~-14 to -19
RH: Consistent, dropping from ~88 to 86%, slightly more variation
at Balt.
4-Component Rad:
BAL Down, brought in for fan change
Atl, Fla Consistent, ~200 max SWin, ~180 max SWout
T and G: No Fla Gsoil,
Tsoil: Atl still around -2C, Bal. -8.5, Fla. exposed to air.
Gsoil: Atl may be OK, cycled around -2.5
Bal falling ~5.5 to 3.5 W/m2,
Fla not installed.
LEVELS and COMPASS: No level at Bal
COMPASS Atl and Bal show similar variation of 1.5 deg cycle
Fla compass more noisy with some spikes.
MISCELLANEOUS:
Fr. 4/3 Cleveland sled running in later afternoon. Setup
4-component on 3-legged rad stand parallel to Fla. system.
Both facing roughly SE. Clev. system not yet aspirated;
no level, tsoil, HFT, sonic, trh.
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- 359: Rad_System, Site 4, Sun 05-Apr-1998 13:04:29 AKDT, Fla./Clev. Rad System Observations
4/5/98 ~9:00-11:30 AKDT Visit Florida / Cleveland
CONDITIONS:
~-18, similar winds as yesterday 6-10 knots from NE, overcast
over night, beginning to clear in later morning also slightly
drier than yesterday at low ~80's RH.
RADIOMETER Systems:
Florida double dome: SW covered lightly w/hardish ice crystals all
around the dome. This was slightly worse (but debatably) than...
Cleveland single dome: SW also covered lightly w/hardish ice crystals
all around the dome.
ETL system: SW had much less icing, perhaps 40% of the dome to windward.
All LW domes were clear.
The white radiation shields and the PVC cases on the NCAR system also
had light ice but the ETL shields were clean so the excess heating
appears to help.
Reviewing differences: ETL systems are insulated with aluminized bubble
wrap, reduced ventillation rate, more heat, and shield ring's outter
edge has ~3/16" opening for air flow.
Conclusions: From what I've seen during recent conditions, the
'new' 4-component ventillation system is of little value. Possibly the
only benefit is if it helps clean the domes more quickly as conditions
permit.
Old Ideas re-discussed w/Ola:
Add some insulation to the NCAR plenums
Try heating elements inside plenums again, only for the SW
Try hydro-phobic solution (anti-fog stuff used for glasses on SW domes).
OTHER: Gill transducers and TRH were clear but there was a little rime on
all of the structures.
- 360: Daily_Status, Site all, Sun 05-Apr-1998 14:12:52 AKDT, Daily_Status
From 4/4/98 14Z through 4/5/98 14Z
WEATHER: -19 to -14C, ~winds from NE ~"5-8m/s
Sunny throughout 4/4, overcast overnight
Some riming conditions through 4/5, but not nearly
as much as on 4/3,4 (LW domes did clear off afternoon
of 4/4 but SW still getting it a bit)
STATIONS: Atl: Up
Balt: Up, no 4-comp.
Clev: New location next to Fl.
No Tsoil, Gsoil, sonic, trh, SW domes off
Fla: New location
No Gsoil, Tsoil hanging in mid-air after move.
Intention is to move it again after radiometer
intercomparison with Clev. for PYR dome removal.
VOLTAGES: Atl 14.3, Cle 13.5 rising, Bal 13.6, Fla 13.2 rising
CURRENTS: Iload: Atl .8, Cle .6, Bal .6, Fla varied 1.0
(cycling at Atl, probably heater)
Icharg: Atl 1.1, Cle 1.4, Bal 1.0, Fla 1.3
BOX TEMPS: Atl 15-35 deg.
Cle 10-30 deg.
Bal 25-35 deg.
Fla 30-35 deg.
SONICS: Atl: Flags OK, maybe 1 or heating cycles at Fla.
Wdir: consistent.
Wspd: Atl. has seemed noticably less than Fla/Bal by about 1-2 m/s
Also reduced W magnitudes (more level?).
Note this station has more snow, almost up to the horiz. tripod
rails so the reduced magnitude is probably a surface friction
effect.
PRES: Consistent, all dropping from ~1007 to ~1001
T: Consistent, min/max ~-19 to -14, Balt. T.therm/plat has less
difference that Fla./Atl.
RH: Consistent, Atl 84-87, Bal.83-87, Fla. 85-89
4-Component Rad:
Consistent waveforms, but see notes about Fla/Clev
BAL Down, brought in for fan change
Atl, has significantly lower SWin so what, it is either iced
up more or iced up less?
LW Consistent but Clev. still has a DC bias of perhaps +25W/m**2.
T and G: No Fla Gsoil,
Tsoil: Atl still around -2C, Bal. -8.5, Fla. exposed to air.
Clev not installed.
Gsoil: Atl slowly dropping around -2.5
Bal slowly rising around 3.7 W/m**2,
Clev/Fla not installed.
LEVELS: No level at Bal., Added Clev.
Atl x~ -1.3 y good; Clev. x~.2, y~.8; Fla. good
COMPASS: Atl and Bal show similar noisy variation of 1.5 deg cycle perhaps
wind effect, Fla compass much less noisy.
MISCELLANEOUS:
Looks like new small lead heading toward Runway from older lead
between ship and RW.
Almost thought i could see Baltimore w/binoculars, silly me.
- 361: Daily_Status, Site all, Mon 06-Apr-1998 18:09:39 AKDT, Daily_Status
From 4/5/98 14Z through 4/6/98 16Z
WEATHER: -19 to -14C, ~winds from NE ~"5-8m/s
Sunny through most of 4/5, and into 4/6.
1-2 cm of fresh snow overnight. Warm temperatures, no wind.
BASE: Pampoll had to be rebooted. Someone cycled the UPS yesterday,
battery discharged, etc. Ppoll, etc. rebooted
just fine. Had to rerun qcplots by hand...
STATIONS: Atl: Up
Balt: Up, no 4-comp.
Clev: New location next to Fl.
No Tsoil, Gsoil, sonic, trh, SW domes off
Fla: New location
No Gsoil, Tsoil hanging in mid-air after move.
Intention is to move it again after radiometer
intercomparison with Clev. for PYR dome removal.
VOLTAGES: Atl 14.36 Cle 13.8 rising, Bal 13.6, Fla 13.4 rising
CURRENTS: Iload: Atl .8, Cle .6, Bal .6, Fla varied 1.0
(cycling at Atl, probably heater)
Icharg: Atl 1.1, Cle 1.4, Bal 1.0, Fla 1.3
BOX TEMPS: Atl 15-35 deg.
Cle 20-35 deg.
Bal 25-35 deg.
Fla 10-28 deg.
SONICS: Atl: Flags OK
Wdir: all sites had wind shift to W, values consistent.
Wspd: Wind speeds very similar, with major features showing up at all 3 sites. W magnitudes similar (0-0.4 m/s) but different sites have
different signs.
PRES: Consistent, all rising from ~1001 to ~1008
T: Consistent, temperatures rose from ~-19 to -15. Balt. T therm/plat has
much less difference than at Atl & Fla.
RH: Nighttime drying at all 3 sites, but moister at Fla.
4-Component Rad:
Consistent waveforms, but see notes about Fla/Clev
BAL Down, brought in for fan change
More SW in/out at Cle than the others
No frost this morning (4/6), but snow partially covered LW,SW in
Cleared at 1800 UTC
LW Consistent but Clev. still has a DC bias of perhaps +25W/m**2.
Cle Tcase/dome slightly higher than Fla
T and G: No Fla Gsoil,
Tsoil: Atl still around -2C, Bal. -7.9 and rising, Fla. exposed to air.
Clev not installed.
Gsoil: Atl constant around -2.7
Bal constant around 3.7 W/m**2,
Clev/Fla not installed.
LEVELS: No level at Bal. All levels within 1 deg of 0 deg.
Atl x~ -1.3 y=0.2; Clev. x~.2, y~.8; Fla. x~0.2 y~0.1
COMPASS: Atl and Bal show similar noisy variation of 1.0- 1.5 deg, Balt
changes slightly greater
Fla compass much less noisy and of different character
MISCELLANEOUS:
- 362: Sonic, Site 2, Mon 06-Apr-1998 20:21:11 AKDT, ATI #3 installed at Clev.
Installed ATI #3 on Cleveland for check against Fla.
Tower sited immediately to W of Fla tower. Both sonics pointing N.
ATI boom: 333 + 23 variation
TRH boom: 66 + 23 variation
Notes:
- ATI is approximately .5-m lower than Gill. Have not measured vertical
distance to snow surface (of today)
- TRH boom sent up was a full length unit, need to cut-off and reinstall
later.
- Clev/Fla sleds to S of towers.
- 363: sled-2, Site 2, Mon 06-Apr-1998 20:32:08 AKDT, Wind Generator installed on Cleveland
Wind Generator installed to check / mounting.
Could use maybe 2-3' taller mast and braces.
Braces should probably have small pad.
Tolerances on hole for generator head too tight, hard
to put onto mast.
Otherwise mount OK.
Note I didn't see the blinking LED indicating the generator
is producing voltage. Could be related to single phase rewiring
(unlikely) or charger sensing that battery is fully charged (more
likely).
Now wait for wind (would've been nice a couple of days ago).
Log 4/8
14:50 checked generator: turning at ~ 25 RPM in ~14knot winds,
No voltage output measured on open circuit....wonderful :-(
Further examination reqd. and check of other unit purchased.
- 364: Visit_Log, Site 1, Mon 06-Apr-1998 21:48:40 AKDT, Florida dome cleaning
4/5 ~19:00gmt
Cleaned frost off Florida's upward facing pyranometer.
Unplugged drain hole beneath TEG to let out 3" of accumulated water.
4/6 ~18:30gmt
Cleaned frost off Florida's upward facing pyranometer.
Unplugged drain hole beneath TEG to let out 2" of accumulated water.
- 365: Visit_Log, Site 1, Tue 07-Apr-1998 18:25:32 AKDT, Atlanta Site Visit
Atlanta Visit, 4/6/98 into 4/7
Sensor Status: All reporting
22:46 Z cleaned half-dollar sized rime off upward looking SW.
00:00 Z radiometers leveled using bubble level
00:15 Z feathery rime removed from sonic V component
Exposure:
Tsoil probe is about 2-3 feet horizontally from a crack in the ice.
TEG box is about 30 feet from crack and there is about 4cm of slush
under the box before solid ice. Snow and water accumulated inside
box blown in through louvered vent. Jeff has been slowly draining,
unable to chip out ice enough in drain today.
Snow level up to tripod horizontal rails
Photos taken but forgot to take exact vertical measurement from
sonic. Estimated to be 7.5 feet
4-comp level is at about 5'8" to center of beam.
Logistics:
PI's considering whether it is more valuable to retain the temporal
continuity of this site and the examination of a slush component vs
moving the station for logistical concerns. The snow surrounding
the box is about 2-3' deep and could present some difficulty when
it is time to move.
There are 4 small cracks (4-12") that have apparently expanded a bit
since yesterday between Atlanta and the ship.
Other: Amos and Andy mobile (Jim Maslanik and Bob Stone) radiometer system
and snow/ice survey (Don Perovich) were also making measurements
around the vicinity of Atlanta.
- 366: sled-1, Site 1, Tue 07-Apr-1998 18:51:22 AKDT, Atlanta Solar Panels installed, Sled venting changed.
During site visit on 4/6:
~00:15 2 Solar Panels installed.
One on each side of box. The box appears to be oriented roughly E-W
so one will get minimal sun. The other is facing relatively deep
snow (2-3') in front of it but it should still get some decent exposure.
Verified PV/cables.
Only mounting arrangement of the panels and cabling will require that
they are removed during transport because of clearance with outrigger
brackets. :-( Fortunately very easy to do.
Observed power monitoring system still providing reasonable values.
(saw 'Vteg' w/ PC showing 16.7 during sunny period: good sign it's
seeing the PV. Stay tuned.
Sled Venting:
2" Cable access added to rear of box and about 1' from the floor.
1 Solar Panel covering the louvered vent.
Added 2" passive weather-head vent with heat motor to lid over
TEG cooling fins. Unable to fully tighten the PVC parts on this one.
- 367: Daily_Status, Site all, Tue 07-Apr-1998 19:06:01 AKDT, Daily_Status
From 4/6/98 14Z through 4/7/98 14Z
WEATHER: -24 to -16C, Sunny, winds<2.5 all day 4/6.
Some high cirrus(?) / partly overcast through night and
some also during 4/6
BASE: OK
STATIONS: Atl: Up
Balt: Up, no 4-comp.
Clev: Up, New location next to Fl.
trh added ~23Z 4/6, sonic added ~19Z 4/6
No Tsoil, Gsoil, SW domes off
Fla: Up, New location
No Gsoil, Tsoil hanging in mid-air after move.
VOLT/CUR: Atl 14.4, .7/1.1 cycling iload: no doubt trh heater needs reprog
Cle 13.8 rising, was .8/1.4 but after adding wind gen. it shows
up .2/.5 Checked it w/meter and PC, looked OK but
monitor circuit messed up, however vbatt still looks
believable.
Bal 13.4, .6/1.0
Fla 13.4, 1.0/1.4
BOX TEMPS: Atl 30-35 deg.
Cle 15-30 deg. Lots of variation, someone must've opened box!
With wind gen. added, new 2" cable access port cut in.
Appears to reduce box temp combined w/heat motor vent
Bal 33-37 deg.
Fla 25-32 deg.
SONICS: Atl: Flags OK. Note brief heating cycles on Atl. and Clev. too.
Need to reprog trh's
Wdir: consistent except Clev....need to re-shoot boom and set
orientation.dat
Wspd: Consistent.
W: Atl, Cle w/ATI's clearly lower variation in magnitudes
PRES: Consistent, rizing, ~1007-1020
T: Consistent, min/max ~-24 to -16,
Clev. Fla. consistent & very close
RH: Consistent, ~80-90%,
Fla. shows 6% higher than adjacent Clev., someone's off.
4-Component Rad:
Consistent waveforms
Atl, has significantly lower SWin so what, it is either iced
up more or iced up less?
Cle The lack of outter SW dome clearly shows the ~5-8% higher signal
than at the adjacent Fla. Otherwise very consistent values.
Note that Ola cleaned both sets of domes early yesterday.
LW were OK, but incoming still showing the mentioned bias: some-
times consistent, other times ~25W/m**2 high
BAL Down, brought in for fan change
Fla. See note above w/Cle.
T/Gsoil: Atl Still in slush around -1.9C, G at ~-2.5w/m**2
Cle Not installed.
Bal. -7.65 rising from -7.8; G at about 3.3 w/m**2
Fla No Gsoil, Tsoil dangling in and exposed to air (waiting to
dig in after station move).
LEVELS: Atl x is off ~ -1.3
Cel y is off ~ .9
Bal Not installed
Fla Good.
COMPASS: Atl and Bal show similar fluctuations of about 4-deg
Fla. and Cle much more stable.
MISCELLANEOUS:
- 368: Daily_Status, Site all, Wed 08-Apr-1998 09:42:12 AKDT, Daily_Status
From 4/7/98 14Z through 4/8/98 14Z
WEATHER: -24 to -16C, Reasonably sunny but also partial overcast during 4/7
- 4/8, more overcast through morning 4/8
winds 2-5.5m/s
BASE: OK
STATIONS: Atl: Up
Balt: Up, no 4-comp.
Clev: Up, New location next to Fl.
No Tsoil, Gsoil, SW domes off
Fla: Up, New location
No Gsoil, Tsoil hanging in mid-air after move.
VOLT/CUR: Atl 14.4, .7/1.2 Cycling iload, check trh heater cycle, same
as others = 5 heaton, 3600 heatoff.
Easy to see PV voltage and some charging impressed
on Vteg. One panel has pretty good align to sun.
Cle 13.8 holding, .2/.5 currents after adding wind gen.
Need to recheck w/meter and PC, looked OK but
monitor circuit messed up, Vbatt still OK
Bal 13.4, .6/1.0 odd v/load/charge cycle ~20-21Z on 4/6 but no
sonic heating evident, maybe trh fan?
Fla 13.4, slowly rising 1.0/1.4
BOX TEMPS: All dropping through period
Atl 5-30 deg., opened 2 vent holes on 4/6. did not completely
cover louvers, but they are protected by PV panel.
Cle 5-20 deg. Lots of variation, someone must've opened box!
With wind gen. added, new 2" cable access port cut in.
Appears to reduce box temp combined w/heat motor vent
Bal 15-35 deg.
Fla 12-25 deg.
SONICS: All flags OK.
Atl: Flags OK and data looks OK but there was a small bit of rime on
the V during site visit.
Wdir: consistent except Clev....off. Reprog. orientation.dat
Boom at 356, trh at 269 so set to 87. Note plot
appears 90-deg off so setting to 87 vs 60?...
Wspd: Consistent.
W: Atl, Cle w/ATI's clearly lower variation in magnitudes, seems
a bit suspicious.
PRES: Consistent, rizing, ~1021-1019 dropping
T: Consistent, min/max ~-22 to -14,
Clev. Fla. consistent & very close
RH: Consistent waveforms, ~82-90%,
Fla. shows ~3-5% higher than adjacent Clev., someone's off.
4-Component Rad:
Consistent waveforms
Atl, Higher SWin but cleaned later during site visit at about 0Z,4/8.
Cle The lack of outter SW dome shows the ~5-8% higher signal
than at the adjacent Fla. Otherwise consistent values.
Note that Ola cleaned domes again yesterday, 4/7.
LW were OK, but incoming still showing the mentioned bias: some-
times consistent, other times ~25W/m**2 high
BAL Down, brought in for fan change
Fla. See note above w/Cle.
T/Gsoil: Atl Still in slush around -1.85C, G at ~-2.4w/m**2
Cle Not installed.
Bal. -7.6 rising to -7.4; G varying around about 3.5 w/m**2
Fla No Gsoil, Tsoil dangling in and exposed to air (waiting to
dig in after station move).
LEVELS: Atl x is off ~ -1.3, Releveled during site visit ~0Z,4/8, but
note that the x still only improved in reading to ~-1. Ola
leveled, JM didn't double check independently.
Cel y is off ~ .9
Bal Not installed
Fla Good.
COMPASS: Bal shows a couple of quick shifts of ~2 deg, Atl ~1.5...lead work?
Fla. and Cle similar but varying roughly 1.5-deg over period.
Appears some small cracks working a bit, sailing along.
MISCELLANEOUS:
- 369: Rad_System, Site 4, Wed 08-Apr-1998 21:48:35 AKDT, Florida Radiometer work
4/8 14:00 AKDT Removed Fla 4-comp. and replace with modified 4-comp from Bal.
Reporting reasonable considering wrong calib.
15:00 AKDT Removed Bal 4-comp. and packed it ready to go out.
21:15 AKDT Installed Fla 4-comp after adding a heater.
Cannot run heating elements until bigger fuse put into EVE...
tomorrow.
NOTE: Discovered a fair amount of snow inside the 4-comp plenums esp. from the
upwind components.
- 370: Rad_System, Site 2, Wed 08-Apr-1998 22:31:57 AKDT, Releveled Clev. 4-comp.
Checked level and made slight correction per bubble level.
- 371: Rad_System, Site 4, Thu 09-Apr-1998 12:48:28 AKDT, Added heater to SWin at Fla.
4/9, ~11:15 AKDT
Installed 2A fuse in EVE.
Turned on Minco heater installed under outter dome cap
on the uplooking SW K&Z.
Ventillator going full speed.
The LWout, downlooking Pyg's ventillation fan seems to be
complaining about the cold.
- 372: Daily_Status, Site all, Thu 09-Apr-1998 17:53:35 AKDT, Daily_Status
BEGINNING for
From 4/8/98 14Z through 4/9/98 14Z
WEATHER: -24 to -16C, 4/8 overcast, snowing,
healthy winds between 6-7m/s dropping overnight,
low visibility/contrast on 4/8.
BASE: Pampoll down at ~7Z 4/9. No response over net
login screen took user but never returned for pswd
Cycled power to get back up, booted OK.
STATIONS: Atl: Up
Balt: Up, no 4-comp.
Ran out of fuel on 4/9. Jay/Dean scouted route
to Balt.: difficult, 4 leads, ridges, etc.
Weather permitting will try to go out w/fuel tomorrow.
Clev: Up, New location next to Fl.
No Tsoil, Gsoil, SW domes off
Fla: Up, 4-comp off for awhile
No Gsoil, Tsoil hanging in mid-air after move.
VOLT/CUR: Atl 14.4, .7/1.2 Cycling max-iload, check trh heater cycle, same
with Clev. both have ATI's which may be factor.
Can see PV voltage and some charging impressed
on Vteg. One panel has pretty good align to sun.
Cle 13.8, .7/1.2 removed wind gen. which wasn't producing
Added 1-PV, some voltage rise/
monitor circuit messed up, Vbatt still OK
Bal 13.6, .6/1.0
Fla 13.6, 1.1/1.6, removed 4-comp in middle of day.
BOX TEMPS: All dropping through period
Atl 10-30 deg., opened 2 vent holes on 4/6. did not completely
cover louvers, but they are protected by PV panel.
Cle 0-23 deg. Opened box off and on
Bal 15-40 deg.
Fla 10-30 deg. Opened box off and on
Added 2" new cable access vent, have not covered
louver
SONICS: All flags OK.
Bal: shows maybe 1 short heat cycle at about 0Z 4/9
Wdir: consistent except Clev....off. Reprog. orientation.dat
Boom at 356, trh at 269 so set to 87. Note plot
appears 90-deg off so setting to 87 vs 60?...
Wspd: Consistent.
W: Atl, Cle w/ATI's clearly lower variation in magnitudes, very
suspicious will wait to deploy ATI to Balt.
PRES: Consistent, rizing, ~1017.5-1020.5
T: Consistent, min/max ~-20 to -12,
Clev. Fla. consistent & very close
RH: Consistent waveforms, ~84-90%,
Fla. shows ~3-5% higher than adjacent Clev., someone's off.
4-Component Rad:
Consistent waveforms
Fla/Clev. Both SW rimed but not as bad. Less difference between
them and ETL domes morning of 4/8. Cleaned around 9:30 AKDT
Atl,
Cle The lack of outter SW dome shows the ~5-8% higher signal
than at the adjacent Fla. Otherwise consistent values.
Note that Ola cleaned domes again yesterday, 4/8 at about 9:30
AKDT.
LW were OK, but incoming still showing bias: some-
times consistent, other times ~25W/m**2 high
BAL Down, brought in for fan change
Fla. System removed from tower ~15:00 - 21:00 AKDT 4/8
T/Gsoil: Atl Still in slush around -1.85C, G at ~-2.2w/m**2 but possibly
broken
Cle Not installed.
Bal. ~ -7.4 rising to -7.2; G varying around about 3.5 w/m**2
Fla No Gsoil, Tsoil dangling in and exposed to air (waiting to
dig in after station move).
LEVELS: Atl x is off ~ -1.3, Releveled during site visit ~0Z,4/8, but
note that the x still only improved in reading to ~-1.
Cel y is off ~ .9, releveled and came within .45
Bal Not installed
Fla Good.
COMPASS: Bal shows a couple of quick shifts of ~2 deg, Atl ~1.5...lead work?
Fla. and Cle consistent but varying roughly 1-deg over period.
MISCELLANEOUS:
Spent most of Th.4/9 afternoon helping to cleanup old camp.
9 people worked 2+ hours just trying to get 20 fuel drums out
of the snow (completely covered) and ice (bottom half frozen in).
Four barrels were recovered, one with a small leak, before one
of the picks opened a hole to the water and the pit filled in,
ending the job. Seems like this sink-hole is roughly at the same
depth as the met hut 100 yds away. Met hut OK for now.
- 373: Rad_System, Site 2, Fri 10-Apr-1998 13:14:36 AKDT, Soil sensors installed at Clev.
Cleveland Logger #4:
4/10 ~14:30 Installed HFT, and Tsoil sensor at snow/ice interface.
This is roughly 1.5' under the snow level.
4/10 18:45 AKDT, Programmed CR10 Coefficients
HFT = 943149 40.1 Wm**2/mV
Tsoil = NCAR002 a0 =-236.8619
a1 = 223.6343
a2 = 14.91284
NOTE: Good opportunity to intercompare with Fla.
Both at roughly same depth and ice condition and are within
~20 feet of each other.
NOTE: Hopefully we will move Cleveland to near a lead tomorrow or
shortly thereafter.
NOTE: Quick check of the site showing that the Tsoil is not
working and needs to be rechecked.
- 374: Rad_System, Site 4, Fri 10-Apr-1998 18:49:29 AKDT, Soil sensors installed at Fla.
Florida: Logger #3
4/10 ~14:30 Installed HFT, and Tsoil sensor at snow/ice interface.
This is roughly 1.5' under the snow level.
4/10 18:45 AKDT, Programmed CR10 Coefficients
HFT = 943148 43.8 Wm**2/mV
Tsoil = N001 a0 =-239.1288
a1 = 227.3445
a2 = 11.91465
NOTE: Good opportunity to intercompare with Clev.
Both at roughly same depth and ice condition and are within
~20 feet of each other.
NOTE: Hopefully we will move Florida to a better (but still nearby)
location within a week.
- 375: Rad_System, Site 2, Fri 10-Apr-1998 19:34:57 AKDT, Cleveland Radiometer work: Outter Domes re-installed
4/10 ~15:00 AKDT Removed Clev. 4-comp.
Reinstalled outter domes
Left in met-hut while refreshing shot desiccant that's
used for between the domes.
~18:15 AKDT Reinstalled Clev 4-comp.
NOTE: Once again, found snow inside the 4-comp plenums esp. from the
upwind components.
- 376: Rad_System, Site 4, Fri 10-Apr-1998 20:04:19 AKDT, Added heater to SWout at Fla.
4/10, 9:30 AKDT
Turned on Minco heater installed on case of
the downlooking SW K&Z.
- 377: sled-2, Site 2, Fri 10-Apr-1998 20:06:02 AKDT, Wind Generator moved from Cleveland to Florida
4/10 ~9:00 AKDT
Wind Generator was running at high speed in am. Winds at ~6-7m/s
VOC ~= 20
Installed brake: this works
All seemed OK.
4/10 ~11:00 AKDT
Moved wind generator to Florida to help cover load from
4-comp heaters.
Plugged generator into charge controller.
Iload, Icharge immediately went out to lunch, probably dropped
in half. Maybe ground problem.
Vteg/Vbatt reflecting reasonable values: 17.5, 14.5
NOTE: After putting onto charge controller later observed unusual
sounds or pulsing from gen. Probably feedback from the
pulse width charging from the morningstar.
Probably need to connect gen directly to the battery.
- 378: Daily_Status, Site all, Fri 10-Apr-1998 22:33:01 AKDT, Daily_Status
From 4/9/98 14Z through 4/10/98 14Z
WEATHER: -16 to -10C,
Winds increasing from south at ~2-4 m/s then to east up to ~6m/s
over period.
BASE: OK
STATIONS: Atl: Up
Has 2 PV's
Balt: Died at ~ 22z 4/9
Ran out of fuel on 4/9 two hours before going down.
When fuel went, vbatt immediately dropped to 12.5, held
a bit then trailed off......BAD battery.
Weather permitting will try to go out w/fuel,batt,ATI,
4-comp,PV, Sunday. Difficult trip, don't know how many
passages will be possible before I leave. Almost certainly
not 3. Hopefully twice.
Tomorrow is aircraft day for logistics crew.
Clev: Up, New location next to Fl.
No Tsoil, Gsoil, SW domes off
Has 2 PV's
Fla: Up, 4-comp off for awhile
No Gsoil, Tsoil hanging in mid-air after move.
Has 1 PV
VOLT/CUR: Atl 14.5, .7/1.1 Cycling max-iload, check trh heater cycle, same
with Clev. both have ATI's which may be factor.
Can see PV voltage and some charging impressed
on Vteg. One panel has pretty good align to sun.
Cle 13.8, .75/1.1 removed wind gen. which wasn't producing
Added 1-PV, some voltage rise/
monitor circuit messed up, Vbatt still OK
Bal 0.0
Fla 13.0, dropping with 4-comp heater, 1.5/1.8
BOX TEMPS: Atl 15-30 deg.
Cle 5-25 deg. Opened box off and on
Bal dropping fast!
Fla 15-33 deg. Opened box off and on
SONICS: All flags OK. Fla heating cycles on ~ 7:30 and 11:00 AKDT 4/9
Bal:
Wdir: consistent except Clev.... still 90-deg off.
Checked via EVE: looks consistent w/ observed.
Wspd: Consistent.
W: Atl, Cle w/ATI's clearly lower variation in magnitudes, very
suspicious will wait to deploy ATI to Balt.
PRES: Consistent, rizing, ~1020 rising to 1024.5 dropping to 1021.5
T: Consistent, min/max ~-16 to -10,
RH: Consistent waveforms, ~84-90%,
Fla. shows ~4% higher than adjacent Clev.
4-Component Rad:
Consistent waveforms
Fla/Clev. All domes clear in AM. Plenty of wind.
Atl,
Cle No outter SW domes
Otherwise consistent values.
LW were OK, but incoming still showing bias: some-
times consistent, other times ~25W/m**2 high
BAL Down, brought in for fan change
Fla. OK
T/Gsoil: Atl Still in slush around -1.9C, G at ~-1.5w/m**2 slowly
rising from ~-2.2
Cle Not installed.
Bal. ~ -7.3 rising, G dropping form 3.5 - 2.9 w/m**2 before
station down.
Fla No Gsoil, Tsoil dangling in and exposed to air (waiting to
dig in after station move).
LEVELS: Atl x is off ~ -1.0, y OK
Cel x ~.2, y is off ~ .4
Bal Not installed
Fla x ~.4, y ~.1
COMPASS: Bal shows a shifts of ~1.5 deg
Fla. spiking occassionally. Both Clev./Fla. tend to show a slow
1.5 deg rotation.
MISCELLANEOUS:
Power work on met hut. Dean/Jay tying in new generator.
Switched over to small generator during work.
- 379: TRH, Site 1, Sat 11-Apr-1998 07:35:30 AKDT, Atlanta TRH heaton set=1, heatoff=1800
4/11 7:35 AKDT
Reset TRH heating cycle to on=1, off=1800
Reason is to determine if that will clean up plot of iload_max
which is showing the quick heater cycle as a pulse.
Mostly that is a nusaince on the plot.
- 380: Rad_System, Site 2, Sat 11-Apr-1998 13:07:32 AKDT, Clev. Tsoil running
4/11 9:30 AKDT
Tsoil sensor connector at Cleveland had come loose
after installation. Reinstalled. Working.
NOTE: Fla = -8.5
Cle = -6.5
These are very close together, approximately 15-20, both
were at the ice/snow interface.
Both had roughly 1.5' of snow over them.
Coefficients in loggers verified.
Gsoil for Clev. showing ~2w/m**2 higher (~1 vs 3) positive flux
so perhaps the ice is thinner and there it actually is warmer.
Otherwise these numbers seem suspiciously different.
- 381: Sonic, Site all, Sat 11-Apr-1998 14:23:02 AKDT, Sonic Serial Numbers and condensed comments
From: Steve Oncley, (some edits/additions from John M.)
Subject: sonic serial numbers
Enclosed is a summary I've just made of logbook comments pertaining to moving
the sonics. According to my reading, the current status is:
Atlanta: ATI 0202
Cleveland: ATI 0303
Baltimore: Gill 123 (Kurt thinks that this has the "weird" mount)
Florida: Gill 87
Spares: Gill 104 (original spare);
Gill 67 (old Cleveland, no heaters);
Gill 112 heater installed (last used on Florida)
Notes on Rotated Mounts (North arrow with respect to boom):
s/n 87 13 deg CCW viewed from top measured on site by compass.
s/n 112 34.2 deg CCW viewed from top measured by machinist on ship
s/n 67 47.3 deg CW viewed from top measured by machinist on ship
s/n-87
I note that comments 33 and 349 should pertain to the same sensor (87), and
indicate that the 13 degree problem developed during handling, rather than
being a problem during set-up. Furthermore, this Gill should have had a
"good" mount, with the screws installed, so slippage would not be expected.
[JWM note, this mount was not 'good' and as noted it did not slip. In
order to install all 3 screws, the mis-machined mount required the sonic
head to be rotated. When realigned 2 screws were removed to get it right]
s/n-112
On Oct 16th this sonic alignment was corrected for N outward from boom.
Noting that on Jan 15th it was removed from Atlanta, the heater installed and
put on Florida. On feb 26th is was removed and replaced at Florida with an ATI.
It is unclear when the mount was rotated by 34.2 degrees.
s/n-67
Was installed at Cleveland on Oct 14th. The next entry refers to retrieval
after the crunch of Clev. on Feb 13. It is unclear, but possible that
the mount was incorrect at setup. Possibly notes buried in Daily_Status
may shed light on these questions.
-----------------------------------------------------------------------
Logbook Date Site Sonic Comment
Comment s/n
26 oct 11 all Gill: aligned with 'u' north to parallel the
north on the TRH compass so that they are
reporting similarly even though the xarms are
90-deg off.
31 oct 12 1 112 Carl Friehe's R2 sonisc s/n 112? installed
33 oct 13 3 87 NCAR asymmetric R2A sonic s/n 119? installed
37 oct 14 2 67 ETL asymmetric R2A sonic s/n
38/41 oct 16 1 112 [A]symmetric Gill sonic realigned to have
'north' pointing outward from the boom arm
39/42 oct 16 3 87 [a]Symmetric Gill sonic realigned to have
'north' pointing outward from the boom arm
212 jan 13 4 123 Removed Florida's sonic and TRH for
installation at Baltimore.
3 87 Installed Baltimore's sonic and TRH, with
sonic heater modifications made to them, at
Florida.
216 jan 15 4 87 Removed sonic and TRH from Florida to install
at Atlanta.
217 jan 15 1 87 Installed modified TRH and sonic with head
heaters.
221 jan 17 4 112 Installed Atlanta's old TRH and sonic at
Florida. Sonic now has head heaters on it.
258 feb 13 2 67 Retrieved in apparently operational condition
... the sonic unit...
267 feb 20 4 112 Inspected Florida in order to decide how to
replace Gill sonic with ATI sonic
282 feb 26 4 0202 install ATI and to try to get ATi to operate.
328 mar 21 1 0202 Replaced Gill sonic with Fla ATI
329 mar 21 4 87 Gill sonic from Atl put back on
348 apr 1 4 87 Florida moved. The orientation of the sonic
is at 360 deg true and the T/RH is at 86 deg
true.
349 apr 1 4 87 The Gill sonic head was rotated so N arrow is
now due north by removing two of the three set
screws, since the N arrow was originally about
10-15 deg off (CCW viewed from the top) from
the sonic arm.
362 apr 6 2 0303 Installed ATI #3 on Cleveland for check
against Fla. Both sonics [Fla] pointing N.
ATI boom: 333 + 23 variation
TRH boom: 66 + 23 variation
ATI is approximately .5-m lower than Gill.
Have not measured vertical distance to snow
surface (of today)
- 382: Rad_System, Site 2, Sat 11-Apr-1998 16:10:49 AKDT, Clev. vs Fla. Radiometer w/both domes
Clev. outter domes reinstalled on 4/11 2:30Z
SWin very consistent between Cle. and Fla.
SWout of Clev. is ~25w/m**2 low. This could be due to either the
dome scratch which occured during the station crunch, or
some antifog we tried to determine whether that would inhibit
icing (it didn't).
4/12 2:15Z SWout dome on Cle. cleaned with alcohol to try to
improve the reading vs Fla.
All domes Fla,Cle,Etl were clean.
- 383: Daily_Status, Site all, Sat 11-Apr-1998 16:24:03 AKDT, Daily_Status
From 4/10/98 14Z through 4/11/98 14Z
WEATHER: -16 to -10C,
Healthy Winds from 5-10m/s from east
Clearing later.
AM 4/11, bright, clear. Big lead between ship and runway
is now a big ridge. At least some leads on route to Balt.
also closed; looks rougher.
Saturday, today, is aircraft day for logistics crew.
BASE: OK, qcplot indicating some data gaps in Fla,Clev,Atl
that are inconsistent with what 'show_met/rad' have.
STATIONS: Atl: Up, Data gap ~17:50 - 19:10
Has 2 PV's
Balt: Down
Ran out of fuel on 4/9
Clev: Up, Data gap ~12:45 - 16:45 AKDT
Bad Tsoil, SW domes on
4-comp off for awhile
Has 2 PV's
Fla: Up, Data gap ~12:45 - 16:45 AKDT
Has 1 PV, Wind Gen.
VOLT/CUR: Atl 14.5, .7/1.1 Cycling max-iload,
Cle 13.8, .75/1.1
Apparent pulsing on imaxcharge
like Atl doesn't show up so much after wind-gen
removed. Believe to be sample timing of A/D.
Bal 0.0
Fla 13.0, Additional load with 2nd 4-comp heater. Wind gen
installed from Clev to help with load.
NOTE: with wind gen. the vbatt nicely hit and
stayed on 14.5; encouraging but....
4/11 removed wind gen. which was causing monitor
circuit headaches: ground problem, plus
there is a question about the 'earth' ground
and internal wiring because of difference between
unit NCAR wired per instructions and ABS Alaska did.
All stations with PV are showing some charging via that
generally appears to be about .36-A per
panel in clear sun. Ie not enough to
run station, but could really help for boosting
4-comp heater, or resurrecting a down station
for awhile.
BOX TEMPS: Atl 15-2 deg.
Cle 10- -2 deg.
Bal.
Fla 25-10 deg.
SONICS: All flags OK. Fla shows 1 heating cycle ~ 19:30Z 4/11..why?
no riming anywhere to be seen.
Bal:
Wdir: consistent except Clev.
Checked via EVE: looks consistent w/ observed
last night (4/11 early Z).
GPS apparently not connected, no declination.
However Atl and Cle. wind components look 90-deg
different (station orientation issue)
Wspd: Fla. shows higher than Clev. by about 1 m/s Wind coming
through Fla tower toward Clev. and higher Gill
than ATI
Atl more consistent w/Clev. (both ATI)
W: Atl, Cle w/ATI's clearly lower variation in magnitudes, very
suspicious will wait to deploy ATI to Balt.
PRES: Consistent, cyle from ~1021.5 down to 1018.5 rising to 1020
T: Consistent, general drop from -11 to -19, with nice bit of warm,
moister air coming through around 1-4:30Z 4/11
(apparently not accompanied by wdir shift although
nice strong winds around 4:30)...leads closing fast
around here.
RH: Consistent waveforms, ~90-80%,
Fla. shows ~4% higher than adjacent Clev.
4-Component Rad:
Consistent waveforms
Fla/Clev. All domes clear. Plenty of wind.
Atl, OK
Cle OK, Outter SW domes installed by ~2:30Z 4/11
NOTE SWin w/domes very consistent with Fla.
but SWout is ~25w/m**2 lower. This is caused
either by the scratch on the outter dome, or
our attempt to passively de-ice using an antifog.
BAL Down
Fla. OK
LW shows nice clear sky and cloud moving over around 11-13Z
T/Gsoil: Atl Still in slush around -1.9C, G at ~-1.8w/m**2
Cle G Installed ~0Z 4/11, ~3w/m**2, no T
Bal. Down
Fla Tsoil put at snow/ice ~0Z 4/11, ~-9, G ~1.2w/m**2
LEVELS: Atl x is off ~ -1.0, y ~.1
Cel x ~.0, y ~ .5
Bal Not installed
Fla x ~.4, y ~.1
COMPASS: Consistent similar slow rotations of ~2 deg for Atl,Cle,Fla.
MISCELLANEOUS:
- 384: Visit_Log, Site 1, Sat 11-Apr-1998 17:50:42 AKDT, Atlanta measurements
4/11 ~23:30gmt
Height from snow surface to bottom of sonic boom: 7' 5".
Sonic arm points 51 degrees east of north.
TRH/compass arm points 145 degrees east of north.
All domes were clean.
Water inside sled box was frozen solid.
3' wide lead about 150' east of site.
Fresh soft snow several inches deep all around site.
- 385: Sonic, Site 2, Sat 11-Apr-1998 21:09:54 AKDT, Cle. GPS reinstalled, Splus Wdir should come out
4/12 2:20Z
Reinserted the GPS cable into EVE which had been out.
With the GPS declanation, and updated orientation.
the Splus plots should now come out right.
Confirmed ATI sonic was reporting consistent values on EVE
for the observed wind.
- 386: Sonic, Site all, Sat 11-Apr-1998 21:16:15 AKDT, Current Sonic Heights
Sonic height above the snow were measured today:
Atl: ATI 89"
Cle: ATI 111"
Fla: gill 131"
- 387: Daily_Status, Site all, Sun 12-Apr-1998 22:23:39 AKDT, Daily_Status
From 4/11/98 14Z through 4/12/98 14Z
WEATHER: -12 to -21C,
Healthy Winds from 5-8m/s from east, colder than previous day.
AM 4/12, bright, clear.
Ice cracked around ship during night. 2 huts had to be moved.
Lots of little cracks around the area. Wind hodling the ice
together.
Sunday, today, is another aircraft day for logistics crew.
BASE: Up. Qcplots did not run properly. /home full.
Purged some netcdf files for Oct/Nov. Splus likes to crash alot.
STATIONS: Atl: Up, Has 2 PV's
Balt: Down Ran out of fuel on 4/9
Clev: Up, SW domes on
Has 2 PV's
Fla: Up, Has 1 PV, Wind Gen.
VOLT/CUR: Atl 14.5, .8/1.1 Cycling max-iload,
Cle 13.7, .8/1.2
some pulsing on imaxcharge
Bal 0.0 Down
Fla 12.7,1.6/1.7 Additional load with 2nd 4-comp heater.
Operated without wind gen., just 1-PV and TEG.
Overnight the vbatt slowly dropped from 13 to 12.7
indicating both under charged batt and error
in iload/icharge reported. Disconnected internal
batt box ground, readings 'improved' to show true
load/charge relationship on 4/12.
BOX TEMPS: Atl -3 - 3 deg.
Cle -10- 0 deg.
Bal. Down
Fla 10 deg.
SONICS: All flags OK. Cle shows 1 heating cycle ~ 2:30Z 4/12
no riming anywhere to be seen.
Bal:
Wdir: consistent even Clev. now that GPS connected.
Wspd: Fla. very consistent w/ Clev.
Atl lower in higher winds by about 1.5m/s (6-8m/s
W: OK. Atl may have boom level out. More variation in Gill at Fla.
Experts consider ATI doing better.
PRES: Consistent, drop from ~1022 down to 1020
T: Consistent, general drop from ~-12 to -21,
RH: Consistent waveforms, ~75-82%,
Fla. shows ~4-6% higher than adjacent Clev.
4-Component Rad:
Consistent waveforms
Fla/Clev. Both domes on, All domes clear.
Atl, OK
Cle OK, Outter SW domes installed by ~2:30Z 4/11
NOTE SWin w/domes very consistent with Fla.
but SWout is ~25w/m**2 lower. This is caused
either by the scratch on the outter dome, or
our attempt to passively de-ice using an antifog.
BAL Down
Fla. OK
LW shows nice clear sky and cloud moving over around 11-13Z
T/Gsoil: Atl Still in slush around -1.9C, G rising from ~-2.2 to -1.9w/m**2
Cle ~-5.95C, -G dropping ~4.2 to 3.8w/m**2, no T
Bal. Down
Fla ~-8.7, ~3C colder than nearby Clev., G ~2.0w/m**2
Double checked the s/n of loggers and sensors at Fla/Cle.
LEVELS: Atl x is off ~ -1.0, y ~.1
Cel x ~.0, y ~ .5
Bal Not installed
Fla x ~.4, y ~.1
COMPASS: Consistent waveforms
MISCELLANEOUS:
- 388: Thermal_Generators, Site 4, Sun 12-Apr-1998 22:31:33 AKDT, TEG work / Power system Clev./Fla.
These are a variety of notes taken during the last couple of days
plopped here for safekeeping....
4/12 2:50Z Cleveland TEG air adjusted
Turned air shutter down (CCW) 3/4 turn
using the 'blue-flame' then back-off optimization method recommended
by Global. Ie. teg appears to have been running a bit air-rich.
Disconnected PV to watch results.
Very odd...both iload and icharge seem to have risen by an equivalent
amount: perhaps .1 Amp. After looking at Fla charge/load currents
on 4/12 ~18Z I don't have complete faith that the readings are totally
accurate. Suspect that the charging did improve a bit and feedback
into load circuit monitor.
It occured to me however, that if the deposits Jeff has seen are formed
by not enough air (as 1 hypothesis of Global) then this might be bass-
akwards and it might be better to return to air rich and reduce fuel
pressure. With the addition of 2 - 2.5" air holes though the oxygen
starvation question should addressed. Increasing the fuel rich, could
reduce the fuel endurance though.
Preliminary Conclusion from noticing rise in current and further
TEG observations to be noted below: TEG performance improved.
4/12 16:30Z Fla.
- Ran overnight with TEG and 1-PV. Load high with 2 30ohm heaters
going on 4-comp SW.
Batt dropped to 12.85 after disconnecting wind and dropped to 12.7 by
morning. Iload=1.48,Icharge=1.77 on EVE.
Ie battery not fully charged and charge monitor circuit is
off. Disconnected internal batt box ground, pin 16. Iload=1.883,
Icharge=1.728. This strikes me as closer to truth
but didn't have stuff to measure w/meter.
Added wind gen back on to run station while inspecting TEG. Plenty
of wind and juice for job. Still have noise/ground-loop problem
on current monitors.
- TEG Inspection: Yukko.
Shut down teg and removed from sled for working inside met hut.
Removal of the internal filter is impossible with teg in sled and
awkward with it out....not field procedure in arctic.
Internal Filter looked clean.
However golden yellow sticky goo mixed w/what looks like thread seal
inside of trap. Stuff will not flow out of the drain plug.
Took sample to bring to Boulder. Very smelly and messy. Also
saw it on teg rail and some fittings indicating it oozed out sometime.
This goo also appears to be inside of the lines, but they are clear
enough to keep working.
Upstream Inline Filter inspected:
Filter looked clean, but same residue was in the trap. Jeff later said
he hadn't seem that on last inspect 1-2 mos ago.
Cleaned housing and Replaced Internal Filter (since we have new
ones and just in case).
Nozzle replaced: However it looked pretty clean and Jeff said it was
the best he'd seen of one being replaced.
Conclusion 1: the inline filter helps and these need to be added to
the other 3 stations.
Conclusion 2: This crap is in the fuel itself (need to confirm) or was
from liquid propane condensing at some point. The residue on the nozzles
is probably this stuff bubbling through and not being caused by lack
of oxygen.
23:03 Restarted TEG (after reinstallation in sled)
23:33 VOC = 3.77 (Rated = 3.87), Pressure = 71 Kpa (Rated 64)
00:30 VOC = 3.865.......This should be the stabilized output (good)
but will keep open through night and recheck in am.
May need to adjust regulator down a bit and air mixture
like Cle.
4/12 23:05Z Cle TEG
Shutdown of TEG, removal for inspection
Same residue but more liquid and began slowly dripping from pres. reg
intake. This line was pretty fouled and even though the generator is
running much more of this could clog it, or maybe it's bubbling up
into the nozzle which was much dirtier than Fla.
Need to clean fittings at ship.
Running overnight on battery and 1-PV
So, is the battery good/fully charged?
4/13 4:00Z Fla Wind Gen
This hummer was causing noise in the sodar (really nice winds!)
disrupting data. Shut down
Running overnight on battery and 1-PV
So, is the battery good/fully charged? (had ~10 hours on windgen)
4/13 23:30Z Atl TEG
Replaced TEG w/ cleaned unit from Cle. which was reassembledt
his am. Also added in-line filter.
Examined Atl teg atShip for contamination: yuk, much worse than
Fla or Cle TEG. Internal filter actually 1/2 clogged. Lots of
liquid. Oozing out of pressure switch. Need to clean fittings
at ship. Nozzle very dirty also.
4/15 Bal TEG
Replaced TEG on 4/14. Examined on 4/15. Extremely gunked,
perhaps worst of the lot. Substantial amount oozed out of pressure
switch and a little out of steel hose 'downstream' from the internal
filter. Cleaned, replaced nozzle, replaced filter.
- 389: Visit_Log, Site 1, Mon 13-Apr-1998 21:51:21 AKDT, Atlanta Visit
Atlanta Visit 4/13 ~22:15- 4/14 00:15
Replaced TEG:
Installed old Clev. TEG.
Atl. teg taken apart later: very fouled with oil.
See note with previous comments on power system.
Replaced Propane: 1 tank empty. 1 tank 5/6 full.
TEG startup only via nap-gas torch. 2V battery had a
bit of snow around it and sparking wasn't good. Hope
it keeps running and charges that.
ATI boom angle: 228 + ~23 decl. = 251 looking at front
of ATI down boom.
Did not swap flash card.
NOTE: Sled almost covered by blowing snow.
PV installed a few days ago covered. Only
decent air intake was top vent and cable inlet.
Uncovered sled and
chopped out fair amount of ice. Ice inside box.
Will need to move this sled before sink or swim
as it warms. Lead from a few days ago S. of
station now snow covered small ridge about 20
yds away running NW,SE
Opened hole in bottom to drain any water.
- 390: Rad_System, Site 4, Mon 13-Apr-1998 22:13:47 AKDT, Fla SWout heater disconnected
The Fla Station load without the wind generator was draining the battery
to 12.7 by this evening. On the off chance that there are riming conditions
tonight I disconnected the extra load so that the station will keep running
and we can observe the SWin heater performance.
- 391: , Site 4, Mon 13-Apr-1998 22:16:52 AKDT, Fla Wind Gen Work
- 392: Sonic, Site 2, Mon 13-Apr-1998 22:28:19 AKDT, Cle. ATI removed
4/13 18:25Z
Anticipating a trip to Balt when the weather is better, removed ATI
from Clev.
- 393: Daily_Status, Site all, Tue 14-Apr-1998 07:15:22 AKDT, Daily_Status
From 4/13/98 14Z through 4/14/98 14Z
WEATHER: -20 rising to -14C,
4/14 am high overcast some fog, Light winds, later clear, good
visible contrast
4/15 am overcast
BASE: Up.
STATIONS: Atl: Up, Has 2 PV's
Balt: Down Ran out of fuel on 4/9
Clev: Up, SW domes on
Has 1 PV, running on PV/batt
Fla: Up, Has 1 PV,
VOLT/CUR: Atl 14.5, .8/1.1 Cycling max-iload,
Cle 13.7, .8/1.2
Running on battery while teg cleaning/cycling
Bal 0.0 Down
Fla 12.7,1.6/1.7 Additional load with 2nd 4-comp heater.
1-PV and TEG.
Overnight the vbatt slowly dropping from 13 to 12.7
indicating both under charged batt and error
in iload/icharge reported. Disconnected internal
batt box ground, readings 'improved' to show true
load/charge relationship on 4/12.
BOX TEMPS: Atl -3 - 3 deg.
Cle -10- 0 deg.
Bal. Down
Fla 10 deg.
SONICS: Cle ATI removed.
All flags OK.
Bal:
Wdir: consistent even Clev. now that GPS connected.
Wspd: Fla. very consistent w/ Clev.
Atl lower in higher winds by about 1.5m/s (6-8m/s
W: OK. Atl may have boom level out. More variation in Gill at Fla.
PRES: Consistent, drop from ~1019 down to 1014
T: Consistent, general rise from ~-20 to -14,
RH: Consistent waveforms Cle/Fla, ~72-87%,
Atl shows less variation that Cle./Fla. more moist than Cle. 78-85%
2 days ago there was a small nearby lead.
Fla shows ~3-4% higher than adjacent Clev.
4-Component Rad:
Consistent waveforms Max SWin ~350,
Fla/Clev. Both domes on, All domes clear.
Atl, OK, domes clear
Cle OK, Outter SW domes installed by ~2:30Z 4/11
NOTE SWin w/domes very consistent with Fla.
Cleaned SWout now consistent with Fla.
BAL Down
Fla. OK
T/Gsoil: Atl Still in slush/ice around -1.9C, G rising at ~-1.8 w/m**2
Cle ~-5.85C, -G ~ 3.9 w/m**2
Bal. Down
Fla ~-8.8, ~3C colder than nearby Clev., G ~2.1 slow cylc up/back w/m**2
LEVELS: Atl x is off ~ -1.0, y ~.2
Cel x ~.0, y ~ .5
Bal Not installed
Fla x ~.4, y ~.1
COMPASS: OK, Shows less variation than last few days.
MISCELLANEOUS:
- 394: Rad_System, Site 4, Tue 14-Apr-1998 12:54:55 AKDT, Clev. vs Fla SW
4/14 18Z
Observed Domes: All clear but the SWin at Clev.
It had light crusty ice crystals over ~40% on top.
Fla. SWin was clean. It has 30-ohm minco heater
under dome and 'juice-can' vent vs 'jet-intake'
I prefer the juice-can configuration but this may
be a case where the heater in light rime/icing
conditions kept the dome clear.
Plots indicate Clev. reading higher when sun up
by 25-30W/m**2 (clear morning up to 400w/m**2)
- 395: Visit_Log, Site 3, Tue 14-Apr-1998 13:00:40 AKDT, Balt Visit
4/14 ~14:45 - 18:15 AKDT
Service Visit to Balt.
Site Condition: ~2.5 deep snow all around.
Rough ice. Dug out sled completely.
Will have problems with water here
later on no doubt.
Swap TEG: New one was from Atlanta which had been cleaned today.
Refuel Propane
1 bottle was full, the other was empty.
Appears that the check-valve on one wasn't
released.
Swapped Battery: replacement=10.8, new=13.1
Replace Gill #123 with ATI #302
Angle of Gill with respect to boom = OK., arrow pointing
correctly outward from boom.
Height ATI = ~8' above the snow.
Boom angle = 34 deg. magnetic (uncorrected)
Added passive vent
2 PV installed
Swap Flash card
Copied new config from flash. Had trouble doing
that. Appeared that the file was corrupted. Had
to reload using xmodem. Seemed OK.
4-comp Reinstalled.
New ventillation system.
Leveled.
Height ~5.5'
NOTE: Station reported for about 30 minutes then died after we left.
Console operation seemed OK, all sensor reporting reasonable
values and power system also.
NOTE2: 4/15am local..
Naturally after seeing the station go back down, cursing, etc.
and about the time wrapping up base for night, station came back
up and has been reporting for last 7 hours....wierd.
Surmise maybe it just took awhile for things to warm up, maybe
esp. the VME Backplane because of the bad initial copy of the
stored cfg from flash and subsequent effort to download direct
from Rocky. That might be consistent w/periodic outages of this
stations' flash data over last 4-5 months. Also note that initial
reporting showed Tbox at -15 deg which is consistent w/EVE box
resurrection of unit undergoing test in chamber last fall (this
box?) Anyway, that's probably it.
Will monitor and hopefully build up new VME/chasis and swap after
few days on next visit.
- 396: Daily_Status, Site all, Wed 15-Apr-1998 07:48:19 AKDT, Daily_Status
From 4/14/98 14Z through 4/15/98 14Z
WEATHER: - Temps varying around -15C
4/14 am high overcast some fog, Light winds, later clear, good
visible contrast. Winds from E (5-6.5 lowering to 4-5)
4/15 am overcast
BASE: OK.
STATIONS: Atl: Up, Has 2 PV's
Balt: Up, 2 PVs
Clev: Up, SW domes on
Has 1 PV, running on PV/batt
Fla: Up, Has 1 PV,
VOLT/CUR: Atl 14.5, .8/1.1 Cycling max-iload,
Cle 11.7 (in am), .8/(over 2 during sun, then tapering to 0)
Running on battery while teg cleaning/cycling,
can see 1 PV helping out during day.
No sonic.
Bal 12.9,1.0/1.3 Service visit ending 4/15 ~1:00Z. Station
went down shortly after leaving, then came
back at ~3:00Z.
2-PV, maybe just too time to warm up?
Fla 12.5,1.6/1.7 Additional load with 2nd 4-comp heater.
1-PV, TEG and wind gen connected.
1 SWin heater
Iload/charge data garbage w/win-gen plugged in.
BOX TEMPS: Atl ~20 deg. fairly constant
Cle -10 deg. fairly constant
Bal. ~5 deg. after coming up. (initially reported at about -15)
Fla 10 deg.
SONICS: Cle No sonic.
All flags OK.
Bal:
Wdir: Consistent, need to edit orientation.dat for Balt. w/ATI
Wspd: Consistent
W: OK. Balt/Atl may have boom level issue.
PRES: Consistent, drop from ~1009 down to 1005
T: Consistent, general cycle around -16, min-18,max-14
RH: Consistent waveforms Cle/Fla, ~70-85% for Cle, 80-85% Atl,
Bal around 85 for data so far.
Atl shows less variation that Cle./Fla. more moist
Fla shows ~3-4% higher than adjacent Clev.
4-Component Rad:
Consistent looking waveforms Max SWin ~350,
Fla/Clev. Both domes on, Note logged small amount of ice
on Fla yesterday am. Did not clean. Note signal
is higher than Clev. by maybe 25 w/m**2.
All other domes were clear.
Atl, OK,
Cle OK, Outter SW domes installed by ~2:30Z 4/11
BAL Reinstalled on 4/15 1:Z, consistent looking
T/Gsoil: Atl Still in slush/ice around -1.9C, G at ~ -1.3 w/m**2
Cle ~-5.55C rising, -G ~ 3.1 w/m**2
Bal. Reinstalled, T ~ -7.1, G rising from 4.5 to 5.5
Fla ~-8.35 rising, ~3C colder than nearby Clev., G ~2.1 slow cylc up/back w/m**2
LEVELS: Atl x ~ -1.0, y ~.2
Cel x ~.0, y ~ .5
Bal Reinstalled x~.5, y~.4
Fla x ~.4, y ~.3
COMPASS: OK, Consistent looking. All show variations ~1-deg over period.
MISCELLANEOUS:
- 397: Visit_Log, Site 4, Wed 15-Apr-1998 13:17:09 AKDT, Fla,Cle radiometers-riming/frost
4/15 17:00 - 18:00 UTC
Frost and riming on radiometers overnight at Met Hut. Heater installed under plate holding outer dome down on SW in on Fla appears to have significantly reduced the riming/frost on the outer dome. Details:
Eppleys: SW in - light-moderate frost/riming
SW out - light frost/riming
LW in,out - no frost/riming
Fla: SW in - light frost/riming
SW out - moderate-heavy frost/riming
LW in,out - light frost/riming
Cle: SW in - moderate-heavy frost/riming
SW out - moderate-heavy frost/riming
LW in.out - light frost/riming
Photos were taken of frost/riming on all systems. The ventilation systems were running on all three systems. Fla had the "juice can" system. Need to make sure that SW data on Fla not affected by heater. SW-in at Fla on April 13-14 looks slightly suppressed compared to Cle, but probably OK since nighttime "0" values actually slightly negative for Fla.
IMPORTANT: Strongly considering adding heaters to all PAM SW systems. Please let us know soon if you think this will be OK or if you would like further testing.
- 398: Daily_Status, Site all, Thu 16-Apr-1998 14:18:15 AKDT, Daily_Status
From 4/15/98 14Z through 4/16/98 16Z
WEATHER: - Temps varying around -15C
4/15 am high overcast some fog, NE winds 4-5.5 m/s, later clear, good
visible contrast.
4/16 am overcast, foggy
BASE: Pampoll died yesterday, had to reboot. Everything came up OK.
STATIONS: Atl: Up, Has 2 PV's
Balt: Up 2 PV
Clev: Up, SW domes on
Has 1 PV, running on PV/batt until ~1z 5/16 when
TEG reinstalled. Wind Gen installed at about
3Z.
Fla: Up, Has 1 PV
VOLT/CUR: Atl 14.5, .8/1.1 Cycling max-iload,
Cle 11.7 (in am), .8/(over 2 during sun, then tapering to 0)
Running on battery while teg cleaning/cycling,
can see 1 PV helping out during day. When
wind gen installed, iload/icharge become nonsense.
No sonic.
Bal 12.9,.8/1.3
2-PV, TEG.
Fla 12.0,1.6/1.7 Additional load with 2nd 4-comp heater.
1-PV, TEG ran out.
1 SWin heater
Iload/charge data garbage w/win-gen plugged in.
BOX TEMPS: Atl ~15 deg. fairly constant
Cle -10 rising to 10 when TEG reinstalled.
Bal. ~5 deg. fairly constant
Fla 15 dropping to -7 when TEG ran out.
SONICS: Cle No sonic.
All flags OK.
Bal: Lower wind speeds, 1 glitch at about 1Z 4/16
Wdir: Consistent, winds from NE
Wspd: Consistent
W: OK. Balt/Atl may have boom level issue.
PRES: Consistent, rising from ~1005 to 1008
T: Consistent,max -13, min -18
RH: Consistent waveforms Cle/Fla, ~70-85% for Cle, 80-85% Atl,
Bal around 85 for data so far.
Atl/Bal show less variation that Cle./Fla.
Fla shows ~3-4% higher than adjacent Clev.
4-Component Rad:
Consistent looking waveforms Max SWin ~320,
Fla/Clev. Both domes on, Note small amount of ice
on domes in am; see log.
Atl, OK,
Cle OK, Outter SW domes installed by ~2:30Z 4/11
BAL Reinstalled on 4/15 1:Z, consistent looking
T/Gsoil: Atl Still in slush/ice around -2C, G at ~ -1.2 w/m**2
Cle ~-5, -G ~ 3.1 w/m**2
Bal. T ~ -7.1, G ~5
Fla ~-8.1, ~3deg colder than nearby Clev., G ~1.3
LEVELS: Atl x ~ -1.0, y ~.2
Cel x ~.0, y ~ .5
Bal Reinstalled x~.5, y~.4
Fla x ~.4, y ~.3
COMPASS: OK, Consistent looking. More variations in Atl/Fla ~1.5 deg over period.
MISCELLANEOUS:
- 399: sled-2, Site 2, Thu 16-Apr-1998 14:22:09 AKDT, Clev TEG / Wind Gen. work
4/16 0z Installed cleaned TEG that came out of Baltimore.
Installed in-line filter to hopefully help trap-crap.
Started easily.
4/16 3Z
Installed wind generator at Clev.
This is the unit that was wired correctly by the manuf. for
single phase.
Works better in all respects than the other unit which was
mis-wired. Still have ground plane noise.
Still need to improve earth ground.
4/16 18Z Removed and set aside for anticipated move to Balt.
- 400: sled-2, Site 2, Thu 16-Apr-1998 14:26:00 AKDT, Clev. sled moved to Seattle Site: new name
4/16 17Z Took down Cleveland station sitting next to Fla.
near met hut.
Moved to Seattle site ~.9-1km N of ship.
Installation totally different than others per Jumper's help.
He's warning about the meltdown coming within next 1 or so
months.
Installed sled on top of 3 4x8' sheets of plywood as ablation
shield to help keep it from sinking in.
Installed tripods on top of 6 4x4' sheets of plywood.
NEED TO: paint plywood white and add white skirting later
to help protect ice underneath.
Sonic Installed on 4/18 3:30Z
Sonic boom height = 136" to center of Gill
angle = 337-deg magnetic
Rad Boom height = 78"
angle = 160-deg magnetic
TRH boom anble = 69-deg magnetic
TRH boom Alignment
- 401: Rad_System, Site all, Thu 16-Apr-1998 20:20:57 AKDT, Calibration of Level Sensors: Offset in fit
John, Jeff:
Kurt ran some tests on the level sensor from Baltimore. The error we
see agrees with the data from Baltimore when the sensor was installed
there. We talked to Geomechanics about re-calibrating the sensor and
found out the source of our error. It is in the calibration data set
they provide us. After they calibrate the sensor, they remove the offset
from the fit. As an example, their data shows the y axis of the
Baltimore sensor was off by -2.46 degrees when the output signal was 0.0
volts. Kurt's test data gives an offset of -2.39 degrees. These numbers
are in agreemnet with the logbook entries. I have asked Geomechanics to
send us the offset values for all the level sensors so we can apply
corrections. One of you should add this comment to logbook so it is
documented.
Thanks!
Steve
PS - We did let Geomechanics know that their data sheets do not mention
anything about this offset!
- 402: Visit_Log, Site 1, Fri 17-Apr-1998 18:38:41 AKDT, Atl sled moved.
Atlanta Visit:
Dug out and repositioned sled with ablation shield of 3 4x8'
sheets of ply beneath, then recovered ply with snow.
New position will obscure sonic from ~350 true -335 true
Placed on ice/snow interface ~2-2.5' below surface.
Recovered Gill cable.
ATI Boom Height = 89" from snow
angle = 49-deg magnetic
TRH Boom angle = 151-deg magnetic
Radiometer height= 47" from snow
angle = 68-deg magnetic
Need to return to set pentapod footpads on plywood or else
they'll sink. Very slushy. Water oozing up from below
PVC was down in 4-6" of ice. Today was quite warm and
the snow in places is appearing to really soften.
Had to restart TEG by torch; 2V TEG battery may be
shot.
TWH changed Site number from 2 to 1 1/22/99
- 403: Daily_Status, Site all, Fri 17-Apr-1998 22:32:29 AKDT, Daily_Status
From 4/16/98 14Z through 4/17/98 14Z
WEATHER: - Temps varying around -15C
4/16 overcast but good visibility, NE to SE winds diminishing
from ~4-5.5 to 1-2 m/s,
by evening snow / blowing snow low vis.
4/17 am overcast, warm, calm
BASE: Up
STATIONS: Atl: Up, Has 2 PV's
Balt: Up 2 PV
Seat: Gap Down/Moved ~4/16, 17:30 to 4/17, 3Z
SW domes on, No sonic
Fla: Died at ~10:30Z 4/16 Battery running station drained.
no trh, down ~4/16 15:30
Power system went haywire before outage.
Uncertain exactly what was going.
VOLT/CUR: Atl 14.5, .8/1.1 Cycling max-iload,
Sea 13.8, .8/1.4
No sonic.
Bal 13.7, .8/1.3
2-PV, TEG.
Fla 11.5, 1.6/2.0? Additional load with 2nd 4-comp heater.
1-PV, TEG ran out.
1 SWin heater
BOX TEMPS: Atl rose to 30-deg
Sea rose to 30-deg after restart.
Bal. rose to 30-deg
Fla rose to 30-deg
SONICS: Sea No sonic.
All flags OK.
Bal: Lower wind speeds, 1 glitch at about 1Z 4/16
Wdir: Consistent, winds from NE-SSE
Wspd: Consistent
W: OK.
PRES: Consistent, fairly stable around 1007.5
T: Consistent, slowly rising over period from -13, to -7: balmy
Fla TRH died
RH: Consistent waveforms but Balt. rose to show 100%,
Sea/Atl in upper 90's.
Good conditions for Freezing on domes.
4-Component Rad:
Consistent looking waveforms Max SWin ~430
Fla/Sea. Both domes on. Fla after restarting with new
battery accumulated less ice.
Atl, OK,
Sea OK, Interesting rpile signal ~9-14Z
BAL OK
T/Gsoil: Atl Still in slush/ice around -2C, G at ~ -.9 w/m**2
Sea ~-7.5, -G ~ -1 w/m**2
Bal. T ~ -7.2 rising to -6.6, G dropping ~5-2.0 w/m**2
Fla ~-8.0, G ~1.3
LEVELS: Atl x ~ -1.0, y ~.2
Sea x ~.0, y ~ -.2
Bal Reinstalled x~.4, y~-.3
Fla x ~.5, y ~.4
COMPASS: OK, Consistent looking. ~2.5 deg variation over period.
Fla compass died with trh
MISCELLANEOUS:
- 404: Visit_Log, Site 1, Sat 18-Apr-1998 14:42:15 AKDT, Atl sled moved...Part 2
Atlanta Visit:
Yesterday the sled was repositioned on an ablation shield.
Today we unburied the pentapod and placed plywood under the
footpads. Leveling of the tripod was as close as
we could make it under the circumstances.
The Rad. boom is somewhat worse but were able to
level with the Schwarz mount.
4x4' sheets of ply under 2 legs to the N; 4x8 and 1 4x4
are under the 3 'S' legs.
Surface Sensors:
Are clearly in the ice and slush and we did not dig them
out. We left the ~2' snow cover undisturbed over them but
extracted the cable enough to make the change.
The leg nearest the marked 'surface' sensor area was under
about 2-3" of ice whereas the cable was under about 6-8"
New position will obscure sonic from ~350 true -335 true
After setting the pentapod, we reshot the ATI / TRH boom angles
I did not reshoot the Rad boom and the discrepancies noted below
must be reconciled by double double checking at next visit
Yesterday (Ola) Today (jm)
RAD Boom angle = 50-deg mag (jm 4/21)
ATI look to N. edge of sled = 332-deg mag (jm 4/21)
ATI Boom angle = 49-deg mag 53-deg mag
TRH Boom angle = 151-deg mag 322-deg mag
-----------------------------------
ATI/TRH Diff. = 78-deg 91-deg (for orientation.dat)
Other:
~20Z Rad - cleaned domes, frosted from freezing fog/mist.
~21Z ATI - cleaned (will put in another note)
TRH - Check against ETL hand-held (which is apparently
inconsistent and usually high vs tower snsrs)
NCAR = -9.65, 92.5%
HandH= -9.3 , 85.6%
held it adjacent to trh intake
TWH changed site number from 2 to 1, 1/22/99
- 405: Sonic, Site 1, Sat 18-Apr-1998 15:03:25 AKDT, Atl Sonic Cleaned
Site Visit to Atl to 'plywood' protect pentapod:
~21Z The ATI sonic had not shown 'flags' or heating cycles
overnight despite that Fla/Sea (Gills) had and there
was a pretty good freezing mist / super cooled fog.
The ATI V transducer facing the wind was pretty well
covered in rime and ice which had to be melted off
by hand. There was some other ice on the U component.
Otherwise the 'W' looked OK.
TWH changed site number from 2 to 1, 1/22/99
- 406: Rad_System, Site all, Sat 18-Apr-1998 15:47:50 AKDT, Radiometer Icing / Fla SWin stayed clean
4/18 Freezing supercooled fog overnight
Atl Domes iced up, cleaned ~18Z or before
Florida: SWin with 30-ohm minco heater was completely clean in AM.
All others iced over.
For this case the aspirated heater under the outer dome worked
very well.
ETL domes: Had some dime-quarter sized ice on top
- 407: Daily_Status, Site all, Sat 18-Apr-1998 19:01:08 AKDT, Daily_Status
From 4/17/98 14Z through 4/18/98 14Z
WEATHER: - Temps varying around -15C
4/17 overcast but reasonable visibility, Low winds
NE to SE winds diminishing
by evening freezing super cooled fog
4/18 am overcast, calm, very foggy
BASE: Up
STATIONS: Atl: Up, 2 PV
TRH data gaps ~22:30-1Z
Balt: Up 2 PV
Seat: Up 2 PV
Fla: Up Swapped battery 4/17 19Z, back online
2 PV, no trh, down ~4/16 15:30
TRH data gap until ~19Z 4/17
RH did not come back until ~3Z 4/18
Appears to have iced up.
VOLT/CUR: Atl 14.5, .8/1.1
Sea 13.5, .8/1.4
Many heating cycles on sonic
Bal 13.2, Appears to be dropping...why? .8/1.3
Fla 12.5, Appears to be dropping and TEG also...why?
1.7/1.7 Additional load with 2nd 4-comp heater.
Several heating cycles on sonic
BOX TEMPS: All got very warm during period: outside temps high.
May still not have enough ventillation.
Atl rose to 30-deg
Sea rose to 35-deg
Bal. rose to 29-deg
Fla rose to 34-deg
SONICS: Mostly trash after freezing mist / super cooled fog
ATI stations showing essentially no flag/sample problems
Gill stations showing lots of hits during period.
However:
Bal: ATI appears down: many glitches 16-19:30 Z
Died ~7Z
Atl: Only 1 heat cycle/flag at about 19:30Z
Discovered ice on V during service visit
Sea: Many heating cycles/spikes beginning 2Z, and esp 9Z,
Fla: Appears to have lots of glitching, heating cycles
beginning roughly 9Z
Wdir:
Wspd:
PRES: Consistent, fairly stable around 1010
T: Consistent, slowly dropping over period from -8, to -11: balmy!
RH: Consistent waveforms 92-100%
Good conditions for Freezing on domes.
4-Component Rad:
Consistent looking waveforms Max SWin ~280
By am 4/18 AKDT certainly most every dome was iced up.
NOTE: Fla SWin with minco heater was the only dome that was
examined in am that was clean, including ETL's
Atl OK, data gap 22:30 - 0:30Z 4/18
Sea OK, rpilein unusual, indicating up to ~70w/m**2
during ice event and between 14-22Z 4/17 up to 150
BAL OK
Fla Back up at ~19Z
T/Gsoil: Atl Still in slush/ice around -2C, G at ~ -.9 w/m**2
Sea Interesting diurnal cycle ~-7.5 cycling to -5.5 and back,
-G 0 cycling to -7 and back w/m**2
Bal. T ~ -6.6 rising to -6, G dropping ~2.0 to .4 w/m**2
Fla T ~-7.65, G ~.9 to .5
LEVELS: Atl x ~ -1.0, y ~.2
Sea x ~.0, y ~ -.2
Bal Reinstalled x~.4, y~-.3
Fla x ~.7, y ~.4
COMPASS: Sea,Fla spiking around ice event, Atl once
MISCELLANEOUS:
- 408: Daily_Status, Site all, Sun 19-Apr-1998 13:10:28 AKDT, Daily_Status
From 4/18/98 14Z through 4/19/98 14Z
WEATHER: - Temps varying around -15C
4/18 overcast w/ so-so visibility, Low winds
NE to SE shifting to N in am
4/19 am overcast, calm, foggy
BASE: Up
STATIONS: Atl: Up, 2 PV
Balt: Up 2 PV
Seat: Up 2 PV
Fla: Up 2 PV,
VOLT/CUR: Atl 14.5, .8/1.4
Sea 13.5, .7/1.4
Many heating cycles on sonic
Bal 13.3, Appears to be dropping...why? .7/1.2 varying
and not just w/sun but maybe diffuse light on PV.
Fla 13.0, Appears to be dropping and TEG also...why?
1.7/1.7 Additional load with 2nd 4-comp heater.
Some heating cycles on sonic.
PV clearly helping during 'day'
BOX TEMPS: All are warm during period: outside temps high.
May still not have enough ventillation.
Atl as high as 35, then down to 25
Sea as high as 40, then down to 35-deg
Bal. down to 20-deg
Fla as high as 40, then down to 30-deg
SONICS: Bal: ATI came back up ~21Z 4/18
Atl: OK: note discovered ice on V during service visit
Sea: Yuk, trash. Many heating cycles/spikes through entire period.
Slowly getting better
Fla: Some ice glitching, heating cycles in beginning of period
Wdir:
Wspd:
PRES: Consistent, fairly stable around 1011
T: Consistent, Bal/Atl show sharp cool air passage in middle of period.
Otherwise Temps slowly rising from -10.5 to -9
RH: Consistent waveforms 92-93%, Fla still high by ~3%
4-Component Rad:
Consistent looking waveforms Max SWin ~330
By am 4/18 AKDT certainly most every dome was iced up.
NOTE: Fla SWin and SWout both with minco heaters had a little
bit of ice on them. ETL Eppley with high power vent/heat
had somewhat more ice that Fla. system did.
LW's were OK for both Fla/ETL
LW were OK.
Atl OK, Presumed iced a bit given inspection of Fla
Sea OK, Presumed iced a bit given inspection of Fla
BAL OK, Presumed iced a bit given inspection of Fla
T/Gsoil: Atl OK, Still in slush/ice around -2C, G at ~ -.6 w/m**2
Sea Interesting diurnal cycle again ~-7.0 cycling to -5.0 and back,
-G 0 cycling to -6 and back w/m**2
Bal. T ~ -6, G varying ~2.0 to .8 w/m**2
Fla T ~-7.3, G ~.45
LEVELS: Atl x ~ -1.0, y ~.2
Sea x ~.0, y ~ -.2
Bal Reinstalled x~.4, y~-.3
Fla x ~.7, y ~.4
COMPASS: Sea,Fla spiking with Gill heater cycling.
MISCELLANEOUS:
- 409: Rad_System, Site 2, Sun 19-Apr-1998 21:26:31 AKDT, Seattle SW heaters added
Visit_Log
Radiation System
4/19 22:45Z Cleaned 1/2 dollar size ice off SWin
4/19 23:30Z - 4/20 4:30 Worked on SW sensors,
Unable to install Minco heaters on site
in cold. Returned to Ship with sensors,
installed heaters, and got them back
online by 20:30 AKDT.
- 410: sled-4, Site 4, Sun 19-Apr-1998 21:38:49 AKDT, Wind Gen. Added to Fla
4/19 22:15-Z
Installed wind generator on Fla.
Egads for some reason the thing now seems to want to work.
It had been on auto brake for several days (including
when the wind was too low) after rewiring it the correct way.
Icharge/Iload hosed by the ground loop/noise, but the
generator is running the station and charging the batt.
- 411: sled-4, Site 4, Mon 20-Apr-1998 21:35:37 AKDT, Florida moved slightly North of old location
4/20 ~19Z to 4/21 ~0Z
The Florida station was moved roughly 200-m north (rough estimate)
of the old location just outside the met hut. The new site is on top
of a hummock with ice underneath that is supposed to be 6-m or so thick.
This is a low, and older pressure ridge that we hope may hold together.
As a result, no ablation shield was put under this system.
It should still be close enough for training and system checkout, but
out far enough to provide better exposure.
The Wind Generator was removed from Florida and will be moved to Atlanta
when conditions permit.
To Be continued ( need to re-shoot these.....)
Sonic Arm orientation =
height =
TRH arm orientation =
Radiometer orientation =
Angles obscured by sled=
- 412: Daily_Status, Site all, Mon 20-Apr-1998 22:16:35 AKDT, Daily_Status
From 4/19/98 14Z through 4/20/98 14Z
WEATHER: - Temps varying around -14C
4/19 overcast w/ so-so visibility, winds
increasing substantially during period
from ~4-5 to 8-9 m/s from N
4/20 am overcast, strong NW winds
BASE: Up
STATIONS: Atl: Up, 2 PV
Balt: Up 2 PV
Seat: Up 2 PV, 2 SW heaters
Fla: Up 2 PV, 2 SW heaters
VOLT/CUR: Atl 14.5, .8/1.4
Sea 13.0, .7/1.4
Bal 13.2, .8/1.2
Fla 14.5, 1.7/2.0 w/PV, trashed current readings when
Added wind generator, quick charge on battery
brining it right up within ~10 hours.
BOX TEMPS: All decreasing with cooling air and wind.
May still not have enough ventillation.
Atl from 25, down to 2
Sea from 35, down to 8
Bal. cycling 15 to 5 and back
Fla from 30, down to 11
SONICS: Atl: OK
Sea: Trashy looking w (though flags show 100 at start of period)
until one heating cycles on sonic around 0Z
during site visit (apparently the pampoll decided
that was needed then).
During 1st site visit, there was some rime on sonic
transducers but unable to determine to what extend
and unable to clean. Winds cleaned it nicely later
Note heating was almost constant yesterday.
Bal: OK
Fla: OK
Wdir: NE switching to NW
Wspd: 4-5 rising to 8-9m/s and back to 5-6
PRES: Consistent, drop from 1011 to 1008 and back during period.
T: Consistent, Temps slowly dropping from ~-8 to -16
RH: Consistent waveforms 92-87%, Fla still high by ~3%
4-Component Rad:
Consistent looking waveforms Max SWin ~330
NOTE:
Atl OK,
Sea OK, Down between ~00:30 - 4/19 4:30Z during installation
of both SW dome heaters
BAL OK,
Fla OK,
T/Gsoil: Atl OK, Still in slush/ice around -2C, G at ~ -.6 w/m**2
Sea Interesting diurnal cycle again ~-6.5 cycling to -5.1 and back to-7,
-G 0 cycling to -6 and back up to 3 w/m**2
Bal. T ~ -5.7, G varying ~.8 to 1.6 w/m**2
Fla T ~-7.0, G ~.4
LEVELS: Atl x ~ -1.2, y ~-.1, appears that maybe we've had some settling
Sea x ~.0, y ~ .5, appears that maybe we've had some settling
Bal x~.4, y~-.3
Fla x ~.6, y ~.6
COMPASS: All appear reasonable
MISCELLANEOUS:
- 413: Visit_Log, Site 4, Tue 21-Apr-1998 13:10:43 AKDT, Fla-ridge visit
Florida-ridge:
Yesterday the sled was moved from near the met hut about 200 m to the
north on an old ridge. No ablation shield was put down because it is on only 1-2 cm of snow and the ice is about 8 m thick at Don
Perovich's nearby measurement stakes. Here are the detailed
orientations/heights of this new installation:
sonic orientation: 345 deg mag, height: 126 inches
Radiometer arm orientation: 154 deg mag, height: 69 inches
T/RH arm orientation: 77 deg mag.
The sled is about 7-8 m to the WSW of the tripod, occupying the 228-236 deg mag sector from the sonic. The sonics on the met tower are along
the 130 deg mag radial from this new installation. The west side of the ship is at about the 162 deg mag radial. West of this, the flow will be coming over the "camp ridge" (3-4 m tall) and the operations buildings
to its west are not visible, though they may or may not influence the
flow. West of about 179 deg mag, the flow should be "natural", though
it will still be coming over the camp ridge. To the SE, the SPO met
tower at the end of the Ocean City line is on the 104 deg mag radial.
Hence, the absolutely clear sectors are: (162?)179-228, 236-360-104, all deg mag.
OTHER NOTES:
Cold temperatures (-26.5C) last night with moderate riming and frost.
FLA-ridge sonic rimed, dusted off at 1921 UTC April 21. FLA-ridge SWin only
slightly rimed on top, SWout not rimed/frosted at all. LWin and out moderately rimed/frosted. Eppley radiometers SWin and SWout moderately rimed/frosted,
while LW in and out not frosted/rimed. This shows effectiveness of new dome
heaters. All rimed/frosted radiometer domes cleaned at 1914 UTC.
- 414: Visit_Log, Site 1, Wed 22-Apr-1998 07:34:36 AKDT, Atlanta Visit: wind gen. / SW Rad. heaters
4/21 ~18-20Z Atlanta Visited.
Site has re-established itself nicely after we disturbed
it during setup of ablation shields: blowing snow once again
to the rescue.
All Domes had ice, cleaned ~18:30Z
Added:
Wind Generator.
SWin heater: 40-ohm (3x 13ohm)
SWout heater: 40-ohm
Angles checked:
ATI to N. edge of Sled = 332-deg magnetic
Rad boom = 50-deg magnetic
- 415: Visit_Log, Site 3, Wed 22-Apr-1998 07:47:50 AKDT, Balt. Visit: win-gen, ablation shield, SW heaters
4/22 ~0Z - 4Z Visited Baltimore
Added:
Ablation shield under sled (remaining in same position)
Ablation shield under pentapod (ditto)
Reburied everything and covered holes, etc.
This also reduced a little bit the size of the drift
around the sled
Wind Generator
SWin heater: 30-ohm single element
SWout heater: 40-ohm double element
Changed:
Electronics box (hoping this will improve the cold-temp
problems w/card,boot, etc. New box
has Schroff backplane, new button battery
for CPU)
1 Propane bottle
It appeared that the one we swapped out
after 7 days had quite a bit less than the
other.
NOTE: this is the same one that had been OK
last week when we had a flame-out after
only 1-bottle had been used....may still
have something going on with the lines?
keep track....
- 416: Visit_Log, Site 3, Wed 22-Apr-1998 14:14:28 AKDT, Balt. Visit: orientations, heights
4/22 ~0Z - 4Z Visited Baltimore
New Orientations/heights:
sonic arm: 36 deg mag, 97 inches
T/RH arm: 126 deg mag
radiometer arm: 205 deg mag, 61 inches
Other observations:
When arrived, SWin frosted/rimed, SWout lightly frosted, LWin,out OK
Sled oriented about same as before wrt tripod (about 290-300 deg).
SW domes need new dessicant- we had none along so needs to be done
next time.
Installed 4 braided ropes on sled for use in possible helicopter airlift
during the summer
- 417: Sonic, Site 2, Wed 22-Apr-1998 16:30:27 AKDT, Sea. ATI installed
4/22 ~18:30
Seattle:
ATI #980303 installed
Gill #123 removed
ATI boom height = 114"
NOTE: the s/n labeled on this sonic conflicts with the electronic
serial number.
The number above is the electronic id.
- 418: Rad_System, Site 2, Wed 22-Apr-1998 16:42:27 AKDT, Sea. SWout dome swapped
4/22 ~18:00 - 23 Seattle
SWout outter dome, which was slightly scratched when the Cleveland
site was crunched, was replaced with new dome.
- 419: Daily_Status, Site all, Thu 23-Apr-1998 12:50:25 AKDT, Daily_Status
From 4/22/98 14Z through 4/23/98 14Z
(apparently two days previous not done - thought John did)
WEATHER: - Temps -15 to -23C
some high clouds
good visibility
LEADS: No open water observed
BASE: Up
STATIONS: Atl: Up,
Balt: Up
Seat: Up
Fla: Up
VOLT/CUR: Atl OK
Sea OK
Bal OK
Fla Voltage dropping toward end OK now
BOX TEMPS: All not too hot drops in Sea and Bal due to opening
SONICS: Atl: OK
Sea: Two heater cycles, w seems too variable
Bal: OK
Fla: OK
PRES: OK
T: Consistent,OK
RH: Look OK , some variations between stations
4-component Rad: All OK except Fla SW out too high ~1800 - 2000 UTC
T/Gsoil: All OK, Atl still in slush/ice around -2C,
COMPASS: All appear reasonable, some variation between stations
MISCELLANEOUS: No known lead activity.
NOTE from Peter: I have not provided details that John did.
I will mainly concentrating on things
that cannot be known from looking at the data such as
lead activity, open box times, polar bear munchings etc.
Please let me know if you want more info included here.
- 420: EVE, Site 2, Fri 24-Apr-1998 17:53:29 AKDT,
4/24 17:30-19:00
Installed new Schroff backplane in Seattle's EVE. Had John already
done this? The backplane I removed was already a Schroff.
Also replaced the button battery even though old battery was still
above 3V.
Data transmission after reinstalling EVE at Seattle did not resume,
even though data was being stored on RAM and on the Flashdisk. Killed what
looked like a hung process on pampoll and issued "start" command under
entersys while talking to Seattle via RF (which continued to work fine even
though data was not being sent correctly to the ship). Data transmission
resumed.
No frost on any instruments.
- 421: EVE, Site 4, Fri 24-Apr-1998 17:59:17 AKDT,
4/24 19:00-20:00
Installed new Schroff backplane in Florida's EVE.
Also replaced the button battery even though old battery was still
above 3V.
No frost on any instruments.
- 422: EVE, Site 1, Fri 24-Apr-1998 18:00:32 AKDT,
4/24 21:45-22:00
Replaced Atlanta's EVE box with the spare EVE box, but still using
Atlanta's A/D board since the spare didn't have an A/D board.
John Militizer had already replaced the button battery in this spare
EVE.
No frost on any instruments.
Dug out a fair bit of blown in snow from the upwind side of the
sled box hole (in the snow).
1/28/99 Changed Site number from 4 to 1 - twh
- 423: Daily_Status, Site all, Fri 24-Apr-1998 21:58:33 AKDT, Daily_Status
From 4/23/98 14Z through 4/25/98 06z
(late report)
WEATHER: - Temps -15 to -23C
Today and yesterday were beautiful, zero clouds, light winds
LEADS: No open water observed
BASE: Pampoll Stopped working last night. Re-boot got it going.
ATL, SEA, BAL, FLA:
All ststions up and looking good, except some missng data from FLA that
will need to get from flashcard.
No heater cycles - not needed no frost
NOTE: See Jeff's reports on site visits
- 424: Daily_Status, Site all, Sat 25-Apr-1998 08:41:51 AKDT, Daily_Status
From 4/24/98 16Z through 4/20/98 16Z
WEATHER: Another beautiful day
Light winds, no clouds, good visibility
Temps -23 and rising
BASE: Up
STATIONS: Atl: Up,
Sea: Missing data last three hours - Jeff re-started
Bal: Up
Fla: Up
No w seen on ATL
Other data looks good Added wind generator, quick charge on battery
brining it right up within ~10 hours.
- 425: EVE, Site 2, Sat 25-Apr-1998 12:05:02 AKDT, Seattle change to config 54.
4/25 ~17:00gmt
Downloaded configuration 54 via RF to Seattle.
Prior to download, Seattle was reachable via RF, but was not storing
data on ram or flashcard. This problem had now happened twice since the
backplane swap.
After the download, data was still not being stored.
I went to Seattle and swapped the EVE box, keeping the A/D board
since we don't have a spare for that. Rocky had not been configured with
configuration 54, so when I loaded config, it went back to 52.
~20:00, I redownloaded configuration 54 via RF.
Data is being stored in ram and on flashcard.
- 426: EVE, Site 1, Sat 25-Apr-1998 12:13:39 AKDT, Atlanta change to config 54
4/25 ~17:15gmt
Downloaded configuration 54 via RF to Atlanta.
- 427: EVE, Site 3, Sat 25-Apr-1998 12:23:09 AKDT, Baltimore failed attempt to change to config 54
4/25 ~20:25gmt
Attempted download of configuration 54 via RF to Baltimore.
No packets appeared to arrive intact. Got message:
...
Retry 0: NAK on sector
Retry 0: Retry Count Exceeded
Please read the manual page BUGS chapter!
Will wait for next site visit to upgrade configuration.
- 428: Daily_Status, Site all, Sun 26-Apr-1998 08:39:54 AKDT, Daily_Status
From 4/25/98 16Z through 4/26/98 16Z
WEATHER: Another nice day, high clouds, good visibility
Temps -23 and rising
BASE: Up
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
All data looks clean and consistent, no apparent frost problems
- 429: EVE, Site 2, Mon 27-Apr-1998 08:05:54 AKDT, EVE box swap at Seattle.
4/25 ~18:00gmt
Swapped EVE boxes at Seattle due to problem with EVE not storing data
files on either ram or flashdisk.
- 430: Daily_Status, Site all, Mon 27-Apr-1998 08:31:53 AKDT, Daily_Status
From 4/25/98 16Z through 4/26/98 16Z
WEATHER: Overcast, winds 7 m/s, limited visibility
Temps -23 and rising
BASE: Up
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
All data looks clean and consistent, no apparent frost problems
- 431: Daily_Status, Site all, Tue 28-Apr-1998 08:20:02 AKDT, Daily_Status
From 4/27/98 16Z through 4/28/98 16Z
WEATHER: Thin Overcast, winds 7 m/s,
Temps -19
BASE: Up
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
LEADS: One near runway, otherwias quite.
All data looks clean and consistent, No major frost problems.
Atlanta had one sonic heating cycle.
- 432: Daily_Status, Site all, Wed 29-Apr-1998 08:38:32 AKDT, Daily_Status
From 4/28/98 16Z through 4/29/98 16Z
WEATHER: Overcast, winds 5 m/s,
Temps -19
BASE: Up
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
Voltges: OK except Seattle has strange noise, will check at
site visit tommorrow.
LEADS: One near runway, another new onw juat upwind of Atlanta
Data looks clean and consistent, No major frost problems.
- 434: Visit_Log, Site 1, Wed 29-Apr-1998 09:03:34 AKDT, Lead opened just upwind while er were there
Visited Atlanta 1800-1900 4/28/98 (All times GMT)
Changed propane and flash cards.
Dime size patch of frost on upward looking SW radiometer; cleaned.
Minor frost in T/RH intakes. No frost on sonics.
Calibration with Vaisalla "wand" place in T/RH intale tube.
Time: 1849
Tair (wand) = -21.4 C (PAM was reading -21.2 at about this time)
RH (wand) = 76%
Just after we got to the site, a lead formed upwind ~70 m from the
station. By the time we left at 1900, the lead had grown to 30 m
width. It was oriented NNE-SSW. There was some shear also, the
far (East) side has also moved about 30 m south. At 1900 the lead
was 50% open water (no grease) and the rest was grease ice with a
few pancakes piling up on the downwind side.
Another group was at the site at ~2000. They noted rime on the
radiometers and cleaned. They also cleaned them at ~2400.
There may still be icing problems due to moisture from lead.
An aircraft (Canadian Convair 580) reported the lead had grown
to 300 m during overflight at ~ 0100 29 April.
The effects of the lead are clearly seen in the RH and T trends,
which are enhanced at Atlanta compared to the other sites after
1800.
- 435: Daily_Status, Site all, Thu 30-Apr-1998 10:34:13 AKDT, Daily_Status
From 4/29/98 16Z through 4/30/98 16Z
WEATHER: Overcast, winds 5 m/s from W
Temps -18
BASE: Stopped at 1000 GMT. After re-start all lost data retreived.
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
Voltges: OK except Seattle still has strange noise, will check at
site visit today
LEADS: Atlanta lead refrozen to at least 10 cm.
Very small lead or crack this side of Seattle.
Data looks clean and consistent, A couple isolated spikes in
Fla data. Frost appears minimal.
- 439: Visit_Log, Site 2, Thu 30-Apr-1998 14:57:45 AKDT, Routine Maintainence
Jeff and Peter visted Seattle ~2120 - 2210 30 April 1998 GMT
Changed propane - one bottle empty one had 22 lbs left
Changed flash card
Replaced nozzle - old one looked quite clean.
(John`s cleaning of lines seems to have helped.
Calibration with Vaisalla wand:
Time = 2149 30 April (GMT)
Tdry (wand) = -17.8 Tdry1 (PAM) = -17.67 Tdry2 (PAM) = -17.78 C
RH (wand) = 70.1 RH(PAM) = 73.8
No icing on radiometers, T/RH intakes, sonics
Fans all operational
Radiometers level according to bubble level
Did not check orientation - no reason to suspect change.
Jeff put A/D board in different slot.
Apparently fixed noisy voltage reading, (Actual voltaqes have been fine)
We had to walk last 100 m due to small lead (1.5 m wide)
that formed yesterday. Lead was oriented roughly NW-SE.
The lead is where there was an old pressure ridge.
It is well-frozen grey ice. Closest location to Seattle is ~50 to the`
North.
- 440: Visit_Log, Site 1, Thu 30-Apr-1998 15:20:54 AKDT, Polar Bear damage
Jim Maslanik checked Atlanta on way to his experiment about 1900 GMT..
He noticed Polar Bear had knocked off TEG chimney.
He put it back on.
Must have happened in last 24 hours.
No other apparent damage.
Several bear sightings in last two days.
- 441: Visit_Log, Site 4, Thu 30-Apr-1998 15:26:29 AKDT, Minor frost on upward-looking SW 27,28 April
I have visited (and will continue to visit) Florida every day.
Normally, if everything is OK and no icing is visible I will not
make log entry. At ~2000 GMT on April 27 and April 28 there was
a small amount of frost on upward looking SW radiometer. Doubtful
if data was affected. Zero frost anywhere on other visits.
- 442: Daily_Status, Site all, Fri 01-May-1998 08:28:07 AKDT, Daily_Status
From 4/30/98 16Z through 5/1/98 16Z (previous log should be day later)
WEATHER: Clear, winds 5 m/s from S, increasing rapidly
Temps -19
BASE: Up
STATIONS: Atl: Up,
Sea: Up
Bal: Down since 0330 5/1 GMT
Fla: Up
VOLTAGES: OK except Seattle battery readout still showing dropouts that
are not real.
LEADS: Atlanta lead apparently re-opened.
COMPASS: Atlanta has some spikes.
SONICS: Atlanta had 5 heating cycles around 0000Z. Lead effect?
COMMENTS: Baltimore still visible from bridge. Suspect polar bear
damage. Will try to visit today.
- 443: Visit_Log, Site 3, Fri 01-May-1998 19:18:25 AKDT, Bad battery terminal connectio? Swapped electronics box.
Visited Baltimore ~2200 - 2300 1 May GMT
Problem: Baltimore not working.
No evidence of polar bear damage.
Jeff took off and reattached battery cable,
Baltimore started working.
Apparently this was the problem, but we're not sure.
Jeff also replaced electronics box with one from Florida and put
previous Baltimore box in Florida.
We also replaced both propane tanks and flashcard.
There was a very small patch of frost on top of upward looking
SW radiometer that was cleaned. Doubtful data was affected.
Fans workings, no frost in T/RH intakes.
Performed calibration check with "wand":.
Time: 2225 1 May GMT
T (wand) = -18.4 RH (wand) = 69.2 %
Tdry (PAM) = -18.16 C Tdry2 (PAM) = - 18.10 RH (PAM) = 73.51 %
- 444: Daily_Status, Site all, Sat 02-May-1998 15:24:55 AKDT, Daily_Status
From 5/1/98 16Z through 5/2/98 16Z
WEATHER: Variable cloudiness, winds 5 m/s from SSW
Temps around -19
BASE: Up
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
VOLTAGES: OK
LEADS: Atlanta lead frozen over. No new ones.
SONICS: Forgot to use modified Eve box for ATI and Baltimore and wrong
one in Florida after yesterday's swap. So no sonic data from
Florida and Baltimore since yesteday afternoon. Fixed later.
See site Visit_Logs
- 445: Visit_Log, Site 4, Sat 02-May-1998 15:32:05 AKDT, EVE modified for Gill sonics
~1800 2 May GMT
Jeff modified EVE box at Florida for Gill sonics.
Sonics now working. No frost or other problems at Florida for
last few days.
- 446: Visit_Log, Site 3, Sat 02-May-1998 15:35:13 AKDT, Modified EVE for ATI, grounded wind generator etc.
2100 - 2200 2 May GMT
Peter and Jeff visited Baltimore
Installed wind generator grounding wire.
Put in ocean ice approx 30 m SW of PAM sled. Marked with stakes.
Modified EVE box for ATI sonics.
Replaced dessicant in downward looking SW radiometer.
Adjusted voltage output on wind generator by turning pot
1/4 turn clockwise. Could not check due to light winds.
No frost or other problems seen.
- 447: Daily_Status, Site all, Sun 03-May-1998 08:38:53 AKDT, Daily_Status
From 5/2/98 16Z through 5/3/98 16Z
CURRENT WEATHER: Overcast, winds 2 m/s from W
Temp -19 C
BASE: Up
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
VOLTAGES: OK
LEADS: Atlanta lead working a little. Very little if any open water.
COMMENTS: All data clean and consistent. No sonic heating cycles.
Looking good!
- 448: Visit_Log, Site 4, Sun 03-May-1998 19:22:21 AKDT, Shot boom angles, not polar bear
FLorida has been visted at least once every day since last Visit_Log
Zero icing/frost observed on radiometers, T/RH intakes, sonics each day
Shot boom angles 1800 4 May GMT
ALL DIRECTIONS MAGNETIC NO DECLINATION CORRECTION APPLIED
(Using Ed Andreas' compass)
Direction pointing to
Radiometer boom: 154 deg
Sonics: 342 deg
T/RH: 72 deg
Checked top of sonic "N" pointing same direction as boom within
eyeball tolerance.
- 449: Daily_Status, Site all, Mon 04-May-1998 08:51:20 AKDT, Daily_Status
From 5/3/98 16Z through 5/4/98 16Z
CURRENT WEATHER: Overcast, winds 5 m/s from S
Temp -18 C
BASE: Up
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
VOLTAGES: Seattle Battery voltage measurement dropping out.
We are certain actual voltage is OK
LEADS: Some new leads reported. Will proved details later.
COMMENTS: All data clean and consistent. No sonic heating cycles.
Looking good again!
- 450: Daily_Status, Site all, Fri 08-May-1998 08:50:04 AKDT, Daily_Status
5/8/98 1645 GMT
NOTE: This is first daily log since SHEBOP failed.
These comments are based on instantaneous checks using
"eve_console" around the time above.
CURRENT WEATHER: Overcast, winds 4 m/s from SSW
Temp -17 C
BASE: Up
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
VOLTAGES: OK
DATA: All looks OK except Seattle sonics u component not working.
Will check today.
LEADS: Lead opened between Atlanta and Floride on May 4. It has closed now.
- 451: Visit_Log, Site 1, Fri 08-May-1998 13:52:02 AKDT, Installed ground wire at Atlanta.
5/7 AKDT
Visited Atlanta to install ground wire.
Bear had toppled exhaust stack again. Reassembled it.
No frost on instruments.
Checked 4 component levels. Made minor adjustment.
Rebooted until I could reach the flashcard, then copied ram data files
to the flashdisk. Then swapped the flashdisk with a new empty one.
Installed ground wire with one end attached to the wind generator post.
Drilled 2m deep hole in ice about 80' to the west. Hit overflow slush, but
did not penetrate through ice to sea water. Drilled another hole through
refrozen 1' lead that had opened/closed about 2 months ago. This hole is
about 40' west of the sled box. Dropped stripped end of cable through to
sea water.
Small pockets of open water on large active lead few hundred feet
east of Atlanta.
- 452: Visit_Log, Site 2, Fri 08-May-1998 14:01:09 AKDT, Site visits to Seattle and Florida
5/8 AKDT
Multiple visits to Florida and Seattle.
First problem was that the U channel on Seattle's sonic was showing
-99's on eve_console. Immediate problem proved to be that the sonic was
frosted up with up to 1/2" of feathery frost. The U channel returned when
the frost was removed.
We used the HEATON command with the TRH and could hear the TRH fan
slow down, so the sonic heaters are capable of heating still, but must not
be getting the heat commands from pampoll. In looking at the output from
show_heater, it appears that the sensed battery voltage was too low for
sonic_heater to turn the sonic heaters on.
Made slight adjustments to Florida's and Seattle's 4-component levels.
All 4 PAM site 4-components have now been recently leveled with a bubble level.
The second problem I tried to diagnose was the bad sensing of the
battery voltage at Seattle. Swapping Seattle's and Florida's analog cables
from the battery box to the EVE box made no difference. Swapping their
battery boxes made no difference. It's still too early to say (the problem is
sporadic) but swapping the EVE analog boards may have fixed the sensing of
Seattle's battery voltage without having the problem show up at Florida. But
Seattle's sensed TEG voltage now jumps around from 14 to 17V. Not sure if it
was that way before.
- 453: Daily_Status, Site all, Sat 09-May-1998 08:45:33 AKDT, Daily_Status
5/9/98 0000 - 1640 GMT
NOTE: This is first daily log since SHEBOP failed.
These comments are based on looking at printed data
using show_met, show_sonic, show_rad, show_heater, show_misc
CURRENT WEATHER: Overcast, moderate snow, winds 5 m/s from NE
Temp -18 C
BASE: pampoll up, SHEBOP down
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
VOLTAGES: OK
DATA: All looks OK
LEADS: Unknown. No new activity reported.
- 454: Daily_Status, Site all, Sun 10-May-1998 08:57:51 AKDT, Daily_Status
5/10/98 0000 - 1640 GMT
NOTE: This is first daily log since SHEBOP failed.
These comments are based on looking at printed data
using show_met, show_sonic, show_rad, show_heater, show_misc
show_status
CURRENT WEATHER: Overcast, blowingsnow, winds 8 m/s from NE
Temp -11 C
BASE: pampoll up, SHEBOP down
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
VOLTAGES: OK
DATA: All looks OK
LEADS: No new activity. Expect something to happen with these high winds.
- 455: Visit_Log, Site 4, Sun 10-May-1998 09:06:31 AKDT, Small frost patch on SW radiometer
Time of visit: 2100 8 May 1998
On Daily check of Florida observed nickel-size patch of frost on
upward looking SW radiometer. A little in T/RH intake. Cleaned both.
Frost was severe this day due to fog. It was much worse on main
tower and main radiometer system near tower so this PAM site did
quite well considering the conditions.
- 456: Visit_Log, Site 4, Sun 10-May-1998 09:12:49 AKDT, Earlier routine visit
Time of Visit: 2200 - 2230 6 May GMT
This was an earlier visit that was not logged due to the death of
SHEBOP. Visited by Peter and Jumper.
Propane tanks replaced. They had run out a few hours earlier.
Replaced gas nozzle. Same flashcard kept
in place. Seems some data from previous ~8 hours not stored on
flashcard, perhaps due to lack of power. Had to re-start and re-seat
flashcard to get it to store data again.
No frost observed.
Very slight adjustment made to radiation level.
Checked T/RH calibration with Vaisalla wand placed inside intake tube.
Time of calibration: 2218 6 May GMT
Tair (wand) -16.3 C
RH (wand) 66.2 %
(Forgot to write down coreesponding PAM values; can be obtained from
downloaded flashcard data.)
- 457: Daily_Status, Site all, Mon 11-May-1998 18:33:26 AKDT, Daily_Status
5/10/98 1600 - 5/11/98 GMT
NOTE: SHEBOP is up! Hat's off to Jeff and Gordon for the speedy repair
CURRENT WEATHER: Light overcast, winds 4 m/s from NE
Temp -9 C
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
VOLTAGES: OK Seattle Battery noisy
DATA: All looks OK
LEADS: No new activity. Expect something to happen with these high winds.
This log was done late. Baltimore communication failed todsy. Will
try to visit tommorrow.
- 458: Daily_Status, Site all, Tue 12-May-1998 08:32:01 AKDT, Daily_Status
5/11/98 1600 - 5/12/98 GMT
CURRENT WEATHER: Overcast, winds 4 m/s from SW
Temp -9 C
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up,
Sea: Up
Bal: Down
Fla: Up
VOLTAGES: OK
DATA: Atl Sea FLa OK
LEADS: New lead opened parallel to port side of ship about 1 km away.`
Goes about 40 West of Seattle but only about 2-3 m wide there.
- 461: Visit_Log, Site 4, Tue 12-May-1998 08:35:43 AKDT, Changed T/RH probe at Florida to test spare
Time about 2230 11 May GMT
Peter replaced T/RH assembly #005 with #007.
No problems before, just checking spare. Worked OK.
- 462: Visit_Log, Site 3, Tue 12-May-1998 19:32:26 AKDT, First helo visit to a PAM site- Baltimore.
5/12 ~21:30
Got helo ride to Baltimore to fix it. It stopped transmitting data a
couple of days ago.
No LED's were lit on the EVE computer. No voltage was getting to the
EVE box. Found and replaced bad 15A fuse in battery box. The fuse did not
look black and blown. Could it have had an intermittent connection in it, and
have caused the two earlier blackouts?
No frost on any instruments. Actually, there was an icicle on the
lower part of one of the black, radiometer boom legs.
View from on high was incredible. There are good sized leads all
around the region. There's a continuous strip of ice connecting Baltimore to
the ship, but there are N-S leads on either side of the strip. One lead goes
from just barely west of the runway off the port side of the ship, to about
300m west of the Baltimore site. Near the Baltimore site, this lead is about
30m wide.
The ice pack south of Baltimore is riddled with leads, starting
perhaps 700m south of Baltimore.
Many of the visible leads had open water over more than 50% of their
surfaces. Some had ice growing towards the middle from both sides.
The helicopter pilot said there were many more leads, and much more
open water than there was one day earlier.
The sky seemed full of lead smoke and water sky bands over the various
leads.
There was about 5" of new snow in the Baltimore area, that I sunk into
with each step.
- 463: Daily_Status, Site all, Wed 13-May-1998 08:52:27 AKDT, Daily_Status
5/12/98 1600 - 5/13/98 1600 GMT
CURRENT WEATHER: Overcast, calm, temperature -6 C
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up,
Sea: Up
Bal: Went down 1000 GMT, out of propane?
Fla: Up
VOLTAGES: OK, except Baltimore dropped before going down
DATA: Atl Sea FLa
LEADS:
- 464: Daily_Status, Site all, Thu 14-May-1998 09:14:09 AKDT, Daily_Status
5/12/98 1600 - 5/13/98 1600 GMT
CURRENT WEATHER: Overcast, windy, pressure continues rising,
temperature -9.3 C at 6:45 a.m. local
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
VOLTAGES: OK, except Baltimore failed yesterday and Jeff jury rigged it. So
Baltimore voltages show done but station is running.
DATA: Atl Sea Balt Fla OK
LEADS: A narrow lead just 80 meters from the station prevented us from servicing Seattle yesterday evening. No other activity in the immediate vicinity of the camp, but on the flight in on May 12 we crossed mile and miles of leads to the south.
- 465: Daily_Status, Site all, Sat 16-May-1998 08:16:30 AKDT, Daily_Status
5/13/98 1600 - 5/14/98 1600 GMT
CURRENT WEATHER: (Morning of May 15) Overcast, windy, pressure continues
rising, temperature -9.3 C at 7 a.m. local
BASE: pampoll up but shaky, SHEBOP up
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
SONICS: The w component on Florida and Baltimore is not averaing zero. Is
this a leveling problem or a caibration problem?
VOLTAGES: OK, except Baltimore failed and Jeff jury rigged it
by bypassing the battery. So Baltimore voltages show down
but station is running.
DATA: Atl Sea Balt Fla OK
LEADS: No new leads, but lead east of Seattle (really, just a crack)
continues to be active.
- 466: Daily_Status, Site all, Sat 16-May-1998 08:27:29 AKDT, Daily_Status
5/15/98 1600 - 5/16/98 1600 GMT
CURRENT WEATHER: Windy (from the east), thin clouds,
temperature -6.5 C at 7:35 a.m. local. Drifting snow last
evening.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up,
Sea: Up
Bal: Up
Fla: Up
SONICS: All OK, though w's at Baltimore and Florida continue to show averages
that are not zero. I checked the alignment of the sonic at
Baltimore yesterday, and it was level to my eye.
RADIOMETERS: Frost-free at Baltimore and Seattle yesterday and surely
everywhere else.
VOLTAGES: OK, especially Baltimore, where we substituted the new battery box
and adjusted the output of the wind generator yesterday.
DATA: Atl, Sea, Balt, Fla OK
LEADS: No new leads in the immediate vicinity. The lead that was open near
Baltimore on Wednesday is mostly closed. The cracks east of
Seattle are still active. Dan and I crossed them on foot
last evening to resupply the station with propane. Notice,
these cracks are east of Seattle and the winds have been
easterly.
UPDATED SITE CONDITIONS:
At Baltimore yesterday, I remeasured some of the station variables
that I measured when we installed the station in October.
Snow depth: 50 cm (compared to about 5 cm in Oct)
Ice thickness: 1.4 m (compared to about 0.4 m in Oct)
Height of sonic w: 2.34 m
Height of T/RH intake: 1.43 m
Head-on direction for sonic: 61 degrees true (assumes 21 deg east
declination)
2.8 miles by snowmobile from the ship
COMMENTS: With about 45 cm more snow at Baltimore and with the ATI sonic
there rather than the Gill, the sonic anemometer is now about 1 meter
nearer the surface than it was in the fall. With a 15-cm path on that
sonic, a height of 2.34 m is probably not enough to get all the
momentum and sensible heat flux by covariance techniques. The rule of
thumb I use is that the instrument height must be 20 time the path
length.
- 467: Daily_Status, Site all, Sun 17-May-1998 08:20:40 AKDT, Daily_Status
5/16/98 1600 - 5/17/98 1600 GMT
CURRENT WEATHER: Windy (from the east), thin clouds,
temperature -7.5 C at 7:54 a.m. local time,
pressure continues to rise, 1018.2 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
SONICS: All OK.
TSOIL: Erratic behavior of Tsoil at Atlanta. It's much more variable than
at the other sites.
T/RH: Erratic behavior of relative humidity sensor at Baltimore. Values
vary from 50 to 96%, while all the other sensors hover around 90%.
VOLTAGES: OK
DATA: Atl, Sea, Fla OK. Data interruption at Baltimore at about
1200 GMT on the 17th, reason unknown to this reporter
LEADS: No new leads in the immediate vicinity.
UPDATED SITE CONDITIONS:
At Seattle, I documented some of the station variables.
This site is surrounded by newly broken ice but, according to the
ice guys, is on a multiyear floe 2-2.5 m thick.
Snow depth: 19 cm (which seems thin if the floe is multiyear)
Height of sonic w: 2.87 m
Height of T/RH intake: 1.81 m
Head-on direction for sonic: 4 degrees true (assumes 22 deg east
declination)
1 mile by snowmobile from the ship
- 469: TRH, Site 3, Sun 17-May-1998 23:44:49 AKDT, Balt. TRH
As Ed wrote earlier the TRH is acting up. The new TRH is in the lab and I will replace on the next visit to Baltimore.
Dave
- 470: Visit_Log, Site 2, Sun 17-May-1998 23:47:41 AKDT, New Propane at Sea.
I changed the propane and TEG nozzle at Sea. Everything else there looked good.
Dave
- 471: Visit_Log, Site 4, Sun 17-May-1998 23:57:55 AKDT, New Progane at Fla
I changed the propane and TEG nozzle. The nozzle looked clean but I replaced it any way. After I opened the valve to the TEG the spark kicked in and didn`t stop. That's ok but after it got warm it still stayed on. So maybe I didn`t wait long enough. Then I did the flash card. Power off, switch card, power on , not to quick mind you, this is electronics. I waited about 12 sec watched the 12+ led come on, good. Then I looked at the flash card light, it was on steady, bad.? I didn't have Rocky or an extra flash card on me.
... back on the ship ....
I usually check that things are running from iplot(:-) when I get back to the ship. It looked like the RF link was broken at Fla. poop. I could get to the other sites.
.... it was/is getting late so I decided to make a quick dash before bed to check for something obvious. Many hours later at Fla. the spark is still sparking. The pressure is at 10.2 lbs. I pulled some of the spade plugs and can verify that my burnt flesh smells bad and I my gloves do not make good insulators. But this should confirm that the TEG is hot and we have enough pressure. The spark should be off. I did find the RF antenna cable was loose, I tighened it and felt good.
.... back on the ship
I went to run eve_console on pampoll. All locked up. Hard reboot. Then I started eve_console and I couln't get to Fla. errr. I was able to talk to ALL the other sites. Tomorrow I will bring Rocky and swap out another flash card.
Dave
- 472: Daily_Status, Site all, Mon 18-May-1998 08:45:35 AKDT, Daily_Status
5/17/98 1600 - 5/18/98 1600 GMT
CURRENT WEATHER: Moderate winds (from the east), cloudy,
temperature -7.0 C at 7:45 a.m. local time,
pressure high, 1024.8 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Down after a propane change last evening.
SONICS: All OK. Cleared light rime from Florida yesterday morning (about
1800 GMT), but the transducer faces were clear. Wind and sun likely
cleared other sites naturally, since the higher reaches of our main
met tower became frost-free as the day progressed.
RADIOMETERS: Also cleared light rime from up-looking pyranometer at Florida
yesterday morning. Radiometers agreed that at midday yesterday,
solar flux was over 500 watts per square meter
TSOIL: Erratic behavior of Tsoil at Atlanta. It's much more variable than
at the other sites. Perhaps water is infiltrating the ice-snow
interface.
T/RH: Erratic behavior of relative humidity sensor continues at Baltimore.
Values vary from 50 to 96%, while all the other sensors hover around
90%.
VOLTAGES: OK, except at Florida.
DATA: Atl, Sea, Balt OK. Florida not transmitting; unknown whether it's
collecting.
LEADS: No new leads in the immediate vicinity.
UPDATED SITE CONDITIONS:
At Florida I documented some of the station variables.
This is a picturesque site on multiyear ice that is reported to be
roughly 2.5 m thick. There is broken (i.e., rough) ice to the west
and north and fairly smooth ice to the east; the camp starts 100 m to
the south but has a fairly low profile now.
Snow depth: 32 cm
Height of sonic w: 3.42 m (Gill sonic)
Height of T/RH intake: 1.88 m
Head-on direction for sonic: 7 degrees true (assumes 22 deg east
declination)
1/2 mile by snowmobile from the ship
- 473: Daily_Status, Site all, Tue 19-May-1998 08:15:06 AKDT, Daily_Status
5/18/98 1600 - 5/19/98 1600 GMT
CURRENT WEATHER: Moderate winds (from the east), thin clouds,
temperature -8.7 C at 8:02 a.m. local time,
pressure high, 1032.2 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up.
SONICS: All OK.
T/RH: Erratic behavior of relative humidity sensor continues at Baltimore.
Values vary from 50 to 96%, while all the other sensors hover around
90%.
VOLTAGES: OK, except Florida has been decreasing. Is now at 12.5 volts.
DATA: Atl, Fla, Sea, Balt OK.
LEADS: No new leads in the immediate vicinity.
- 474: Visit_Log, Site 4, Tue 19-May-1998 13:20:52 AKDT, New Flash Card at Fla
May 18, I went to investigate the problem at Fla. I plugged Rocky in and could not connect to eve. I then powered down and changed the flash card, powered up and the flash card light looked better. Rocky connected and ops looked OK. The sensors looked clean.
The TEG was still sparking.??
Things looked good from the ship (pampoll), too.
Dave
- 475: Visit_Log, Site 2, Tue 19-May-1998 13:28:30 AKDT, Quick visit to Sea.
I was in the area ( at Fla.) and went to check for rime and problems at Sea. Things looked clean and the right things were making the right noises.
Dave.
- 476: Base_Software, Site base, Tue 19-May-1998 13:33:04 AKDT, pollup script mods.
I removed the -S option from the pollup script on pampoll. I will FTP
/var/log/pam.log to Gordon.
FYI -> before I did the mods ~1300 Alaskan I found pampoll in the suspend mode. I had to hit the reboot/power button twice. I held it for one sec then release. The first time it cleared the suspend icon ( still locked up, though ), then once more to reboot it.
Dave
- 477: Base_Software, Site base, Tue 19-May-1998 13:44:48 AKDT, reset time on pampoll
I reset the time on pampoll with the date command. It was slow about ten mins.
Dave
- 478: Daily_Status, Site all, Wed 20-May-1998 08:12:04 AKDT, Daily_Status
5/19/98 1600 - 5/20/98 1600 GMT
CURRENT WEATHER: Light winds, thin clouds, temperature -11.6 C at 7:55 a.m.
local time, pressure still rising, 1036.6 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up.
SONICS: All OK.
RADIOMETERS: Cleaned light frost off up-looking short-wave radiometer at
Florida, also at main-camp instrument. So other sites likely also
had frost early that cleared naturally in the sun.
T/RH: Still errratic low-humidity spikes of duration, typically, one hour
at Baltimore
VOLTAGES: OK
DATA: Atl, Fla, Sea, Balt OK.
LEADS: No new leads in the immediate vicinity.
- 479: Daily_Status, Site all, Thu 21-May-1998 08:36:43 AKDT, Daily_Status
5/20/98 1600 - 5/21/98 1600 GMT
CURRENT WEATHER: Light winds; thick fog in last 10 hours;
temperature -10.7 C at 7:25 a.m. local time;
pressure high, 1035.7 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up.
SONICS: Spotty in last 10 hours, presumably riming.
RADIOMETERS: No frost at Florida yesterday morning, though in-camp, up-looking
pryanometer was lightly frosted.
VOLTAGES: OK
DATA: Atl, Fla, Sea, Balt OK.
LEADS: No new leads in the immediate vicinity. But the crack enroute to
Seattle remains active. Couldn't reach Seattle yesterday because the
floes had come back together and depressed the trail below sea level;
it was flooded.
- 480: Visit_Log, Site all, Fri 22-May-1998 08:34:19 AKDT,
5/21/98 between 1800 and 2300
Vistited Florida, Seattle, and Atlanta to check radiometers and
sonics for rime, since riming had been moderate overnight at main tower.
Found no riming of the PAM radiometers.
All the sonics were rimed, but only Florida seemed to be degraded by
that riming. Cleared rime from all the sonics.
- 481: Daily_Status, Site all, Fri 22-May-1998 08:42:52 AKDT, Daily_Status
5/21/98 1600 - 5/22/98 1600 GMT
CURRENT WEATHER: Light winds; a few high, thin clouds;
temperature -8.5 C at 7:52 a.m. local time;
pressure high, 1032.8 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
SONICS: All OK. Some riming up to 2000 on May 21. Cleared this from
Florida, Seattle, and Atlanta. Data missing from Atl and Sea for
1600-1900 on the 21st because heaters there do not seem to be working.
RADIOMETERS: No rime on Florida, Atlanta, and Seattle radiometers.
T/RH: The erratic behavior of the relative humidity sensor at Baltimore
seems to be diurnal. For the few hours around solar noon, we see
humidity periodically falling to about 50%, while it behaves
well at other times.
VOLTAGES: OK
DATA: All OK
LEADS: No new leads in the immediate vicinity.
UPDATED SITE CONDITIONS:
Here are updated site variables for Atlanta.
This site is on multiyear ice. There are many new ridges to the
north and northeast, starting within 100 m of station. The ice is
fairly smooth in the other directions.
Snow depth: 30 cm
Height of sonic w: 2.22 m
Height of T/RH intake: 1.27 m
Head-on direction for sonic: 86 degrees true (assumes 22 deg east
declination)
1 1/4 mile by snowmobile from the ship
- 482: Daily_Status, Site all, Sat 23-May-1998 08:22:13 AKDT, Daily_Status
5/22/98 1600 - 5/23/98 1600 GMT
CURRENT WEATHER: Light winds; clear skies;
temperature -10.2 C at 7:30 a.m. local time;
pressure high, 1032.1 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
SONICS: All OK.
RADIOMETERS: No rime on Florida on the morning of the 22nd (about 1800 GMT)
although light rime on the main-camp instruments. For the last few
days, all the pyranometers have been consistently showing an incoming
shortwave flux around solar noon in excess of 600 W/m**2. Really!
The snow was wet enough late yesterday that I could make a good
snowball.
T/RH: Still erratic behavior of the relative humidity sensor at Baltimore,
although not as prevalent in the last 24 hours.
VOLTAGES: OK
DATA: Atl, Sea, Fla OK. Some weird glitches in the data from Baltimore between
1600 and 2000 GMT on the 22nd. Will investigate further.
LEADS: No new leads in the immediate vicinity.
- 483: Daily_Status, Site all, Sun 24-May-1998 08:25:53 AKDT, Daily_Status
5/23/98 1600 - 5/24/98 1600 GMT
CURRENT WEATHER: Moderate winds; clear skies;
temperature -9.2 C at 7:44 a.m. local time;
pressure high, 1031.8 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
SONICS: All OK.
RADIOMETERS: No rime on Florida on the morning of the 23nd (about 1800 GMT)
although light rime on the main-camp instruments.
T/RH: Still erratic behavior of the relative humidity sensor at Baltimore
around solar noon.
VOLTAGES: OK
DATA: Atl, Balt, Sea, Fla all OK.
LEADS: No new leads in the immediate vicinity.
- 484: Daily_Status, Site all, Mon 25-May-1998 08:21:40 AKDT, Daily_Status
5/24/98 1600 - 5/25/98 1600 GMT
CURRENT WEATHER: Moderate winds; clear skies;
temperature -7.6 C at 7:50 a.m. local time;
pressure high, 1030.1 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
SONICS: All OK.
RADIOMETERS: No riming overnight on the 24th.
T/RH: Still erratic behavior of the relative humidity sensor at Baltimore
around solar noon.
VOLTAGES: OK
DATA: Atl, Balt, Sea, Fla all OK.
LEADS: No new leads in the immediate vicinity.
- 485: Visit_Log, Site 3, Mon 25-May-1998 22:41:04 AKDT, New TRH/Propane at Bal.
Installed the spair TRH and changed the propane tanks. The compass reading on
the sonic boom was 68 degrees TRUE and the digital compass was reading 336.09
(w/decl). This should be 90 but it's ~91.91 degrees. Is this within your
tolerances? The instruments looked in good shape and the flash card was swappedout, then I checked eve with Rocky. No leads insight of the site. We remarkedthe "new" trail with the "old" markers from what was left of the old trail.
Your amigo,
David M. Costa
note: I did NOT replace the TEG nozzle.
- 486: Daily_Status, Site all, Tue 26-May-1998 08:13:32 AKDT, Daily_Status
5/25/98 1600 - 5/26/98 1600 GMT
CURRENT WEATHER: Moderate winds; clear skies;
temperature -6.2 C at 7:45 a.m. local time;
pressure 1023.6 mb. (We did have an episode of clouds
yesterday between about 1930 GMT on the 25th and 0600 on the
26th, the first significant clouds in, maybe, five days.)
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
SONICS: All OK.
RADIOMETERS: OK
T/RH: Swapped T/RH and compass at Baltimore. Relative humidity now seems
OK, and we did not goof up the temperatures or compass in the switch.
All the stations reported temperatures above 0 deg C for an hour or so
yesterday afternoon (roughly 2300 GMT on the 25 to 0000 on the 26th).
VOLTAGES: OK
DATA: Atl, Balt, Sea, Fla all OK.
LEADS: No new leads in the immediate vicinity. And the 2.8-mile snowmobile
trail to Baltimore was surprisingly intact.
- 487: Visit_Log, Site 1, Tue 26-May-1998 16:32:22 AKDT, New Propane at Atl.
Changed the propane tanks, flash card and did not change the TEG nozzle. The
instruments looked clean and seemed to be working well.
Tdry1 = -2.57 Tdry2=-2.95 RH= 79.83
Batt Voltage = 14.4
TEG = 19.19 but the meter in the box was almost straight up ( I think ~14.5 v)
Load= 2.120 A
charging 3.139 A What can the battery handle?
The wind generator was on about 98% of the time I was there. ( 45 minutes )
U=5.28, V=0.53, W=0.06
compass = 360.61 w/decl
sonic boom = 91 degrees w/decl
Now for one little problem. When I got back to the ship I looked at the flash
card on Rocky. The last day written was on May 15 (Metppf.135), it should have
been today May 26 (JD 146). hummm... The card was last switched on May 13
(Metppf.133) so there was files for the rest of the 13th all of the 14th (~40KB)
and about ~30KB of a day for the 15th. I created a small text file on Rocky and
saved it to D: ( flash card ) and it seemed to work fine. I reformatted the
card using MS Windoz. Does it need to be initialized with some kind of PAM
file??
The lead just east of the site is still active.
Later
I. C. Snow
- 488: Daily_Status, Site all, Wed 27-May-1998 08:17:05 AKDT, Daily_Status
5/26/98 1600 - 5/27/98 1600 GMT
CURRENT WEATHER: Moderate winds; overcast with recent freezing rain;
temperature -3.8 deg C; the bottom has fallen out of the
pressure, 1007.4 mb
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
SONICS: All OK. Heaters on in last 4 hours at Sea and Balt; not at
Atl or Fla.
RADIOMETERS: OK
T/RH: T/RH at Baltimore now agrees with other stations and shows none of
the dropouts. We considered the exposure problem there, but the only
real difference is the height above the snow. It`s closer than at
Seattle and Florida but not as close as Atlanta's T/RH.
VOLTAGES: OK. Box temperature at Florida about 5 deg C.
DATA: Atl, Balt, Sea, Fla all OK.
LEADS: No new leads in the immediate vicinity, but the lead 100 m north of
Atlanta is still somewhat active. We visited Atlanta yesterday and
saw ridging of the new ice in the lead and some water (or newly
frozen ice) standing on the surface. From the bridge this morning,
I could see open water around the border of the floe, about 1-2 miles
away, to the west, north, and east.
- 489: Visit_Log, Site 2, Wed 27-May-1998 23:14:51 AKDT, Cleaning Sea. / freezing rain
Quick visit to Sea. because we had some freezing rain and Fla. needed to be
cleaned. Both upward looking radiometers had some melting ice on the domes.
There was some water droplets on the sonic heads. We shot the sonic boom at
113.5 (I think he means 13.5 deg true, ELA). Some of the plywood near the sled and all the PVC pipe was exposed. The
snow was very soft and packs well. There was some cracks about 150 m south of
the station. Today was the first recorded positive temp. 0.3C
Hugs
Davey
- 490: Daily_Status, Site all, Thu 28-May-1998 08:35:18 AKDT, Daily_Status
5/27/98 1600 - 5/28/98 1600 GMT
CURRENT WEATHER: Light winds; overcast; temperature -1.7 deg C at 7:14 am;
pressure, 1011.3 mb
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
SONICS: All OK.
RADIOMETERS: OK
T/RH: OK. Another episode of above 0 temperatures yesterday afternoon.
TSOIL: Seattle showing temperature at snow-ice interface above 0 for last
24 hours, maxing out at over +4 deg C. (Impossible, of course.)
VOLTAGES: OK.
DATA: Atl, Balt, Sea, Fla all OK.
LEADS: No new leads in the immediate vicinity, but the region around Seattle
is still active. We crossed a couple new cracks yesterday, inches
wide. From the bridge this morning, I could still see open water
around the border of the floe, about 1-2 miles away, to the west, north,
and east.
- 491: Daily_Status, Site all, Fri 29-May-1998 08:21:44 AKDT, Daily_Status
5/28/98 1600 - 5/29/98 1600 GMT
CURRENT WEATHER: Light winds; overcast; drizzle;
temperature +0.2 deg C at 8:00 am; pressure, 1003.8 mb. Serious
melting, the snow is slushy.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
SONICS: All OK. Episodes of heating at all but Florida; but Florida didn`t
seem to need heating
RADIOMETERS: OK. Water on the up-looking domes much of the last 24 hours.
The ice guys cleaned Baltimore at 1914 GMT; Dave cleaned Florida at
roughly the same time.
T/RH: OK. Temperatures hovering around zero the last 24 hours.
VOLTAGES: OK.
DATA: Atl, Balt, Sea, Fla all OK.
CURIOSITIES: Spikes in several of the Baltimore signals at about 0400 GMT on
the 28th.
LEADS: No new leads in the immediate vicinity.
- 492: Visit_Log, Site 2, Fri 29-May-1998 13:07:47 AKDT, New propane at Sea
New fuel at Sea. The equipment looked good. It sounded like the spark was
still sparking. There are still cracks about 150 m to the south. The site
seemed to have moved relative to other equpment in the area and the ship so we
had the bridge give us a range and bearing ( from the bridge )
RANGE -> 820 meters
BEARING-> 003 degrees
Tdry 0.33 C
Tdry2 0.28 C
RH 100.6 %
digi commpass 279.70 ( w/decl )
boom 13 degrees
flash 14 days ( correct )
Things are getting slushy and wet. It was drizzling with light winds at the
site. Ed found a Swiss Army pocket knife under the radiometers. ~1130 Alaskan If the data jumped around this time, this is why. And who's the lucky one to
get their knife back?
I.B. Wet
- 493: Base_Software, Site base, Fri 29-May-1998 21:51:53 AKDT, Level 0 backup on SHEBOP
The output from level 0 backup on SHEBOP. Dave
# ./backup.lev0
Start: Fri May 29 20:09:44 AKDT 1998
Dumping /
DUMP: Writing 63 Kilobyte records
DUMP: Date of this level 0 dump: Fri May 29 20:09:46 1998
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/rdsk/c0t3d0s0 (shebop:/) to /dev/rmt/0mn.
DUMP: Mapping (Pass I) [regular files]
DUMP: Mapping (Pass II) [directories]
DUMP: Estimated 244714 blocks (119.49MB) on 0.03 tapes.
DUMP: Dumping (Pass III) [directories]
DUMP: Dumping (Pass IV) [regular files]
DUMP: 244690 blocks (119.48MB) on 1 volume at 429 KB/sec
DUMP: DUMP IS DONE
DUMP: Level 0 dump on Fri May 29 20:09:46 1998
Dumping /usr
DUMP: Writing 63 Kilobyte records
DUMP: Date of this level 0 dump: Fri May 29 20:14:47 1998
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/rdsk/c0t3d0s6 (shebop:/usr) to /dev/rmt/0mn.
DUMP: Mapping (Pass I) [regular files]
DUMP: Mapping (Pass II) [directories]
DUMP: Estimated 380830 blocks (185.95MB) on 0.05 tapes.
DUMP: Dumping (Pass III) [directories]
DUMP: Dumping (Pass IV) [regular files]
DUMP: 380770 blocks (185.92MB) on 1 volume at 473 KB/sec
DUMP: DUMP IS DONE
DUMP: Level 0 dump on Fri May 29 20:14:47 1998
Dumping /home
DUMP: Writing 63 Kilobyte records
DUMP: Date of this level 0 dump: Fri May 29 20:21:48 1998
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/rdsk/c0t3d0s7 (shebop:/home) to /dev/rmt/0mn.
DUMP: Mapping (Pass I) [regular files]
DUMP: Mapping (Pass II) [directories]
DUMP: Estimated 848282 blocks (414.20MB) on 0.10 tapes.
DUMP: Dumping (Pass III) [directories]
DUMP: Dumping (Pass IV) [regular files]
DUMP: 70.35% done, finished in 0:04
DUMP: 848230 blocks (414.17MB) on 1 volume at 475 KB/sec
DUMP: DUMP IS DONE
DUMP: Level 0 dump on Fri May 29 20:21:48 1998
Dumping /data
DUMP: Writing 63 Kilobyte records
DUMP: Date of this level 0 dump: Fri May 29 20:37:01 1998
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/rdsk/c0t0d0s3 (shebop:/data) to /dev/rmt/0mn.
DUMP: Mapping (Pass I) [regular files]
DUMP: Mapping (Pass II) [directories]
DUMP: Estimated 654474 blocks (319.57MB) on 0.08 tapes.
DUMP: Dumping (Pass III) [directories]
DUMP: Dumping (Pass IV) [regular files]
DUMP: 91.16% done, finished in 0:00
DUMP: 654442 blocks (319.55MB) on 1 volume at 485 KB/sec
DUMP: DUMP IS DONE
DUMP: Level 0 dump on Fri May 29 20:37:01 1998
Exabyte EXB-8500 8mm tape drive:
sense key(0x0)= No Additional Sense residual= 0 retries= 0
file no= 4 block no= 0
Taking tape offline
Finished: Fri May 29 20:49:55 AKDT 1998
- 494: Daily_Status, Site all, Sat 30-May-1998 08:56:53 AKDT, Daily_Status
5/29/98 1600 - 5/30/98 1600 GMT
CURRENT WEATHER: Moderate winds; overcast; snow flurries now but occasional
drizzle last 24 hours; temperature -1.1 deg C at 7.55 am;
pressure 1012.1 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
DATA: No data from any station after 0200-0300 GMT on the 29th.
Dave is checking
SONICS: Only Florida reporting fairly continuously before the data stopped.
Others were heating, evidently because of water on the sensors.
RADIOMETERS: OK. Water on the up-looking domes much of the last 24 hours.
T/RH: OK. Temperatures hovering around zero; relative humidity 98% and
greater.
VOLTAGES: OK.
LEADS: Dave and I made it to Seattle yesterday morning on a thread of a bridge.
Yesterday evening that Seattle lead had reopened again. It's about
150 m south of Seattle, a few meters wide, and was impassible this
morning (to check out Seattle, the polar bear this morning had to
swim it). There is also a larger lead system north of Seattle, maybe
300 m, that extends east all the way beyond Atlanta. There also seems
to be new open water west of Baltimore.
- 495: Daily_Status, Site all, Sat 30-May-1998 09:18:18 AKDT, Site characteristics
I've reported PAM site variables occasionally in some of the daily
status reports. I thought it might be useful to summarize all those variables
in one table. The date noted refers to the time of the compass readings for
sonic heading and bearing from ship.
________________________________________________________________________________
Atlanta Baltimore Florida Seattle
________________________________________________________________________________
Date 5/21/98 5/15 5/16 5/16
Bearing from ship 84 166 9 356
(deg true)
Snow Depth (m) 0.30 0.50 0.32 0.19
Ice thickness (m) 1.9 1.4 3.0 1.9
Sonic type ATI ATI Gill ATI
Sonic head-on angle 86 66 7 13
(deg true)
Angle of sled from -78 -115 -104 -36
head-on to sonic (deg)
Height of sonic w (m) 2.22 2.34 3.42 2.87
Height of T/RH intake 1.27 1.43 1.88 1.81
(m)
Approx. distance from 1.6 4.5 0.5 0.9
ship (km)
________________________________________________________________________________
The "Angle of sled" is the sector disturbed by the PAM sled in sonic
coordinates.
SITE CHARACTERISTICS
ATLANTA: Multiyear ice; rough north and northeast starting with refrozen lead
100 m north of the station.
BALTIMORE: First-year ice; was a big lead last fall; refrozen lead and rougher
ice southeast; fairly smooth elsewhere.
FLORIDA: Multiyear floe; major ridge 200 m west; refrozen lead and ridging
200 m north; very smooth east; camp 100-500 m south, though low profile
for nearest 200 m.
SEATTLE: As if in a fortress; rimmed 100-200 m in all directions with ridges
(good spot for a bear ambush); active lead about 400 m north; many local
cracks inches to meters wide.
- 496: Daily_Status, Site all, Sun 31-May-1998 08:36:42 AKDT, Daily_Status
5/30/98 1600 - 5/31/98 1600 GMT
CURRENT WEATHER: Breeze; overcast; snow flurries; temperature -0.9 deg C
at 8:00 am; pressure 1015.6 mb. Snow soft and mushy
yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
DATA: No data from Baltimore in last 36 hours; others OK.
SONICS: Generally good.
RADIOMETERS: OK. Radiometer arm at Florida is drooping as the snow melts;
level sensor shows this change, and it`s obvious visually. We'll
have to deal with it soon.
T/RH: OK.
VOLTAGES: OK.
LEADS: Leads at edge of floe 1-3 miles away in all directions but southeast.
Atlanta lead still active. We visited yesterday and saw rafted new
ice and some open water again.
- 497: Visit_Log, Site 1, Sun 31-May-1998 23:47:49 AKDT, Atl - new flash card, modified WG to Ext-Batt
Went to Atl to swap the flash card and move the WG from the 'SOLAR-IN' to the
`EXT-BATT` connector. The flash card had the correct number of days on it. :-)
Tdry -0.24
Tdry2 -0.41
RH 90.86
Baro 1015.48
Batt 14.48
TEG 15.25
load 0.905
charge 1.547
The instruments looked and sounded good.
The lead to the east is still open and there were several cracks on the way to
the site.
Davey Wavey
- 498: Visit_Log, Site 4, Mon 01-Jun-1998 01:10:42 AKDT, Fla - New Propane and Flash Card
Swapped out propane and the flash card at Fla on May 30, 1998. The flash card
was missing some days. It should be obivous when you get them from FTP.
Tdry 0.26
Tdry2 0.23
RH 88.85
Baro 1015.56
Batt 11.91
TEG 12.55
Load 4.822 ( seems high )
charge 7.232 ( seems very high )
All of the plywood is exposed and the path is slushy but the sled and tripod
was installed on ice/ridge/hummic (sp) and seems to be solid. Good job guys!!
The instruments were clean and noisy. The radiometer boom looked sad and
droopy. We are going to try and raise it tomorrow. Several bears were in camp
this morning and walked right under the radiometers. The data should show if
a bear was doing chin ups on the boom. The bears were everywhere. Mommy bear
lead baby bear around and the baby had to check out all the equipment.
The TEG was still sparking.
One Swiss Army Knife was found under the radiometers.
Call 1(800) 4 shebop to claim.
DaVe
- 499: Rad_System, Site 4, Mon 01-Jun-1998 01:41:03 AKDT, Fla - relevel boom
Extended the feet on the boom to relevel on May 31, 1998
BEFORE
x = -0.28 y = 4.07
AFTER
x = -0.10 y = 0.22
Everything else looked good.
Mr. Costa
- 500: Daily_Status, Site all, Mon 01-Jun-1998 08:33:56 AKDT, Daily_Status
5/31/98 1600 - 6/1/98 1600 GMT
CURRENT WEATHER: light winds, overcast; fog; temperature -1.5 deg C
at 7:50 am; pressure 1018.8 mb. Snow soft
yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
DATA: No data from Baltimore in last 60 hours; gaps in Florida;
has not reported since 8GMT today, others OK.
SONICS: Generally good.
RADIOMETERS: The level of the radiometers were adjusted at Florida
by raising the legs on the radiometers boom.
T/RH: OK.
VOLTAGES: OK.
LEADS: Leads at edge of floe 1-3 miles away in all directions but southeast.
The Seattle lead is actually closing and ridging and new leads were
observed from the bridge in the vicinity of Baltimore
- 501: Daily_Status, Site all, Tue 02-Jun-1998 08:08:21 AKDT, Daily_Status
5/31/98 1600 - 6/2/98 1610 GMT
CURRENT WEATHER: light winds, some patchy fog but genreally clear,
temperature -2 deg C
at 7:40 am; pressure 1020.7 mb. Snow soft
yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
DATA: No data from Baltimore in last 84 hours; gaps in Florida;
has not reported since 9GMT today (radiometers bad since 5GMT), others OK.
SONICS: Generally good.
RADIOMETERS: The level of the radiometers were adjusted at Florida
by raising the legs on the radiometers boom.The level at Florida seems to
drift regurally.
T/RH: OK.
VOLTAGES: OK.
LEADS: Leads at edge of floe 1-3 miles away in all directions but southeast.
New leads were observed from the bridge in the vicinity of Baltimore.
- 502: Visit_Log, Site 2, Tue 02-Jun-1998 20:13:15 AKDT, Sea - TBox
The TBox at Sea has been running very high, 45C plus. I opened the vent behind the PV and cracked the lid on EVE and the Batt Box. I felt around in eve to
find what was running so hot and the hotest thing I found was the RF
transmitter. When I opened the batt box there was an odor of burnt insulation
and it was warm/hot, too. I couldn`t tell which component was the warmest.
I.B. Cooler
- 503: Daily_Status, Site all, Wed 03-Jun-1998 08:57:45 AKDT, Daily_Status
6/2/98 1700 - 6/3/98 1700 GMT
CURRENT WEATHER: light winds, foggy,
temperature -0.5 deg C
at 8:00 am local time; pressure 1021.6 mb. Snow soft
yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
DATA: No data from Baltimore in last 108 hours; gaps in Florida;
has not reported since 1330GMT today (radiometers bad since 5GMT),
others OK.
SONICS: Generally good, heaters went up 3times.
RADIOMETERS: The level at Florida seems to
drift regularly.(1->3deg)
T/RH: OK.
VOLTAGES: battery voltage slowly going down at
Florida (12.3 ->11.5 V)OK. Tbox stabilized.
LEADS: Leads at edge of floe 1-3 miles away in all directions but southeast.
- 504: Elect_Temp_Tests, Site 4, Wed 03-Jun-1998 09:50:09 AKDT, Fla down - Voltage graphic
- Previous -
Next -
Index
| Graphic: | X Window Dump located in file: /net/www/sssf/projects/sheba/logbook/log_00504-1.gif
The past two days I have had to reset the Morningstar and the attached graphics file is a plot of the voltages. Does it spark any ideas?
Dave
- 505: Daily_Status, Site all, Thu 04-Jun-1998 08:08:26 AKDT, Daily_Status
6/3/98 1600 - 6/4/98 1600 GMT
CURRENT WEATHER: light SSE winds, some fog,
temperature 0 deg C
at 7:40 am local time; pressure 1021.6 mb. Snow soft
yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
DATA: No data from Baltimore in last 132 hours; gaps in Florida;
restarted by itself 2400GMT today (radiometers bad since 1000GMT),
others OK.
SONICS: Generally good, heaters went up 1time.
RADIOMETERS: The level at Florida seems to
drift regularly.
T/RH: OK.
VOLTAGES: 11.5 at Florida and Tbox stabilized.
LEADS: Leads at edge of floe 1-3 miles away in all directions but southeast.
Leads to the N and NW keep widening.
- 506: Visit_Log, Site 3, Thu 04-Jun-1998 22:10:12 AKDT, Balt - propane, flash, freewave
Finally made it to Bal. The instruments looked good and the LEDs in eve and
the batt box looked good. I plugged Rocky in and couldn't get a prompt. I had
to cycle power on eve. That worked and I checked out the flash card and all the
data was there. Changed the flash and propane. Systems looked good. I felt
the Freewave to see if it was running, it was cool. I check the voltage 13.67 v
it seemed to fluxuate with the WG. I also noticed the RF out cable was VERY
loose. After tring to tighten it for a while I noticed it had left handed
threads. What's up with that??? Now it's good and tight. While I was putting
it back in place I noticed the LEDs in front.
carrier detect ON
clear to send flashing
transfer OFF
I watched the open TEG voltage while changing propane. It held steady at 14.50v
Installed ablation cloth around the sled and under the tripod.
Back at the ship we had data coming in, but I had to reboot pampoll first.
I tried to check again at 2200 and we stopped getting data ( all stations )
at 1900.
dmc
- 507: Visit_Log, Site 4, Thu 04-Jun-1998 22:45:44 AKDT, Fla - currents
I check out Fla's currents at the load
A-> the component
B-> current when unplugged eve OFF ( key in off pos )
C-> current when unplugged eve ON
A B C
all in 5.11 6.40
heaters 5.11 5.86
hft 5.11 6.40
level 5.15 6.40
fan 5.16 5.86
tsoil 5.17 6.40
pyg out 5.22 6.40
pyg in 5.24 6.40
pyr out 5.23 6.56
pyrin 5.23 6.55
comm 5.22 6.02
reading from rocky
load 5.818
charge 9.907
meter 6.27 ( at load )
I have been using the 10A unfused connector. Should I be using the other one?
Why? So not to much changed when unplugged. I haven't swapped out the batt box.
It might be a good to do it now. The LEDs in the Batt Box ( BB ) were
'charge' on and 'low batt' on. Maybe just a bad batt? but that LVD keeps coming
into play....
The tripod is melting into the humic. We're gonna prop it up and put down some
ablation cloth soon because the levels are bad.
dmc
- 508: Daily_Status, Site all, Fri 05-Jun-1998 07:59:19 AKDT, Daily_Status
6/4/98 1600 - 6/5/98 1600 GMT
CURRENT WEATHER: SW winds 5m/s, very foggy,
temperature -1C
at 7:40 am local time; pressure 1010.6 mb. Snow soft
yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
DATA: Baltimore started to send data but stopped at 05GMT, data looked good
some peaks in sonic data (precipitation?);
Florida stopped at the same time, radiometer data still bad;
Atlanta was off between 1730-0230GMT, goes well since (some peaks in
the sonic data)
Seattle is OK
SONICS: some peaks in the time series but it was snowing
RADIOMETERS: Florida is really not levelled anymore. We need to change its
location by a few feet
T/RH: OK.
VOLTAGES: 11.5 at Florida and Tbox stabilized.
LEADS: Leads at edge of florida 1-3 miles away in all directions but southeast.
- 509: Visit_Log, Site 4, Fri 05-Jun-1998 20:50:03 AKDT, Fla - switched TEG to Ext-Batt
Went to check out Fla, again. The data is not consistantly coming in.
Eve leds looked good and BB leds charging and low batt.
TEG in 'Solar-in' load 6.618 charge 9.598 meter 6.69
TEG in 'Ext-Batt' load 9.311 charge 11.46 meter -8.88
I left the TEG plugged in to the 'Ext-Batt' port. It's open voltage looked
normal. I also unplugged the sonic heaters and the currents didn't change. :-(
From your last emails, I checked out the black Campbell box for water/ice and
it was dry as a bone. The main teflon cable was removed durring the last test
not this one. I also left the TEG and PV connected durring the last test. I
feel the need to check it out a little more before I swap the BB. The charger
and at least one batt is in the met hut.
I dug up some buried plywood today near the stern. It was the lid of one of the
logistics boxes. Finders keepers. :-) No no I asked. We will paint it white
and cut it up for bigger feet on the tripod, then put the cloth on and around
that. One can of paint showed up and we have been using the ship's staple
gun to attach the cloth.
Bye Bye
Daver
- 510: Visit_Log, Site 1, Fri 05-Jun-1998 22:25:32 AKDT, Alt - Bears like smoke stack
Went to Atl to check out why the data we the lost data link and the bear damage
from this mornings visit. The bears ( mom and two little cubs ) stomped around
quite a bit. Smelled everything them mom didn't like the smoke stack. I need
to bang out the dents, reassemble and reinstall. The rest of the stuff looked
ok. I think she was using the WG mast as a scratching post, too.
I plugged my buddy Rocky into eve got a prompt things looked good except the
radiometers were all Nan.? Checked the flash card and all the data was on the
card. So I stopped eve, swapped the flash, it started fine and all the reading
looked good. Even the radiometers looked good. There was about 2.5 inches of
water on the plywood.
I'll see you in the machine shop.
I. C. Water
- 511: Daily_Status, Site all, Sat 06-Jun-1998 08:10:30 AKDT, Daily_Status
6/5/98 1600 - 6/6/98 1600 GMT
CURRENT WEATHER: SW winds 1m/s, cloudy but clear,
temperature 0C
at 7:40 am local time; pressure 1012.5 mb. Snow soft
yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
DATA: Baltimore is OK (some communication problems with pampoll)
Florida started to transmit at 2030GMT and stopped at 7GMT, radiometer dat a still bad. We moved the tripod yesterday==>uncorrect level+compass;
Atlanta OK, was hit by a bear yesterday
Seattle OK. A new lead opened yesterday just next to the SW of it
SONICS: OK
RADIOMETERS: radiometers at Florida are still measuring very noisy and stopped
90 minutes before the rest of the station
T/RH: OK.
VOLTAGES: low power and charge at Florida and Tbox stabilized.
LEADS: Leads at edge of florida 1-3 miles away in all directions but southeast.
New lead at Seattle (see DATA)
- 512: Visit_Log, Site 2, Sat 06-Jun-1998 19:51:37 AKDT, Sea - lead
A lead opened up about 20 feet from radiometer boom. The lead is about 60 feet
across and 250' long ( just the lake area). I couldn't spot the ends of the
lead. All the plywood is showing. I didn't see any cracks under the station. So
we got lucky. I was thinking about attaching four 55 gal drums to the tripod
via a line. The drums will be near the sled and maybe 4 to the sled/box. That
lead could have easily swallowed the station. I hope a lot of stress has been
relieved on that little peice of ice and it won't break up anymore. I got some
killer pictures.
I. C. Waterfront
- 513: Daily_Status, Site all, Sun 07-Jun-1998 08:09:08 AKDT, Daily_Status
6/6/98 1600 - 6/7/98 1600 GMT
CURRENT WEATHER: SW winds 7m/s, cloudy but clear,
temperature 0C
at 7:45 am local time; pressure 1004.0 mb. Snow frozen
and becoming soft later yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
DATA: Baltimore is OK (small gaps)
Florida and Seattle stopped to transmit between 1100 and 1215GMT,
radiometer data bad at Florida since 1215GMT.
Atlanta stopped transmitting between 2100 - 0900GMT
Seattle OK.
SONICS: OK few peaks because of precip
RADIOMETERS: radiometers at Florida stopped to measure OK at 1215GMT
T/RH: OK.
VOLTAGES: low power and charge at Florida
LEADS: No major change
- 514: Visit_Log, Site 4, Sun 07-Jun-1998 22:55:48 AKDT, Fla - power, ply and rain
Added 2' x 2' plywood under the tripod feet and added some cloth around them.
x = 0.32 y = -0.31
BB - charge and LOW batt LEDs on.
EVE - LEDs good
FW - green carrier detect and steady red `clear to send` LED. I tightened the
SMA connector.
With only the batt connected
Load 1.45
charge 0.045 ( as expected ).
TEG zero
Batt 12.04 v
TEG in 'solar-in' only
load 7.987
charge 9.143
batt 12.07
TEG 8.06 hummmm
PV in 'solar-in' only
load 1.39
charge 0.00 weird
batt 12.04
TEG 21.01
PV in 'solar-in' and TEG in 'ext-batt'
load 6.58
charge 2.46 ??
batt 11.91
TEG 12.02
TEG and PV in 'solar-in' only
load my notes have a space there ?? sorry
charge 10.14
batt 12.18
TEG 12.47
I left it in this configuration.
The compass reading 12 degrees, EVE 279.72 (w/decl )
You should also have some email about a correlation between the precipation and
data link from the ship to station. The might just be a weird coincidence.
There is a spare CR10 ( not CR10X ) and black SHEBA SPARE Campbell box in the
PAM room, that might fix the noisey rad and the Tsoil readings. This might
be the box that was switched with Clev when there were similar problems
( noisey ) last Nov. The ships antenna was adjusted and check.
Happy thoughts
D. CosTa
- 515: Daily_Status, Site all, Mon 08-Jun-1998 08:11:26 AKDT, Daily_Status
6/7/98 1600 - 6/8/98 1600 GMT
CURRENT WEATHER: W winds 4m/s, cloudy but clear,
temperature -3C
at 7:50 am local time; pressure 1010.8 mb. Snow frozen
and becoming soft later yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: Up
Bal: Up
Fla: Up
DATA: Baltimore is OK
CR10x data bad at Florida intermittently.
Atlanta is OK
Seattle is OK, needs to be levelled (y)
SONICS: fluctuating w at Florida
RADIOMETERS: OK except at Florida
T/RH: OK.
VOLTAGES: low power and charge at Florida, but stable
LEADS: No major change
- 516: Rad_System, Site 4, Mon 08-Jun-1998 21:14:10 AKDT, Fla - rad heaters & fans
Showed up and checked the logr data, all bad. Unplugged the rad fans & heaters
from the connector on the boom ( near the radiometers ). No change, then
plugged them back in and started to get good data. Is there a delay between
Rocky and the instrument? I used the 'talk` command to see if it was working,
but didn't use 'talk' when we played with the connector. Brain fuzz.
I will try to confirm using the test using the `talk' command. In any case we
left it unplugged and have been getting clean data since then.
John, I didn`t get your email until tonight and will read it over for the next
visit.
NEW heights from Fla after we moved it a little higher on the knoll and put
the white ply under the legs.
289 cm middle of the sonic boom to surface
190 cm middle of the Rad boom to surface
187 cm end of the TRH probe shield to surface
compass 11 degrees at 1100
DMC
- 517: Visit_Log, Site 2, Mon 08-Jun-1998 21:55:17 AKDT, Sea - moved
Went to check out Sea and level the boom. I noticed a very fresh crack near
the tripod. The station was now on a peninsula. I felt it was time to get a
second opinion so I called the boys in and they fired up the helicopter. They
did a fly by and we packed it up. About 2 1/2 hours later it was safe
and sound about half mile away on the other side of the original Sea lead. We
moved it by snow machine.
The plywood is in the met hut and will be painted tomorrow and when everybody is
in agreement we will redeploy.
What does that 'P' stand for again....
D. M. Costa
- 518: Daily_Status, Site all, Tue 09-Jun-1998 07:48:18 AKDT, Daily_Status
6/8/98 1600 - 6/9/98 1600 GMT
CURRENT WEATHER: W winds 3m/s, cloudy but clear,
temperature -2C
at 7:15 am local time; pressure 1007.8 mb. Snow frozen
and becoming soft later yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: down
Bal: Up
Fla: Up
DATA: Baltimore is OK
Florida is OK since we switched radiometers heater and van off.
Atlanta stopped tranmitting 2100 - 1100 GMT
Seattle was moved away yesterday, see log
SONICS: fluctuating w at Florida
RADIOMETERS: OK
T/RH: OK.
VOLTAGES: low power and charge at Florida, but stable
LEADS: Increase of activity W of the ship
- 519: Visit_Log, Site 1, Wed 10-Jun-1998 00:33:30 AKDT, Atl - propane, flash and stack
Went to change the propane and flash card. The system was down when I got
there. The LEDs on the Morningstar were flashing in sequence. I checked the
batt and it was running around ( I think ) ~ 20 volts. I checked things out.
PV and TEG in 'solar-in' ~21 volts and the WG in 'ext-batt' like I left it.
But I don't remember adjusting the pot before switching it on June 1. Now it
is adjusted to ~14.1 v and still plugged into ' ext-batt' . On the ship I
plotted the batt/teg/spd from May 28 to June 9 to see if and when the WG was
over charging the system. From the plot I noticed a gap at June 4 when
the wind was peaking. Then again when the wind increased around June 6, this is
about the time the bear was playing the sled like a piano and the batt reading
seemed noisey after that. So I can't tell if the wind or the bear introduced
the noise into the system.
Readings when I left:
batt 14.13v
TEG 14.13v
load 0.851a
charge 2.229a
Tonight on the ship the batt voltage looks clean and holding at 14.25v, iload
looks clean at 0.8a and icharge looks cleaner at 2.4a
The stack has been re-installed.
D. Costa
- 520: Visit_Log, Site 2, Wed 10-Jun-1998 22:39:05 AKDT, Welcome to Maui !! ( with revised topo )
I would like to welcome you to the new Maui site. The site is on a nice
rough peice of real estate located about 3/4 of a mile NW of Atl and 47 degrees,
1090 meters off the bow. There is a big lead about a 50 m radius going from the N to the E of the site and a 2.5 m pressure ridge that follows the lead about 30 m of the site. The tripod is on a small hummic/old pressure ridge and there
will soon be lots of melt ponds in the area.
There is also a 2 m icy peak about 10 m west of the site.
Maui came on line at 0000 GMT JD 162.
All systems NORMAL .... :-D
Mr. Costa
I changed NNW to NNE. NNW was a mistake and I added a more better topo. ( brain fuzz)
- 521: Daily_Status, Site all, Wed 10-Jun-1998 22:51:14 AKDT, Daily_Status
6/9/98 1600 - 6/10/98 1600 GMT
CURRENT WEATHER: W winds 5m/s, nice and clear,
temperature -4C
at 7:30 am local time; pressure 1007.8 mb. Snow frozen
and becoming soft later yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Sea: down
Bal: Up
Fla: Up
DATA: Baltimore is OK
Florida is OK.
Atlanta is OK
Seattle is OFF
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
VOLTAGES: low power and charge at Florida, but stable
LEADS: No change
- 522: Daily_Status, Site all, Thu 11-Jun-1998 07:50:18 AKDT, Daily_Status
6/10/98 1600 - 6/11/98 1600 GMT
CURRENT WEATHER: SW winds 2m/s, cloudy but clear,
temperature -4C
at 7:35 am local time; pressure 1012.6 mb. Snow frozen
and becoming soft later yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up
Fla: Up
DATA: Baltimore is OK
Florida is OK
Atlanta is OK
Maui is OK
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
VOLTAGES: OK
LEADS: No change
- 523: Visit_Log, Site 1, Thu 11-Jun-1998 20:49:18 AKDT, Atl - check TEG nozzle
I went to check the TEG nozzle today, that's why there's a blip in the data.
The nozzle looked OK, just a tiny bit of black. I pulled a "clean" nozzle out
of the clean nozzle bag and it looked like it had some kind of white-ish film
on the orifice. I tried it anyway, it was in the "clean" bag. As you might
expect the propane didn't flow threw the nozzle so I put the old one back and
it fired up with the manual sparker. The battery in the TEG was down to 0.9v.
I'll try to find a new one in the PAM room.
I've been noticed the iload and icharge dropping very slowly. Any thoughts?
We drilled a hole next to the sled to try and drain some of the water out. After
about 5 feet of ice we hit water and nothing happened. There's 3 inches of water
under the sled.
DaVe
- 524: Daily_Status, Site all, Fri 12-Jun-1998 08:07:03 AKDT, Daily_Status
6/11/98 1600 - 6/12/98 1600 GMT
CURRENT WEATHER: SE winds 5m/s, partially cloudy but clear,
temperature -3C
at 7:45 am local time; pressure 1018.5 mb. Snow frozen
and becoming soft later yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up
Fla: Up
DATA: Baltimore is OK
Florida is OK
Atlanta is OK
Maui is OK
SONICS: OK
RADIOMETERS: OK High incoming shortwave radiation seen yesterday at Florida
seems to be OK today
T/RH: OK.
VOLTAGES: OK Atlanta is slowy losing power (0.1 A/day)
LEADS: No change
- 525: Visit_Log, Site 2, Fri 12-Jun-1998 17:55:06 AKDT, Maui - propane, nozzle, flash and heights
I changed the propane and TEG nozzle. The nozzle was a little bit dirty.
Heights
2.23 m radiometer from the middle of the boom to the surface
3.02 m sonic ( middle of the boom to surface )
2.04 m end of TRH shield to surface
compass reading will be reported later.
The flash card had days 149-163 ( missing 160 and 161 )
Things looked good .....
I. C. Sun
- 526: Visit_Log, Site 1, Fri 12-Jun-1998 18:11:20 AKDT, Atl - nozzle, compass and heights
I changed the TEG nozzle. The nozzle was a little bit dirty and I was trying
to fix the falling icharge and iload.
Heights
1.52 m radiometer from the middle of the boom to the surface
2.39 m sonic ( middle of the boom to surface )
1.43 m end of TRH shield to surface
91 compass , eve on ship 359.5 ( w/decl )
before I changed the nozzle
batt 14.26
teg 16.65
iload 0.696
icharge 1.865
~one min after I finished changing the nozzle ( the WG kicked in like it wasn't
regulating itself ( longer than normal ) then it kicked in )
batt 14.08
teg 16.59
iload 4.039
icharge 15.74
a couple of mins after I changed the nozzle
batt 14.26
teg 16.65
iload 0.696
icharge 1.865
DavE
- 527: Daily_Status, Site all, Sat 13-Jun-1998 08:09:49 AKDT, Daily_Status
6/12/98 1600 - 6/13/98 1600 GMT
CURRENT WEATHER: SE winds 7m/s, partially cloudy but clear,
temperature -2C
at 7:55 am local time; pressure 1022.3 mb. Snow frozen
and becoming soft later yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up
Fla: Up
DATA: Baltimore is OK
Florida is OK
Atlanta is OK
Maui is OK
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
VOLTAGES: OK Atlanta is slowy losing power (0.1 A/day)
LEADS: Small activity to the NW of the ship
- 528: Visit_Log, Site 4, Sat 13-Jun-1998 18:25:53 AKDT, Fla - propane, nozzle, heaters and heights
New propane, nozzle and flash card at Fla. It took three tries to boot
eve properly.
heights/voltages/currents upon arrival
1.87 m radiometer from the middle of the boom to the surface
2.90 m sonic ( middle of the boom to surface )
1.86 m end of TRH shield to surface
batt 14.18
teg 14.45
iload 5.299
icharge 7.566
I removed one of the wires from the cut-off switch on the TEG to stop the
sparking and got these readings
iload 0.60
icharge 1.09
Then I changed the nozzle. It had a little bit of 'tar' on the ruby.
iload 1.08
icharge 1.80
So now I decided to see if we could run with the fans and heaters on.
iload 1.70
icharge 2.77
Ahhh, life is good. Then we checked the heights which took about 5 mins, came
back to Rocky and check the currents one more time, because it feels so
good when things are working.
batt 12.90
teg 13.06
iload 4.599
icharge 3.680
darn.
I dinked around with the rad. heaters and fans. Now the heaters are OFF and
the fans are ON.
batt 14.99
teg 15.09
iload 1.246
icharge 2.092 Life is good again.
The batt LEDs looked good, too. Now we just have to watch to see if the noise
creeps back into the radiometer data again.
I. M. Happy
- 529: Daily_Status, Site all, Sun 14-Jun-1998 09:18:43 AKDT, Daily_Status
6/13/98 1600 - 6/14/98 1600 GMT
CURRENT WEATHER: E winds 7m/s, clear, good visibility
temperature -3C
at 8:55 am local time; pressure 1027.0 mb. Snow slightly
frozen and becoming very soft later yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up
Fla: Up
DATA: Baltimore is OK
Florida is OK
Atlanta is OK
Maui is OK
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
VOLTAGES: OK Atlanta is always slowy losing power (0.1 A/day)
LEADS: melt ponds start to appear around the ship
- 530: RF_Communications, Site base, Sun 14-Jun-1998 19:09:53 AKDT, Base Antenna
Last week I asked the ship's tech to check out the base antenna after we had
lost the data link during the rain. He didn't find anything wrong then, but
yesterday he was up on the mast and checked the N connector between the ship's
heliax and the NCAR antenna cable. The connector was full of water. He dried
and taped it back up. This should help out on those rainy days.
dmc
- 531: Visit_Log, Site 1, Sun 14-Jun-1998 19:23:07 AKDT, Atl - low iload problem
I have been noticing current at Atl was slowly decreasing. Today I went to reset
the batt charger. Things looked good when I arrived. BB LEDs charge and
full batt.
batt 14.40
teg 17.07 light winds and lots of sun
iload 0.632
icharge 1.774
I tried to reset the charger by disconnecting the pos on the batt and nothing
happened. BB LEDs charge and full batt. I then removed the solar-in and ext-
batt and ran eve on the batt for a while.
batt 13.14
teg 00.00
iload 1.019 more normal
icharge 0.000
Then I tried to reset the charger again after letting things settle and the
charger reset no problem.
When I left ( after letting it settle again )
batt 13.78
teg 13.84
iload 0.978
icharge 2.957
It will be interesting to see if it holds, if not I will replace the batt.
Costa
- 532: Visit_Log, Site 4, Sun 14-Jun-1998 19:49:13 AKDT, Fla - 6 sec blip
While at Fla the other day I noticed a six sec "blip" on the current meter
that's mounted on the inside of the box with the TEG electronics. I hadn't
noticed it before.
Any ideas??
dmc
- 533: Daily_Status, Site all, Mon 15-Jun-1998 07:54:51 AKDT, Daily_Status
6/14/98 1600 - 6/15/98 1600 GMT
CURRENT WEATHER: SE winds 6m/s, clear, good visibility
temperature -4C
at 8:40 am local time; pressure 1028.3 mb. Snow slightly
frozen and becoming very soft later yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up
Fla: Up
DATA: Baltimore is OK
Florida is OK
Atlanta is OK
Maui is OK
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK Atlanta seems to do better.
LEADS: melt ponds start to appear around the ship and near Florida.
- 534: Rad_System, Site 4, Mon 15-Jun-1998 16:31:25 AKDT, Fla - uppper heater on
Plugged the upper heater on to eliminate frosting. We need to watch for noise
in the logger data.
batt 14.34
teg 16.03
iload 1.478
icharge 1.865
The currents looks OK and still MUCH better than before.
The 6 sec pulse is not gone. I noticed the same pulse at Maui today.
We also anchored the tripod down.
Daver
- 535: Visit_Log, Site 2, Mon 15-Jun-1998 16:43:48 AKDT, Maui - compass and leveling
Leved Maui
x = 0.34
y = -0.01
compass 47.5 Rocky 316.96 ( w/decl ) :-)
I did notice the 6 sec pulse on the TEG current meter. Everything else was
great.
I. C. Ice
- 536: Daily_Status, Site all, Tue 16-Jun-1998 07:59:00 AKDT, Daily_Status
6/15/98 1600 - 6/16/98 1600 GMT
CURRENT WEATHER:E winds 7m/s, cloudy, good visibility
temperature -2C
at 8:45 am local time; pressure 1024.0 mb. Snow slightly
frozen and becoming very soft later yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up
Fla: Up
DATA: Baltimore is OK
Florida stopped communicating at 0700GMT
Atlanta is OK
Maui is OK
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: iload and icharge jumped from .2 to ~4.5A just before Florida died.
Baltimore's iload seems to slowly decrease
LEADS: no particular change
- 537: Rad_System, Site 4, Tue 16-Jun-1998 20:59:04 AKDT, Fla - heater, current and blip
Had a little visit to Fla today to figure out what happened overnight. The
station went down around 0100. I found the F1 fuse had blown, a 5A slow blow.
About 1400 June 15 iload jumped to 1.5A then at 2300 to 4.5A. After an hour and
a half at 4.5A the fuse probably blew. I replaced the fuse and plugged the lower
heater ON and unplugged the upper heater. Both heaters measured 30.9 ohms.
I pulled the radiometer shield off to check inside things and it looked ok. I
didn't pull the dome off or see any desiccant capsules.
I noticed tonight after about four hours the current jumped from ~1.2A to ~1.45A
We'll see if the lower heater blows the fuse and/or is noisey.
The six sec blip `down` is back. I will see what happens when I plug the
auto-ignition back on.
Leveled the radiometers
x = 0.09 y = 0.04
I. M. Searching
- 538: Daily_Status, Site all, Wed 17-Jun-1998 08:03:43 AKDT, Daily_Status
6/16/98 1600 - 6/17/98 1600 GMT
CURRENT WEATHER:SE winds 9m/s, cloudy, good visibility
temperature -0C
at 8:50 am local time; pressure 1022.4 mb. Snow
slightly frozen in the morning and becoming
very wet yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up
Fla: Up
DATA: Baltimore is OK
Florida is OK
Atlanta is OK
Maui is OK
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK
LEADS: Melt ponds appear everywhere, especially near Maui
- 539: Daily_Status, Site all, Thu 18-Jun-1998 08:19:02 AKDT, Daily_Status
6/17/98 1600 - 6/18/98 1600 GMT
CURRENT WEATHER:SE winds 9m/s, cloudy, good visibility
temperature -2C
at 8:50 am local time; pressure 1021.1 mb. Snow
very wet yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Moved the sled up by putting blocks underneath (lot of water).
Climbed to the tripod to check Ts ==> levels slightly changed
Drained the hole, it worked a little bit
Mau: Up
Bal: Up
Fla: Up
DATA: Baltimore is OK
Florida is OK
Atlanta is OK
Maui is OK
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK
LEADS: Little lead activity to the N.
- 540: Daily_Status, Site all, Fri 19-Jun-1998 07:59:47 AKDT, Daily_Status
6/18/98 1600 - 6/19/98 1600 GMT
CURRENT WEATHER:SE winds 7m/s, cloudy, good visibility
temperature -2C
at 7:50 am local time; pressure 1015.0 mb. Snow
very wet yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up - visited by helicoptere yesterday (Dave Costa)
Fla: Up
DATA: Baltimore is OK
Florida is OK
Atlanta is OK
Maui is OK
All stations stopped communicating since 1145GMT
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK
LEADS: No new activity.
WATER PONDS: still increasing.
- 541: Visit_Log, Site 3, Fri 19-Jun-1998 19:18:48 AKDT, Bal - propane, nozzle, flash, heights and compass
Went to Bal by helo yesterday ( 6/18/98 ) for a check up.
The bottom of the box was in the water ( slighty salty ) about 1.5" There was
some ice on the SW radiometers that got cleaned.
heights
263 cm middle of the sonic boom to surface
171 cm end of TRH shield to surface
171 cm from middle of radiometer to surface
compass 70 degrees Rocky 342.06 ( w/decl )
The TEG nozzle had a tiny bit of 'tar' on it and I switched it with a new one.
The flash card had the correct days on it ( 155 - 169 ). I switched out the
propane and raised the sled about 4". We might punch a hole in the ice later
to see if some water will drain down, not up.
I. M. Fly Boy
- 542: Daily_Status, Site all, Sat 20-Jun-1998 09:12:54 AKDT, Daily_Status
6/19/98 1600 - 6/20/98 1600 GMT
CURRENT WEATHER:No wind, cloudy, poor visibility, light snow/rain
temperature -0C
at 8:15 am local time; pressure 1008.5 mb. Snow
very wet yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up
Fla: Up
DATA: Baltimore is OK
Florida was on and off communicating with ship
Atlanta is OK
Maui is OK
SONICS: OK
RADIOMETERS: OK. Probably water or ice on Maui's uplooking pyrgeometer.
all sensors may have been wet (drizzle)
T/RH: OK.
VOLTAGES: OK iload slowly decreasing at Maui
LEADS: Extension of the leads to the North of Maui
WATER PONDS: still increasing.
- 543: EVE, Site 4, Sun 21-Jun-1998 10:23:55 AKDT, Fla - new config s04_0052.dat
Downloaded the new s04_0052.dat (size 18345) to Fla. When we looked at eve we
found a s03_0053.dat ( size 19955 ) and config.dat ( size 18070 ) not a 04 file
Fla is site FOUR not three and we don`t know were that config.dat was copied
from. That might be one source of some of the problem.
New config looks like:
s04_0052.dat on Fla EVE
config.dat on Fla EVE
60 shebop:/home/pam/config-> ls -l *0052*
-rw-r--r-- 1 pam pam 18362 Jun 19 13:09 fmt0052.dat
-rw-rw-r-- 1 pam pam 18160 Jan 28 12:24 fmt0052.old
-rw-rw-r-- 1 pam pam 18954 Jun 20 13:10 s01_0052.dat
-rw-rw-r-- 1 pam pam 18954 Jun 20 13:10 s02_0052.dat
-rw-rw-r-- 1 pam pam 18954 Jun 20 13:10 s03_0052.dat
-rw-rw-r-- 1 pam pam 18954 Jun 20 13:10 s04_0052.dat
8 pampoll:/home/pam/config-> ls -l *0052*
-rw-r--r-- 1 pam pam 18362 Jun 19 13:09 fmt0052.dat
-rw-rw-r-- 1 pam pam 18160 Jan 28 12:24 fmt0052.old
-rw-rw-r-- 1 pam pam 18954 Jun 20 13:10 s01_0052.dat
-rw-rw-r-- 1 pam pam 18954 Jun 20 13:10 s02_0052.dat
-rw-rw-r-- 1 pam pam 18954 Jun 20 13:10 s03_0052.dat
-rw-rw-r-- 1 pam pam 18954 Jun 20 13:10 s04_0052.dat
The update on Fla took place at 2330 on June 20, 1998 JD 171.
We found that the command xmodem -yt sXX_NNNN.dat works better than xmodem -yrt
in the "From PC to EVE via Ymodem" section of the Software Guide.
That way the rest of the instructions makes sense. Maybe also change the
"upload button" to the "send file button", just a minor point.
The "Direct Download of Configuration from Base to EVE" aborted by itself (timed
out).
Dominique et moi
- 544: Daily_Status, Site all, Sun 21-Jun-1998 11:12:53 AKDT, Daily_Status
6/20/98 1600 - 6/21/98 1600 GMT
CURRENT WEATHER:E winds 10m/s, cloudy with patch of fogs.
temperature -1C
at 10:00 am local time; pressure 1011.9 mb. Snow
very wet yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up. A hole was drilled and water was down 3 inches when
they left with the helicopter.
Fla: Up put a new config.dat file on eve (see log)
DATA: Baltimore is OK
Florida is OK
Atlanta is OK
Maui is OK
SONICS: OK Tc is different since the config.dat switch. It seems that it
was looking more like the other ones before the switch!
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK
LEADS: no changes
WATER PONDS: stable, maybe a slight increase
- 545: Daily_Status, Site all, Mon 22-Jun-1998 07:50:05 AKDT, Daily_Status
6/21/98 1600 - 6/22/98 1600 GMT
CURRENT WEATHER:E winds 10m/s, partly cloudy, but excellent visibility.
temperature 0C
at 07:30 am local time; pressure 1018.7 mb. Snow
very wet yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up.
Fla: Up
DATA: Baltimore is OK
Florida is OK
Atlanta is OK
Maui is OK
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK
LEADS: no changes
WATER PONDS: stable, maybe a slight increase, especially
between Florida and the met tower.
- 546: Visit_Log, Site 1, Mon 22-Jun-1998 14:31:36 AKDT, Atl - propane, nozzle, flash, heights and compass
I went to Atl changed of the propane, nozzle and flash card. The instruments
looked clean.
heights
251.0 cm middle of the sonic boom to surface
160.5 cm end of TRH shield to surface
172.5 cm from middle of radiometer to surface
compass 95 degrees Rocky 363.91 ( w/decl )
The TEG nozzle was clean but I switched it with a new one because I didn`t know
when it would be serviced again.
The flash card had the correct days on it ( 160 - 173 ).
Mr. Coster
- 547: Daily_Status, Site all, Tue 23-Jun-1998 08:41:50 AKDT, Daily_Status
6/22/98 1600 - 6/23/98 1600 GMT
CURRENT WEATHER:E winds 8m/s, sunny and clear, excellent visibility.
temperature 0C
at 07:50 am local time; pressure 1024.3 mb. Snow
very wet yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up.
Fla: Up
DATA: Baltimore is OK
Florida is OK.Level is above by 1deg. Shadow of the ship is now passing
over the radiometers (as over those from Metropolis) at about 0330GMT.
Atlanta is OK
Maui is OK. XLevel jumped 2deg at 0130GMT
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK
LEADS: no changes
WATER PONDS: stable, drained around the met hut and between Met hut and Florida
- 548: Visit_Log, Site 2, Tue 23-Jun-1998 20:30:43 AKDT, Mau - level and heights
The y level at Maui jumped from 0.55 to 2.5 around 1800 on June 22. We tried
leveling it today ( @ 1515) and Rocky wasn't recording the changes when we were
adjusting the boom. I think the level sensor has malfunctioned, so we did the
best we could with the bubble level.
heights
303 cm middle of the sonic boom to surface
192 cm end of TRH shield to surface
227 cm from middle of radiometer to surface
dmc
- 549: Daily_Status, Site all, Wed 24-Jun-1998 08:03:45 AKDT, Daily_Status
6/23/98 1600 - 6/24/98 1600 GMT
CURRENT WEATHER:N winds 3m/s, sunny and clear, excellent visibility.
temperature -0.5C
at 07:45 am local time; pressure 1022.0 mb. Snow
wet yesterday.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up.
Fla: Up
DATA: Baltimore is OK
Florida is OK. Level above 1.
Atlanta is OK
Maui is OK. Automatic Ylevel is bad
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK. Iload decreasing at Atlanta
LEADS: no changes
WATER PONDS: stable. Still a lot of snow melting.
- 550: Daily_Status, Site all, Thu 25-Jun-1998 08:10:02 AKDT, Daily_Status
6/24/98 1600 - 6/25/98 1600 GMT
CURRENT WEATHER:N winds 1m/s, partially cloudy, good visibility.
temperature -1.5C
at 07:45 am local time; pressure 1016.0 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up.
Fla: Up
DATA: Baltimore is OK
Florida is OK.
Atlanta is OK
Maui is OK. Automatic Ylevel is bad
SONICS: OK mean w may be too high (.2 m/s)
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK.
LEADS: no changes
WATER PONDS: partially drained
- 551: Visit_Log, Site 2, Thu 25-Jun-1998 11:55:27 AKDT, Maui - propane, nozzle, flash
I went to Maui with Don and Bonnie (PAM station transition people) changed the
propane, nozzle and flash card. The instruments
looked clean.
The TEG nozzle was OK but I switched it for training purposes.
The flash card had the correct days on it ( 163 - 176 ).
Dave and Christine(PAM computer transition person)
- 552: Daily_Status, Site all, Fri 26-Jun-1998 08:05:16 AKDT, Daily_Status
6/25/98 1600 - 6/26/98 1600 GMT
CURRENT WEATHER:SW winds 1m/s, partially cloudy, good visibility.
temperature -2C
at 07:50 am local time; pressure 1013.8 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up.
Fla: Up
DATA: Baltimore is OK. Tbox high (45C)
Florida is OK.
Atlanta is OK.
Maui is OK. Ylevel is bad
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK.
LEADS: no changes
WATER PONDS: no changes
- 553: Visit_Log, Site 4, Fri 26-Jun-1998 13:20:17 AKDT, Fla - propane, flash, rad heater
I changed the propane and flash card. The instruments looked clean.
Swapped out the F1 5A slow blow fuse with a 2A slow blow in the Batt Box.
The flash card had the correct days on it ( 164 - 177 ).
new level x = -0.06 y = 0.24 I applied some anti-seize to the leveling
screws. One was jammed the other was free. It might be nice to have some type
of anti-seize on future installations.
While I was at the radiometers I heard the fans quit for a sec. After poking
around I noticed the unused pos. heater/fan leads grounding to the radiometer
"cage". That might have been part of the high current/noise prob. I taped up
loose ends and plugged the upper heater back in ( the lower one was already
on ). The load current jumped from ~1.1A to ~1.7A and charge ~1.75A to ~2.7A,
not to bad. I didn't want to confuse the issue and test what would happen with
the SOV plugged in too. Now, we just need to see if the noise pops up again.
Hugs
- 554: Daily_Status, Site all, Sat 27-Jun-1998 09:07:58 AKDT, Daily_Status
6/26/98 1600 - 6/27/98 1600 GMT
CURRENT WEATHER:E winds 7m/s, cloudy, good visibility.
temperature -2C
at 08:00 am local time; pressure 1013.9 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up.
Fla: Up
DATA: Baltimore is OK.
Florida is OK.
Atlanta is OK.
Maui is OK.
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK.
LEADS: no changes
WATER PONDS: no changes
- 555: Visit_Log, Site 2, Sat 27-Jun-1998 09:11:39 AKDT, Maui - Levels
At 1509 local, we checked the levels at Maui with the bubble level.
We leveled the radiometers and discovered that the electronic level
showed Xlevel=-0.15 and Ylevel=0.86 with the bubble level exactly flat.
Hugs
- 556: Visit_Log, Site 1, Sat 27-Jun-1998 09:37:42 AKDT, Atl - Levels
At 1614, we checked the levels at Atlanta with the same bubble level as as Florida. We leveled the radiometers and discovered that the electronic level
showed Xlevel=-0.90 and Ylevel=0.22 with the bubble level exactly flat.
We decided to set the levels according to the electronic one
Xlevel=0.01 (1/3 bubble off) and Ylevel=0.05 (1/10 bubble).
Salutations
- 557: Daily_Status, Site all, Sun 28-Jun-1998 10:02:41 AKDT, Daily_Status
6/27/98 1600 - 6/28/98 1600 GMT
CURRENT WEATHER:E winds 5m/s, foggy.
temperature -0C
at 09:15 am local time; pressure 1007.7 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up.
Fla: Up
DATA: Baltimore is OK.
Florida is OK.
Atlanta is OK.
Maui is OK.Ylevel > 1.0
SONICS: OK
RADIOMETERS: OK. Strange incoming longwave raditaion at Maui (Rime?)
T/RH: OK.
VOLTAGES: OK. Slow decrease in iload in Florida
LEADS: no changes
WATER PONDS: no changes
- 558: Thermal_Generators, Site 4, Mon 29-Jun-1998 00:45:54 AKDT, Fla - SOV, current
We had such good results with both the heaters and fans on, that we decided to
try connecting the SOV back up. At 1430 the SOV spade plug was reconnected with
no immediate ill effects. Ten and half hours later it's still good. No noise or
high current. The auto-spark did not come on either. :-)
See ya soon .... ?
- 559: Daily_Status, Site all, Mon 29-Jun-1998 08:08:31 AKDT, Daily_Status
6/28/98 1600 - 6/29/98 1600 GMT
CURRENT WEATHER:S winds 2m/s, cloudy (stratus).
temperature -0C
at 07:50 am local time; pressure 1011.4 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up.
Fla: Up
DATA: Baltimore is OK.
Florida is OK.
Atlanta is OK.Noisy compass data as soon as sonic heater ON
Maui is OK. Noisy compass data as soon as sonic heater ON
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK.
LEADS: no changes
WATER PONDS: slight increase around ship.
- 560: Daily_Status, Site all, Tue 30-Jun-1998 07:58:29 AKDT, Daily_Status
6/29/98 1600 - 6/30/98 1600 GMT
CURRENT WEATHER:S winds 5m/s, clear with very fews cumulus.
temperature -1C
at 07:50 am local time; pressure 1015.0 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up.
Fla: Up
DATA: Baltimore is OK.
Florida is OK.
Atlanta is OK.
Maui is OK.
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK.
LEADS: no changes
WATER PONDS: slight increase around ship.
- 561: Visit_Log, Site 3, Tue 30-Jun-1998 09:08:56 AKDT, Bal - propane, flash, heights and compass
We went to Bal by helo and changed the propane and flash card. The instruments
were a little wet. 1030 AKDT June 29, 1998
heights
268 cm middle of the sonic boom to surface
180 cm end of TRH shield to surface
179 cm from middle of radiometer to surface
compass 72.5 degrees Rocky 340.95 ( w/decl )
The flash card had the correct days on it ( 169 - 180 ).
We leveled the radiometers with the bubble level and Rocky read:
x = 0.23 y = -0.10
Team SHEBA
- 562: Rad_System, Site all, Tue 30-Jun-1998 09:27:57 AKDT, Electronic level calibrated with the bubble level
The electronic levels were calibrated with the bubble level on
June 27 & 29, 1998.
at a level bubble
station x y
1 Atl -0.90 0.22
2 Mau -0.15 0.86
3 Bal 0.23 -0.10
4 Fla 0.27 0.04
Fla needs to be rechecked when the "frozen" leveling screw is freed. We suggest
that these be the new zero values when checking the electronic x & y data in
iplot() or from eve_console.
sheba
- 563: Thermal_Generators, Site 4, Tue 30-Jun-1998 12:35:08 AKDT, Fla - tour de current
We were at Fla yesterday checking the levels and giving a little tour of the
station. We noticed the current was high again. About the same time the
tour was focusing on the TEG. We found that when the door was shut the current
was high and low when open. Very repeatable. We noticed the white/red TEG
output wire was being pinched between the TEG door and TEG heat sink. We moved
the wire back into what looked like a access slot in the side so it wouldn't
get pinched when the door is closed. The data has looked good since then.
Now the interesting part, the auto-ignitor whould spark whenever someone whould
bend near the TEG. It could be some weird electro-magnetic field thing or
maybe the way we were leaning on the sled might have moved some loose wires.
We'll to isolate the problem area if time permits. Everything is currently
connected ( SOV, heaters and fans )
Dr. Sheba
- 564: Daily_Status, Site all, Wed 01-Jul-1998 08:22:05 AKDT, Daily_Status
6/30/98 1600 - 7/01/98 1600 GMT
CURRENT WEATHER:S winds 15m/s, foggy.
temperature +1C
at 08:10 am local time; pressure 1011.6 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up.
Fla: Up
DATA: Baltimore is OK.
Florida is OK.
Atlanta is OK.
Maui is OK.
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK.
LEADS: slight increase to the North (old Seattle)
WATER PONDS: slight increase around ship.
- 565: Daily_Status, Site all, Thu 02-Jul-1998 08:14:16 AKDT, Daily_Status
7/01/98 1600 - 7/02/98 1600 GMT
CURRENT WEATHER:NW winds 1m/s, foggy.
temperature +0C
at 08:00 am local time; pressure 1010.9 mb.
BASE: pampoll up, SHEBOP up
STATIONS: Atl: Up
Mau: Up
Bal: Up.
Fla: Up
DATA: Baltimore is OK.
Florida is OK.
Atlanta is OK. Atlanta stopped transmitting at 1930GMT
Maui is OK.
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK.
LEADS: No change.
WATER PONDS: slight increase around ship.
- 566: Daily_Status, Site all, Fri 03-Jul-1998 07:49:20 AKDT, Daily_Status
7/02/98 1600 - 7/03/98 1600 GMT
CURRENT WEATHER:E winds 2m/s, overcast, good visibility
temperature -1C
at 08:00 am local time; pressure 1009.4 mb.
BASE: pampoll working but data not getting through. Pampoll rebooted. All sites now reporting, including Atlanta. Unknown what caused Atlanta to stop reporting on July 2 and the rest at 0800 GMT July 3. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA: FLA,Maui,Bal stopped reporting at 08 UTC Jul 3 - need to
reboot pampoll
Baltimore is OK.
Florida is OK.
Atlanta stopped transmitting at 1930GMT July 1
Maui is OK.
Update: All data is OK - including Atlanta - missing data from Atl recovered
Load at Atlanta oscillating just before it stopped on July 2, but looks fine now.
SONICS: OK
RADIOMETERS: OK.
T/RH: OK.
VOLTAGES: OK.
LEADS: No change.
WATER PONDS: very slight increase around ship.
- 567: Daily_Status, Site all, Sat 04-Jul-1998 07:56:30 AKDT, Daily_Status
7/03/98 1600 - 7/04/98 1600 GMT
CURRENT WEATHER:SW winds 3m/s, overcast, fog, 0.25 mi visibility
temperature -1C
at 08:00 am local time; pressure 1002.3 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK.
Florida is OK.
Atlanta is OK
Maui is OK.
SONICS: Atl heaters cycling in last 6 hrs. All OK.
RADIOMETERS: OK.
T/RH: OK.
LEVELS, COMPASS: Maui & Fla need to be releveled.
VOLTAGES: Atl teg volt. > 15 V prior to 2300 AKDT, then oscillating between 13-14 volts. Atl bat volt 13-14 volt, with oscillations during last 7 hrs. Atl load 1.2 A increasing slowly.
Maui: teg: 13.5-14.5 v; bat:13-14 v
Bal: teg: 13-14 V; bat: 13-14 V
Fla: teg:13.3-14.2 V; bat:13-13.9 V
LEADS: No change.
WATER PONDS: No change around ship.
- 568: Visit_Log, Site 4, Sat 04-Jul-1998 20:17:00 AKDT, Fla. -- and other questions?
Went to Fla. Today.
Flux plate has melted into the ice 12 to 15 cm and is now vertical, measuring horizontal flux instead of vertical. We have started chipping it out of the iceand hope to finish tomorrow.
Found Thermistor had melted itself into the ice 6 to 8 cm, and was sitting in a flooded melt hole. Thermistor was being exposued to direct sun light in this hole. We have obtained alum. foil to wrap thermistor in. Moved thermistor and placed it under 1cm snow at 1900 gmt today (July 4, 1998). Will wrap in alum.
foil tomorrow.
Based on a look at the data we suspect that the Thermistors at Maui and Balt. are probably in a status simular to what we found at Fla. The flux plates may
also be melted in at these sites. We plan on repositioning these on our next
visit if needed. We also plan on wrapping all of the thermistors in Alum. foil.
Ola has wrapped the therm.at the tower and this seems to have cured the melting
problem there. Any questions or objections, please let us know.
Attempt to level radiometers, but one of the leveling screws will not turn.
Sprayed with lubricating stuff, still would not turn. Letting it set over-
night. I have sesrched the pam room for a spare leveling screw, but could
not locate one., are there any spares?
Temperatures of the teg boxes are reporting 35 to 40 C. What is the upper
limit on these temperatures. Suggestions on reducing temperature would
be appreciated. One thought that we had would be to install the old
radiometer fans into the vents on the pam box to blow in cooler air. Do
these fans still exist here and is there enough power in the boxes to run them?
- 569: Daily_Status, Site all, Mon 06-Jul-1998 07:49:46 AKDT, Daily_Status
7/05/98 1600 - 7/06/98 1600 GMT
CURRENT WEATHER:WNW winds 4m/s, light fog, 1 mi visibility
temperature -1.5C
at 08:00 am local time; pressure 1013.0 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK, except Tsoil of doubtful value.
Florida is OK. Tsoil & Gsoil reading something useful as of 0400 UTC.
Atlanta is OK
Maui is OK, except Tsoil of doubtful value.
SONICS: Atl, Maui, Bal heaters cycling up to 00 UTC because of steady rainfall.
Atl sample rate undefined until 0100 UTC. Wind data looks good except for spikes
at Maui and Atl at 2300 UTC.
RADIOMETERS: OK.
T/RH: OK.
LEVELS, COMPASS: Maui needs to be leveled. Fla better now.
VOLTAGES:
Atl: teg volt. > 15 V; bat: 14-14.5 V
Maui: teg: >15 v; bat:13.5-14.5 v
Bal: teg: >15 V; bat: 14-14.5 V
Fla: teg:13-14.5 V; bat:13-14 V
LEADS: No change.
WATER PONDS: Sizes increased, but ice on them this morning.
- 570: Visit_Log, Site 1, Mon 06-Jul-1998 15:33:20 AKDT, Atlanta-regular visit
Visited Atlanta at 1820 UTC 980706
Changed propane tanks and flashcard.
Heights: Sonic-snow surface: 277 cm
Downward-looking radiometer domes to snow surface: 166 cm
Orientations: Radiation arm: 272 deg T (22 deg declination)
T/RH/Compass arm: 174 deg T
Sonic arm: 82 deg T
Sled from sonic: 355-004 deg T
Radiometers were clean. Radiometer levels were still within 1 deg of optimal,
but they were leveled with the bubble level anyways. Splus shows an improvement in the levels.
Tsoil sensor in water 20 cm below surface. It does not appear to be getting
solar radiation, as it has no "groove" in the ice like the one at Fla did.
Could not see the heat flux plate, so did nothing with either one.
General conditions: Melting has been strong for the past month, and yesterday
it rained moderately for 19 hours (20-25 mm accumulation at the met tower), and last night it cleared up and refroze. So, the surface at ATlanta was hard,
crusty snow. The wooden sled platform is sitting in a sled-induced meltpond,
but the top of the wood is mostly dry. The sled is well above the water. The
Atlanta lead runs WNW-ESE and is located 91 paces (meters?) along 30 deg true
from the Atlanta sonic. The "lead" is currently a wide area (> 100 m) of open
water, ice floes, and ice/snow slurry, all intermixed. Very confusing.
Photographs were taken of the Atlanta site and the Atlanta lead.
- 571: Visit_Log, Site 2, Mon 06-Jul-1998 15:53:19 AKDT, Maui visit
Visited Maui at 1920 UTC 980706.
Radiometers: upwelling SW had ice/frost on it. It was cleaned. Leveled the
radiometers with the bubble level.
Tsoil sensor was 6 inches in the ice in an open groove. It was not in water,
thereby explaining the 4 deg C temperature. It was repositioned on top of the
ice and covered with about 1 cm of coarse-grained snow (ice?) crystals. At
next visit, we will wrap the Tsoil sensor in aluminum foil.
The flux plate had a visible melt crack in the ice, but the plate was not
visible in the crack. It is unknown whether it is horizontal or on edge.
Therefore, we did not try to remove it or move it.
Photographs were taken of the Tsoil and flux plate melt cracks, as well as the
Maui site.
- 572: Daily_Status, Site all, Wed 08-Jul-1998 07:44:37 AKDT, Daily_Status
7/07/98 1600 - 7/08/98 1600 GMT
CURRENT WEATHER:WSW winds 6m/s, partly cloudy, excellent visibility
temperature 0 C at 08:00 am local time; pressure 1018.3 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK, except Tsoil of doubtful value.
Florida is OK.
Atlanta is OK
Maui: Even after Tsoil sensor wrapped in Al foil and repositioned, values
still>0 C. Concern of bad sensor.
SONICS: Atl heaters cycling occasionally. Wind data looks good.
RADIOMETERS: OK.
T/RH: OK.
LEVELS, COMPASS: Maui better now. Bal y is getting near limit.
VOLTAGES:
Atl: teg volt. 14.5->15 V; bat: 14.5 V
icharge: 2->2 A ; iload: 1 A with spikes
Maui: teg: 14 - >15 v; bat:13.5-14.5 v
icharge:1.4-1.6 A; iload: 1.2 A
Bal: teg: 14-14.5 V; bat: 14 V
icharge: 1.4- >2 A; iload: 1.6 A
Fla: teg:13.5-14.5 V; bat:13-14 V
icharge: > 2 A; iload:1.65 A
LEADS: No change.
WATER PONDS: Slowly increasing in number, size and depth.
- 573: Visit_Log, Site 2, Wed 08-Jul-1998 08:08:18 AKDT, Maui visit
Visited Maui at 1830 UTC 980707.
Radiometers: All OK. Leveled the radiometers with the bubble level.
Wrapped Tsoil sensor in Al foil and repositioned on top of the
ice and covered with about 1 cm of coarse-grained snow (ice?) crystals. The
flux plate had a visible melt crack in the ice, but the plate was not
visible in the crack. It is unknown whether it is horizontal or on edge.
Therefore, we did not try to remove it or move it.
Propane and flashcard replaced.
Made height and angle measurements:
Heights:
Sonic - snow: 123 inches
Radiometer domes-snow: 65 inches
Angles:
Radiometer arm: 219 deg T (22 deg declination)
Compass arm:123 deg T
Sonic arm:36 deg T
Sled-sonic angle: 335-347 deg T
- 574: Visit_Log, Site 3, Thu 09-Jul-1998 14:06:36 AKDT, Baltimore visit
Visited Baltimore at 1735-1830 UTC 980709
General site description: ABout 3 cm of crusty, coarse-grained snow(loose ice?)around tripod. Most of floe has no snow or just this coarse-grained snow/ice. Don Perovich reports that the meltponds have gone down 5-10 cm in the past 10 days, probably because the floe has become lighter. ABout 6-10 cm of wet, slushy snow near sled, but sled in a self-made meltpond. The plywood has some water on it, but the sled, including the skis, are totally free of the water as the skis are sitting on some 2x4s on top of the plywood. One side of the plywood is
near the center of the meltpond, and needs to propped up with some wood on the
next trip. The ice thickness in the meltpond drainhole is 114 cm, with a 3 cm
false bottom in it. Hence, the sled is in no danger of melting through in the
near future.
Radiometers: All OK. Leveled the radiometers with the bubble level.
Tsoil, Gsoil: The Tsoil sensor was in a meltwater crack about 8 cm deep, with the crack oriented towards the SW. It's likely that it was receiving significant amounts of at least reflected solar radiation, if not direct. Wrapped Tsoil
sensor in Al foil and repositioned on top of the ice and covered with about 3 cmof coarse-grained snow (ice?) crystals.
The flux plate was in a visible melt crack in the ice, but the plate was only
visible by peering carefully in a certain direction, so it was probably not getting direct solar radiation, but maybe some reflected. It was seen to be
oriented at a 45 degree angle with the dot up, so we decided to dig it up and
reposition it. It was wrapped in foil, positioned on top of the blue ice with
the dot up, and covered with 8 cm of crusty, coarse-grained snow.
Propane and flashcard replaced. Eve and teg box lids cracked even more than
before.
Made height and angle measurements:
Heights:
Sonic - snow: 269 cm
Downward looking radiometer domes to the snow: 179 cm
Angles: (the following angles are very tentative, because another compass was
used than at other sites, and the readings with the ship orientation and the Eve output was significantly different than the reading from the handheld compass.)
Radiometer arm: 207 deg mag
Compass arm:159 deg mag (note that Eve was reading 312 deg mag - 336 deg True. Even if we assume a 180 deg error, there is still an error equal to the declination. Confusing- problem with compass??)
Sonic arm:48 deg mag
tripod to ship: 338 deg mag (note that Splus showed a direction from Fla to Bal of 165 deg T, which should give a 321 deg mag reading to the ship from Bal -
again, a significant error)
Sonic-sled angle: forgot to measure, but about 320 deg T
Took numerous photos of tripod, sled, area, including 5 from the helicopter.
- 575: Daily_Status, Site all, Fri 10-Jul-1998 07:49:34 AKDT, Daily_Status
7/09/98 1600 - 7/10/98 1600 GMT
CURRENT WEATHER:NE winds 3m/s, clouds, foggy, vis about 1 km.
temperature 0 C at 08:00 am local time; pressure 1015.1 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is OK.
Atlanta is OK
Maui: Tsoil sensor may be bad. Too warm.
SONICS: No heaters cycling. Wind data looks good except spikes at Bal and Atl.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Maui out of level. Rest OK.
VOLTAGES:
Atl: teg volt. >15 V; bat: 14-14.5 V
icharge: 2 A ; iload: 1 A with spikes
Maui: teg: 13.5- 14.5 v; bat:13-14 v
icharge:1.6->2 A; iload: 1.2 A
Bal: teg: 13-15 V; bat: 13-14 V
icharge: >2 A; iload: 1.6 A
Fla: teg:13.5-14.5 V; bat:13.2-13.8 V
icharge: > 2 A; iload:1.65 A
LEADS: No change.
WATER PONDS: Slowly increasing in number and size.
- 576: Daily_Status, Site all, Mon 13-Jul-1998 09:14:42 AKDT, Daily_Status - 7/11/98
7/10/98 1600 - 7/11/98 1600 GMT
CURRENT WEATHER:NE winds 2m/s, pt. cloudy, fog, vis 1km
temperature 1.5C at 08:00 am local time; pressure 1020.8 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is OK.
Atlanta is OK
Maui: Tsoil sensor is bad. Too warm.
SONICS: No heaters cycling. Wind data looks good.
RADIOMETERS: OK, except outgoing case and dome at maui running slightly higher
than incoming case and dome temperatures.
T/RH: OK.
LEVELS, COMPASS: Maui y level 1.3 degrees out of level. Rest OK.
VOLTAGES:
Atl: teg volt. >15 V; bat: 14 V
icharge: 2 A ; iload: 1.2 A, TEG temp. 29
Maui: teg: 13.5- 14.5 v; bat:13-14 v
icharge:>2 A; iload: 1.2 A, TEG temp. 34
Bal: teg: 13-14.5 V; bat: 13-14 V
icharge: >2 A; iload: 1.6 A, TEG temp. 40
Fla: teg:13.5-14 V; bat:13.2-14 V
icharge: > 2 A; iload:1.7 A, TEG temp. 28
LEADS: No change.
WATER PONDS: Slowly increasing in number and size.
- 577: Daily_Status, Site all, Mon 13-Jul-1998 09:31:20 AKDT, Daily_Status
7/11/98 1600 - 7/13/98 1600 GMT
CURRENT WEATHER:NW winds 2m/s, overcast, vis 5km
temperature 0C at 08:00 am local time; pressure 1025.0 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is OK.
Atlanta is OK
Maui: Tsoil sensor is bad. Too warm.
SONICS: Heators on 2 times at Balt. and Maui. Wind data looks good except
When heaters came on.
RADIOMETERS: OK, except outgoing case and dome at maui running up to 1.3
degrees higher than incoming case and dome temperatures.
T/RH: OK.
LEVELS, COMPASS: Maui y level 1.4 degrees out of level. Balt. x level right at
1 degree out of level. Rest OK.
VOLTAGES:
Atl: teg volt. >15 V; bat: 14.2 V
icharge: 2 A ; iload: 1.1 A, TEG temp. 36
Maui: teg: 13.5- 14 v; bat:13-14 v
icharge:1.6 A; iload: 1.2 A, TEG temp. 40
Bal: teg: 13-14 V; bat: 13-14 V
icharge: >2 A; iload: 1.6 A, TEG temp. 42
Fla: teg:13.5-14 V; bat:13.2-14 V
icharge: > 2 A; iload:1.7 A, TEG temp. 38
LEADS: No change.
WATER PONDS: Slowly increasing in number and size.
- 578: Daily_Status, Site all, Tue 14-Jul-1998 09:02:23 AKDT, Daily_Status
7/13/98 1600 - 7/14/98 1600 GMT
CURRENT WEATHER:NW winds 2m/s, overcast, vis 2km
temperature -1C at 08:00 am local time; pressure 1018.0 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is OK.
Atlanta is OK
Maui: Tsoil sensor is bad. Tcase & Tdome out running high
SONICS: Heators on 3 times at all. Wind data looks good except
When heaters came on.
RADIOMETERS: OK, except outgoing case and dome at maui running up to 2
degrees higher than incoming case and dome temperatures.
T/RH: OK.
LEVELS, COMPASS: Maui y level 1.4 degrees out of level. Balt. Y level right at
1 degree out of level. Rest OK.
VOLTAGES:
Atl: teg volt. >15 V; bat: 13.5 - 14.5 V
icharge: >2 A ; iload: 1.1 A, TEG temp. 25 - 35
Maui: teg: 13.5- 14.5 v; bat:13.5-14.5 v
icharge:1.6- >2 A; iload: 1.2 A, TEG temp. 35
Bal: teg: 13-14 V; bat: 13-14 V
icharge: >2 A; iload: 1.6 A, TEG temp. 30-45
Fla: teg:13.5-14 V; bat:13-13.5 V
icharge: > 2 A; iload:1.7 A, TEG temp. 38
LEADS: No change.
WATER PONDS: Slowly increasing in number and size.
- 579: Visit_Log, Site 2, Tue 14-Jul-1998 21:52:19 AKDT, Site visit Maui
Site visit to maui 7/14/98
Site visit to reset radiometer levels at maui -- Maui's y level
seems stuck at 2.5. Only the hundredths digit changed, no matter how
much radiometer was moved. Maui is now level with buble level. Fixed
fans on both of the down looking radiometers.
All else looks well.
- 580: Visit_Log, Site 1, Tue 14-Jul-1998 22:02:44 AKDT, Site visit Alanta
Site visit Alanta
Fixed problem with flash card. All else is well.
- 581: Daily_Status, Site all, Wed 15-Jul-1998 08:41:31 AKDT, Daily_Status
7/15/98 1600 - 7/15/98 1600 GMT
CURRENT WEATHER:NW winds 2m/s, overcast, vis 2km
temperature -1.5C at 08:00 am local time; pressure 1015.0 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is OK.
Atlanta is OK
Maui: Tsoil sensor is bad.
SONICS: Heators at Alanta on 1 time at all. Wind data looks good.
RADIOMETERS: OK, Fixed fans on outgoing radiometers at Maui yesterday.
T/RH: OK.
LEVELS, COMPASS: Leveled Maui yesterday, Maui's Y level did not respond. Balt. Y level just above 1 degree out of level. Rest OK.
VOLTAGES:
Atl: teg volt. 14 ->15 V; bat: 14 V
icharge: >2 A ; iload: 1.1 A, TEG temp. 25 - 35
Maui: teg: 13.5- 14.5 v; bat:13-14 v
icharge:1.6- >2 A; iload: 1.2 - 1.6 A, TEG temp. 35 - 40
iload increased to 1.6 once fans were fixed.
Bal: teg: 13-14 V; bat: 13-14 V
icharge: >2 A; iload: 1.6 A, TEG temp. 25 - 40
Fla: teg:13.5-14.5 V; bat:13-14 V
icharge: > 2 A; iload:1.6 A, TEG temp. 35
LEADS: No change.
WATER PONDS: Slowly increasing in number and size.
- 582: Daily_Status, Site all, Thu 16-Jul-1998 08:50:11 AKDT, Daily_Status
7/15/98 1600 - 7/16/98 1600 GMT
CURRENT WEATHER:NW winds 2m/s, overcast, vis 3km
temperature -1.0C at 08:00 am local time; pressure 1017.0 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is OK.
Atlanta is OK
Maui: Tsoil sensor is bad.
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Maui's Y level not reding correctly. Balt. Y level above 1
degree out of level. Rest OK.
VOLTAGES:
Atl: teg volt. 14 - >15 V; bat: 13.5 - 14 V
icharge: >2 A ; iload: 1.1 A, TEG temp. 35
Maui: teg: 14 - 14.8 v; bat:13-14 v
icharge:1.6- >2 A; iload: 1.6 A, TEG temp. 38 - 42
Bal: teg: 13-14 V; bat: 13-14 V
icharge: 1.6 - >2 A; iload: 1.6 A, TEG temp. 30 - 34
Fla: teg:13.5-14.5 V; bat:13-13.5 V
icharge: 1.8 - > 2 A; iload:1.6 A, TEG temp. 28 - 35
LEADS: No change.
WATER PONDS: Slowly increasing in number and size.
- 583: Daily_Status, Site all, Fri 17-Jul-1998 09:13:19 AKDT, Daily_Status
7/16/98 1600 - 7/17/98 1600 GMT
CURRENT WEATHER:SW winds 1.2m/s, Partly Sunny, vis 5km
temperature -1.0C at 08:00 am local time; pressure 1019.0 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is OK.
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Balt. Y level is 1.5 degrees out of level.
degree out of level. Rest OK.
VOLTAGES:
Atl: teg volt. >15 V; bat: 14 V
icharge: 1.9 A ; iload: 1.1 A, TEG temp. 35-42
Maui: teg: 14 - 14.8 v; bat:13-14 v
icharge:1.8- >2 A; iload: 1.6 A, TEG temp. 38 - 42
Bal: teg: 13-15 V; bat: 13-14.5 V
icharge: >2 A; iload: 1.6 A, TEG temp. 25 - 40
Fla: teg:13.5-14.5 V; bat:13.2-14 V
icharge: > 2 A; iload:1.6 A, TEG temp. 28 - 40
LEADS: No change.
WATER PONDS: Slowly increasing in number and size.
- 584: Daily_Status, Site all, Sat 18-Jul-1998 09:12:05 AKDT, Daily_Status
7/17/98 1600 - 7/18/98 1600 GMT
CURRENT WEATHER:SE winds 3m/s, mostly cloudy, vis 5km
temperature - .5C at 08:00 am local time; pressure 1020.5 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida Tsoil is high, may be seeing Solar Radiation.
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Balt. Y level is 1.8 degrees out of level.
Rest OK. (Visit to Balt. planned for Monday.)
VOLTAGES:
Atl: teg volt. 13.5 - >15 V; bat: 13.5 - 14 V
icharge: 1.9 A ; iload: 1.1 A, TEG temp. 38-46
Maui: teg: 13.5 - 14.8 v; bat:13-14 v
icharge:1.6- >2 A; iload: 1.6 A, TEG temp. 38 - 46
Bal: teg: 13- >15 V; bat: 13-14.2 V
icharge: 1.6- >2 A; iload: 1.6 A, TEG temp. 32 - 42
Fla: teg:13.5- >15 V; bat:13-13.5 V
icharge:1.8- > 2 A; iload:1.6 A, TEG temp. 32 - 46
LEADS: No change.
WATER PONDS: Slowly increasing in number and size.
- 585: Visit_Log, Site 4, Sun 19-Jul-1998 12:54:59 AKDT, Site visit Florida
Site visit Florida -- July 18, 1998
Repositioned Tsoil. Teg box is sliding down hill. will visit on
July 19th with Dean and company to reposition and stake Teg box down.
- 586: Daily_Status, Site all, Sun 19-Jul-1998 12:58:36 AKDT, Daily_Status
7/18/98 1600 - 7/19/98 1600 GMT
CURRENT WEATHER:Light and variable, mostly cloudy, vis 5km
temperature + .5C at 08:00 am local time; pressure 1021.3 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is ok
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad, One bad spike in
the many data parameters just before 0800 local.
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Balt. Y level is 1.9 degrees out of level.
Rest OK. (Visit to Balt. planned for Monday.)
VOLTAGES:
Atl: teg volt. 13.5 - >15 V; bat: 13.5 - 14 V
icharge: 1.9 A ; iload: 1.1 A, TEG temp. 35-42
Maui: teg: 14 v; bat:13.5 v
icharge:1.6- >2 A; iload: 1.6 A, TEG temp. 38 - 40
Bal: teg: 13.5 V; bat: 13.5 V
icharge: 1.6- >2 A; iload: 1.6 A, TEG temp. 32 - 42
Fla: teg:13.5 V; bat:14-14.5 V
icharge:1.8- > 2 A; iload:1.6 A, TEG temp. 30 - 40
LEADS: No change.
WATER PONDS: Slowly increasing in number and size.
- 587: Visit_Log, Site 4, Sun 19-Jul-1998 17:46:46 AKDT, Site visit Florida
Site visit Florida -- July 19, 1998
Repositioned Teg box, and stabilized it with blocking and stakes.
- 588: Daily_Status, Site all, Mon 20-Jul-1998 07:20:21 AKDT, Daily_Status
7/19/98 1600 - 7/20/98 1600 GMT
CURRENT WEATHER:Southerly winds at 4 m/s, scattered clouds, with very light fog. Good visibility. Temperature + 1.5C at 08:00 am local time; pressure 1019.9 mb.
BASE: pampoll working. SHEBOP up
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is ok
Atlanta is OK One Spike at 0230 UTC affecting many parameters.
Maui: Tsoil sensor is bad, Y level sensor is bad,
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Balt. Y level is 1.9 degrees out of level.
Rest OK. (Visit to Balt. planned for today.)
VOLTAGES:
Atl: teg volt. 14.0 - >15 V; bat: 13.5 - 14.9 V
icharge: 2.0 A ; iload: 1.0 A, TEG temp. 40-42
Maui: teg: 13.7-14.2 v; bat:13.0-13.7 v
icharge:1.6- >2 A; iload: 1.55 A, TEG temp. 42
Bal: teg: 13.0-13.8 V; bat: 13.0-13.8 V
icharge: 1.7- >2 A; iload: 1.6 A, TEG temp. 31
Fla: teg:13.6-14.4 V; bat:13.0-13.5 V
icharge:1.8- > 2 A; iload:1.6 A, TEG temp. 34
LEADS: No change.
WATER PONDS: Slowly increasing in number and size and depth.
- 589: Daily_Status, Site all, Tue 21-Jul-1998 14:39:22 AKDT, Daily_Status
7/20/98 1600 - 7/21/98 1600 GMT
CURRENT WEATHER:Southerly winds at 3 m/s, Fog, visibility 0.5km. Temperature
+ 0C at 08:00 am local time; pressure 1020.9 mb.
BASE: pampoll working. SHEBOP up. Problem with Pampole overnight,`
rebooted pampoll computer, all missing data transmitted.
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is ok
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad, One bad spike in many
parameters at 1900.
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Balt. now level. Rest OK.
VOLTAGES:
Atl: teg volt. 13.5 - >15 V; bat: 12.5 - 13.5 V
icharge: 2.0 A ; iload: 1.1 A, TEG temp. 35-48
Maui: teg: 14.5 v; bat:13.5 v
icharge:1.6- >2 A; iload: 1.6 A, TEG temp. 35-45
Bal: teg: 13.0- >15V; bat: 13.5-14.5 V
icharge: 1.6- >2 A; iload: 1.6 A, TEG temp. 25-35
Fla: teg:13.6-15 V; bat: 13.5 V
icharge:1.8- > 2 A; iload: 1.6 A, TEG temp. 34
LEADS: No change.
WATER PONDS: Slowly increasing in number and size and depth.
- 590: Daily_Status, Site all, Wed 22-Jul-1998 08:29:04 AKDT, Daily_Status
7/21/98 1600 - 7/22/98 1600 GMT
CURRENT WEATHER:3 m/s/140 deg. Light fog. Temperature + 0.6 C at 08:00 am local time; pressure=1021.9 mb.
BASE: Pampoll down yesterday, but rebooted. OK now. All missing data
transmitted.
STATIONS: Atl: up
Mau: Up
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is ok
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK. Three heater cycles at Atl in fog.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK.
VOLTAGES:
Atl: teg volt. 13.4 - >15 V; bat: 13.3 - 14.1 V
icharge: 1.9 A ; iload: 0.9-1.0 A, TEG temp.20-35
Maui: teg: 13.2-14.3 v; bat:12.9-13.7 v
icharge:1.55- >2 A; iload: 1.55 A, TEG temp. 35-40
Bal: teg: 13.1- >15V; bat: 13.0-14.2 V
icharge: 1.65- >2 A; iload: 1.6 A, TEG temp. 27-32
Fla: teg:13.5-14.8 V; bat: 13.0-13.7 V
icharge:1.75- > 2 A; iload: 1.-1.7 A, TEG temp. 28-33
LEADS: No change.
WATER PONDS: Slowly increasing in number and size and depth.
- 591: Visit_Log, Site 3, Wed 22-Jul-1998 09:02:40 AKDT, Site visit Baltimore
Site visit Baltimore -- July 20, 1998, 2130-2300 UTC
Put supports under sled plywood base, which is in a meltpond. Tripod
leg bases are also in meltpond of their own making. Raised the two legs on the sonic side by putting 4x4s under the plywood pads, raising them out of the
water, and extending the legs. This leveled the sonic arm. Radiometers were
then leveled.
The Gsoil was oriented at a 45 degree angle and the Tsoil had worked its way
into the ice about 6-7 cm. Both were repositioned at the surface, covered with a thin layer of granular ice. Gsoil had dot facing up.
Propane tanks and flashcard were swapped.
Drain hole in sled meltpond showed about 105 cm of ice under sled, so no
immediate danger of melting through.
- 592: Visit_Log, Site 1, Wed 22-Jul-1998 09:45:44 AKDT, Site visit Atlanta
Site visit Atlanta -- July 21, 1998, 1845-1945 UTC
Moderate-dense fog, light-moderate wind.
Put 6x6 supports under sled plywood base, which is in a meltpond.
Moved sled a little to the east on plywood to level the sled better. There is
a narrow ice hummock under the plywood causing a bulge in it. All sled skis areout of the water.
Both the Gsoil and Tsoil are in cavities under the ice/snow. The Tsoil cavity
is waterfilled, though the Gsoil cavity may not be. Tsoil sensor displaced and then replaced in its cavity. Uncertain whether Gsoil sensor level or not since the plate isn't visible (probably unlikely considering that the other sites havefrequently been tilted, but it was decided not to disturb it. Photos taken of
Tsoil and Gsoil cavities.
The radiometers had fog/water drops on all domes, with more on the upward
facing ones. Radiometers were cleaned and leveled. Note that there is still coarse-grained snow under the radiometers and not ice. This makes the albedo somewhat unrepresentative of the area (e.g., higher than surrounding area).
Photographs taken of the site.
The sonics had duct tape flaps hanging from the heads and flapping at about 1-2 Hz in the wind(the tape holding the heaters on). Uncertain whether this would affect the data, but the flaps were trimmed off and water/fog drops were wiped
off the heads. Photo taken of sonic heads before duct tape trimmed.
Propane tanks and flashcard were swapped.
Heights:
Sonic arm centerline to ice surface: 287 cm
Downward looking radiometer domes to ice surface: 187 cm
Orientations: Sonic arm: 80 deg T (22.5 deg decl.)
Compass arm: 350 deg T
Radiometer arm: 270 deg T
NOTE: Kerry made these measurements with the handheld compass. We found out a
few days earlier that something in Ola's clothing (the bib overalls?) may
affect his compass readings.
Probably last time this site will be visited by snowmobile. Going through
meltponds is too rough on the machines (and people).
- 593: Daily_Status, Site all, Thu 23-Jul-1998 08:50:43 AKDT, Daily_Status
7/22/98 1600 - 7/23/98 1600 GMT
CURRENT WEATHER:3.8 m/s SE Light fog.Temperature + 0.3 C at 08:00 am local time; pressure=1017.5 mb.
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: Up. We watched a Polar Bear visit Maui from the bridge.
He looked at tripod then moved on.
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is ok
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK. Many heating cycles at Maui, in fog. Data looks ok.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK.
VOLTAGES:
Atl: teg volt. 13.4 - >15 V; bat: 13.5 - 14.1 V
icharge: 1.9 A ; iload: 0.9 A, TEG temp.30-35
Maui: teg: 13.4-14.8 v; bat:13.2-14 v
icharge:1.6 - >2 A; iload: 1.6 - 1.9 A, TEG temp. 30-35
Bal: teg: 12 - >14V; bat: 12.-14 V
icharge: 1.6- >2 A; iload: 1.6 A, TEG temp. 24-28
Fla: teg:13.5-14.8 V; bat: 12.5-14 V
icharge:1.8- > 2 A; iload: 1.6 A, TEG temp. 20-24
LEADS: No change.
WATER PONDS: Slowly increasing in number and size and depth.
- 594: Daily_Status, Site all, Fri 24-Jul-1998 09:01:02 AKDT, Daily_Status
7/23/98 1600 - 7/24/98 1600 GMT
CURRENT WEATHER:1 m/s SE partly cloudy.Temperature + 0.4 C at 08:00 am local
time; pressure=1018.7 mb.
BASE: Pampoll up -- Pampoll lost network connection yesterday afternoon.
reset pampoll this morning, all data now at Shebop.
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is ok
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK. Both Alanta and maui have many spikes down to 96%. Will keep
an eye on this.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK. (Alanta's x 0.8 degrees out of level, may
go and check it today.)
VOLTAGES:
Atl: teg volt. 13.4 - >15 V; bat: 13.5 - 14.1 V
icharge: 1.9 A ; iload: 0.9 A, TEG temp.28-42
Maui: teg: 13.4-14.8 v; bat:12.8-14 v
icharge:1.6 - >2 A; iload: 1.6 - >2 A, TEG temp. 15-41
Bal: teg: 13 - 14V; bat: 13-14 V
icharge: 1.6- >2 A; iload: 1.6 A, TEG temp. 25-35
Fla: teg:13.5-14.5 V; bat: 12-14.3 V
icharge:1.8- > 2 A; iload: 1.6 A, TEG temp. 25-34
LEADS: No change.
WATER PONDS: Slowly increasing in number and size and depth.
- 595: Visit_Log, Site 2, Sat 25-Jul-1998 08:20:56 AKDT, Site visit Maui
Site visit Maui -- July 23, 1998, 2230-2330 UTC
Moderate-dense fog, light wind.
Sled on 3ft high pedestal which has become shorter and narrower than theplywood under the sled. Sled tipping precariously on arrival. Moved plywood
and sled over center of pedestal, and will return with material to stake sled
and plywood to pedestal and protect the sides of the pedestal. Meltponds cover
70% of area around Maui, including entire area between sled and tripod. However, radiometers looking at only substantial piece of white ice near tripod, so will only be seeing the meltponds out at larger angles to the vertical. Likely
means that the albedo measurements are unrepresentative of the area. Tripod legs starting to get pedestals under them, making radiometer cantilever arm tilting sharply away from main tripod. Photos taken of site.
Both the Gsoil and Tsoil have melted down into narrow crevices in the ice. Couldn`t see either one, so don't know if the flux plate was tilted or not. Did not dig them out, since we didn't have an ice axe and I didn't want to risk
damaging them with a coarser tool. Photos taken of Tsoil and Gsoil crevices.
The radiometers had fog/water drops on all domes, with more on the upward
facing ones. Radiometer cantilever legs were adjusted so arm wasn't tilted, and radiometers then leveled and cleaned. The rest of the cantilever footpads were screwed into the underlying plywood.
Propane tanks and flashcard were swapped.
Heights:
Sonic arm centerline to ice surface: 324 cm
Downward looking radiometer domes to ice surface: 229 cm
Orientations: Sonic arm: 39 deg T (22.5 deg decl.)
Compass arm: 129 deg T
Radiometer arm: 224 deg T
NOTE: Many bear tracks around site. The bear was observed by many people (including myself) to go up to the Maui site on the evening of July 22, sniff and inspect the tripod, and then decide to move on as Dean, Paul, and Matt approached with snowmobiles. The bear did not appear to touch anything, and there was no
evidence that it had.
- 596: Daily_Status, Site all, Sun 26-Jul-1998 21:26:04 AKDT, Daily_Status
7/25/98 1600 - 7/26/98 1600 GMT
CURRENT WEATHER:4 m/s S partly cloudy.Temperature + 0.6 C at 08:00 am local
time; pressure=1016.8 mb.
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is ok
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK, except Fla. Y 1.1 degrees out of level. Visit
scheduled for today.
VOLTAGES:
Atl: teg volt. 14.5 - >15 V; bat: 13.9 V
icharge: >2.0 A ; iload: 0.9 A, TEG temp.34-45
Maui: teg: 13.4-14.5 v; bat:12.8-14 v
icharge:1.8 - >2 A; iload: 1.6 A, TEG temp. 40-45
Bal: teg: 13.5 - >15V; bat: 13.5-14.5 V
icharge: >2 A; iload: 1.6 A, TEG temp. 33-43
Fla: teg:14 - >15 V; bat: 13.5 V
icharge:> 2 A; iload: 1.6 A, TEG temp. 33-45
LEADS: No change.
WATER PONDS: Slowly increasing in number and size and depth.
- 597: Visit_Log, Site 2, Sun 26-Jul-1998 21:35:57 AKDT, Site visit Maui
Site visit Maui -- July 24, 1998
Repositioned Teg box, and stabilized Teg box and platform with stakes
and rope. Placed white cloth around platform to protect further erosion
of piller.
- 598: Visit_Log, Site 1, Sun 26-Jul-1998 21:39:41 AKDT, Site visit Alanta
Site visit Alanta -- July 24, 1998
Leveled Alanta Radiometer. Teg box on slight tilt. Plan is to
stake box in same way that Florida is staked. Probably trip to Alanta
tomorrow.
Update -- July 26, 1998
Atempt to visit Alanta and Stake teg box aborted by increasing
melt ponds, making it imposible to get to by snowmobile. May attempt by
Helo later this week.
- 599: Visit_Log, Site 4, Sun 26-Jul-1998 21:48:58 AKDT, Site visit Florida
Site visit Florida -- July 26, 1998, 1030-1130 local
Overcast, moderate wind.
Teg box stabilization is working fine. Changed Propane, flashcard,
and Teg nozzle.
Both the Gsoil and Tsoil are on top of the ice. G-Soil is Horz. in cavities under the ice/snow. The Tsoil cavity
Attempted to level radiometers. Could not get a better y-level due to frozen
screw.
Heights:
Downward looking radiometer domes to ice surface: 187 cm
Orientations: Sonic arm: 355 deg T (22.5 deg decl.)
Compass arm: 80 deg T
Radiometer arm: 180 deg T
- 600: Daily_Status, Site all, Mon 27-Jul-1998 08:58:34 AKDT, Daily_Status
7/26/98 1600 - 7/27/98 1600 GMT
CURRENT WEATHER:3 m/s W Fog.Temperature + 0.2 C at 08:00 am local
time; pressure=1009.0 mb. Rain fell from 1500 - 2000 and off and on
from 2000 - 0100
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is ok
Atlanta is OK, See below for problems during last 24 hours.
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK. Many heater cycles at Alanta during period from 1600 - 2100.
W has spikes during this time.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK, except Fla. Y 1.1 degrees out of level. Can not
adjust Fla. any better due to frozen adjustment screw.
Compass at Alanta has many spikes from 1600 - 2100, same
time that heaters were on.
VOLTAGES:
Atl: teg volt. 13 - >15 V; bat: 13 - 14.5 V
icharge: 0.9 - >2.0 A ; iload: 0.5 - 1.5 A, TEG temp.20-40
Maui: teg: 13-14.5 v; bat:13-13.5 v
icharge:1.6 - >2 A; iload: 1.6 A, TEG temp. 35-40
Bal: teg: 13 - >14.5V; bat: 13-14.5 V
icharge: 1.2 - >2 A; iload: 1.6 A, TEG temp. 20-33
Fla: teg:13 - 14.5 V; bat: 13-14 V
icharge:1.8 - > 2 A; iload: 1.6 - 2 A, TEG temp. 10-32
LEADS: No change.
WATER PONDS: Slowly increasing in number and size and depth.
- 601: Daily_Status, Site all, Tue 28-Jul-1998 08:39:22 AKDT, Daily_Status
7/27/98 1600 - 7/28/98 1600 GMT
CURRENT WEATHER:7 m/s SW Overcast.Temperature + 1.5 C at 08:00 am local
time; pressure=1008.0 mb.
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: up
DATA:
Baltimore is OK; One spike at 2000 GMT in many parameters.
Florida is ok
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK, except Fla. Y 1.2 degrees out of level. Can not
adjust Fla. any better due to frozen adjustment screw.
VOLTAGES:
Atl: teg volt. 14 - >15 V; bat: 14 - 14.5 V
icharge: 1.8 - 2.0 A ; iload: 1 - 1.5 A, TEG temp.15-25
Maui: teg: 13.5-14.5 v; bat:13-14 v
icharge:1.6 - >2 A; iload: 1.6 - 2 A, TEG temp. 25-40
Bal: teg: 13 - >15 V; bat: 13-14 V
icharge: 1 - >2 A; iload: 1.6 A, TEG temp. 25-33
Fla: teg:13 - 14.8 V; bat: 13-14 V
icharge:1.9 - > 2 A; iload: 1.6 A, TEG temp. 20-32
LEADS: No change.
WATER PONDS: Slowly increasing in number and size and depth.
- 602: Daily_Status, Site all, Wed 29-Jul-1998 08:52:49 AKDT, Daily_Status
7/28/98 1600 - 7/29/98 1600 GMT
CURRENT WEATHER:11 m/s W Overcast.Temperature -0.2 C at 08:00 am local
time; pressure=998.6 mb. Wind Chill -23 C.
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: up
DATA:
Baltimore is OK;
Florida is ok
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad.
Note that Tsoil sensors showed below freezing values at Bal & Fla. ALso,
with the onset of the colder temperatures, Gsoil changed signs compared to last couple of weeks.
SONICS: OK. Heaters came on at all except Fla - during precip yesterday
afternoon.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK, except Fla. Both x&y out of level - took big jump
about 09 UTC. Bal x-level also jumped at same time, but still within 1 deg
limit.
VOLTAGES:
Atl: teg volt. 14.1 - >15 V; bat: 14.1 - 14.5 V
icharge: 1.8 - 1.95 A ; iload:0.8 - 1.4 A, TEG temp.4-25
Maui: teg: 13.2-13.8 v; bat:13-13.5 v
icharge:1.6 - 2 A; iload: 1.55 A, TEG temp. 25-40
Bal: teg: 14 - >14.1 V; bat: 14.0-14.1 V
icharge: 1 - 1.6 A; iload: 1.45-1.9 A, TEG temp. 18-24
Fla: teg:13.5 - 14.5 V; bat: 13.1-14 V
icharge:> 2 A; iload: 1.6-1.7 A, TEG temp. 14-20
LEADS: Well-mixed, frazzle ice.
WATER PONDS: Frazzle ice on meltponds.
- 603: Visit_Log, Site 1, Wed 29-Jul-1998 09:19:20 AKDT, Site visit Atlanta
Site visit Atlanta -- July 28, 1998, 22-23 UTC
Overcast, some sleet, snow. Moderate - strong wind.
Raised plywood sled platform further out of meltpond and leveled it by putting
6x6 and 4x4's under one corner. Anchored sled by tying it to a post put into
the ice.
Both the Gsoil and Tsoil are under the ice and are not visible.
Leveled radiometers-only minor adjustment needed.
- 604: Visit_Log, Site 4, Wed 29-Jul-1998 21:31:47 AKDT, Site visit Florida
Site visit Florida -- July 29, 1998,0300-0430 UTC
Note added 3/29/99 by TWH:
This appears to have occurred on July 30, 0300-0430 UTC
Overcast, strong winds, snow flurries, T=-0.5 C (Summer has come to a screeching halt!!--at least for now)
Needed to move tripod and cantilever 2.5 feet north so feet didn't slide down
pedestal. Screwed feet onto plywood ablation shield, and staked cantilever feetto ice. When moving radiometer arm it bent downwards, putting permanent kink inaluminum arm. Additional support then provided for arm by placing guy wire fromend of arm to top of tripod.
Both the Gsoil and Tsoil were on top of the ice and the former level, but they
had to be moved in order to move cantilever arm. Tsoil and Gsoil plate
repositioned with latter having white dot facing upwards.
Radiometers leveled using thumbscrew on one side and wedge of wood on the side
of the frozen adjustment screw.
Heights:
Downward looking radiometer domes to ice surface: 196 cm
Sonic arm centerline to ice surface: 293 cm (Height of Gill sonic must still be added. I couldn't reach to measure it with the tape measure because of the strong winds.
Orientations: Sonic arm: 14 deg T (22.5 deg decl.)
Compass arm: 94 deg T
Radiometer arm: 190 deg T
- 605: Daily_Status, Site all, Fri 31-Jul-1998 08:35:09 AKDT, Daily_Status
7/29/98 1600 - 7/30/98 1600 GMT
CURRENT WEATHER:5 m/s SW Overcast.Temperature -0.5 C at 08:00 am local
time; pressure=999.6 mb.
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: up
DATA:
Baltimore is OK;
Florida is ok
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK. Many heater cycles at all except Fla.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK, except Maui -- Maui X level jumped to >6 at 1600 GMT
(0800 local) yesterday.
VOLTAGES:
Atl: teg volt. 13.5 - 14.5 V; bat: 13.5 - 14.5 V
icharge: 1.5 - >2 A ; iload:1.0 - 1.5 A, TEG temp.7
Maui: teg: 13-14.5 v; bat:13-14 v
icharge:1.5 - 2 A; iload: 1.5 - 2 A, TEG temp. 25
Bal: teg: 13 - 14.5 V; bat: 13-14 V
icharge: 1 - 1.8 A; iload: 1.5-1.9 A, TEG temp. 20
Fla: teg:13.5 - 14.5 V; bat: 13-14 V
icharge:1.8 -> 2 A; iload: 1.4-1.6 A, TEG temp. 18
LEADS: Quebec lead opened up -- Lead beyond Alanta has opened up.
WATER PONDS:
- 606: Visit_Log, Site 3, Fri 31-Jul-1998 10:09:56 AKDT, Site visit Baltimore
Site visit Baltimore -- July 30, 1998, 1730 - 1900 UTC
High albedo at site today as a coating of light snow covers area, slush
ice on all of the melt ponds. Tripod and TEG look good, TEG staying above the
melt pond that it is in. Back legs of tripod staying above the melt ponds
that formed around them.
Tsoil and Gsoil not visible, probably 4cm to 9cm deep, covered by small
snow drift, induced by leg of radiometer stand.
Propane tanks, TEG nozzle, and flashcard were swapped.
Drain hole in sled meltpond showed about 90 cm of ice and melt pond surrounding
sled 40 cm deep; Sled sitting just above top of melt pond on 90 to 120 cm of
ice so no immediate danger of melting through.
Heights: Radiometers 176 cm
Sonic 297 cm
Directions:
Compass arm 155d true (compass dec 22.5d)
Sonic arm 68d true
Radiometer arm 239d true
6/1/99 email from Ola Persson:
For Baltimore, my personal logbook states that the radiometers were leveled
on July 30 near 1800 UTC. Sorry for neglecting to include this in the
electronic log.
- 607: Visit_Log, Site 2, Fri 31-Jul-1998 10:30:06 AKDT, Site visit Maui
Site visit Maui -- July 30, 1998, 2130-2230 GMT
overcast, moderate wind.
Stopped at site on the way back from Baltimore at 1920 GMT. Site
visited due to change in x-level yesterday morning to >6d. Found
that both tripods had probably slipped forward, also found that radiometer
was missing its leveling marble. Returned in the afternoon, installed new
leveling marble and raised front leg of rad. tripod to level radiometers.
Both the Gsoil and Tsoil have melted down into narrow crevices in the ice. Did not try to did Tsoil out. Dug out Gsiol, it was oriented vertically at 40 cm
depth in wet blue ice. Wrapped Gsoil in foil, placed on ice with dot pointed
up under 1cm of corse grained snow/ice.
Propane tanks, TEG nozle, and flashcard were swapped.
Heights:
Sonic arm centerline to ice surface: 323 cm
Downward looking radiometer domes to ice surface: 242 cm
Orientations: Sonic arm: 45 deg T (compass set at 22.5d decl.)
Compass arm: 131 deg T
Radiometer arm: 228 deg T
- 608: Daily_Status, Site all, Fri 31-Jul-1998 10:49:21 AKDT, Daily_Status
7/30/98 1600 - 7/31/98 1600 GMT
CURRENT WEATHER: 7 m/s W Overcast with some breaks.Temperature -0.8 C at 08:00
am local time; pressure=999.4 mb and begining to rise.
BASE: Pampoll up -- pampoll went down at 0530 local, rebotted at 0900 local
all data restored.
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: up
DATA:
Baltimore is OK;
Florida is ok
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK. 2 to 3 heater cycles at all except Fla.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK, except Fla. -- Fla. X and Y levels jumped to 3 to 4
degrees at 0800 GMT (0000 local).
VOLTAGES:
Atl: teg volt. 13.5 - >15 V; bat: 13.5 - 14.5 V
icharge: 1.5 - 2 A ; iload:1.3 A, TEG temp.7
Maui: teg: 13-15 v; bat:13-14 v
icharge:1.5 - 2 A; iload: 1.6 A, TEG temp. 20 - 30
Bal: teg: 12.5 - 14 V; bat: 12.5-13.5 V
icharge: .8 - >2 A; iload: 1.6 A, TEG temp. 22
Fla: teg:14 - 15 V; bat: 13.5-14 V
icharge:1.8 -> 2 A; iload: 1.4 A, TEG temp. 18
LEADS: Lead beyond Alanta has opened up.
WATER PONDS:
- 609: Daily_Status, Site all, Sun 02-Aug-1998 09:08:47 AKDT, Daily_Status
7/31/98 1600 - 8/1/98 1600 GMT
CURRENT WEATHER: 5 - 6 m/s W clear.Temperature -2.0 C at 08:00
am local time; pressure=1001.0 mb and going up.
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: up
DATA:
Baltimore is OK;
Florida is ok
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK. 2 to 3 heater cycles at all except Fla.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK, except Fla. -- Fla. X is just over 1 degree out.
VOLTAGES:
Atl: teg volt. 13 - >15 V; bat: 13 - 14.8 V
icharge: 1.6 - 2 A ; iload:1.2 - 1.6 A, TEG temp.7
Maui: teg: 13 - >15 v; bat:13-14 v
icharge:1.6 - >2 A; iload: 1.6 A, TEG temp. 15 - 25
Bal: teg: 13 - 15 V; bat: 13-14 V
icharge: 1.2 - >2 A; iload: 1.6 - 1.8 A, TEG temp. 22
Fla: teg:14 - 14.8 V; bat: 13.8-14.2 V
icharge:1.8 -> 2 A; iload: 1.4 A, TEG temp. 5-20
LEADS:
WATER PONDS: At 0800 local, small 100% ice cover, mediam 50 - 60% ice,
large 20 - 30% ice cover. Ice cover 1 - 3 cm thick.
- 610: Visit_Log, Site 4, Sun 02-Aug-1998 09:18:52 AKDT, Florida Site visit -- level radiometers.
07/31/98 1600 local
Attempt to level Florida, hampered by winds. Improved X level to +1
degree, Y level to <0.5 out.
08/01/98 1030 local
Leveled Florida with bubble level. (Using washers to shim under
leveling screw that is frozen.) After leveling with bubble level we have
new offsets for the electronic level. New offsets are x = 0.40, y = 0.23.
- 611: Daily_Status, Site all, Sun 02-Aug-1998 11:25:03 AKDT, Daily_Status
8/1/98 1600 - 8/2/98 1600 GMT
CURRENT WEATHER: 4 m/s W overcast. Temperature -1.8 C at 08:00
am local time; pressure=1001.2 mb.
BASE: Pampoll Was down since 1830 local (0230 GMT). Had to reboot Pampoll
3 times to bring back up. Data from Balt. and Maui recovered. Data
gap left in Florida from 1830 - 2130 local (0230 - 0530 GMT). Data
gap in Tplat, Tthrm, Rh, compass at Atlanta from 1900 - 1000 local
(0300 - 1800 GMT).
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: up
DATA:
Baltimore is OK;
Florida Data not transmitted 1830 - 2130 local. all else OK
Atlanta is Trouble with data reception 1900 - 1000 local (See
above for details).
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: All stations showing many short periods below 99% and some
short periods below 96%.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK, except Fla. -- Fla. leveled yesterday morning.
Fla. slipped back out of level between 2100 and 2200 local
last night.
LEVEL OFFSETS: Based on the buble level measurement, Fla. now has new
offsets, below is list of all offsets as they stand now:
Atlanta -0.90 0.22
Maui -0.15 0.86
Balt. 0.23 -0.10
Fla. 0.40 0.23
VOLTAGES:
Atl: teg volt. 13 - >15 V; bat: 13 - 14.8 V
icharge: 1.9 A ; iload:1.2 - 1.6 A, TEG temp. 10 - 15
Maui: teg: 13 - >15 v; bat:13-14.5 v
icharge:1.6 - 2 A; iload: 1.5 - 1.9A, TEG temp. 15 - 30
Bal: teg: 13 - >15 V; bat: 13-14.5 V
icharge: 1.8 - >2 A; iload: 1.5 A, TEG temp. 25 - 35
Fla: teg:14 - >15 V; bat: 13-14.7 V
icharge:1.8 -> 2 A; iload: 1.4 A, TEG temp. 5-20
LEADS:
WATER PONDS: At 0800 local, small 100% ice cover, mediam 50 - 60% ice,
large 20 - 30% ice cover. Ice cover 1 - 3 cm thick.
- 612: Visit_Log, Site 4, Sun 02-Aug-1998 17:25:51 AKDT, Florida Site visit -- level radiometers.
07/31/98 1600 local
Attempt to level Florida, hampered by winds. Improved X level to +1
degree, Y level to <0.5 out.
08/01/98 1030 local
Leveled Florida with bubble level. (Using washers to shim under
leveling screw that is frozen.) After leveling with bubble level we have
new offsets for the electronic level. New offsets are x = 0.40, y = 0.23.
08/02/98
Releveled Florida with bubble level. It had gone out of level over-
night. New offsets are x = 0.34, y = 0.01.
- 613: Daily_Status, Site all, Tue 04-Aug-1998 08:03:52 AKDT, Daily_Status
8/2/98 1600 - 8/3/98 1600 GMT
CURRENT WEATHER: 3-4 m/s NNW overcast. Temperature -1.5 C at 08:00
am local time; pressure=1008.5 mb.
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: up
DATA:
Baltimore is OK;
Florida is OK
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK, except Fla. -- Fla. leveled yesterday afternoon.
Fla. slipped back out of level between 2100 and 2200 local
last night, but is this true? Yesterday morning around
1000 local, Fla. levels recovered by themselves, and
when I leveled florida in the afternoon the manual
electronic "bubble" level showed Fla. to be less than
0.3 degrees off.
LEVEL OFFSETS: Based on the buble level measurement, Fla. now has new
offsets, below is list of all offsets as they stand now:
Atlanta -0.90 0.22
Maui -0.15 0.86
Balt. 0.23 -0.10
Fla. 0.34 0.01
VOLTAGES:
Atl: teg volt. 13 - >15 V; bat: 13 - 14.5 V
icharge: 1.8 - >2 A ; iload:1.2 - 1.4 A, TEG temp. 15 - 30
Maui: teg: 13 - 15 v; bat:13-14.5 v
icharge:1.6 - >2 A; iload: 1.4 - 2.0A, TEG temp. 20 - 35
Bal: teg: 13 - 15 V; bat: 13-14 V
icharge: 1.6 - >2 A; iload: 1.6 A, TEG temp. 30 - 40
Fla: teg:13.5 - 15 V; bat: 13-14.5 V
icharge:1.8 -> 2 A; iload: 1.4 - 1.6 A, TEG temp. 15-35
LEADS:
WATER PONDS: At 0800 local, small 100% ice cover, mediam to large
50 - 70% ice cover. Ice cover 2 - 3 cm thick.
- 614: Visit_Log, Site 1, Tue 04-Aug-1998 08:21:35 AKDT, Site visit Atlanta
Site visit Atlanta -- August 3, 1998, 1400 - 1530 local
Overcast, light-moderate wind, temperature -0.1.
Supports under sled box are doing fine.
Radiometers were cleaned and leveled.
Propane tanks, nozzle, and flashcard were swapped.
Heights:
Sonic arm centerline to ice surface: 292 cm
Downward looking radiometer domes to ice surface: 197 cm
Orientations: Sonic arm: 75 deg T (compass set at 22.5 deg decl.)
Compass arm: 165 deg T
Radiometer arm: 255 deg T
- 615: Daily_Status, Site all, Tue 04-Aug-1998 08:35:18 AKDT, Daily_Status
8/3/98 1600 - 8/4/98 1600 GMT
CURRENT WEATHER: 3 m/s SW overcast. Temperature -0.5 C at 08:00
am local time; pressure=1013.2 mb.
BASE: Pampoll up -- Data missing 1310-1410 local (2110-2210 GMT).
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: up
DATA:
Baltimore is OK;
Florida is OK
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK, Fla. levels recovered by themselves at around
1030 local.
VOLTAGES:
Atl: teg volt. 13 - >15 V; bat: 13 - 14.5 V
icharge: 1.6 - 2 A ; iload:0.9 - 1.2 A, TEG temp. 5 - 35
Maui: teg: 13 - 15 v; bat:13-14.5 v
icharge:1.6 - 2 A; iload: 1.6 - 1.9A, TEG temp. 25 - 40
Bal: teg: 13 - 14 V; bat: 13-14 V
icharge: 1.6 - >2 A; iload: 1.6 - 1.9A, TEG temp. 40
Fla: teg:14 - 14.5 V; bat: 13-13.5 V
icharge:1.8 -> 2 A; iload: 1.6 A, TEG temp. 40
LEADS: Lead behind Maui opened up (With in 75 m of Maui).
WATER PONDS:
- 616: Daily_Status, Site all, Wed 05-Aug-1998 09:11:03 AKDT, Daily_Status
8/4/98 1600 - 8/5/98 1600 GMT
CURRENT WEATHER: 4 m/s SW, FOG. Temperature -0.6 C at 08:00
am local time; pressure=1014.0 mb.
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: up
DATA:
Baltimore is OK;
Florida is OK
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad.
Balt. and Maui each have one spike in the data affecting many of the
parameters.
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: All OK
VOLTAGES:
Atl: teg volt. 13 - >15 V; bat: 13 - 14.5 V
icharge: 1.6 - 1.8 A ; iload:0.9 A, TEG temp. 15 - 20
Maui: teg: 13 - 14.5 v; bat:13-14 v
icharge:1.6 - >2 A; iload: 1.6 A, TEG temp. 35 - 40
Bal: teg: 13 - 14 V; bat: 13-14 V
icharge: 1.6 - >2 A; iload: 1.6A, TEG temp. 30-40
Fla: teg:13.5 - 14.5 V; bat: 13-14 V
icharge:1.8 -> 2 A; iload: 1.6 A, TEG temp. 25-35
LEADS: Lead behind Maui closed up during the day yesterday.
WATER PONDS:
- 617: Daily_Status, Site all, Fri 07-Aug-1998 09:08:27 AKDT, Daily_Status
8/6/98 1600 - 8/7/98 1600 GMT
CURRENT WEATHER: 6 m/s S, FOG. Temperature -2.3 C at 08:00
am local time; pressure=1005.2 mb.
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: Worked for 5 hours yesterday after fuse replaced, then stopped
DATA:
Baltimore is OK;
Florida not being received
Atlanta is OK
Maui: Tsoil sensor is bad, Y level sensor is bad. Effect of repositioning
radiometers over meltpond clearly noticeable. Showed periods of suspicious high winds yesterday-numerous heater cycles.
SONICS: Heaters at all stations going on several times at all stations, most
frequently at Maui.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Atl, Bal OK, Maui x right at tolerance, FLA needs to be
releveled
VOLTAGES:
Atl: teg volt. 13.2 - >15 V; bat: 13 - 14.5 V
icharge: 1.6 - 1.8 A ; iload:1.2 A, TEG temp. 20 - 24
Maui: teg: 13 - 14.2 v; bat:12.8-14 v
icharge:1.3 - >2 A; iload: 1.0-2.0 A, TEG temp. 25 - 27
Bal: teg: 12.9 - 15 V; bat: 12.9-14.2 V
icharge: 1.4 - >2 A; iload: 1.6A, TEG temp. 15-18
Fla: teg:13.2 - 13.4 V; bat: 13.1-13.3 V
icharge:1.6 -> 2 A; iload: 1.8->2 A, TEG temp.18
LEADS: Lead north of Florida and Maui opened wide yesterday and closed somewhat
last night. A wide lead was noted 100 m west of Baltimore, and has probably
been there a day or two
WATER PONDS: Getting slightly deeper, but the smaller ones are getting a thin
ice cover.
- 618: Visit_Log, Site 2, Sat 08-Aug-1998 15:12:55 AKDT, Site visit Maui
Site visit Maui -- August 6, 1998, 2200-00030 UTC
The radiometer tripod and arm were moved so the radiometers were over a
meltpond. The meltpond is about 7-8 m wide and about 10 times as long, with thelong axis running approximtaely E-W. The radiometer arm is oriented towards
210 deg T (22.5 deg decl.). The tripod is supported by two guy wires to anchors in the ice(through the ice in one case). The forward pad of the tripod is at
the meltpond edge, so this needs to be watched. The radiometer arm was not
extended (We were concerned about tipping, but perhaps we should have risked it and extended it a little further -- something to consider). The radiometer is
about 170 cm from the edge of the meltpond(i.e., the edge of the top of the ice -- the edge is undercut) and is 227 cm above the water surface. The edge of themeltpond is about 20 cm high, and the undercut is also about 20 cm. Using
T. Horst's formula, I estimate that 70-75% of the radiometer signal is from the
meltpond, with the remainder from the surrounding ice, ice edge and tripod legs.Leveling of the radiometers is a little tricky. We accomplished it by putting aladder in the meltpond. When the pond gets more frozen, it will be more
difficult until the ice is thick enough to stand on. The pond is 43 cm deep
(just below my boot tops) and had a thin layer of ice along its downwind (N)
edge today. We had 3 ponds to choose from without moving the sled. This one
was chosen because 1) it had a dark-blue color, which was the most
representative in the area. The other ones were a) azure blue and smaller and b)larger and almost black with most of the bottom melted through to the ocean.
The latter would have been impossible to level and the former will likely freezesolid first and will therefore be less interesting.
The foil-covered Gsoil plate was put on top of the ice 54 cm from the edge of
the pond and covered with about 1 cm of coarse-grained ice granules. The dot
was facing upwards.
Heights:
Sonic arm centerline to ice surface: not measured
Downward looking radiometer domes to water surface: 227 cm
Orientations: Sonic arm: not measured
Compass arm: not measured
Radiometer arm: 210 deg T (22.5 deg decl.)
The hand-held Vaisala wand was inserted in the PAM aspirator tube for several
minutes. It gave a reading of T = -0.5 deg C and RH=92.6% at 0025-0030 UTC
August 7.
Photographs were taken of the radiometer installation and the meltpond.
- 619: Visit_Log, Site 4, Sat 08-Aug-1998 15:52:33 AKDT, Florida Site visit -- level radiometers, replace fuse.
980807 900-1945 UTC
Clear, light dusting of snow.
Replaced blown 5A fuse. Raised radiometer tripod legs and leveled
radiometers. Spiked tripod feet to ice, since they tended to slide. Because
power had been off, everything was iced up. We did not try to clean off the
sonic heads, but did clean off the radiometers. Gsoil and Tsoil had melted down 5 cm into the ice. Gsoil was horizontal. They were dug up and placed on the
surface and covered with 1 cm of ice granules.
Vaisala wand inserted in aspirator tube at 1955-2001 UTC. It gave readings of: T=-0.4 deg C, RH=88.0%
Good agreement with station data.
One photo taken of radiometers towards the east.
- 620: Visit_Log, Site 2, Sat 08-Aug-1998 16:01:20 AKDT, Site visit Maui
Site visit Maui -- August 7, 1998, 2300-2359 UTC
Front leg of radiometer tripod raised one notch. Radiometers leveled.
Radiometer tripod foot pads were spiked to the ice.
- 621: Daily_Status, Site all, Sat 08-Aug-1998 16:55:41 AKDT, Daily_Status
8/7/98 1600 - 8/8/98 1600 GMT
CURRENT WEATHER: 6 m/s SSE, FOG. Temperature +0.5 C at 08:00
am local time; pressure=1001.5 mb.
BASE: Pampoll down
Shebop up
STATIONS: Atl: Stuck in transmitting TRH line.
Mau: Up.
Bal: up
Fla: up
Pampoll had stopped passing data to Shebop at about 0530 local. Pampoll was
locked up so I had to reboot. After reboot, pampoll locked up again so I had
to reboot a second time. Balt., Fla., and Maui caught up to 0900 local on the
Shebop graphs, however found that pampoll was locked up at 1300 local (aug. 8)
and that
none of the graphs had been updated in Shebop since 0900 local. Rebooted
pampoll, maui caught up to 1330, and Fla. started data at 1330. Balt. and
Atlanta did not respond. (Both Fla. and Maui stopped updating to Shebop at
1530 local.) Tried to sign on to stations from Pampoll, the minuite that I
typed eve_console , I started getting lines of data scrolling by that
began with TRH003. After some detective work I tracked this problem down to
the fact that Alanta was stuck in some kind of transmit mode transmitting this
TRH line, therefore not letting any of the stations to transmitt back to Pam
poll. Went to Alanta this evening (aug. 8) and rebooted eve. Alanta stopped
transmitting this TRH line and all other stations have started reporting.
Snow Surface: Temperatures rose overnight, snow/ice surface has softened up
conciderably overnight.
LEADS: Lead north of Florida stayed opened wide yesterday and lead near Maui closed somewhat.
WATER PONDS: Getting slightly wider overnight with the warmer temepratures.
Most melt ponds have lost their thin ice cover.
- 622: Visit_Log, Site 1, Sat 08-Aug-1998 22:51:15 AKDT, Site visit Atlanta -- transmitting error
Site visit Atlanta -- August 8, 1998, 1900 - 2000 local
Fog, light-moderate wind, temperature +0.1.
Alanta has been transmitting TRH003 line back to ship continously.
Rebooted EVE. Alanta began to transmit normally. Checked Flash card and`
found that flash card files for jd 218,219,220, and 221 were missing. Copied
these files from eve to the flash card. Changed flash card.
Temperature check with visallia temperature wand. Hand held reports
temperature of .2C RH = 92.7. Alanta shows t = .23, t2 = .10, and RH = 100.23.
- 623: Daily_Status, Site all, Sun 09-Aug-1998 13:31:40 AKDT, Daily_Status
8/8/98 1600 - 8/9/98 1600 GMT
CURRENT WEATHER: 1 m/s NE, Overcast. Temperature -0.5 C at 08:00
am local time; pressure=1005.8 mb.
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: Up
DATA:
Baltimore is OK;
Florida is OK. Fla. data missing 0900-1200 local and 1600-1900 local
This data not transmitted due to problem with Alanta's
continous transmission.
Atlanta is now OK. Problem with continous transmission of THR data from
Alanta yesterday, had to manually reboot EVE. Alanta missing
TRH data and compass data from 0500-1900 local.
Maui: Tsoil sensor is bad, Y level sensor is bad. Effect of repositioning
radiometers over meltpond clearly noticeable. Showed periods of suspicious high winds yesterday-numerous heater cycles.
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: OK
VOLTAGES:
Atl: teg volt. 13 - >15 V; bat: 13 - 14.5 V
icharge: 1.9 A ; iload: 1.1 A, TEG temp. 10 - 40
Maui: teg: 13.5 - 14 v; bat:13-13.5 v
icharge:1.9 - 2.5 A; iload: 1.6 A, TEG temp. 30 - 40
Bal: teg: 13-14 V; bat: 12.9-13.5 V
icharge: 1.6 - 2 A; iload: 1.5A, TEG temp. 20-40
Fla: teg:13 - 13.5 V; bat: 13-13.5 V
icharge:1.9 - 3 A; iload: 2 A, TEG temp.15 - 30
LEADS: Big lead open NW of Florida, Lead open E of Atlanta.
Maui Range and Bearing 1085m @ 046
Atl. Range and Bearing 1530m @ 060
Balt. Range and Bearing 5km est. @ 167
WATER PONDS:
- 624: Daily_Status, Site all, Mon 10-Aug-1998 08:41:23 AKDT, Daily_Status
8/9/98 1600 - 8/10/98 1600 GMT
CURRENT WEATHER: 4 m/s NE, FOG. Temperature +0.5 C at 08:00
am local time; pressure=1004.5 mb.
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: Up
DATA:
Baltimore is OK; Data Spike affecting many data parameters at 0400.
Florida is OK.
Atlanta is now OK.
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: OK
VOLTAGES:
Atl: teg volt. 13 - >15 V; bat: 13 - 14 V
icharge: 1.5 - 2 A ; iload: 1.1 A, TEG temp. 20 - 40
Maui: teg: 13 - 14 v; bat:13-14 v
icharge:1.6 - 2.5 A; iload: 1.6 A, TEG temp. 25 - 40
Bal: teg: 13-14 V; bat: 13-14 V
icharge: 1.6 - 3 A; iload: 1.6A, TEG temp. 20-35
Fla: teg:13 - 14 V; bat: 13-14 V
icharge:1.6 - 3 A; iload: 2 A, TEG temp.10 - 25
LEADS:
Maui Range and Bearing 1085m @ 046
Atl. Range and Bearing 1530m @ 060
Balt. Range and Bearing 5km est. @ 167
WATER PONDS:
- 625: Visit_Log, Site 2, Mon 10-Aug-1998 16:20:29 AKDT, Site visit Maui
Site visit Maui -- August 10, 1998, 2340-0020 UTC
Foggy, light/moderate wind. Ice melting.
Changed propane and flashcards.
Leveled radiometers and wiped off water drops off of them (esp SWin).
Tightened guy wires.
The meltpond had no ice on it.
Measurements: Radiometers 50-55 inches (sorry, all we had with us) from ice edge
94 inches above the water
ice edge is 7.5 inches high above the water
width of meltpond estimated as 200-250 inches
wand calibration @ 2358-0000 UTC: Twand=0.2 deg C RH=94.0%
T1=0.39 deg C RH=101.7%
T2=0.24 deg C
Flux plate had melted down 5 cm into ice, but was oriented approximately
horizontal. GBut the foil was coming off, so the foil was replaced and the
plate was repositioned at the surface of the ice (dot up) and covered with a
thin layer of ice granules.
Photos taken
- 626: Visit_Log, Site 3, Mon 10-Aug-1998 16:30:39 AKDT, Site visit Baltimore
Site visit Baltimore -- August 10, 1998, 2210-2330 UTC
Foggy, light/moderate wind. Ice melting. The meltpond around the sled has
melted through or is thin in a few spots. But most of it has 40 cm of ice below
the water. The ice pillar under the plywood has eroded from the sides but still
provides adequate support. With the addition of the ice pillar, there is 75-80 cm of ice under the platform -- still OK, but needs to be watched, esp. the
erosion of the pillar. Moved sled to the plywood edge closest to the edge of
the meltpond where ice appears most solid.
Changed propane and flashcards.
Leveled radiometers and wiped off water drops off of them (esp SWin).
Measurements: nearest meltponds to the radiometers are 11 and 13 meters away
height of lower radiometer domes to ice: 183 cm
sonic height: 117 inches
orientations: compass arm 141 deg T (22.5 deg decl)
sonic arm 55 deg T
radiometer arm 221 deg T
wand calibration @ 2250 UTC: Twand=0.3 deg C RH=92.3%
T1=0.51 deg C RH=102.7%
T2=0.23 deg C
Flux plate was in a water-filled crevice 9 cm into ice and was tipped about 30
degrees. The plate was repositioned at the surface of the ice (dot up) and
covered with a thin layer of ice granules.
Tsoil in crevice 6 cm into the ice and is not in water. Repositioned @ top of
the ice & covered with ice granules.
Photos taken
- 627: LOG, Site , Tue 11-Aug-1998 09:13:12 AKDT, Logger Constants at Maui
August 11, 1998 at 0811 local (1611 GMT)
Changed the constants in Maui's datalogger in prepration for new
Tsoil and level sensors. (this was done at the request of Steve
Semmer, constants in *4 spaces 30 - 44 were changed).
- 628: Daily_Status, Site all, Tue 11-Aug-1998 09:17:00 AKDT, Daily_Status
8/10/98 1600 - 8/11/98 1600 GMT
CURRENT WEATHER: 4 m/s SE, FOG. Temperature +0.2 C at 08:00
am local time; pressure=1004.9 mb.
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: Up
DATA:
Baltimore is OK
Florida is OK.
Atlanta is OK.
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK, heaters came on many times at Atlanta and Maui.
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: OK
VOLTAGES:
Atl: teg volt. 13 - 14.5 V; bat: 13 - 14.5 V
icharge: 1.8 - >2 A ; iload: 1 - 1.5 A, TEG temp. 15 - 30
Maui: teg: 13 - 14 v; bat:13-14 v
icharge:1.6 - >2 A; iload: 1.5 - 1.9 A, TEG temp. 20 - 30
Bal: teg: 13.5-14 V; bat: 13.5-14 V
icharge: 1.4 - >2 A; iload: 1.5A, TEG temp. 10-25
Fla: teg:12.5 - 13.5 V; bat: 12.5-13.5 V
icharge:0 - 2 A; iload: 2 A, TEG temp.5 - 15
LEADS:
WATER PONDS: We have seen some increase in the size of meltponds, also the
undermining if the edges of meltponds.
Snow Surface: Snow/ice surface has been very soft during the last 2 days
- 629: Visit_Log, Site 4, Tue 11-Aug-1998 14:09:28 AKDT, Site visit Florida
Site visit Florida -- August 11, 1998, 2130 UTC
Cloudy, light wind. Ice melting. Polar Star helicopters arriving.
Changed propane and flashcard. TEG had run out of fuel, but station still
running on battery.
Leveled radiometers - only minor adjustment
- 630: Daily_Status, Site all, Wed 12-Aug-1998 08:52:56 AKDT, Daily_Status
8/11/98 1600 - 8/12/98 1600 GMT
CURRENT WEATHER: 3 m/s SE, FOG. Temperature +0.2 C ; pressure=1005.8 mb.
at 800 AKDT
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: Up
DATA:
Baltimore is OK
Florida is OK.
Atlanta is OK.
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: OK, A few heating cycles at Maui, one at Florida
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Maui X, Atlanta X, levels don't look good
Compass OK
VOLTAGES: OK I think
LEADS: No new ones
WATER PONDS: First day, nothing to compare with
NOTES: First day for Peter and Dave. Apparently some liquid water getting
on sonics. I am not sure how critical levels are, there seems to have been
some settling. Please let us know what level is acceptable. Also please
check todays data to see if I have missed anything important - Peter
- 631: Daily_Status, Site all, Thu 13-Aug-1998 08:37:46 AKDT, Daily_Status
8/12/98 1600 - 8/13/98 1600 GMT
CURRENT WEATHER: 6m/s W, FOG. Temperature -0.1 C ; pressure=1005.0 mb.
at 800 AKDT, rain yesterday afternoon,evening
BASE: Pampoll up. (down 0800-1300 yesterday)
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: Up
DATA:
Baltimore is OK
Florida is OK.
Atlanta is OK.
Maui: Tsoil sensor is bad, Y level sensor is bad.
SONICS: Almost continous cycling at Atlanta, A few heating cycles at Maui,
one at Baltimore, none at Florida. Liquid water on sensors
RADIOMETERS: OK, two spikes in Tdomeout at Maui
T/RH: OK.
LEVELS, COMPASS: Levels OK (Yesterday's Daily_Status incorrect)
Compass OK
VOLTAGES: OK
LEADS: No new ones
WATER PONDS: About the same, no freezing
- 632: Visit_Log, Site 2, Thu 13-Aug-1998 21:12:11 AKDT, Maui - Tsoil and Level sensor
We ( Peter and Dave ) went to Maui to install the new level sensor board and
the Tsoil probe.
I tried to remove the old level sensor and was able to loosen one of the rusty
screws and the other one broke my Leatherman. I'll be back tomorrow with a
bigger screwdriver.
Next was the Tsoil sensor. When I plugged it in, Rocky said the temp was
-241.80C and when it was unplugged the temp was 699C. It shouldn't take very
long for the probe to settle, should it? I will try it at Fla. Are there any
diagnostics I can do here? I couldn't find a log on what happened to the old
one, what's wrong with it?
I. M. Back
- 633: Daily_Status, Site all, Fri 14-Aug-1998 08:29:19 AKDT, Daily_Status
8/13/98 1600 - 8/14/98 1600 GMT
CURRENT (0800AKDT) WEATHER: 2m/s E Overcast but good Visibility.
Temperature -2.5 C ;
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: Up
DATA:
Baltimore is OK
Florida is OK.
Atlanta is OK.
Maui: Tsoil sensor and Y level seem OK now
SONICS: Almost continous cycling at Atlanta since 0100, Others OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Levels OK
Compass OK
VOLTAGES: OK
LEADS: No new ones
WATER PONDS: They are freezing over! Yippee.
- 634: Daily_Status, Site all, Sat 15-Aug-1998 08:44:51 AKDT, Daily_Status
8/14/98 1600 - 8/15/98 1600 GMT
CURRENT (0800AKDT) WEATHER: 6.5 m/s NE Overcast snow flurries
Temperature -0.7 C, RH 98%, Pressure 996.0 mb
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up
Mau: Up.
Bal: up
Fla: Up
DATA:
Baltimore is OK
Florida is OK.
Atlanta is OK excedpt sonics.
Maui: Tsoil sensor and Y level seem OK now
SONICS: Continous cycling at Atlanta, Others OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Levels OK
Compass OK
VOLTAGES: OK
LEADS: Sara`s lake almost closed
WATER PONDS: Continuing to freeze
- 635: Visit_Log, Site 1, Sat 15-Aug-1998 20:16:41 AKDT, Atl - flash and propane
Changed the propane and flash card ( JD 221 - 227 )
The melt ponds were 3/4 covered with ice and the surface area was 45% melt
ponds. I could see a little open water in the Atl lead.
The upward looking SW radiometer was 40% covered with 2mm of clear ice.
The Tsoil probe was dug out and placed on the surface.
We looked at the sonic and couldn't get any good data out of the V axis. This
would explain the huge amount of heating cycles at Alt. I did
a quick visual on all the connectors and they looked good. I could hear that
all the heads were producing the "sonic buzz". I tried it with the heaters
unplugged, no luck. We brought the sonic in for a better look in the PAM room.
It's one of the new ones (S/N 980202), the book states "the Sonic Anemometer/
Thermometer is quite reliable on its own ..." and the other good quote
is "The transducers in the lastest instrument are NOT field replaceable."
We probably took the last snow machine ride to Atl, this season.
I M PAM
- 636: Daily_Status, Site all, Sun 16-Aug-1998 08:59:01 AKDT, Daily_Status
8/15/98 1600 - 8/16/98 1600 GMT
CURRENT (0800AKDT) WEATHER: 6.0 m/s NNW Overcast good visibility
Temperature -2.0 C, RH 95%, Pressure 995.8 mb
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up Sonics not installed
Mau: Up.
Bal: up
Fla: Up
DATA:
Baltimore is OK
Florida has some wind vector spikes, directions inconsistent..
Atlanta is OK excedpt sonics.
Maui: OK?
SONICS: Atlanta removed, Others OK
RADIOMETERS: OK Probably icing on upward looking Maui, Balt., Fla
T/RH: OK.
LEVELS, COMPASS: Levels OK
Florida suspicious Compass, the rest OK
VOLTAGES: OK
LEADS: Sara`s lake still small
WATER PONDS: Continuing to freeze, wind keeping some areas open
- 637: Rad_System, Site 2, Sun 16-Aug-1998 16:42:28 AKDT, Maui - Tsoil
I tried the "new" Tsoil probe at Fla and it also read -239.10 C. I checked the
the probe connector ( nice RTV job ) and didn't see anything obviously wrong.
I also looked around for a pin output or some help in the manuals up here,
nothing more than the calibration report. Any clues?
I M Soiled
- 638: Daily_Status, Site all, Mon 17-Aug-1998 08:27:29 AKDT, Daily_Status
8/16/98 1600 - 8/17/98 1600 GMT
CURRENT (0800AKDT) WEATHER: 5.5 m/s SSW Overcast OK visibility
Temperature -1.5 C, RH 95%, Pressure 995.8 mb, snow earlier
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up Sonics not installed
Mau: Up.
Bal: up
Fla: Up
DATA:
Baltimore is OK
Florida is OK
Atlanta is OK excedpt sonics.
Maui: Wind direction off due to compass
SONICS: Atlanta removed, Others OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Levels OK
Maui compass 90% too high
Yesterday it was Maui not Florida that was bad
VOLTAGES: OK
LEADS: Sara`s lake completely gone, no new leads nearby
WATER PONDS: Continuing to freeze, some snow drifting over, bur bottom ablation
continues. As a result there may be new "black holes" that we
can't see.
- 639: Daily_Status, Site all, Tue 18-Aug-1998 08:22:32 AKDT, Daily_Status
8/17/98 1600 - 8/18/98 1600 GMT
CURRENT (0800AKDT) WEATHER: 6.5 m/s S Snow, Rain, Freezing Rain
Temperature -0.5 C, RH 97.5%, Pressure 993.5 mb,
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up Sonics not installed
Mau: Up.
Bal: up
Fla: Up
DATA:
Baltimore is OK
Florida is OK
Atlanta is OK excedpt sonics.
Maui: Wind direction off due to compass
SONICS: Atlanta removed, Others OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Levels OK
Maui compass bad - spkes
VOLTAGES: OK
LEADS: A patch of open water by former Sara'a lake
WATER PONDS: About the same - mostly frozen over 10% open water in ponds
- 640: Daily_Status, Site all, Wed 19-Aug-1998 08:46:31 AKDT, Daily_Status
8/18/98 1600 - 8/19/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Winds at 2m 5.0 m/s S Periods of fog
Temperature -1.5 C, RH 96.5%, Pressure 996.8 mb,
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up Sonics not installed
Mau: Up.
Bal: up
Fla: Up
DATA:
Baltimore is OK
Florida is OK
Atlanta is OK excedpt sonics.
Maui: Wind direction 90 deg too high due to compass
SONICS: Atlanta removed, Others OK despite wet conditions
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Levels OK
Maui compass bad - spkes and 90 deg offset?
VOLTAGES: OK
LEADS: Small open water area NE of ship.
But very little open water in SHEAB area
WATER PONDS: Ice "skins" melting yesterday, freezing this morning
- 641: Visit_Log, Site 2, Wed 19-Aug-1998 18:22:28 AKDT, Maui - saved from the Drink
Peter and I took the helo out to Maui and noticed the sled was slightly tilted
from the air. When we got closer we found a ridge formed near the sled. We
suspect that activity broke the pedistal from the main flow. The result
was not pretty. The sled was on the ablation sheid which was on a chunk
of ice the size of the ablation shield and the whole thing was tipped over
about 30 degrees. The "front" corner of the sled was under and I could see about
3-5 inches in the box. The 2x4s that Kerry and Ola put around the sled last
rotation saved the sled from sliding off the ablation shields and into the
black darkness under the icy surface.
We called in for backup and some helo slings. Dean, Matt and Paul flew out
and we were able to put some slings around the sled and pull it off the ice
chunk, across some black death ( open water ) and up on to some "safe" ice.
Have no fear, EVE and the battery box were removed before preforming such
a trick manuver. Then we saved the ablation shield and decided to move the
sled on the same island as the tripod because of the current ice activity.
There were nice islands in the area but the cables were to short.
We also moved the radiometers back from the edge beacuse the "shore" was
becoming under cut quite a bit. The ponds in the area were 90% covered with
~3cm of dark grey ice.
Tomorrow we will try to get things plugged back in and online.
Your Arctic Movers
- 642: Daily_Status, Site all, Thu 20-Aug-1998 08:27:19 AKDT, Daily_Status
8/19/98 1600 - 8/20/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Stormy, Winds at 2m 10.0 m/s E; Snow
Temperature -0.2 C, RH 95%, Pressure 996.5 mb dropping like a rock
BASE: Pampoll up.
Shebop up
STATIONS: Atl: up Sonics not installed
Mau: Down .
Bal: up
Fla: Up
DATA:
Baltimore is OK
Florida is OK
Atlanta is OK excedpt sonics.
Maui: none
SONICS: Atlanta removed, Bal Fla OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Levels OK
VOLTAGES: OK
LEADS: No major events
WATER PONDS: Filling in with blowing snow
- 643: Daily_Status, Site all, Fri 21-Aug-1998 08:17:11 AKDT, Daily_Status
8/19/98 1600 - 8/20/98 1200 GMT
CURRENT (0800AKDT) WEATHER: Still stormy, Winds at 2m 12.0 m/s E; Snow
changed to freezing rain 1700 GMT yesterday then to rain at 2000 GMT
raining now, fog, Temperature 0.6 C, RH 99%, Pressure 993.3 mb steady
BASE: Pampoll went down at ~2000 GMT will re-start
Shebop up
STATIONS: Atl: up Sonics not installed
Mau: Down .
Bal: up
Fla: Up
DATA:
Baltimore is OK
Florida is OK
Atlanta is OK excedpt sonics.
Maui: none
SONICS: Atlanta removed, Bal Fla OK
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Levels OK
VOLTAGES: OK
LEADS: No major events
WATER PONDS: Ice skims turning rotten.
NOTES: Storm conditions preventing re-start at Maui and Sonic repair at Atlanta
- 644: Visit_Log, Site 2, Sat 22-Aug-1998 00:24:37 AKDT, Maui - rough site again
After a day and a half of 25 - 30 knot winds with fog/freezing rain/rain we
were able to get back to Maui for the reconstruction. Maui came back online
August 21 at 15:30. The reconstruction went smooth and she fired up on the
first try ( again ). We switched out the level sensor and will calibrate it
against the bubble level next trip because the Y axis wasn't settling.
I checked the Campbell CR10X and did NOT find a resistor between the 4H to 4L.
The wiring for the REBS T SOIL PRT is as follows:
T Soil AMP 9 pin AMP 9 pin CR10X
cable bulkhead
PRT #1 (blu) 1 1 5-H
PRT #2 (wht/blu) 2 2 5-L
PRT #3 (org) 3 3 10K
PRT #4 (wht/org) 4 4 4-H
shield 5 5 shield
- 6-9 6-9 -
The flux plate wire was apparently damaged when being extracted from the ice
to move the radiometers away from the edge, causing this to fail. The wire
looks repairable.
We plugged in the ATI sonic from Atl and the V axis also failed so I will
proceed with the Gill transplant.
The site is/was still active and a new 2-3 foot high ridge has formed about
10-15 feet east of the TRH sensor. The ridge runs SSE. The sled ended up
parallel just to the west and south legs of the tripod. It was not an ideal
site for the sled due to its proximity to the sonics, but there was no other
choice without moving the entire station. We felt it was worth the possible
contamination of the sonics data for some wind directions in order to maintain
the continuity of the site. This site is in a fairly precarious position with
the sled near a melt pond, the radiometer over a "black hole" and the sonics
next to a recently active pressure ridge. However, the data collected from
this site will be representatrive of some typical conditions that were not
sampled at any other PAM sites or the main camp, which are located on fairly
hefty, safe floes. The radiometer pond was half open and the sonic pond was
80% open. The station will be monitored carefully from the bridge and we will
make helo overpasses (and ask the ice guys to also) whenever possible.
I B Online Again
- 645: Daily_Status, Site all, Sat 22-Aug-1998 11:18:25 AKDT, Daily_Status
8/21/98 1600 - 8/22/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Storm over. Sun peeking out.
Winds at 2m 4.5 m/s S Temperature -1.0 C, RH 96%, Pressure 1013 rising
BASE: Pampoll up
Shebop up
STATIONS: Atl: up Sonics not installed
Mau: up since 2330 GMT yesterday.
Bal: up
Fla: Up
DATA:
Baltimore is OK
Florida is OK
Atlanta is OK except sonics.
Maui: OK except somtimes bad wind directions due to compass and flux
plate dead.
SONICS: Atlanta removed, Bal, Maui some heating cycles yesterday none lately
RADIOMETERS: OK
T/RH: OK.
LEVELS, COMPASS: Levels OK, Compass on Maui stll showing 90 deg offsets
sometimes
VOLTAGES: OK
LEADS: No major events, phew! (knock on wood)
RIDGES: New Maui ridge amy still be active
WATER PONDS: Ice skims re-freeziing.
- 646: Daily_Status, Site , Sat 22-Aug-1998 11:36:00 AKDT, Daily_Status two days ago wrong time
The second Daily_Status labelled 8/19 - 8/20 (and more) at top should have
read 8/20 - 8/21 etc.
- 647: Daily_Status, Site all, Sun 23-Aug-1998 10:36:23 AKDT, Daily_Status
8/22/98 1600 - 8/23/98 1600 GMT
CURRENT (0800AKDT) WEATHER: High Overcast Light winds , Temp -1 C
Sunny yesterday mroing and part of afternoon
BASE: Pampoll polling stopped last night - re-started
Shebop up
STATIONS: Atl: up Sonics not installed
Mau: up
Bal: up
Fla: Up
Because of lack of data over last few hours this report is abreviated.
LEADS: "Sara's" lake re-opened, about 50 - 200 m wide
RIDGES: None notices
WATER PONDS: Ice skims re-freeziing.
- 648: Daily_Status, Site all, Mon 24-Aug-1998 13:09:21 AKDT, Daily_Status
8/23/98 1600 - 8/24/98 1600 GMT
CURRENT (0800AKDT) WEATHER: High clouds, Winds light and variable.
Temperature -3 C, RH 99%, Pressure 1010 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up Sonics not installed
Mau: no data now, believe still up.
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is OK
Atlanta is OK except sonics.
Maui: OK except somtimes bad wind directions due to compass and flux
plate dead.
SONICS: Atlanta removed, Rest OK
RADIOMETERS: OK
T/RH: Gaps at Maui
LEVELS, COMPASS: Levels OK, Compass on Maui stll showing 90 deg offsets
sometimes
VOLTAGES: OK
LEADS: No major events, Sara`s lake about 50 meters wide open water
RIDGES: Some minor ridge activity
WATER PONDS: Melt ponds 95% frozen over. Many 3-6 cm thick ice
- 649: Daily_Status, Site all, Tue 25-Aug-1998 08:37:35 AKDT, Daily_Status
8/24/98 1600 - 8/25/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Overcast, Winds 3.4m/s E.
Temperature -2 C, RH 99%, Pressure 1014 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is OK
Atlanta is OK.
Maui: OK except somtimes bad wind directions due to compass and flux
plate dead. No T/RH
SONICS: All OK
RADIOMETERS: OK
T/RH: Maui not working
LEVELS, COMPASS: Jump at Balt due to maintainence
Atlanta seems to have 90 deg positive offset
Maui seems to have abut 30 deg offset
VOLTAGES: OK
LEADS: Sara`s lake North of ship
RIDGES: None known
WATER PONDS: Fozen Melt ponds had some water on top last night. Now re-freezing
NOTE: Our main 20 m tower has a fatal short circuit that will require
attention before these problems are addressed. Polar bear around
yesterday.
- 650: Visit_Log, Site 3, Tue 25-Aug-1998 09:33:23 AKDT, Bal - propane, flash, heights and compass
Went to Balt by helo yesterday ( 8/24/98 ) for a check up.
The site is on 80 - 88 cm of ice. The ice guys were there, too. The melt pond
at the sled was frozen enough for me to walk on and the sled seemed safe. The
ponds in the area were frozen over but there was some open water in the bigger
ponds ( with some seals ).
heights
293 cm middle of the sonic boom to surface
237 cm end of TRH shield to surface
200 cm from middle of radiometer to surface
compass 181 degrees ( no decl. correction (magnetic) ) Rocky 278.26 ( RAW ),
Rocky said the decl. is 31.5 degrees. Is this some automatic reading updated by
the satellites or something that has been entered by hand?
Rocky 309.76 (w/decl) I might have read the wrong
end of the compass needle and it also could have been 001 degrees. Can
we check from the winds or should I take another trip out there? Off by
seven degrees???
RH was 101.43% seemed a bit unreal but couldn't see anything wrong. The RH
sensors on the tower are high too and we suspect a problem.
The flash card had the correct days on it ( 222 - 236 ).
Costa
- 651: Gill_Sonic_Tests, Site 1, Tue 25-Aug-1998 10:08:29 AKDT, Atl - Gill installed ( 30 degrees off and no boom )
The spare Gill was installed ( 8/24/98 ) 1315 hours. Config 52 was
downloaded but how do I check to make sure it has the new and improved
Gill software, like the Fla Gill?
The Gill is mounted very close to the mast and I need to bring out the Gill
size boom extention. Does anybody know where one was last seen? I checked out
the PAM room and a quick search on deck, but no luck yet. Also, it
was mounted with the North arrow 30 degrees CCW to the boom.
The "SHEBA PAM Operators Guide" said the usual mounting
orientation of the Gill sonic on the PAM station is with the "N" arrow
parallel to the sonic boom. I looked at the mounting bracket at Fla today
and saw that only one screw is necessary to hold the bottom of the Gill
in place. The data needs a 30 degree correction until I can get back
out there and rotate it.
The ponds where covered with ice and I moved the sled about a foot higher on
the ablation shield.
D. Costa
- 652: Visit_Log, Site 4, Wed 26-Aug-1998 00:54:41 AKDT, Fla - propane, flash, rad fan
The propane and flash card were changed. The instruments looked clean. One of
the fans was unplugged and I plugged it back in.
The flash card had the correct days on it ( 223 - 237 ).
heights
295 cm middle of SONIC boom to surface
230 cm middle of the TRH boom to surface
220 cm middle of the RADIOMETER boom to surface
130 cm in front of the radiometers there is a valley 50 cm deep and 25 cm
due west of the radiometers there is a peak 10 cm high
compass
Rocky 213.10 ( raw ), 244.50 ( w/decl )
actual 297 ( magnetic )
The ponds were all covered with ice in the area.
I C Ice
- 653: Daily_Status, Site all, Wed 26-Aug-1998 09:08:27 AKDT, Daily_Status
8/24/98 1600 - 8/25/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Overcast, Winds 6 m/s ENE.
Temperature -1.5 C, RH 98%, Pressure 1020 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: up
Fla: up
DATA:
Baltimore is OK
Florida is OK
Atlanta is OK.
Maui: OK except somtimes bad wind directions due to compass and flux
plate dead. No T/RH
SONICS: All OK
RADIOMETERS: OK
T/RH: Maui not working
LEVELS OK,
COMPASS: Maui?
VOLTAGES: OK
LEADS: Sara`s lake closed. No major leads
RIDGES: None known
WATER PONDS: Freezing fast
- 654: Gill_Sonic_Tests, Site 1, Wed 26-Aug-1998 18:20:57 AKDT, Atl - Gill aligned with boom
I was able to stop by Alt on the way back from Maui and align the N arrow
with the boom. The N arrow now points straight out from the boom. I haven't
found any of the Gill sonic booms. The screws didn't line up on the bottom
bracket so the top clamp and the edge of the bottom bracket are
the only things holding it on. This Gill is "Symetric" and the one at Fla
is "Asymetric".
Silly Gilly
- 655: Visit_Log, Site 2, Wed 26-Aug-1998 18:56:47 AKDT, Maui - propane, flash, heights and compass
Peter and I took the helo to service Maui. The flash card and propane were
swapped.
The melt ponds around the sled were 75% covered with thin wet nilas (.5-3 cm),
the rest open water. The ice directly under the radiomters was dark
grey about 1-2 cm thick.
heights
328 cm middle of the sonic boom to surface
261 cm middle of the TRH boom to surface
231 cm a peak about 4:30 o'clock 40 cm away, ( noon would be looking straight
out of the TRH boom )
244 cm from middle of radiometer to surface of the WATER (actually thin ice)
087 cm from the "shore" to a point directly under the radiometers
027 cm from the top of the "shore" to surface of the WATER
218 cm middle of the rad boom to surface of the snow
(note the radiometer heights don't add up correctly due to rounding )
compass 343 degrees ( no decl. correction (magnetic) )
The TRH/compass were DOA and the fuse was blown. I replaced the fuse and things
seemed to work for a bit. The data we are getting back now is erratic. Two of
the pins in the connector looked a little bit suspicious. I'll
head back out with the pin outs and give it a look when I can. Did I send back
the only TRH at the end of my last rotation?
The flash card had the correct days on it ( 222 - 238 ) missing 232 because
stations was offline.
Peter leveled the radiometers and pulled the flux plate up for repair.
Hugs
- 656: Daily_Status, Site all, Thu 27-Aug-1998 08:37:26 AKDT, Daily_Status
8/26/98 1600 - 8/27/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Moatly clear ans sunny, coldest day since spring
Winds 3 m/s NE.
Temperature -5 C, RH 100%, Pressure 1020 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: up
Fla: up
DATA:
RH on all stations suspiciously high
Baltimore is OK
Florida is OK
Atlanta is OK.
Maui: OK except T/RH
SONICS: All OK Atlanta sonic orietation changed but WD still too high by
about 20 degrees
RADIOMETERS: OK
T/RH: Maui fuse replaced, worked for a few minutes then died again
LEVELS OK except Maui Y component doesn't work when checked at site visit,
COMPASS: Maui still way off?
VOLTAGES: OK
LEADS: Sara`s lake closed. No major leads
RIDGES: None known
WATER PONDS: Freezing very fast
- 657: Daily_Status, Site all, Fri 28-Aug-1998 08:32:51 AKDT, Daily_Status
8/27/98 1600 - 8/28/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Overcast, super-cooled fog earlier
Winds 5 m/s W.
Temperature -2 C, RH 100%, Pressure 1012 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: up
Fla: up
DATA:
Still suspect RH too high, compares well with tower but I have doubts
about those also. Suspect sensor degradation after long period of use
in high RH environment. SPO replaced their RH sensors and got lower
values. Other people may not agree with this assessment.
Baltimore is OK
Florida is OK
Atlanta is OK.
Maui: problems see below
SONICS: Atlanta WD seems more consistent. Maybe OK.
Many heating cycles at all sites from 0300 - 1100 due to super-cooled
fog.
Maui appears to have sersious problem with v component, continues to
cycle.
RADIOMETERS: OK
T/RH: Maui down
LEVELS OK except Maui Y component
COMPASS: Maui down
VOLTAGES: OK
LEADS: Sara`s lake closed. No major leads
RIDGES: None known
WATER PONDS: Still freezing. Thick enough to walk on (5-7 cm) in most places.
Still thin towared Maui (due to ice movement?)
- 658: Daily_Status, Site all, Sat 29-Aug-1998 09:11:23 AKDT, Daily_Status
8/28/98 1600 - 8/29/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Very foggy and wet
Winds 0.5 m/s NW.
Temperature -0.5 C, RH 100%, Pressure 1004.5 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: up
Fla: up
DATA:
Baltimore some problems see below
Florida is OK
Atlanta is OK.
Maui: problems see below
SONICS: Atlanta WD seems more consistent. Maybe OK.
Maui heaters not working so water/ice causing problems
Baltimore w component not working. No heater cycles recently for
unknown reason. Maybe related to extreme wet conditions.
RADIOMETERS: Look OK but likely affected by extreme moisture
T/RH: Maui down
LEVELS OK except Maui Y component
COMPASS: Maui down
VOLTAGES: OK
LEADS: Sara`s lake closed. No major leads
RIDGES: None known
WATER PONDS: Ice covers and new snow wet amd melting
- 659: Visit_Log, Site 1, Sat 29-Aug-1998 21:27:09 AKDT, Atl - propane, flash, heights and compass
Peter and I took the helo to service Atl. The extention boom was installed
on the Gill. The flash card and propane were changed.
The melt ponds around the sled were 100% covered with ice and snow.
The snow/ice was slushy today. Some open water 100 m to NNE.
Radiometers were clean.
heights
297 cm middle of the sonic boom to surface
357 cm Gill sensor center to surface
230 cm middle of the TRH boom to surface
187 cm bottom of TRH shield to surface
208 cm middle of the rad boom to surface of the snow
compass
295.44 raw, 325.94 w/decl Rocky
24 magnetic ( by hand )
The flash card did not have the correct number of days on it. Parts of 227, 228
and 236 only.
Mr PAM
- 660: Daily_Status, Site all, Sun 30-Aug-1998 09:45:30 AKDT, Daily_Status
8/29/98 1600 - 8/30/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Fog
Winds 1.5 m/s W.
Temperature -1.0 C, RH 100%, Pressure 1008.5 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: up
Fla: up
DATA:
Baltimore OK
Florida OK
Atlanta OK.
Maui: problems see below
SONICS: All OK despite wet conditions
RADIOMETERS: Look OK
T/RH: Maui now down despite new T/RH probe
LEVELS OK except Maui Y component
COMPASS: Maui removed
VOLTAGES: OK
LEADS: No major leads
RIDGES: Ridging still active at Maui
WATER PONDS: Not much change
- 661: Visit_Log, Site 2, Sun 30-Aug-1998 12:21:41 AKDT, Maui - trh, compass and site description
Dropped by Maui to check out the TRH and compass. The fuse was blown. Pin 9
on the connector to the TRH unit was a little corroded. We replaced the fan
and removed the compass beacuse it was giving erroneous readings. Do
we have another one on site? We also switched the TRH unit. The serial
number is R4 910001 50Y. Does the Campbell programm need to be modified?
The fan on the downward-looking pyrgeometer is not working. However, no
frost or moisture was on the sensor. The radiometers were level to within
0.3 degrees using a bubble-level and were not re-adjusted. The y-axis
on the built-in electronic level does not work. The sonic anemometers were
level to within 0.5 degrees and were no-readjusted.
The ice around the Maui floe continues to be active, despite low winds.
The rubble pile that we observed just in
front of the sonics on the last visit has moved about 5 meters to the east.
Another similar piler is now in the same place in front of the sonics. The
area under the radiometers has frozen to about 1-3 cm and there are also small
(2-5) cm chunks of white brash imbedded in the new-ice. There has been some
finger-rafting of the new ice.
A major change is
that the pool of water/new ice below the radiometers has been greatly shrank by
the ice movement, thick white ice moving in to with 2 meters of the location
directly below the radiometers. Therefore some of the increase (decrease)
in upwelling shortwave (longwave) radiation is due to advection of whiter ice,
rather than is situ freezing, although the latter is also ocurring.
The Maui ice floe itself is about the
same size, with no apparent ablation around the edges. The distances from
the radiometer to the main flow edge are the same as before.
The flux plate was repaired and reinstalled ( dot up ). We will wrap it
in foil during the next visit.
Mrs PAM
- 662: TRH, Site 2, Mon 31-Aug-1998 00:45:16 AKDT, Maui - trh/compass
I've found the jack to the fan on the board had come off. I put it back on
and have been running the unit in the PAM room with the compass attached.
The compass was still erroneous data, values from 240 to 300 (when still).
Can I hook it up to a comm port and talk to it using Procomm? I checked
out the manual, should I open it and have a looks see? I will have
to hook it up at Fla to confirm it's deadness.
The TRH unit that was at Maui:
TRH 006
P1110023 50Y
the compass was KVH P/N 01-0177-0015, S/N 97060186
I found the coefficients for the TRH that's at Maui now.
dmc
- 663: Daily_Status, Site all, Mon 31-Aug-1998 08:31:35 AKDT, Daily_Status
8/30/98 1600 - 8/31/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Overcast
Winds 4.5 m/s W.
Temperature -2.0 C, RH 99-100%?, Pressure 1012.5 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: up
Fla: up
DATA:
Baltimore OK
Florida OK
Atlanta OK.
Maui: looks OK Repaired flux plate had some extreme values yesterday
looks OK now
SONICS: All OK
RADIOMETERS: Look OK
T/RH: Maui now looks OK. New probe showing what appear to be more realistic
variations in RH. I believe this is evidence of what I earlier
suspected was degradation of all the PAM RH sensors (and for that
matter all the RH sensors on the main tower)
LEVELS OK except Maui Y component
COMPASS: Maui removed
VOLTAGES: OK
LEADS: No major leads
RIDGES: ??
WATER PONDS: Wet areas on top of thin ice now freezing
- 664: Daily_Status, Site all, Tue 01-Sep-1998 08:50:19 AKDT, Daily_Status
8/31/98 1600 - 9/1/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Overcast
Light winds
BASE: Pampoll down will re-boot
Can't say much until we get data
LEADS: Lead between ship and Baltimore
RIDGES: ??
WATER PONDS: Freezing
- 665: Daily_Status, Site all, Wed 02-Sep-1998 08:38:11 AKDT, Daily_Status
9/1/98 1600 - 9/2/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Overcast, No fog
Winds 2.5 m/s NNE.
Temperature -3.5 C, RH 97%, Pressure 1014.0 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: up
Fla: up
DATA:
Baltimore OK
Florida OK
Atlanta OK.
Maui: No T/RH plotted
SONICS: All OK
RADIOMETERS: Look OK
LEVELS OK except Maui Y
COMPASS: Maui removed
VOLTAGES: OK
LEADS: Large lead between ship and Baltimore
Another right next (around) Maui
RIDGES: ??
WATER PONDS: Freezing fast, No open water except in active regions.
NOTE: Maui has rotated at least 120 degrees. The radiometers may not be
over new ice/water anymore. Sonics now facing ship and pointing toward
open water.
- 666: Visit_Log, Site 2, Wed 02-Sep-1998 16:29:48 AKDT, Maui - on the move
Visited Maui 1015 - 1200 and 1445-1455 AKDT
Maui is an small island of ice in a very active region. During the morning
the radiometers were over an area of brash ice. The immediate area (within
30 m) around Maui is about 50% open water. This drops off to less than 5%
except in a region running approx NW to SW which is active and has about 30%
open water. There was more ridging right under the sonic tripod and around the
edges to the left and right of the sonics. Rafting ice depressed the sonic side
of the floe but ridging of the outer tripod leg kept the tripod level.
Radiometers needed some leveling due to the tipping of the flow, but not too
much.
During the afternoon visit, the floe had rotated about 90% and there was much
more open water in the immediate region. Open water under the radiometers.
No further ridging. This period should provide a unique data set, under
conditions probably never sampled before...
The electronic compass, TRH and fan are all back on line at Maui. The compass
worked much better after I opened it up and poured the water out. :-)
I asked about opening the electronic compass because it looked like it was still
factory sealed. We were only getting only 1.5 volts at the TRH boom and we
found some corrosion in the connectors in the sled at the EVE box. Lots of
open sea water in the area and part of that sled was under water a couple
of weeks ago. So we took out the "extra" cable from the radiometer boom and used
that as the TRH cable and it worked fine. The TRH at Maui now is the
orginal one, so the coefficients should now be fine.
The one fan is still out, on the radiometers. It's a tricky fix because they
are over open water now. If it drifts over some solid ice we will be able to
get at it.
Approx 1630 AKDT
The Tsoil coefficients were changed. The S/N on the sensor is NCAR002
so we use the coefficients for S/N N002. There wasn`t an exact match
for the S/N in the email from Claffey/Semmer ( S/N 97002 is close ).
I M Drifting
- 667: Daily_Status, Site all, Thu 03-Sep-1998 08:31:02 AKDT, Daily_Status
9/2/98 1600 - 9/3/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Overcast/fog
Winds 2.5 m/s NNE.
Temperature -3.5 C, RH 97%, Pressure 1014.0 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: up
Fla: up
DATA:
Baltimore OK
Florida OK
Atlanta OK.
Maui: OK
SONICS: All OK
RADIOMETERS: Look OK
LEVELS OK except Maui Y
COMPASS: All OK new Maui compass looking good (yes Maui is rotating that fast.)
VOLTAGES: OK
LEADS: Lead activity near all stations
Maui is in one,
Lead between ship and Baltimore
Lead just on side away from ship at Fla and Atl.
RIDGES: Rafting around Maui
WATER PONDS This category will be dropped. They are virtually all frozen on top
and whatr is open will be called "leads"..
NOTE: Maui and Baltmore performing "lead studies". Keeping close eye on both.
- 668: Daily_Status, Site all, Fri 04-Sep-1998 08:42:26 AKDT, Daily_Status
9/3/98 1600 - 9/4/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Overcast/fog
Winds 4.5 m/s NE.
Temperature -2.0 C, RH 99%, Pressure 1019 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: up?
Fla: up
DATA:
Baltimore Some gaps
Florida OK
Atlanta OK.
Maui: OK
SONICS: All OK
RADIOMETERS: Look OK
LEVELS OK except Maui Y
COMPASS: All OK
VOLTAGES: OK
LEADS: Same as yesterday
RIDGES: ?
WATER PONDS What ponds?
- 669: Daily_Status, Site all, Sat 05-Sep-1998 08:34:13 AKDT, Daily_Status
9/4/98 1600 - 9/5/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Overcast Clear periods last night,
very light snow dusting
Winds 4.5 m/s NE.
Temperature -4.5 C, RH 98%, Pressure 1019.8 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: up but radio link very spotty
Fla: up
DATA:
Baltimore gaps due radio link
Florida OK
Atlanta OK.
Maui: OK
SONICS: All OK Some heater cycling just now
RADIOMETERS: Look OK
LEVELS OK except Maui Y
COMPASS: All OK
VOLTAGES: OK
LEADS: Mostly closed
RIDGES: ?
- 670: Daily_Status, Site all, Sun 06-Sep-1998 18:56:01 AKDT, Daily_Status
9/4/98 1600 - 9/5/98 1600 GMT
The "real" daily log was erased by mistake. There were no major problems
( except this one ).
Dave
- 671: Visit_Log, Site 2, Sun 06-Sep-1998 19:01:43 AKDT, Maui - propane, flash, nozzle and compass
Changed the flash card, propane and TEG nozzle. The flash card had the correct
number of days ( 238 - 249 ). The nozzle "head" was 75% covered with
burnt tar.
The fan on the downward-looking pyrgeometer is still not working. We're waiting
for some solid ice to form under the sensor. However, no
frost or moisture was on the sensor. The radiometers were bubble leveled.
Rocky read x = -0.22, y = -0.69
We did a calibration with our TRH wand.
The wand read temp = -1.5, RH = 92.9
Rocky read Tdry = -1.35 Tdry2 = -1.49, RH = 101.73
Compass 234 magnetic, Rocky 136.1 (raw)
Conditions were generally similar to the last visit, a little less open
water. There has been some more ice movement, but significant changes to
the small Maui flow itself.
Below the radiometers are several chunks of brash, some new grey ice
and some larger 50 cm thick floes. Peter made picture survey.
PAMmy
- 672: Visit_Log, Site 3, Sun 06-Sep-1998 23:49:59 AKDT, Balt - propane, flash, nozzle, compass and RF
Changed the flash card, propane and TEG nozzle. The flash card had the correct
number of days ( 237 - 250 plus 236? ). The nozzle looked clean.
The radiometers were bubble leveled.
Rocky read x = 0.44, y = -0.07
The sonics were thickly covered with rime, but apparently not blocking the
sound waves. Radiometers were clean.
We did a calibration with the NOAA TRH wand.
The wand read temp = -1.35, RH = 93.3
Rocky read Tdry = -1.22 Tdry2 = -1.41, RH = 103.07
Compass 233 magnetic, Rocky 242.42 (raw), 273.02 ( w/decl ),
decl = 29.6 west is neg
The site is ~ five miles from the ship and is unable to communicate with
pampoll. We couldn't see the ship from the site ( fog ) and it's ~ 104
degrees off the bow. The status LEDs were solid red on 'carrier detect' and
blinking red on 'clear to send'. The matrix in the manual lists that as
1. Powered, disconnected
2. Master calling slave through repeater
3. Mode 6, disconnected ( Point to Point Slave/Master Switchable )
I don't think we have a repeater, do we? The LEDs were on ie. power on.
Mode 6 seems OK to me. The ship and station have been rotating quite a bit
and the signal was getting spoty so I think we lost 'line of site'. I will
dink around with the ship antenna and try to pick link up.
The station is located near the center of a flat floe that is about 200 meters
diameter. Surrounding the floe is a very active region with many pressure ridges
and open water regions (approx 15% open water). There is fresh snow about 4 cm
deep with deeper drifts on the Baltimore floe. Area immediately under the
radiometers is flat and snowy with no evidence of melt pond visible on the
surface.
Peter took pictures.
PAMette
- 673: Daily_Status, Site all, Mon 07-Sep-1998 08:43:16 AKDT, Daily_Status
9/6/98 1600 - 9/7/98 1600 GMT
CURRENT (0800AKDT) WEATHER: Overcast Clear periods last night,
very light snow dusting
Winds 2.5 m/s W.
Temperature -2.0 C, RH 98%, Pressure 1016.4 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: presumed up but radio link not working
Fla: up
DATA:
Baltimore ?
Florida OK
Atlanta OK.
Maui: OK
SONICS: OK heater not working at Baltimore
RADIOMETERS: Look OK
LEVELS OK except Maui Y
COMPASS: All OK
VOLTAGES: OK
LEADS: Mostly closed
RIDGES: ?
- 674: Daily_Status, Site all, Tue 08-Sep-1998 08:37:03 AKDT, Daily_Status
9/7/98 1600 - 9/8/98 1600 GMT
CURRENT (0800AKDT) WEATHER: High Overcast and patchy fog,
Winds 2.5 m/s W.
Temperature -3.5 C, RH 100%, Pressure 1019 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: presumed up but radio link not working
Fla: up
DATA:
Baltimore ?
Florida OK
Atlanta OK.
Maui: OK
SONICS: OK heater not working at Baltimore
RADIOMETERS: Look OK
LEVELS OK except Maui Y
COMPASS: All OK
VOLTAGES: OK
LEADS: Mostly closed
RIDGES: ?
- 675: Visit_Log, Site 4, Tue 08-Sep-1998 09:19:40 AKDT, Fla - propane, flash, nozzle, compass and trh cleaned
The propane, flash card and TEG nozzle were changed yesterday (9/7/98) at 1045.
The flash card had the correct number of days ( 237 - 250 ).
heights
229 cm middle of the TRH boom to surface
187 cm bottom of TRH shield to surface
293 cm middle of the sonic boom to surface
5 cm added to the last radiometer reading, we didn't want to disturb the
fresh snow under the boom
compass
342 magnetic, 255.18 Rocky (raw ), 284.38 Rocky ( w/decl ), 29.2 decl (Rocky)
We pulled the TRH off to clean and then reinstalled at 1515.
After 15 minutes with the calibration wand.
Rocky Tdry = -1.99, Tdry2 = -2.05, RH = 98.75
wand temp = -2.1, RH = 91.5
The area hasn't changed except for the addition of 5 cm of new snow.
I C Polar Star
- 676: Visit_Log, Site 3, Tue 08-Sep-1998 09:54:58 AKDT, Balt - sonic heaters, RF and flash
Stopped by Batl to check the flash card and RF transmitter.
The flash card was collecting data.
The RF transmitter has ~12.5 volts in.
The site is 5 miles away and the manual claims the link is good
up to 20 miles. We can try moving the antenna on the ship?
The heaters on the sonics don't seem to be coming on when the counts
are bad. We covered one of the heads and Rocky never reported the
heaters ON. I stripped the heaters off of the bad Atl. sonic head to
try at Balt during the next visit but, it would seem more like
a software problem. Does EVE have some kind of check to know if
the heaters are 'really' ON?
later
- 677: Daily_Status, Site all, Wed 09-Sep-1998 13:44:55 AKDT, Daily_Status
9/7/98 1600 - 9/8/98 1600 GMT
CURRENT (0845 AKDT) WEATHER: Overcast, Winds 3 m/s,
Temperature 0.5 C, Pressure 1019.8 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Mau: up.
Bal: Radio link not working
Fla: up
DATA:
Baltimore: ?
Florida: OK
Atlanta: OK.
Maui: OK
SONICS: OK, Some heating cycles during yesterday's fog.
RADIOMETERS: OK
LEVELS: OK
COMPASS: All OK
VOLTAGES: OK
LEADS: Mostly closed, but plentiful open water north of Florida and
all around Maui from melt ponds.
RIDGES: No new ridges.
- 678: Daily_Status, Site all, Thu 10-Sep-1998 08:19:58 AKDT, Daily_Status
9/9/98 1600 - 9/10/98 1600 GMT
CURRENT (0730 AKDT) WEATHER: Thick overcast; Winds 3 m/s, westerly;
Temperature -1.6 C; Pressure 1019.0 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Maui: up.
Balt: Radio link not working.
Fla: up
DATA:
Baltimore: ?
Florida: OK
Atlanta: OK
Maui: OK
SONICS: OK. Atlanta wind direction looks rotated.
RADIOMETERS: OK
TSOIL: Above zero at Maui.
LEVELS: OK
COMPASS: OK
VOLTAGES: OK
LEADS: Mostly closed, but plentiful open water north of Florida.
RIDGES: No new ridges.
- 679: Daily_Status, Site all, Fri 11-Sep-1998 08:08:30 AKDT, Daily_Status
9/10/98 1600 - 9/11/98 1600 GMT
CURRENT (0755 AKDT) WEATHER: Mostly clear; Winds 3 m/s, westerly;
Temperature -7.2 C; Pressure 1020.0 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Maui: Up, but some sensors down following a bear visit.
Balt: Radio link worked only briefly on two occasions
Fla: up
DATA:
Baltimore: ?
Florida: OK
Atlanta: OK
Maui: Lost temperatures, humidity, and compass after 2130 GMT on
September 10. Are there spares here?
SONICS: OK. Some heating early morning (AKDT) of the 11th. Direction off
at Atlanta.
RADIOMETERS: OK
TSOIL: Above zero at Maui.
LEVELS: OK
COMPASS: OK
VOLTAGES: OK
MELT PONDS: All melt ponds are ice covered. Most have dusting of snow.
LEADS: No new leads.
RIDGES: No new ridges.
- 680: Visit_Log, Site 2, Fri 11-Sep-1998 20:42:29 AKDT, Maui TRH
Ed and Scott visited Maui to repair damage done by a curious bear.
The bear visited Maui yesterday, Oct 10 at approx. 14:00 local. We
lost TRH and compass readings.
We pulled the head (tail ?) plate off and found the small (6 pin
I think) connector unplugged and the piggy backed board unplugged.
Plugging these back in solved the problems of no temp, RH and
compass readings. The bear had apparently swatted the long vertical
temp housing, causing it to pop loose and dangle enough to unplug
things. All is OK. We also reinserted the soil temp probe at the
ice/snow layer. The bear had pulled it loose and it was lying on the
surface of the snow.
Ed measured compass as pointing 124 deg magnetic. Rocky gave the value as
117 deg.
- 681: Daily_Status, Site all, Sat 12-Sep-1998 08:27:59 AKDT, Daily_Status
9/11/98 1600 - 9/12/98 1600 GMT
CURRENT (0755 AKDT) WEATHER: Cloudy; Winds 4 m/s, southerly;
Temperature -2.7 C; Pressure 1018.3 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Maui: up .
Balt: Radio link working only sporadically and infrequently.
Fla: up
DATA:
Baltimore: The data we do receive from Baltimore are suspect.
Florida: OK
Atlanta: OK
Maui: OK
SONICS: OK. Some heating morning (AKDT) of the 11th. Direction off
at Atlanta.
RADIOMETERS: OK
TSOIL: All now negative since we repositioned Maui at snow-ice interface.
LEVELS: OK
COMPASS: OK
VOLTAGES: OK
MELT PONDS: All melt ponds are ice covered. Most have dusting of snow.
LEADS: No new leads.
RIDGES: No new ridges.
SURFACE: A mottled mixture of bright white snow and dark or gray
refrozen melt ponds and leads. This varied surface albedo is
especially pronounced north of Florida and all around Maui.
- 682: Visit_Log, Site 4, Sat 12-Sep-1998 08:38:15 AKDT, Florida TRH
Before we visited Maui on the 11th, we took a spare TRH unit to
Florida to see if it worked. Therefore the Florida TRH and compass record
has some interruptions in it between 2 and 3 p.m. when we were swapping units.
- 683: propane, Site 1, Sat 12-Sep-1998 18:44:16 AKDT, Routine fueling & notes - Atl
Sat Sep 12 1998
Ed and Scott visited Atlanta for a routine propane swap.
All went well. We also swapped Flash cards.
Rocky's monitor became impossible to read in a very short time.
The sled is unlevel and hence the wind generator appears to work
only during strong winds. It is tilted so the heavy front end points
down and it take strong winds to overcome this tilt and spin it.
It appears that within a week or two, enough of the path to Atlanta
will be frozen that it can be removed with a snow machine.
Atlanta`s compass is pointing at 319 degrees magnetic.
Bear tracks all around the station,including right under the radiometers.
Evidently the same bear that visited Maui 3 days ago visited here first.
- 684: Visit_Log, Site 3, Sat 12-Sep-1998 18:56:20 AKDT, Baltimore Search Mission
Sat Sep 12 1998
Ed and Scott went searching for Baltimore and found it!
Rocky could not be used so all we did was swap flash cards and shoot
some angles. We know Baltimore is alive because we get trickles of
data now and then. There are no LOS problems, just a clear path
to the ship.
One minor detail : The GPS data from Baltimore lists only the degrees.
The min. and sec. values displayed by show_misc are actually the
degree value. (We see that the other stations report this way to though.
A programming glitch?)
Our plan at this point is to allow Baltimore to run until it`s scheduled
propane refill, sometime around Sep 20. We will then helo it back to camp
and retire it from active SHEBA duty.
Baltimore`s compass is pointing at 293 degrees magnetic. How do we update
this value in the data stream.
- 685: Daily_Status, Site all, Sun 13-Sep-1998 08:47:13 AKDT, Daily_Status
9/12/98 1600 - 9/13/98 1600 GMT
CURRENT (0815 AKDT) WEATHER: Cloudy; Winds 2 m/s, southwesterly;
Temperature -2.6 C; Pressure 1020.9 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Maui: up .
Balt: Radio link working only sporadically and infrequently.
Fla: up
DATA:
Baltimore: Flashcard updated the data record.
Florida: OK
Atlanta: OK
Maui: OK
SONICS: Good
RADIOMETERS: OK
TSOIL: All OK, except Maui showed a few hours above 0 deg C although we
repositioned sensor at snow-ice interface two days ago.
LEVELS: OK
COMPASS: OK
VOLTAGES: OK
MELT PONDS: All melt ponds are ice covered. Most have dusting of snow.
LEADS: No new leads.
RIDGES: No new ridges.
SURFACE: A mottled mixture of bright white snow and dark or gray
refrozen melt ponds and leads. This varied surface albedo is
especially pronounced north of Florida and all around Maui. The net
radiation at Maui shows the sensors view of a refrozen lead.
- 686: Daily_Status, Site all, Mon 14-Sep-1998 10:45:51 AKDT, Daily_Status
9/13/98 1600 - 9/14/98 1600 GMT
CURRENT (0815 AKDT) WEATHER: Fog and heavy clouds; Winds light;
Temperature -3.2 C; Pressure 1025.0 mb; mild riming
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Maui: up .
Balt: Radio link working only sporadically and infrequently.
Fla: up
DATA:
Baltimore: Presumably OK
Florida: OK, periodic, short missing intervals. Radio link?
Atlanta: OK
Maui: OK
SONICS: Good
RADIOMETERS: All OK. Maui still showing higher net radiation because of
radiometers positioned over refrozen lead.
TSOIL: OK, except Maui showed a few hours above 0 deg C. It tracks
the variations in temperature at the other stations, though.
LEVELS: OK
COMPASS: OK
VOLTAGES: OK
MELT PONDS: All melt ponds are ice covered. Most have dusting of snow.
LEADS: No new leads.
RIDGES: No new ridges.
SURFACE: No real firming up with the mild temperatures of the last few days.
Snow is white and bright, however.
- 687: Daily_Status, Site all, Tue 15-Sep-1998 08:26:35 AKDT, Daily_Status
9/13/98 1600 - 9/14/98 1600 GMT
CURRENT (0815 AKDT) WEATHER: Fog and heavy clouds; Winds light;
Temperature -3.2 C; Pressure 1025.0 mb; mild riming
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Maui: up .
Balt: Radio link working only sporadically and infrequently.
Fla: up
DATA:
Baltimore: Presumably OK
Florida: OK, periodic, short missing intervals. Radio link?
Atlanta: OK
Maui: OK
SONICS: Good
RADIOMETERS: All OK. Maui still showing higher net radiation because of
radiometers positioned over refrozen lead.
TSOIL: OK, except Maui showed a few hours above 0 deg C. It tracks
the variations in temperature at the other stations, though.
LEVELS: OK
COMPASS: OK
VOLTAGES: OK
MELT PONDS: All melt ponds are ice covered. Most have dusting of snow.
LEADS: No new leads.
RIDGES: No new ridges.
SURFACE: No real firming up with the mild temperatures of the last few days.
Snow is white and bright, however.
- 688: Daily_Status, Site all, Tue 15-Sep-1998 08:30:03 AKDT, Daily_Status
9/14/98 1600 - 9/15/98 1600 GMT
CURRENT (0810 AKDT) WEATHER: Clouds; Wind 4 m/s, southeasterly;
Temperature -3.8 C; Pressure 1026.1 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Maui: up .
Balt: Radio link working only sporadically but more frequently
than usual..
Fla: up, but atill small breaks in communication
DATA:
Baltimore: Presumably OK
Florida: OK, periodic, short missing intervals.
Atlanta: OK
Maui: OK
SONICS: Some missing data; heater cycles last evening
RADIOMETERS: All OK.
TSOIL: OK, except Maui showed a few hours above 0 deg C.
LEVELS: OK
COMPASS: OK
VOLTAGES: OK
MELT PONDS: All melt ponds are ice covered. Most have dusting of snow.
LEADS: No new leads.
RIDGES: No new ridges.
- 689: Daily_Status, Site all, Wed 16-Sep-1998 07:59:46 AKDT, Daily_Status
9/15/98 1600 - 9/16/98 1600 GMT
CURRENT (0755 AKDT) WEATHER: Partly cloudy; Wind 6 m/s, easterly;
Temperature -9.5 C; Pressure 1017.8 mb; Wind chill -30 C
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Maui: up .
Balt: Radio link working only sporadically.
Fla: Up, but still small breaks in communication.
DATA:
Baltimore: Presumably OK
Florida: OK, periodic, short missing intervals.
Atlanta: OK
Maui: OK
SONICS: Brief episode of missing data during heater cycles last evening.
RADIOMETERS: OK
TSOIL: OK
LEVELS: OK
COMPASS: Among the three compasses, Atlanta, Maui, and Florida, the range
in reported wind direction is 60 degrees. I've taken new compass
sitings. How do I update those?
VOLTAGES: OK
MELT PONDS: All are ice covered.
LEADS: From the bridge there seems to be a new lead just northeast of Maui.
RIDGES: No new ridges.
- 692: Visit_Log, Site 2, Wed 16-Sep-1998 11:55:06 AKDT, Maui Evaluation
It appeared from the bridge this morning that there was much more open
water around Maui than yesterday, so Scott and I helicoptered out to evaluate
the situation.
The lead is now about 100 m wide, runs east-west and starts just north
of the Maui radiometers. The Maui side of the lead has thin ice about half way
across; the far half of the lead is open water. The sonics are not well
positioned to sample the flux from this lead, because the winds were easterly
and did not catch much fetch over the open water. Besides, the entire PAM
station is between the lead and the sonics. That is, the sonics are exposed
best to southerly and westerly winds.
Scott plugged in Rocky and found everything working OK. I measured
the compass heading to be 124 deg magnetic, while Rocky was showing 115 deg.
Maybe this is part of the spread in wind directions between the three
reporting stations that I mentioned in the Daily_Status report.
With all that new ice just meters from the station, Maui is at some
risk. If we get any convergence, all that ice could raft up onto Maui's
floe and make retrieving the station a pick and shovel job. We'll keep or eyes
on it.
- 693: Visit_Log, Site 1, Wed 16-Sep-1998 12:12:46 AKDT, Atlanta compass
Since Atlanta is only about 300 m from Maui, when Scott and I
finished our Maui visit, we had the helicopter drop us off at Atlanta.
We leveled the wind generator better.
I measured the compass direction as 314 deg magnetic. Rocky also
gave 314 deg. Thus, an erroneous compass offset cannot explain the the
discrepancies in wind direction I mentioned in the Daily_Status report.
Atlanta has a symmetric Gill sonic with, I presume, an orientation
arrow at the very top. We did not want to take the sonic down to look and
alter the data record, and we could not get high enough to look down from the
top. So we'll leave the sonic, possibly misoriented, and try to remember
to check it's orientation when we disaasemble the station.
- 694: Daily_Status, Site all, Thu 17-Sep-1998 08:01:47 AKDT, Daily_Status
9/16/98 1600 - 9/17/98 1600 GMT
CURRENT (0750 AKDT) WEATHER: Cloudy, blowing snow, poor visibility;
Wind 9 m/s, easterly; Temperature -6.2 C; Pressure 1016.2 mb;
Wind chill -27 C
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Maui: up .
Balt: No communication in last 24 hours.
Fla: Up, but still small breaks in communication.
DATA: Baltimore: Unknown
Florida: OK, periodic, short missing intervals.
Atlanta: OK
Maui: OK
SONICS: Extensive episodes of missing data during heater cycles.
RADIOMETERS: OK, though may be frosted late in the day yesterday. Will check
at Florida.
TSOIL: OK
LEVELS: OK
COMPASS: OK
VOLTAGES: OK
MELT PONDS: All are ice covered; now most have a dusting of snow
LEADS: Lead just north of Maui has opened to 100 m with 50 m on far side open
water. Maui is right on the edge of this, but its sonic is facing the
opposite direction. In other words, winds coming across the lead to the
station would come across the entire PAM station and into the back
side of the sonic.
RIDGES: No new ridges.
- 695: Daily_Status, Site all, Fri 18-Sep-1998 12:23:10 AKDT, Daily_Status
9/17/98 1600 - 9/18/98 1600 GMT
CURRENT (0730 AKDT) WEATHER: Wild; cloudy; drifting snow, poor visibility;
Wind 10 m/s, southeasterly; Temperature -0.2 C;
Pressure dropping like a rock to 999.9 mb; everything is wet
BASE: Pampoll up
Shebop up
STATIONS: Small breaks in communication with all in last 24 hours.
Atl: up
Maui: up .
Balt: No communication in last 48 hours.
Fla: up
DATA: Baltimore: Unknown
Florida: OK
Atlanta: OK
Maui: OK
SONICS: Generally good; heating at Maui yesterday morning.
RADIOMETERS: May have water droplets on them; we'll check at Florida
TSOIL: OK
LEVELS: OK
COMPASS: OK
VOLTAGES: OK
MELT PONDS: All covered with a dusting of snow
LEADS: Lead just north of Maui remains open and may have widened.
RIDGES: No new ridges.
SURFACE: Many large, linear snowdrifts. All melt ponds that were gray two
days ago now are dirty white from the blowing snow.
- 696: Visit_Log, Site 4, Fri 18-Sep-1998 16:57:43 AKDT, Florida TRH/Compass
We noticed in taking a quick look at all the staions that the Florida TRH and
compass data were bad or missing. We visited Florida twice this afternoon to
check the problem. On the first visit we looked for obvious things like loose
connectors or water in the connectors. (Today was nasty with driving wind,
temperatures hovering around zero, and mist wetting everything.) Nothing
seemed wrong but, at the station, Rocky still gave the flaky TRH and
compass values that we saw on SHEBOP.
We, thus, pulled the TRH and compass sensor package, and Scott looked it
over in the Met Hut, checking continuity and for loose connectors inside
the housing. Again he found nothing obviously wrong.
Finally, we speculated that since the main cable also supplies power for
the sonic heater, maybe the continual heating caused by the weather (more
on this later) was interferring with TRH and compass. So we went back to
Florida and reintalled the unit but without the sonic heaters connected.
No change in Rocky's readings or in SHEBOP`s.
While we were at Florida the first time, I cleaned clear ice and water off all
four radiometer domes. The pygeometers had mostly water. The pyranometers
had a pretty good coating of clear ice and dripping water. Presumably, the
radiometers at all the stations look like this
There was also a casing of about 1/4 inch of clear ice all over the sonic
probe. I freed most of this with the plastic end of the pastel feather
duster.
This evening the mystery deepened. Maui is showing the same symptoms as
Florida. and they started at roughly the same time: 8 a.m. AKDT.
- 697: Daily_Status, Site all, Sat 19-Sep-1998 08:00:33 AKDT, Daily_Status
9/18/98 1600 - 9/19/98 1600 GMT
CURRENT (0800 AKDT) WEATHER: Even wilder; cloudy; drifting snow,
poor visibility; Wind 12 m/s, easterly; Temperature -2.3 C;
Pressure 994.5 mb; Wind chill -27 deg C
BASE: Pampoll up
Shebop up
STATIONS: Data gaps in all stations around 1300 AKDT.
Atl: up
Maui: up .
Balt: No communication in last 72 hours.
Fla: up
DATA: Baltimore: Unknown
Florida: Missing TRH and compass.
Atlanta: OK
Maui: Missing TRH and compass and most sonic data.
SONICS: Florida: Was transmitting despite the ice casing yesterday.
Atlanta: Looking good
Maui: Looking bad
Baltimore: Looking but not seeing
RADIOMETERS: Most are probably ice-covered. Florida was severely iced
yesterday afternoon.
TSOIL: Maui reading above 0 deg C.
LEVELS: Level y at Maui showed a step change yesterday morning.
COMPASS: No record from Florida or Maui
VOLTAGES: OK
MELT PONDS: All covered with a dusting of snow
LEADS: Lead just north of Maui remains open.
RIDGES: No new ridges.
SURFACE: Got a little darker yesterday as the high temperature and blowing
snow wetted the surface and preferrentially reexposed the melt ponds.
SUMMARY: The weather has us grounded for a third day. We really need to get
out to find Baltimore because the ice has covered a lot of ground in the last
three days. It may not be where we last saw it. We can currently get
to Maui only by helicopter, too. So the problems we are seeing there may not
get the attention they deserve either. We crossed 80 deg North yesterday
evening.
- 698: Daily_Status, Site all, Sun 20-Sep-1998 17:30:17 AKDT, Daily_Status
9/19/98 1600 - 9/20/98 1600 GMT
CURRENT (0845 AKDT) WEATHER: Cloudy; Wind 2 m/s, southerly;
Temperature -3.4 C; Pressure 1001.4 mb
BASE: Pampoll up
Shebop up
STATIONS: Data gaps in all stations 1700-1800 AKDT.
Atl: up
Maui: Up but see site Visit_Log. .
Balt: No communication in last 4 days.
Fla: up
DATA: Baltimore: Unknown
Florida: TRH and compass not on station
Atlanta: OK
Maui: Missing TRH, compass, and u sonic data.
SONICS: Florida: OK
Atlanta: OK
Maui: Little or no u
Baltimore: ?
RADIOMETERS: OK
TSOIL: Maui reading above 0 deg C because it was in water (See site Visit_Log.)
LEVELS: Maui showed catastropic changes between 0200-0400 GMT Sept. 20
COMPASS: No compass installed at Florida, so wind direction is off;
no compass data from Maui.
VOLTAGES: OK
MELT PONDS: Snow covered but slushy
LEADS: Lead just north of Maui closed, but several-kilometer-long lead opened
at northern boundary of floe; 1 km north of ship.
RIDGES: We saw from the bridge this morning that the lead at Maui, which
was 100 m wide two days ago had closed and there was obvious ridging.
The station configuration had obviously changed appearance. See the
site Visit_Log.
SURFACE: Snow firmed up over night but was still slushy in the low spots, where
seawater probably has infiltrated under the weight of the new snow.
- 699: Visit_Log, Site 2, Sun 20-Sep-1998 17:46:52 AKDT, Maui's Peril
THE PERILOUS LIFE OF PAM SLED #2, CHAPTER 4
We saw from the bridge at 9 a.m. today that the lead just north of Maui
had closed and there was now ridging. The radiometer stand looked out of
place. So since the weather had calmed down a bit, Scott, Jumper, and I
went by helicopter to investigate.
We found that the very small floe Maui was on had rotated 90 degrees
clockwise and had ridged right under the radiometers. The weight of the new
ice had depressed the base of the radiometer stand and the sled so that the
feet of the stand and the runners of the sled were in seawater pooled on the
ice. The main tripod was high and dry on another floe. There was no
rebuilidng the station in that rubble field, so we took it apart and slung
it back to the ship.
The key at Maui went off at about 1830 GMT on September 20.
Amazingly, we retrieved all the sensors and cables undamamged, although
the PVC pipe carrying the cable was under water. The only possible
damage may have been to the radiometer stand, which was a little bent. But
considering that this was the same station eaten by a pressure ridge at
Cleveland, that damage may have already been there.
Scott commented that maybe the helicopter shouldn't deposit this unlucky sled
on the deck of the Des Gros. Besides its adventure at Cleveland, this sled
had to be moved because of ice motions when it was at Seattle, and was saved
once before from imminent immersion at Maui.
- 700: Visit_Log, Site 3, Sun 20-Sep-1998 18:06:30 AKDT, Baltimore antenna
With the better weather today, we had a chance to get up in the helicopter
to look for Baltimore, which we had not heard from in 4 days. After the storm
of the last 4 days, we were not sure even where the station might have drifted
or what shape it was in, considering Maui's fate. But we found it fairly
easily almost where we left it, 10 km at bearing about 100 degrees. As we
landed, the sun came out, the helicopter pilot turned of his engine, and
you couldn't have asked for a more serene setting. Baltimore was saftely
perched in the middle of a solid, 70-m diamater floe with newly ridged ice east
and south and open water north and west.
The TEG was still running although the propane bottles had been switched 2
weeks ago today. There was just a bit of clear ice on the down-looking
pyranometer, which I cleared. The ATI sonic was also coated with 1/4 inch
of clear ice, but the transducer faces were clear. Wow, those sonic heaters
are potent. I knocked most of the ice off the sonics. Scott swapped flash
cards and confirmed with Rocky that the station was still recording.
We removed the omnidirectional antenna and installed the Yaggi. In lining it
up though, we may have identified the problem. There`s a Mt. Shasta type
rubble pile in a direct line between the sled and the ship about 600 m away.
We can see the ship around that pile but not above it, but its not clear that
the PAM antenna can see the ship's antenna. Does the line of site between
antennas need to be clear? Jumper's suggestion was to chop down that rubble
pile with an ice chisel, the only tool of destruction we had with us. That'd
take about 4 hours.
Back on the ship, we were still getting no data by radio from Baltimore.
We're implementing John's plan of letting the station run out of propane to
see how long it will run on just the solar panels and the wind generator.
Whatever, we'll have to pull that station in by next weekend.
- 701: TRH, Site 4, Sun 20-Sep-1998 20:26:53 AKDT, Florida ( & Maui ) TRH
On Sat 9/19 we brought the TRH sensor aboard to troubleshoot the problem
of erroneous temp, RH and compass readings. After plugging the
sensor into the spare box the readings were the same as at Florida. I
allowed the sensor to run during dinner in the hope that if it was
saturated it would dry itself. After dinner the values were identical
to what they had been. I also noticed that the same values were given
after I had unplugged the sensor. Prior to plugging in the sensor the
values were NaN, so why not NaN after. I found that by powering down
and restarting, the sensor values were correct so I assumed there is a
buffer somewhere that retains the "bad" data until powered down. Is
this the case??
At approx 16:00 AKDT we reinstalled the TRH unit at Florida and all
is well. Tomorrow we will change propane, flash card and TEG nozzle.
Note : The TRH problem also occured at Maui as previously noted. By
this morning Maui was reading proper T, Rh and compass values. I guess
my thought about the buffer isnt correct since Maui fixed itself. Any
ideas??
- 702: Daily_Status, Site all, Mon 21-Sep-1998 12:48:08 AKDT, Daily_Status
9/20/98 1600 - 9/21/98 1600 GMT
CURRENT (0800 AKDT) WEATHER: Cloudy; Light wind, 1 m/s, southeasterly;
Temperature -4.8 C; Pressure 1006.7 mb
BASE: Pampoll up
Shebop up
STATIONS:
Atl: up
Maui: Decommisioned about 10:30 a.m. AKDT .
Balt: Up, though no communication even with Yaggi antenna
Fla: up
DATA: Baltimore: OK from flash card
Florida: OK
Atlanta: OK
Maui: Missing TRH, compass; most others questionable in light of its
final few tramatic hours
SONICS: Florida: OK though brief heating about 1700 AKDT Sept. 20
Atlanta: OK
Maui: Questionable
Baltimore: OK
RADIOMETERS: OK
TSOIL: OK
LEVELS: OK
COMPASS: OK
VOLTAGES: OK
MELT PONDS: Snow covered but still obviously dark.
LEADS: A variety of activity too changable to recount.
RIDGES: None that impact us.
- 703: Visit_Log, Site 3, Mon 21-Sep-1998 18:38:08 AKDT, Baltimore Decommissioned
After Jumper saw Baltimore yesterday, he was concerned about its survival.
It was sitting on a 70-m diameter floe that was about 30 cm thick. There
was open water on two sides and ridged ice on the other sides. The area was
fairly active. Jumper worried that if Baltimore`s floe cracked, there would no
place nearby to land a helicopter. Since today was a decent flying day while
the forecast is for deteriorating weather tomorrow, we decided to fetch
Baltimore home today. The key went off at the station at 17:20 GMT today,
September 21.
In retrieving the station, we lost very little equipment. The in-ice
temperature sensor and the heat flux plate were frozen in the ice and
irretrievable; we cut those cable. We also had to cut out the middle section
of the ATI sonic cable. For some reason, this had not been threaded through
the PVC pipe but had been wound around the outside and also had become frozen
in the ice.
Our decision was right. As we worked, the northeast corner of the floe,
10 m from where the helicopter landed, was crunching inward under pressure.
- 704: Daily_Status, Site all, Tue 22-Sep-1998 08:06:12 AKDT, Daily_Status
9/21/98 1600 - 9/22/98 1600 GMT
CURRENT (0800 AKDT) WEATHER: High clouds, good visibility;
Wind, 4 m/s, easterly; Temperature -6.1 C; Pressure 1002.9 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: up
Maui: No more .
Balt: Turned off at 17:30 GMT on the 21st.
Fla: up
DATA: Baltimore: OK from flash card
Florida: OK
Atlanta: OK
SONICS: OK
RADIOMETERS: OK. No obstructions at Florida, for example, yesterday
afternoon.
TSOIL: OK
LEVELS: OK
COMPASS: OK
VOLTAGES: OK
MELT PONDS: Snow covered but still obviously dark.
LEADS: No new ones near us.
RIDGES: None that impact us.
- 705: Visit_Log, Site 4, Tue 22-Sep-1998 08:15:15 AKDT, Florida Service
New propane, new TEG nozzle, swapped flash card at Florida afternoon (AKDT) of
September 21.
Checked for ice on instruments and found noon.
Signed,
I. B. Brief
- 706: Daily_Status, Site all, Wed 23-Sep-1998 12:34:33 AKDT, Daily_Status
9/22/98 1600 - 9/23/98 1600 GMT
CURRENT (0745 AKDT) WEATHER: Cloudy, good visibility;
Wind, 3 m/s, easterly; Temperature -8.0 C; Pressure 1014.8 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: Probably up but stopped communicating 1400 GMT
Maui: No .
Balt: No
Fla: Up
DATA: Florida: OK, gap between 1500-1600 GMT.
Atlanta: OK, gap starting at 1400 GMT and continuing.
SONICS: Continuous heating cycles that are affecting the voltages and
currents and ,evidently, the compass.
RADIOMETERS: OK.
TSOIL: OK
LEVELS: OK
COMPASS: Atlanta signal looks unusual, as if the sonic heating signal was
affecting the compass reading. Florida has some of that same
quality, but it`s not quite as pronounced.
VOLTAGES: Lots of cycling, presumably caused by the sonic heaters.
MELT PONDS: Some have reappeared as darker spots with the warming and
drifitng snow of a few days ago.
LEADS: No new ones near us.
RIDGES: No new ones that affect us.
- 708: Visit_Log, Site 1, Wed 23-Sep-1998 20:19:02 AKDT, ATL Lost Comms & Maintenance
9/23/98
At about 6am AKDT we lost comms with Atl. Pampoll was checked and
found to be alive and working. We could communicate with Florida.
After observing the recent plots for Atl using iplot() it was
decided that the site was probably running but not communicating.
Voltages and currents were OK, although it was apparent the
sonic heaters were running constantly for hours, producing large
spikes in much of the data.
We decided to go ahead and do the propane, flash card and TEG nozzle
service on ATL since it was due Sat 9/26. Ed and Scott made their
first snowmobile excursion to Atlanta. The P,F,T swaps went fine but
the system would not ignite. There was no spark at the ignitor. We
wound up using the butane torch to light the system manually.
The problem with the radio is a mystery. When we arrived, the clear
to send light was flashing. When we connected Rocky and attempted
to communicate we got a message, "Unable to connect, auxillary console
in use". Powering down and back up solved this problem and the
comms problem as well.
Note: After returning to Shebop and attempting to FLASH the card, there
was one day of data on it, day 255, (today is JD 266). I dont know what
happened,and thought the system would not run without writing to the card.
???? ideas anyone... Thank you and have a good day SA
- 709: Daily_Status, Site all, Thu 24-Sep-1998 11:47:53 AKDT, Daily_Status
9/23/98 1600 - 9/24/98 1600 GMT
CURRENT (0735 AKDT) WEATHER: Cloudy, snowing;
Wind, 2 m/s, northwesterly; Temperature -3.8 C; Pressure 1013.7 mb
BASE: Pampoll up
Shebop up
STATIONS: Atl: Up
Fla: Up
DATA: Atlanta and Florida OK, but both have short episodes of missing data.
SONICS: OK, but both show sonics heating between 2000 GMT Sept 23 and 0500
Sept 24.
RADIOMETERS: OK.
TSOIL: OK.
LEVELS: OK.
COMPASS: Both stations have some unusual spikes.
VOLTAGES: OK.
LEADS: No new ones near us.
RIDGES: No new ones near us.
- 710: Daily_Status, Site all, Fri 25-Sep-1998 11:31:22 AKDT, Daily_Status
9/24/98 1600 - 9/25/98 1600 GMT
CURRENT (0740 AKDT) WEATHER: Cloudy, good visibility; recent dusting of snow;
Wind, 2 m/s, northeasterly; Temperature -5.0 C; Pressure 1011.9 m.
BASE: Pampoll up.
Shebop up.
STATIONS: Atl: Up.
Fla: Up.
DATA: Fla: OK.
Atl: Data gap 0600-1200 GMT Sept. 25 and many frequent holes
elsewhere.
SONICS: OK.
RADIOMETERS: OK.
TSOIL: OK.
LEVELS: OK.
COMPASS: OK.
VOLTAGES: OK.
MELT PONDS: All have a snow cover but most still appear grayer than
snow-covered, older sea ice.
LEADS: No new ones near us.
RIDGES: No new ones near us.
- 711: Daily_Status, Site all, Sat 26-Sep-1998 12:08:01 AKDT, Daily_Status
9/25/98 1600 - 9/26/98 1600 GMT
CURRENT (0745 AKDT) WEATHER: Cloudy; recent dusting of snow;
Winds light; Temperature -7.0 C; Pressure 1011.0 mb.
BASE: Pampoll up.
Shebop up.
STATIONS: Atl: Up.
Fla: No communication and presumably down at 0330 GMT on the 26th
(Actually, Scott and I verified this morning at 1800 GMT that it
was down.)
DATA: Fla: No data since 0330 GMT.
Atl: Several big data gaps.
SONICS: OK, a few heating cycles.
RADIOMETERS: OK.
TSOIL: OK.
LEVELS: OK.
COMPASS: OK.
VOLTAGES: OK.
MELT PONDS: Gray-white.
LEADS: East-west lead 1 km north of the ship and 500 m north of Florida
remains open and active (as it has seemingly forever) and, in fact,
loops around north and northeast of Atlanta.
RIDGES: No new ones near us.
- 712: Daily_Status, Site all, Sun 27-Sep-1998 08:32:12 AKDT, Daily_Status
9/26/98 1600 - 9/27/98 1600 GMT
CURRENT (0825 AKDT) WEATHER: Cloudy; dusting of snow overnight;
Wind 4 m/s; Temperature -9.0 C; Pressure 1009.1 mb.
BASE: Pampoll up.
Shebop up.
STATIONS: Atl: Up but communications infrequent.
Fla: Mostly down.
DATA: Fla: Only a few hours of data between down times.
Atl: Several big data gaps.
SONICS: Mostly missing.
RADIOMETERS: OK. While Florida was down on the 25th and 26, its radiometers
collected a lot of ice. After we turned it back on yesterday
afternoon, the fans and heaters were able to clear the ice off the
down-facing domes. I cleaned the ice off the up-facing domes with
alchohol yesterday evening--about 0215 GMT on the 27th.
TSOIL: OK.
LEVELS: OK.
COMPASS: OK.
VOLTAGES: Florida is evidently not charging the battery.
MELT PONDS: Gray-white.
LEADS: East-west lead 1 km north of the ship and 500 m north of Florida
now has looped around down the entire east side of the floe,
passing roughly 100 m east of Atlanta.
RIDGES: No new ones near us.
- 713: Visit_Log, Site all, Mon 28-Sep-1998 07:16:58 AKDT, Summary of Site Characteristics
Here is a summary of PAM site characteristics in September. The date
refers to the date when I measured the angles for sonic orientation and
bearing.
Altanta Baltimore Maui Florida
Date 9/16/98 9/20/98 9/16/98 9/20/98
Snow depth (cm) 6 9 5 6
Approx. ice thickness 0.9 0.3 0.3 4
(m)
Bearing from ship 84 115 56 12
(deg true)
Range from ship (km) 1.5 10 1.1 0.47
Sonic type Sym. Gill ATI ATI Asym. Gill
Disturbed sector in -74, -167 -115 +170 to -170 -84 to -94
sonic coordinates (deg)
Sonic head-on angle 72 54 242 346
(deg true)
Sonic height (m) 3.48 2.92 3.26 3.50
TRH intake height (m) 1.84 1.90 2.30 1.96
Down-looking radiometer 1.90 1.82 2.13 1.90
height (m)
ATLANTA: Ridged ice, refrozen leads, melt ponds north and northeast;
smoother ice and melt ponds southeast, south, and west.
BALTIMORE: Surrounded by ridged ice and refrozen leads; very broken all around.
MAUI: Small floe; broken ice all around; refrozen, dark melt ponds and leads;
radiometers over new ice.
FLORIDA: Sitting on a hummock higher than the surroundings; melt ponds, leads,
broken ice north and west; hummocks east; camp south.
- 714: Daily_Status, Site all, Mon 28-Sep-1998 11:45:01 AKDT, Daily_Status
9/27/98 1600 - 9/28/98 1600 GMT
CURRENT (0745 AKDT) WEATHER: Cloudy; snowing and snow overnight;
Wind 4 m/s, westerly; Temperature -7.6 C; Pressure 1006.5 mb.
BASE: Pampoll up.
Shebop up.
STATIONS: Atl: Presumable up but communications stopped at 1030 GMT on 28th
Fla: Down.
DATA: Fla: Only 4 hours of data.
Atl: OK
SONICS: OK.
RADIOMETERS: OK.
TRH: Very intersting series of three cycles of high and low in TRH at Atlanta
between 2200 on the 27 and 0900 GMT on the 28th. Also show up in
incoming longwave. With only one station reporting, I don't know
whether this was passing clouds or effects of the plume from the
lead just east of Atlanta.
TSOIL: OK.
LEVELS: OK.
COMPASS: OK.
VOLTAGES: Atl: Declining before we lost it.
Fla: Battery may not be charging.
LEADS: East-west lead 1 km north of the ship and 500 m north of Florida
has closed a bit. Its extension north and east of Atlanta is still
open.
RIDGES: No new ones near us.
- 715: Daily_Status, Site all, Tue 29-Sep-1998 11:38:12 AKDT, Daily_Status
9/28/98 1600 - 9/29/98 1600 GMT
CURRENT (0650 AKDT) WEATHER: Cloudy; snowing and snow overnight;
Wind 5 m/s, northwesterly; Temperature -7.9 C; Pressure 1012.6 mb.
BASE: Pampoll up.
Shebop up.
STATIONS: Atl: Up.
Fla: Up.
DATA: Fla: OK.
Atl: Two long gaps, one at start and one at end of period.
SONICS: OK, some heating cycles.
RADIOMETERS: OK.
TRH: OK.
TSOIL: OK.
LEVELS: OK.
COMPASS: Generally OK, though some unusual spikes.
VOLTAGES: Atl: Declining again during the night before we lost it.
Fla: ?
LEADS: About the same.
RIDGES: No new ones near us.
SURFACE: Beginning to see a lot of snow accumulation in low areas. Hummocks
tend to be scoured of snow.
- 716: Daily_Status, Site all, Wed 30-Sep-1998 11:41:31 AKDT, Daily_Status
9/29/98 1600 - 9/30/98 1600 GMT
CURRENT (0655 AKDT) WEATHER: Cloudy; snow overnight;
Wind 3 m/s, southerly; Temperature -11.4 C; Pressure 1016.1 mb;
Wind chill -27 C.
BASE: Pampoll up.
Shebop up.
STATIONS: Atl: Up.
Fla: Up.
DATA: Fla: OK.
Atl: Gap at end of period, starting 1030 GMT on the 30th.
SONICS: Generally OK; some heating cycles; Florida dubious last several hours
of period
RADIOMETERS: OK.
TRH: OK.
TSOIL: OK.
LEVELS: OK.
COMPASS: OK.
VOLTAGES: Atl: Declining again during the night before we lost it, again
when it hit about 11.7 volts.
Fla: OK.
LEADS: About the same.
RIDGES: No new ones near us.
- 717: Visit_Log, Site 1, Wed 30-Sep-1998 12:29:34 AKDT, Decommissioned Atlanta
John, Tom, Dean and Andreas Plough(?) visited Atlanta this morning to
dismantle the site. The system was shut down, apparently because the
battery voltage was too low. As a consequence, the sonic, radiometers,
and hygrothermometer intake were all iced. The sonic was heavily rimed;
the radiometers were partially rimed although the incoming SW radiometer
had heavy rime with the radiation shield completely covered. Around
10:30 am local time, John shut down the station.
We measured various parameters:
Height of upwelling radiation shields 191 cm
Height of hygrothermometer intake 169 cm
Height of sonic boom (center) 273 cm
The sled was oriented in line with the mast, about 20 ft away at
azimuth 340 magnetic. Looking toward the mast, the hygrothermometer
boom was at 310 mag (pointing toward the SE); the radiometer boom
was at 225-180=45 magnetic (pointing toward the SW); and the sonic
boom was at 42+180=222 magnetic (pointing toward the NE).
The sonic was serial number 0067 (symmetric).
The Campbell data logger box was number 1.
- 718: Visit_Log, Site 4, Wed 30-Sep-1998 19:59:22 AKDT, Partial decommission of Florida
This afternoon we began to decommission Florida. We removed the
hygrothermometer, sonic, Campbell data logger, and radiometer array
from the station. The sonic was heavily rimed; the lw radiometers
were clear and the sw radiometers had very light frost; and the
intake to the hygrothermometer was moderately rimed.
The sonic was the asymmetrical NCAR unit (#0087).
Campbell Logger box #3
Heights:
to lower radiometer: 188cm
to intake of trh: 182cm
to boom of sonic: 294cm
Azimuths:
looking at trh boom E of sta: 233deg
looking at rad boom S of sta: 327deg
looking from sled to sonic: 15deg
looking from sonic to met: 133deg
looking from sone to apl met: 98deg (first obstruction)
ie sonic clear of obstructions: 195 to 98deg looking outward.
looking toward ship: 160deg
- 719: Hygrothermometer, Site , Thu 01-Oct-1998 17:46:44 AKDT, Hygrothermometer intercomparison
John and I began the hygrothermometer intercomparison today. I
mounted the four hygrothermometers on the rad beam about a meter
from the mast and pointing in the direction of the TRH boom. We
took the Atlanta sled to Florida and then brought out the electronics
boxes from Maui and Baltimore. We connected the hygrothermometers
in the order that they were on the first week of August:
Atlanta (stn 1) TRH#3
Maui (stn 2) TRH#6
Baltimore (stn 3) TRH#5
Florida (stn 4) TRH#7
I hoped to also include the spare hygrothermometer in this
intercomparison, but it would require a new configuration on one of
the EVE boxes to ingest a second set of TRH data.
At first, I connected TRH#3 to Atlanta, but I corrected this after
lunch, perhaps by 1400. We also are not receiving the TRH data from
Maui. John suspects a loose connector at EVE.
98/10/01 19:40 AKDT Maui repaired and working.
Problem was in the electronics box, see specific log entry
- 720: , Site , Thu 01-Oct-1998 18:00:44 AKDT, Surface temperature and heat flux sensors
I chipped out the surface PRT and heat flux sensors at both Atlanta
and Florida. At both sites the sensors were a few inches below the
surface of the ice, but they were in grooves that extended up to the
top of the ice. Thus the data are somewhat suspect in terms of
representing the undisturbed snow/ice surface. In addition the heat
flux plate at Atlanta was no longer horizontal. It was canted at
perhaps 30 degrees above horizontal.
- 721: sled-2, Site , Thu 01-Oct-1998 19:55:46 AKDT, Maui EVE box problem w/sbus port
98/10/01 19:40 AKDT
Repair of PAM Electronics box from Maui.
This box is currently working in the trh intercomparison.
Problem:
SBUS comms bad. TRH was not coming in properly,
maybe a message or two, then nothing.
It is still possible that a problem may be in
trh #6, but what got things running was swapping
the input port inside the EVE box to the Aux port
(GPS not connected) and swapping the 232/485
converter. Still using tyCo/1.
ie: either bad sbus front panel port or phone
cord.
- 722: Hygrothermometer, Site all, Fri 02-Oct-1998 13:59:10 AKDT, Hygrothermometer serial numbers vs station
Record of station hygrothermometer usage:
Station 1
Start 1/15/98 1040 AKST #0004
1/15/98 1055 AKST 2/2/98 1200 AKST #0006
2/9/98 1540 AKST End #0003
Station 2
Start ? #0006?
12/27/97 1130 AKST 2/5/98 2030 AKST #0005
4/6/98 1440 AKDT End #0006
Station 3
Start 12/24/97 1130 AKST #0003
12/24/97 1130 AKST 1/13/98 1120 AKST #0006
1/13/98 1140 AKST 3/30/98 1545 AKST #0007
3/30/98 1610 AKST 5/25/98 1415 AKDT #0001
5/25/98 1420 AKDT End #0005
Station 4
Start 12/31/97 1400 AKST #0007
12/31/97 1440 AKST 1/7/98 2100 AKST #0003
1/7/98 2110 AKST 1/13/98 0915 AKST #0007
1/13/98 1820 AKST 1/15/98 0930 AKST #0006
1/20/98 1545 AKST 2/2/98 0940 AKST #0003
2/3/98 1320 AKST 2/25/98 1615 AKST #0006
2/25/98 1620 AKST 5/11/98 1440 AKDT #0005
5/11/98 1500 AKDT End #0007
Arranged by hygrothermometer:
#0001
3/30/98 1610 AKST 5/25/98 1415 AKDT Stn 3
#0003
Start 12/24/97 1130 AKST Stn 3
12/31/97 1440 AKST 1/7/98 2100 AKST Stn 4
1/20/98 1545 AKST 2/2/98 0940 AKST Stn 4
2/9/98 1540 AKST End Stn 1
#0004
Start 1/15/98 1040 AKST Stn 1
#0005
12/27/97 1130 AKST 2/5/98 2030 AKST Stn 2
2/25/98 1620 AKST 5/11/98 1440 AKDT Stn 4
5/25/98 1420 AKDT End Stn 3
#0006
12/24/97 1130 AKST 1/13/98 1120 AKST Stn 3
1/13/98 1820 AKST 1/15/98 0930 AKST Stn 4
1/15/98 1055 AKST 2/2/98 1200 AKST Stn 1
2/3/98 1320 AKST 2/25/98 1615 AKST Stn 4
4/6/98 1440 AKDT End Stn 2
#0007
Start 12/31/97 1400 AKST Stn 4
1/7/98 2110 AKST 1/13/98 0915 AKST Stn 4
1/13/98 1140 AKST 3/30/98 1545 AKST Stn 3
5/11/98 1500 AKDT End Stn 4
- 723: Hygrothermometer, Site all, Sat 03-Oct-1998 15:16:30 AKDT, Swapped in new hygrothermometer
At 1310 AKDT, October 3, we swapped in hygrothermometer #0001
(case is labeled #0004) in place of #0003 (Station 1).
- 724: Base_Software, Site base, Tue 01-Dec-1998 10:09:02 MST, Post field: merged packet data
The packet files from the "flash" and "polled" directories on
shebop were read from the backup tape that Tom/John made just
before shutdown. These files were merged with the ones
we had here on /net/pam, and the data copied into the netcdf
files.
Therefore, the netcdf files here at NCAR should be complete.
- 725: Sonic, Site 3, Tue 08-Dec-1998 14:32:02 MST, ATI sonic from MAUI v vector bent
during unpacking, the ati sonic v vector was discovered to be bent.
it is not known at this time how long it has been bent. v vector is
reporting 2 M/S in the lab, and v samples is low (15 instead of 20).
Three possibilities are:
1.) it happened during a bear visit (last one at maui was about
one month before teardown
2.) it happened during teardown
3.) it was man handled in Customs
- 726: Base_Software, Site , Wed 09-Dec-1998 15:50:14 GMT, Preliminary FSL data sets available
To: Christopher Fairall ,
Ed Andreas
,
Martin Mulhern
,
Peter Guest
Cc: John Militzer ,
Nimal Gamage
Subject: preliminary data sets
Date: Fri, 4 Dec 1998 09:28:43 -0700
Hi all!
I just put two files of data on our anonymous location, one has hourly means
and the other has daily means. These files combine the data from the sonics
and the "slow" sensors at the met tower site. The files have averages of all
the instruments and all 5 levels (when relevant) at the tower site for the
entire year. This includes sensible heat fluxes, u*, radiative fluxes,
etc., as well as surface pressure & true wind direction. It will not
include anything from the ophir, nor does it include the Barnes or the
original relative humidities (there are columns for the latter two, so they
will be in the final version after more calibrations, etc.). The
calibrations include all pre-experiment calibrations (e.g., CMDL
calibrations of radiometers), but not the intercomparisons during the field
program. Eppley-derived surface temperatures use emissivity of 0.99.
Tower-orientation & pressure is obtained from Florida adjusted for the
various moves of this site. The daily averages for sonic data exclude the
times flagged as anomalous (manually and automatically). These are fresh
out of a new/revised matlab program, so let me know if there are problems.
I envision that this would not be the public release data files, but rather
the files that we PIs work from and that NCAR personell can use for QC work.
Let me know if there are other parameters, formats, etc, you want in the
final version of these files. For instance, do you want the mean sonic
temperatures? How about the dome and case temperatures from the
radiometers? Should we also put in the ophir data and latent heat fluxes
once someone gets working on that? The file is already quite big, esp. with
all the sonic variances and structure functions. (Peter, note that u* and w
only have increased accuracy for about 30 days in the spring and after JD
221, as only this sonic data was processed after you made the request. When
the final sonics are reprocessed a final time, all data will have the
increased accuracy).
The files are tab-delimited text files, have headers for each column, run
from JD302 1997 - JD273 1998, and are called
prof_file_all.txt
prof_file_davg_all.txt
If you have any questions, just ask.
Ola
- 727: Sonic, Site 2, Wed 09-Dec-1998 15:25:47 MST, Maui sonic v
- Previous -
Next -
Index
| Graphic: | wind speed before Maui teardown located in file: /net/www/sssf/projects/sheba/logbook/log_00727-1.gif
I don't think that the ATI array was bent during the data collection for SHEBA.
As the attached plot shows, the wind speeds generally agreed between Maui and
Florida before and after the bear visit and just prior to Maui teardown.
However, Kurt has noticed that v on this sonic now has a 2.5 m/s offset, which
should show up on this plot if it were present.
Furthermore, Kurt noted that the vsamples are now low, but they were still
solidly 20 after the bear visit. (They were down to 0 the day before
teardown, but this probably is due to riming since usamples and wsamples
also are low - though not 0 - during this period. Also, open leads close
to the station were noted during this period which would have supplied
moisture for riming.) (vsamples is shown as the lowest line on this plot,
normalized by 20 to have it fit on scale.)
...Steve Oncley
- 728: LOG, Site , Mon 01-Feb-1999 13:29:54 MST, SHEBA ice camp staffing
Here is the list of PAM service personnel that Ed Andreas
obtained from the purser's office on the Des Gros.
Kurt Knudson 2 Oct - 16 Oct 1997
John Militzer 2 Oct - 20 Oct 1997
Ed Andreas 2 Oct - 1 Nov 1997
Kerry Claffey 2 Oct - 1 Nov 1997
Steve Semmer 16 Oct - 2 Nov 1997
Gordon Maclean 16 Oct - 2 Nov 1997
Chris Fairall 16 Oct - 25 Nov 1997
Jeff Otten 16 Oct 1997 - 14 May 1998
Janet Intrieri 26 Nov 1997 - 8 Jan 1998
Steve Semmer 7 Jan - 9 Jan 1998
Ann Keane 7 Jan - 19 Feb 1998
Dan Wolfe 17 Feb - 1 April 1998
Tony Delany 19 Feb - 11 Mar 1998
John Militzer 31 Mar - 23 April 1998
Ola Persson 31 Mar - 23 April 1998
Dominique
Ruffieux 31 May - 1 July 1998
Peter Guest 21 April - 14 May 1998
Ed Andreas 12 May - 2 June 1998
Dave Costa 12 May - 1 July 1998
Ola Persson 2 July - 11 Aug 1998
Kerry Claffey 3 July - 11 Aug 1998
Dave Costa 11 Aug - 9 Sept 1998
Peter Guest 11 Aug - 9 Sept 1998
Scott Abbott 9 Sept - 11 Oct 1998
Ed Andreas 9 Sept - 11 Oct 1999
Tom Horst 29 Sept - 11 Oct 1998
John Militzer 29 Sept - 11 Oct 1998
- 729: Sonic, Site all, Thu 11-Feb-1999 15:43:05 MST, Final ATI sonic serial numbers
11-Feb-1999
Kurt looked at the ATI sonics returned from SHEBA and found the
following:
Atlanta ATI was tagged S/N 980202 (ATI #1?) and the internal digital
serial number is also 980202. This sonic was removed from Atlanta in
August because of a failed v axis.
Maui ATI was tagged S/N 980302 (ATI #2) but the internal digital serial
number is 980303. This sonic was found to have a misaligned v axis.
Baltimore ATI was tagged S/N 980303 (ATI #3) but the internal digital
serial number is 980302.
From oncley@ale.atd.ucar.edu Tue Feb 16 16:15:13 1999
Subject: Re: ATI S/N
To: horst@atd.ucar.edu (Tom Horst)
> Steve:
>
> I found a note with the SHEBA ATIs stating that S/Ns 980203 and 980202
> had been swapped. Did you do this? Did you swap the external labels
> or change the internal serial numbers?
>
> Tom
>
As far as I know, we received the ATIs with the serial numbers in ROM
not matching the labels on the boom for these 2 units. I recall noticing
this before they were sent to SHEBA, but apparently forgot to do anything
about it. Kurt noticed that they were still mismatched upon return,
so I (yesterday) changed the ROM values to correspond with the boom label.
Since these serial numbers do not appear in the data stream, I assume that
the labels on the boom were used by folks in SHEBA to identify the sensors.
...Steve
- 730: LOG, Site 2, Thu 18-Feb-1999 14:05:17 MST, Seattle fetch
From horst Wed Feb 17 13:41:56 1999
Subject: Seattle fetch
I am continuing with the evaluation of the sonic tilts and have begun
looking at station 2. The plot of wind elevation vs azimuth for
Seattle from April 23 - May 30 shows a very prominent deviation for
winds from approximately ENE (the sonic boom pointed to the North).
The data indicate a positive elevation angle (positive vertical
velocity) of 1-2 deg for winds from 60 deg E of N and a negative
elevation angle of 1-2 deg for winds from 75 deg E of N. This feature
is present throughout the period. Does anyone recall any obstruction
or terrain feature to account for this?
Tom
From: guestps@ibis.met.nps.navy.mil (Peter S. Guest)
Subject: Re: Seattle fetch
Date: Wed, 17 Feb 1999 14:09:37 -0800 (PST)
Tom, I was there then. Unfortunately, I didn't get any close-up
pictures of the Seattle site. Drats! (I took 360 deg pictures of all
the other sites at least once!) I think I actually made it out to the
Seattle site only once, but Jeff Otten went out at least a couple more
times during this period. There was considerable lead activity; in
fact we tried several times unsuccessfully to reach the site toward
the end of my stay. Leads prevented us from getting there. I recall
there was a lead fairly close (10- 20 meters?) to the North. It was
very active and threw up several large chunks of ice. I think I recall
there was a large mound in about the ENE direction about 15 m away from
the tower, perhaps even closer. I remember because I climbed it to look
for polar bears. I would suspect this is causing the effects you note,
but I can't say for sure without an accurate direction fix from
pictures.
After a closer look, I found a couple of pictures from the ship's
bridge which show the Seattle site in the distance. There does appear
to be a new ridge to the north and a "bump" just behind and a little to
the left of Seattle from the bridge perspective. I think this (bump)
is about ENE from Seattle. Again, the view is not clear so I can't say
for sure, but it does seem to be consistent with my recollections
stated above. One thing I am sure of is that there was a lot of lead
activity and ridging very close to Seattle and it does not surprise me
that there were some 1-3 degree deviations in vertical wind speed. I
also know there were no huts or other man-made obstructions that could
be the cause. Hope this helps....
-Peter
Date: Wed, 17 Feb 1999 17:14:04 -0500
From: Ed Andreas
Subject: Re: Seattle fetch
I've described Seattle several times as a "fortress." It had broken
ice all around it at various distances. I was on the ice camp from May 12
through the end of May and found one photo I took of the Seattle PAM site
May 16. The view is eastward, not northeastward, but there is an obvious
ridge encroaching into the picture from the north, fairly close--within 50
meters. I'd say this is pretty good evidence that the offset you're seeing
is topographically controlled.
Peter was on the station just before me, and I shared duty with Dave
Costa. You might query them, too, for photos.
Ed
From horst Wed Feb 17 15:55:45 1999
Subject: RE: seattle fetch
Ed and Peter:
Thanks for the input. John also recalled the ridge to the north of
Seattle. His recollection is that the sled was perhaps to the WNW
of the station. Does that sound right to you?
What is really remarkable to me is the extremely distinct change in the
elevation angle of the wind from +2 deg to -2 deg over only a 10-15 deg
change in wind direction. A more complete description is roughly
azimuth elevation
50 deg 0 deg
65 deg 1.5 deg
70 deg 0 deg
75 deg -2 deg
85 deg 0 deg
Does that seem possible, given the terrain (icescape? help!)? I
certainly have no other explanation. I guess that I have spent too
much time collecting data over sites that resemble billiard tables.
Tom
From: "Persson, Ola"
Subject: RE: seattle fetch
Date: Wed, 17 Feb 1999 16:42:01 -0700
John and I set Seattle up on April 20. My logbook from that day says that
"320-338 deg true affected by sled". I also have a picture of Seattle on
April 20 towards about 15-20 degrees (assuming the sonic arm is due north)
showing substantial ice rubble/ridges about 40-50 m to the NNE. As Ed
describes it, Seattle was a "fortress", with extensive ice ridge rubble
especially close to the sonic in the NW through ENE directions (clockwise).
Unfortunately, the picture probably does not show the 65-75 deg sector. I
did find a slide I got from Dominique showing Seattle from the west. I'm
not sure if the contrast will be good enough to see details on the opposite
side of the tripod, but once I find a slide projector (they seem to have
been packed for our move), I'll let you know.
Ola
Date: Thu, 18 Feb 1999 08:34:56 -0500
From: Ed Andreas
Subject: RE: seattle fetch
The changes in elevation angle do seem pretty wild, but I have never
done an analysis like yours. So who knows how to explain it? I have seem
similary dramatic changes in the drag coefficient with angle of attack over
sea ice.
A logbook entry (also should be in the PAM electronic long) on May
30 states that the Seattle sled was -36 degrees from head-on to the
sonic--i.e. northwest of the tripod.
Ed
- 731: , Site , Fri 26-Mar-1999 08:57:32 MST, Tsoil post cals
Post cals on the Tsoil probes have been completed. A formal
report will be included in Tom's post SHEBA report. Below are
a few comments about the post cal.
(1) During the project 2 probes were lost so we had 3 remaining ones
to test.
(2) The probes were calibrated over the range of 10 to -40 C.
(3) The average error over the range of -20 to 10 C was less than
0.1 C.
(4) Time was spent trying to determine the response of the tsoil
at Clev/Sea/Maui after it was setup in April.
Here is a quick review:
(a) The original probe deployed with Cleveland, STP0016,
was not retrieved during the removal of Cleveland.
(b) The spare probe, NCAR002, was used when Cleveland
was next setup in April.
(c) It has been determined that the series resitor pack
which was calibrated with probe NCAR002 was not changed
in the logger, CR10X, box. This was the cause of the
temperature offset. The calibration coefficients had
been changed to the correct values.
(d) In August, the calibration coefficients were changed
again with the anticipation of a new spare probe
being used. Unfortunately, the new probe was not
wired the same way as the SHEBA probes so it was
not used.
(e) The calibration coefficients were not changed back to
sensor NCAR002 values. Therefore, a new offset was
introduced.
(f) Based on the post calibrations and the information above,
the data can be corrected.
- 732: Sonic, Site all, Wed 31-Mar-1999 16:26:56 MST, sonic azimuths
I have been reviewing and modifying the sonic orientation file
/net/pam/projects/SHEBA/sonics/orientation.dat.
I tested the orientations for Oct through early Jan by plotting wind
direction differences with Florida as the reference. Data were used
only when sonic.samples exceeded 99.5% and I also clipped the differences
at +/- 50 deg. A summary of the data follows:
Another Time Series (ats):
Observations: 25941 on 3 channels
dir dir dir
Min. : -50.000 Min. :-5.0000e+01 Min. : -50.000
1st Qu.: -1.556 1st Qu.: 8.7790e-02 1st Qu.: -1.861
Median : 2.209 Median : 3.3890e+00 Median : 3.980
Mean : 1.464 Mean : 2.7720e+00 Mean : 2.330
3rd Qu.: 5.507 3rd Qu.: 6.0470e+00 3rd Qu.: 7.176
Max. : 50.000 Max. : 5.0000e+01 Max. : 45.350
NA's : 21287.000 NA's : 2.1429e+04 NA's : 22541.000
Time Parameters :
start end units deltat1
[1997 10 15 jd:288 000230.000] [1998 01 12 jd:012 235730.000] seconds 300.000
Looking at the absolute value of the median differences,
Atl - Fla = 2.2 deg
Cle - Fla = 3.4 deg
Bal - Fla = 4.0 deg
Atl - Cle = 1.2 deg
Alt - Bal = 1.8 deg
Cle - Bal = 0.6 deg
- 733: Sonic, Site all, Tue 04-May-1999 10:02:20 MDT, Height of Gill sonics
Many of the Gill sonic "height" measurements in the logbook are actually
the height of the sonic boom. According to logbook entry #659, the
center of the Gill sonic array is 60 cm above the center of the boom.
Kurt measured this distance in the laboratory and found it equal to 58 cm.
- 734: Visit_Log, Site 1, Fri 07-May-1999 11:28:34 MDT, Summary of site visits at stn 1
Logbook Date Site Comment highlight(s)
Entry (local)
31 oct 11 1 Setup 1.5 mile N of ship (Friehe R2 sonic sn 112?)
40 oct 15 all Sonic hts tabulated (345-348 cm to center of array)
38 oct 16 1 Reoriented Gill w/ `N' along boom
54 oct 20 1 New stn config
69 oct 23 1 Marked trail
75 oct 24 1 New stn config
97 oct 29 1 Changed TRH, compass reading shifted
115 nov 6 1 Routine maintenance
122 nov 13 1 Routine maintenance, new fan and heater
124 nov 18 1 Routine maintenance; heavy riming
135 dec 4 1 Routine maintenance
167 dec 23 1 Routine maintenance; heavy riming
187 jan 3 1 Routine maintenance
217 jan 15 1 Installed Fla sonic/TRH (R2A 0087)
242 feb 2 1 TRH moved from Fla to Atl; removed TEG burner
249 feb 8 1 Replaced TEG burner
274 feb 22 1 Routine maintenance
299 mar 5 1 Removed radiometers; light frost noted
308 mar 9 1 Installed modified rad array
328 mar 20 1 Replaced Gill w/ ATI from Fla
346 mar 31 1 Routine maintenance; leveled radiometers
365 apr 7 1 Installed PV panels
384 apr 11 1 Routine; hts and azimuths measured
386 apr 11 1,2,4 Sonic heights tabulated
389 apr 13 1 Installed refurbished? Cle TEG
402 apr 17 1 Moved sled; measured hts and azimuths
404 apr 18 1 Releveled tripod/radiometers; more hts and azimuths
414 apr 22 1 Installed wind generator, SW heaters;
422 apr 24 1 Replaced EVE with spare
documented exposure
434 apr 28 1 Routine maintenance
451 may 7 1 Routine maintenance
480 may 21 1,2,4 Rime check; minimal riming found
481 may 22 1 Measured hts and azimuths
487 may 26 1 Routine maintenance; measured azimuths
495 may 30 all Tabulation of site characteristics in late May
497 may 31 1 Routine maintenance
510 jun 5 1 Routine maintenance
519 jun 10 1 Routine maintenance
523 jun 11 1 Routine maintenance
526 jun 12 1 Measured heights, azimuth
531 jun 14 1 Routine maintenance
539 jun 18 1 Moved sled?
546 jun 22 1 Measured heights
556 jun 27 1 Leveled radiometers
562 jun 30 all Comparison of bubble & electronic levels
570 jul 6 1 Measured heights, azimuths
580 jul 14 1 Routine maintenance
592 jul 21 1 Leveled radiometers; measured heights and azimuths;
trimmed tape on sonic transducers
598 jul 24 1 Leveled radiometers
603 jul 28 1 Ablation mitigation
613 aug 4 all Tabulated offsets of electronic levels
614 aug 3 1 Routine maintenance; measured hts and azimuths
622 aug 8 1 Rebooted EVE
635 aug 15 1 Repositioned Tsoil; removed sonic (980202) for service
651 aug 24 1 Installed symmetric Gill sonic w/N 30 deg CCW to boom
654 aug 26 1 Rotated Gill N to align w/boom;
note that Fla Gill is asymmetric
659 aug 29 1 Routine maintenance; measured hts and azimuths;
added Gill boom extension
683 sep 12 1 Routine maintenance; measured compass bearing
693 sep 16 1 Leveled wind generator; measured compass bearing
708 sep 23 1 Routine maintenance
713 sep 28 all Summary of site characteristics
717 sep 30 1 Decommisioned Atlanta; measured hts and azimuths
720 oct 1 1,4 Comment on Tsoil, Gsoil sensors at Fla and Atl
Note that `Routine' Maintenance is often more than refueling, swapping
flash card, and de-riming sensors. However, here I am focusing mainly on
sensor maintenance.
- 735: Visit_Log, Site 2, Fri 07-May-1999 11:33:11 MDT, Summary of site visits at stn 2
Logbook Date Site Comment highlight(s)
Entry (local)
37 oct 14 2 Setup 2 mile S of ship (ETL R2A sonic sn?; TRH sn 4)
40 oct 15 all Sonic hts tabulated (345-348 cm to center of array)
52 oct 19 2 New stn config with revised compass scaling,
revised TRH polling
56 oct 20 2 Removed radiation sensors
59 oct 21 2 Replaced radiometers and CR10 data logger
84 oct 26 2 New stn config; replaced CR10
92 oct 28 2 Removed CR10!
93 oct 28 2 Stn 4 TRH modified and mounted at Stn 2
108 oct 31 2 Switched CR10, Pyg cables
112 nov 3 2 Unlogged visit to Stn 2?
116 nov 7 2 Routine maintenance
120 nov 11 2 Routine maintenance
124 nov 19 2 Installed 4-port radiometer fan; heavy riming
155 dec 18 2 Repaired bear damage; replaced TRH
173 dec 27 2 Installed 4-port radiometer fan from Fla;
Replaced EVE CPU board; heavy riming
191 jan 5 2 Routine maintenance; notes frost-free sensors
220 jan 17 2 Routine maintenance; light/moderate frost
258 feb 6 2 Cleveland 0, Ice 1
353 apr 3 2 Cle brought on-line adjacent to Fla
362 apr 6 2 Installed ATI #3; wind generator
370 apr 8 2 Checked and adjusted rad level
373 apr 10 2 Installed HFT and Tsoil sensors
385 apr 11 2 Attached GPS cable
386 apr 11 1,2,4 Sonic heights tabulated
392 apr 13 2 Removed ATI for installation at Bal
399 apr 16 2 Installed refurbished TEG from Bal
400 apr 16 2 Moved to Sea site; measured hts and azimuths
409 apr 19 2 Added heaters to SW radiometers
417-8 apr 22 2 Swapped Gill #123 for ATI #980303 (electronic id);
replaced outer dome of SW out
420 apr 24 2 Installed Schroff backplane
425 apr 25 2 Swapped EVE electronics
439 apr 30 2 Routine maintenance; replaced TEG chimney
452 may 8 2 Adjusted rad levels
467 may 17 2 Measured hts and azimuths; also see #470
475 may 19 2 Routine check
480 may 21 1,2,4 Rime check; minimal riming found
489 may 27 2 Cleaned radiometers; measured azimuths
492 may 29 2 Routine maintenance; measured azimuths
495 may 30 all Tabulation of site characteristics in late May
502 jun 2 2 Routine maintenance
512 jun 6 2 Routine maintenance
517 jun 8 2 Moved about 0.5 mile
520 jun 10 2 Moved to Maui
525 jun 12 2 Measured heights
535 jun 15 2 Leveled radiometers
548 jun 23 2 Leveled radiometers; measured heights
551 jun 25 2 Routine maintenance
555 jun 27 2 Leveled radiometers
562 jun 30 all Comparison of bubble & electronic levels
571 jul 6 2 Repositioned Tsoil sensor; leveled radiometers
573 jul 7 2 Measured heights and azimuths; wrapped Tsoil in Al foil
579 jul 14 2 Leveled radiometers
leveled radiometers
595 jul 23 2 Measured heights and azimuths; leveled radiometers
597 jul 24 2 Ablation mitigation
607 jul 30 2 Repositioned Gsoil; measured hts and azimuths
613 aug 4 all Tabulated offsets of electronic levels
618 aug 6 2 Positioned radiometers over meltpond;
repositioned Gsoil; measured hts and azimuths
620 aug 7 2 Leveled radiometers
625 aug 10 2 Leveled radiometers; repositioned Gsoil
632 aug 13 2 Tried to remove rad level sensors
641 aug 19 2 Repositioned (rescued) sled, radiometers
644 aug 22 2 Swapped level sensor; data back on line
655 aug 26 2 Leveled radiometers; removed Gsoil for repair;
measured hts and azimuths
661 aug 30 2 Swapped TRH (R4 910001); installed repaired Gsoil;
note that sonic level within 0.5 deg;
repaired TRH 006 but compass bad (log 662)
666 sep 2 2 Reinstalled "original" TRH; changed Tsoil coeff;
ice ridging under tripod
671 sep 6 2 Routine maintenance; radiometers leveled;
note that fan on upwelling pyrgeometer not working
680 sep 11 2 Reassembled TRH following bear visit; logbook 681
692 sep 16 2 Reconaissance visit; measured compass bearing
notes repositioning Tsoil at snow-ice interface
699 sep 20 2 Dismantled Maui following ice trauma
713 sep 28 all Summary of site characteristics
Note that `Routine' Maintenance is often more than refueling, swapping
flash card, and de-riming sensors. However, here I am focusing mainly on
sensor maintenance.
- 736: Visit_Log, Site 3, Fri 07-May-1999 11:35:24 MDT, Summary of site visits at stn 3
Logbook Date Site Comment highlight(s)
Entry (local)
33 oct 12 3 Setup 2 mile E of ship (NCAR R2A sonic sn 119?)
40 oct 15 all Sonic hts tabulated (345-348 cm to center of array)
39 oct 16 3 Reoriented Gill w/ `N' along boom
55 oct 20 3 New stn config
78 oct 25 3 No visit, TEG shut down
80 oct 25 3 Refueled, new config??
85 oct 26 3 Retrieved RAM disk
98 oct 29 3 Replaced TRH
120 nov 11 3 Routine maintenance, new fan and heater
140 dec 10 3 Refueled
170 dec 24 3 Swapped TRH with one removed from Cle
183 jan 1 3 Replaced modem and antenna; heavy riming
213 jan 13 3 Installed Fla sonic/TRH; replaced CR10 cable
264 feb 18 3 Routine maintenance
296 mar 4 3 Routine maintenance
324 mar 18 3 Routine maintenance
344 mar 30 3 Repaired bear damage; replaced hygrothermometer
395 apr 14 3 Replaced Gill #123 w/ ATI #302; measured hts
and azimuths; Installed TEG from Atl, 2 PV panels
415 apr 22 3 Installed wind generator, SW heaters;
measured hts and azimuths
443 may 1 3 Replaced EVE
446 may 2 3 Changed EVE config for ATI sonic
462 may 12 3 Replaced fuse; aerial site description
466 may 14 3 Ed eye-balled sonic level??
485 may 25 3 Installed spare TRH; measured sonic azimuth
491 may 29 3 Notes cleaning of radiometers
495 may 30 all Tabulation of site characteristics in late May
506 jun 4 3 Tightened RF cable
541 jun 18 3 Measured heights
544 jun 21 3 Notes drilling hole in ice
561 jun 30 3 Measured heights, azimuth; leveled rads
562 jun 30 all Comparison of bubble & electronic levels
574 jul 8 3 Repositioned "soil" sensors;
measured heights and azimuths
591 jul 20 3 Repositioned Tsnow, Gsnow; leveled radiometers;
raised tripod legs to level sonic arm
606 jul 30 3 Routine maintenance; measured hts and azimuths;
leveled radiometers
613 aug 4 all Tabulated offsets of electronic levels
626 aug 10 3 Leveled radiometers; measured hts and azimuths;
repositioned Tsoil and Gsoil
650 aug 24 3 Measured hts and azimuths
672 sep 6 3 Routine maintenance; radiometers leveled
676 sep 8 3 Check flashcard, RF transmitter, sonic heaters
684 sep 12 3 Routine maintenance; measured compass bearing
700 sep 20 3 Cleaned radiometers, sonics; changed antenna
703 sep 21 3 Dismantled Bal in anticipation of ice trauma
713 sep 28 all Summary of site characteristics
Note that `Routine' Maintenance is often more than refueling, swapping
flash card, and de-riming sensors. However, here I am focusing mainly on
sensor maintenance.
- 737: Visit_Log, Site 4, Fri 07-May-1999 11:36:52 MDT, Summary of site visits at stn 4
Logbook Date Site Comment highlight(s)
Entry (local)
40 oct 15 all Sonic hts tabulated (345-348 cm to center of array)
49 oct 18 4 Sonic 123 mounted (not at correct height);
fixed pyranometer wiring problems
60 oct 22 4 Removed radiometer fan to move to Stn 2
64 oct 22 4 New radiometer ventilator/heater
66 oct 23 4 Moved; Now operational; measured hts and azimuths
93 oct 28 4 Spare TRH modified and mounted at Stn 4
104 oct 30 4 TEG removed, cleaned, replaced
107 oct 31 4 TEG tuned
110 nov 1 4 Removed CR10, radiation to move to Stn 2
115 nov 6 4 Routine maintenance
123 nov 14 4 Replaced original sonic(?);
replaced cable and leveled radiometers
125 nov 22 4 Routine maintenance;
Also indicates daily de-riming of sensors
131 nov 30 4 Routine maintenance
139 dec 10 4 Replaced CR10 multiplexer;
fixed loose pyg.in cable
142 dec 13 4 Replaced 4-port radiometer fan with
4 individual `turbo' fans
148 dec 16 4 Routine maintenance; heavy riming
161 dec 20 4 Various tests and maintenance
168 dec 23 4 Routine maintenance
175 dec 29 4 Routine maintenance
180 dec 31 4 Installed TRH from Balt; removed rad fans
181 dec 31 4 Installed one-port fan w/ heater resisitors
188 jan 4 4 Routine maintenance
190 jan 5 4 Replaced hygrothermometer fan
195 jan 7 4 Installed sonic heaters, original TRH
205 jan 9 4 Installed 3 heater resistors on the shield of
each radiometer
209 jan 11 4 Routine maintenance
212 jan 13 4 Removed sonic/TRH; installed units from Bal
216 jan 15 4 Removed sonic/TRH
221 jan 17 4 Installed sonic/TRH from Atl
225 jan 20 4 Installed spare TRH
234 jan 27 4 Refueled
239 jan 31 4 Various servicing
243 feb 3 4 Installed repaired TRH
261 feb 15 4 Routine maintenance
270 feb 21 4 Removed radiometer array
277 feb 24 4 Installed modified rad array
280 feb 25 4 Spare TRH installed
283 feb 26 4 Installed ATI sonic
286 feb 27 4 Modified radiometer array
290 mar 1 4 Removed radiometer array
297 mar 4 4 Installed modified rad array
315 mar 13 4 Routine maintenance; heavy frost
329 mar 20 4 Installed Gill from Atl
331 mar 22 4 Lead under radiometers;
sfc measurements disrupted (see following entries)
348 apr 1 4 Moved Fla; reoriented Gill sonic wrt boom
371 apr 9 4 Turned on new heater on incoming SW
374 apr 10 4 Installed HFT and Tsoil sensors
376 apr 10 4 Installed heater on outgoing SW
377 apr 10 4 Moved wind generator from Cle to Fla
386 apr 11 1,2,4 Sonic heights tabulated
411 apr 20 4 Moved station 200m north
413 apr 21 4 Measured heights, angles, exposure
421 apr 24 4 Installed Schroff backplane
445 may 2 4 Changed EVE config for Gill sonic
448 may 3 4 Shot boom angles, not polar bear
456 may 6 4 Routine maintenance
452 may 8 4 Adjusted rad levels
461 may 12 4 Replaced TRH #005 w/ #007 to check spare
471 may 17 4 Routine maintenance
472 may 18 4 Measured hts and azimuths
480 may 21 1,2,4 Rime check; minimal riming found
495 may 30 all Tabulation of site characteristics in late May
498 jun 1 4 Routine maintenance; releveled radiometers
511 jun 5 4 Notes moving tripod??
516 jun 8 4 Measured heights
528 jun 13 4 Measured heights
534 jun 15 4 Plugged in "upper heater"
537 jun 16 4 Leveled radiometers; replaced fuse
543 jun 21 4 Downloaded new config
553 jun 26 4 Routine maintenance; attempted to level rads
562 jun 30 all Comparison of bubble & electronic levels
568 jul 4 4 Observations on snow heat flux, temp sensors
585 jul 18 4 Repositioned Tsnow
599 jul 26 4 Attempted to level rads; heights and azimuths
604 jul 29 4 Repositioned Tsoil and Gsoil;
leveled radiometers; measured hts and azimuths
610 aug 1 4 Leveled radiometers
612 aug 2 4 Leveled radiometers
613 aug 4 all Tabulated offsets of electronic levels
619 aug 7 4 Leveled radiometers; repositioned Tsoil and Gsoil
629 aug 11 4 Leveled radiometers; routine maintenance
652 aug 26 4 Routine maintenance; measured hts and azimuths
675 sep 8 4 Measured hts and azimuths; cleaned TRH
682 sep 12 4 Tested spare TRH briefly at Fla
696 sep 18 4 Trouble-shooting TRH; cleaned radiometers
701 sep 20 4 Worked on TRH again
705 sep 22 4 Routine maintenance
712 sep 27 4 Cleaned radiometers
713 sep 28 all Summary of site characteristics
718 sep 30 4 Decommisioned Florida; measured hts and azimuths
719 oct 1 4 Began TRH intercomparison
720 oct 1 4 Comment on Tsoil, Gsoil sensors at Fla and Atl
Note that not all visits to Fla were recorded in logbook and that not
all Fla visits in the logbook are listed here.
Note that `Routine' Maintenance is often more than refueling, swapping
flash card, and de-riming sensors. However, here I am focusing mainly on
sensor maintenance.
- 738: Sonic, Site all, Fri 07-May-1999 11:45:50 MDT, Heights of sonic anemometers
Sonic height measurements
Station 1 Station 2 Station 3 Station 4
Date ht(m) Date ht(m) Date ht(m) Date ht(m)
97 10 16 3.46 97 10 16 3.46 97 10 16 3.45 97 10 23 3.48
98 04 11 2.26 98 04 11 2.82 98 04 22 2.46 98 04 11 3.33
98 04 17 2.26 98 04 18 3.45 98 05 15 2.34 98 04 21 3.20
98 05 22 2.22 98 05 17 2.87 98 06 18 2.63 98 05 18 3.42
98 06 12 2.39 98 06 12 3.02 98 06 30 2.68 98 06 08 3.47
98 06 22 2.51 98 06 23 3.03 98 07 08 2.69 98 06 13 3.48
98 07 06 2.77 98 07 07 3.12 98 07 30 2.97 98 07 29 3.51
98 07 21 2.87 98 07 23 3.24 98 08 10 2.97 98 08 26 3.53
98 08 03 2.92 98 07 30 3.23 98 08 24 2.93 98 09 08 3.51
98 08 29 3.57 98 08 26 3.28 98 09 20 2.92 98 09 20 3.50
98 09 16 3.48 98 09 16 3.26 98 09 30 3.52
98 09 30 3.31
Added 0.58 m to heights of center of boom for Gill sonics
- 739: Hygrothermometer, Site all, Thu 22-Jul-1999 11:50:35 MDT, TRH intake heights
Following is a tabulation of the measured heights of the
hygrothermometer inlet. In a few cases, the height of the
hygrothermometer boom was measured and I subtracted 42-43 cm
to get the height of the intake.
The existing measurements could be supplemented with the more
frequent measurements of the height of the sonic boom. The
hygrothermometer inlet appears to be nominally 1 m below the
sonic boom. The variability in this difference is likely due
to the variability in the height of the surface below the two
booms.
Station 1 TRH intake Sonic boom
10/15/97 2.88m
4/11/98 2.26m
4/17/98 2.26m
5/21/98 1.27m 2.22m
6/12/98 1.43m 2.39m
6/22/98 1.61m 2.51m
7/6/98 2.77m
7/21/98 2.87m
8/3/98 2.92m
8/29/98 1.87m 2.97m
9/16/98 1.84m 2.90m
9/30/98 1.69m 2.73m
Station 2
10/15/97 2.88m
4/11/98 2.82m
4/16/98 2.87m
5/16/98 1.81m 2.87m
6/12/98 2.04m 3.02m
6/23/98 1.92m 3.03m
7/7/98 3.12m
7/23/98 3.24m
7/30/98 3.23m
8/26/98 2.18m 3.28m
9/16/98 2.30m 3.26m
Station 3
10/15/97 2.87m
4/22/98 2.46m
5/15/98 1.43m 2.34m
6/18/98 1.71m 2.63m
6/29/98 1.80m 2.68m
7/9/98 2.69m
7/30/98 2.97m
8/10/98 2.97m
8/24/98 1.94m 2.93m
9/20/98 1.90m 2.92m
Station 4
10/23/97 1.73m 2.90m
4/11/98 2.75m
4/20/98 2.62m
5/16/98 1.88m 2.84m
6/8/98 1.87m 2.89m
6/13/98 1.86m 2.90m
7/29/98 2.93m
8/26/98 1.87m 2.95m
9/8/98 1.87m 2.93m
9/20/98 1.96m 2.92m
9/30/98 1.82m 2.94m
Assumed that center of Gill array is 58cm above center of boom.
Logbook 659 states that the TRH intake was 43cm below the center
of the TRH boom.
Logbook 675 states that the TRH intake was 42cm below the center
of the TRH boom.
- 740: LOG, Site , Thu 13-Jan-2000 14:25:53 MST, Edited tklog.log file
I edited the base tklog file, tklog.log, prior to converting it to HTML.
This was done to:
1. Delete the extensive number of blank lines at the end of daily status
entries.
2. Remove blanks from the Type names. The Type names are used in file
names when outputing the results of the conversion to HTML and file
names with embedded blanks are messy.
Hopefully I didn't delete anything important in the process.
I saved the old tklog.log file as tklog.log.orig (but only after
I had begun to delete the blank lines).
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