SHEBA: Site 4 Messages, 132 Entries..

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.

  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.

  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.

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.

  The 4-comp ventilation fan was removed so it could
be placed out at station 2. This took place at about
21:00 gmt.

  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

  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)

  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.

  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.

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.

0300 AKST Florida TEG voltage started dropping steadily to 0V.
TEG/EVE box temperature dropped steadily over 3 hours to 0C.

  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.
 

  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.

  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.

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.

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.

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.

12/19 ~1900gmt
	Cycled power to electronics box at Florida after experimenting with 
eve "start" command from ship caused it to hang.

12/19 ~2300gmt
	Attempted to find problem with Florida's high reported currents and 
slowly dropping voltages.  Did not find problem.

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.

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

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.

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.

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.

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.

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.

1/5 19:00gmt
	Replaced fan in TRH at Florida.  (This is originally Baltimore's TRH, 
and was installed at Florida for testing.)

  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).

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.

  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.

  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.

  The 4-comp system was brought to the ship to modify it
with the heaters mounted on the radiation shield.

  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.

  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.

  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.

  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.

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.

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.

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.

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.

1/15 ~18:30
	Removed sonic and TRH from Florida to install at Atlanta.

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

Changed  one FLA propane tank.

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.

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.

2/9 ~23:15gmt
	Turned Florida's sonic heating cycle back on.  Heaton=600, Heatoff=6600.

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.

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

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.

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

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.

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.

2/26 16:47gmt
	Changed heaton=5, heatoff=3600 in Florida's TRH for sonic heater 
control.

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.

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.

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... 

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,

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.

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.

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.

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

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.                

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

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. 

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

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

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

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

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

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

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

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.

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. 

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

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.

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.

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.

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.

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.

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.

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.

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.

4/10, 9:30 AKDT
	Turned on Minco heater installed on case of
	the downlooking SW K&Z.

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.

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.

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)

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.

	

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.

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=

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.

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.

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. 

~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.

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.  

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. 

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.)

Time about 2230 11 May GMT
Peter replaced T/RH assembly #005 with #007.
No problems before, just checking spare.  Worked OK.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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 .... ?

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

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?

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.

Site visit Florida -- July 19, 1998

	Repositioned Teg box, and stabilized it with blocking and stakes.

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

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

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.

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.

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.

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 

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

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

	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.

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.

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?? 

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

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

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.