SHEBA: Visit_Log Messages: 185 Entries..

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

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

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.

  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.

  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.

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.

12/17 ~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.

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.

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.

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.

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.

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

12/24 ~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.)

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.

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.

12/31 ~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.

1/1 ~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.

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.

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 ~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.

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.

1/13 ~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.

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

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

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.

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.

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.

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.

2/8 ~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.

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.

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.

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.

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

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,

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.

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'.

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).

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.

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

3/18 ~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

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

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

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

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.

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.

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.

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.

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.

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.

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.

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.

	

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

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

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.

4/21 ~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

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....

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 

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. 

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.

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.

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. 

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 %

~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.

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.
 

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.  

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.

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.

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.

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.

I changed the propane and TEG nozzle at Sea.  Everything else there looked good.

Dave

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

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.

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.

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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)

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

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

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

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

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

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

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

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

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

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

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)

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

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

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

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

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?

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.

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.

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

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.

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.  

Site visit Alanta

	Fixed problem with flash card.  All else is well.

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 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.

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).

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.

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.

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.

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 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.

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

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.

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

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.

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

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.

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 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.

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.

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

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

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 

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 

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

	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.

	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.

	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.

	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.

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.

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.

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.

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.

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

		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

	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.

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.

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)

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.

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.

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.

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.