August 2014 Barrow
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To Do:
- Change out snow transducers, 8 pieces
- swap back the B site net radiometer
- change out desiccant in the D site radiometer
- level radiometers
- Fix C site Rim Snow Sensor
- D Thermal Conductivity
- Program works fine in Fairbanks
- OKAY... Look at how it is wired in the field. / in pictures. I think there are two pulse port instructions when there should be just one.
To Bring:
- CNR4 Net Radiometers
- One for B (the original)
- retap the D screws and if I can't get that to work then move the altern
- ate radiometer from inventory (B) to D.
Plan:
Code: FDVIBG
Depart Thursday morning @ 7:40am
Return Friday night @ 12:21 AM
Contents
Thursday
- @ airport by 6ish
- grab coke in Fairbanks airport
- Arrive at NARL around 11am
- get keys and dress for day in field
- wind breaker
- backpack ready to go
- lunch for the day
- Water bottle, fill it
- actionpacker with:
- 8 snow sensors
- toolbag
- net radiometer for B
- drill for tapping D radiometer if needed
- 6/32 screw for D
- also bringing a 4/32 screw & tap for backup.
- serial cable
At each site
- level radiometer
- level precip bucket
- look at leveling tower / anemomemters
- listen to anemometers for bearing problems
- swap out desiccant in the box
- might double-check serial numbers if there is time
- more pictures
Additionally
- At B swap back in original radiometer
- At C fix the Rim snow sensor
- At D change out the desiccant in the radiometer
Tools used
- Desiccant swap:
- None
- Net Radiometer
- phillips screw driver
- anti-oxidizing goo
- Precip bucket
- 5/16" nut driver on hose clamp and self-tapping screw on the bucket lid
- torpedo level
- snow sensors
- Phillips screw driver (had on hand 3)
- channel locks
- 1/4" nut driver
- flat screw driver
- 1/2" nut driver
- red electrical tape
- Also had on hand:
- serial cable
- laptop
- voltmeter
- cr1000 keypad
- csi flat screw driver
- small 1.5m tape
- tap & die set (for net radiometer, not used this trip)
- multitool
- duct seal
- cable ties
Backpack contents=
- 8 snow sensors
- tool bag with tools above
- first aid kit
- rain coat
- ultrapod
- gopro & extra battery
- waterproof pack cover
- toughbook
- extra serial cable
- snug hat
- mouth balaclava
- gopro chest mount
- this check list page
- water bottle
- five bar snacks
- Extra desiccant (shoot for replacing at least annually and 2-4 packs per trip)
- bike stereo & stereo cable plus ipod in waterproof bag
- 2 pairs of liner gloves
- gray fleece
- green long underwear top
- black windproof vest
Wrap up notes
- Precip stands seem to be levelest at A & C so might be best to use them.
- most net radiometers were close to level.
- Look into buying more tap & die drill bits & the alternate type that dead end flat like Bill mentioned.
- see about buying more of the SR50A screws that secure the disposable transducer to the main body.
- The C site Net radiometer will need to be tap & drilled on the next trip. I greased all but one screw on this trip but it was stripped on the head.
- should grease all hardware (the main ones like SR50A, net radiometer etc) annually.
- with things stable, should retrieve current programs and make sure git archive is up to date.
Program note
Just a quickie. From CR signature checker: Program Signatures Values, match with the 7th field in the first line of the .dat file
60958 GRID_SITE.CR1 27520 ngee_intensive_site_A.CR1 26235 ngee_intensive_site_B.CR1 47521 ngee_intensive_site_C.CR1 6216 ngee_intensive_site_D.CR1 majestic:barrow bob$ A matches the logger (as viewed in logger net -> status table B matches the logger (as viewed in logger net -> status table C matches the logger (as viewed in logger net -> status table D matches the logger (as viewed in logger net -> status table ... D doesn't match the data file though and I guess that is where I got hung up. The data file didn't increment along with the change of the program signature for the D site.
Post Trip Notes from Fieldbook
@ A
- A trough snow mount to corroded to remove so replaced transducer in-place
- Level Net Radiometer (It was close)
- Level Precip (Also close to level)
- Added anti-corrosion goo to net radiometer screws & connections
- Changed desiccant in the box
- Tools Used for Precip bucket leveling:
- 5/16" Nut Driver
- Torpedo Level
- Tools Used for Snow transducer maintenance:
- 1/2" Nut Driver
- Flathead Screwdriver / 1/4" Nut Driver
- channel locks
- phillips screw driver
- In-memory reset of snow depth offset
- SR50A1 = 182.1
- SR50A2 = 126.75
@ B
- Level Net Radiometer
- Swap back original net radiometer
- add anti-corrosion goo to radiometer & lower anemometer
- level precip (it was quite a ways off)
- change snow transducers
- Changed desiccant in the box
- In-memory reset of snow depth offset
- SR50A1 = 177.5
- SR50A2 = Unchanged from program
@ C
- C Trough snow mount to corroded to remove from the mount so transducer replaced on existing sensor
- Precip still level
- Net Radiation Leveled
- 1 screw is stripped on the C net radiometer so I will need to bring the tap & die up on the next trip to fix that.
- Changed desiccant in the box
- Anti-corrosion goo added to net radiometer and lower anemometer
- In-memory reset of snow depth offset
- SR50A1 = Unchaged from program
- SR50A2 = 115.0
- SR50A3 = 117.3
@ D
- Changed net rad desiccant & leveled
- swapped snow transducer, deployed S/N 2901
- Think I figured out the thermal conductivity problem.
- In-memory reset of snow depth offset
- SR50A1 = 159.7
Additionally:
- I think A & C precip are probably the highest quality (most stable stands).
- C net radiation will need a fix for the stripped out screw next visit
- Averaged 30 minutes per site.
- Ended up not having wheelbarrow access but we had no problem carrying things out.