August 2014 Barrow

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

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.