J14K (REMOVED)

Station Notes

Station Close-Out Report
None at this time

Service Plan

Site Access

Helicopter.
Located within Yukon Delta National Wildlife Refuge

Site Contact

None at this time

Site Visits

2021_05_15 Removal (R. Bierma, K. Schroeder)
USArray Station Removal Report Form V1.5
STATION CODE: TA.J14K
STATION LOCALE DESCRIPTION: Nanvaranak Lake, AK
STATION REMOVAL LOG DATE (UTC): 5/15/21
STATION/SENSOR DOWN TIME (UTC): 18:35
REMOVAL DESCRIPTION: Sensor removed. Casing cut off below grade and capped. Hut removed.
ACTIONS TAKEN: The station was powered down after collecting a final screenshot. Sensor issued "remove" command, log file captured (attached). Sensor orientation measured with Octans on top plate. Sensor pulled free by hand. After the instrument and bags were removed, the metal casing was cut off 6” below grade using the die grinder. The hut, conduit and all remaining materials were slung back to Bethel.
CASING CONDITIONS: The casing was in good condition with no damage to the wellcap or conduit. No evidence of frost jacking and no water present in the casing.
SEISMOMETER REMOVAL: 1/3 difficulty. One person with easy-moderate pull.

LAT/LONG OF SENSOR HOLE: N 62.74916, W -163.55402, WAAS enabled
Distance and azimuth to Hut from Sensor hole: 179", 164 degrees
Wind turbine: [not present]

Bottom of wellcap to grade level: 6.5”

SENSOR ORIENTATION MEASUREMENTS:
Measured with OCTANS Unit: 1.40 degrees (OCTANS s/n 34531211, b/c 5008931)
Orientation at install: 0.02 degrees using OCTANS

COMMENTS:
Soil temperature sensor was removed. Data loggers labeled and collected for later download.
Vaisala still had active connection to EP

All take offs and landings were logged for the FWS NWR reporting.

REMOVED:

Q330 TagId – 1539; bc – 5002046
Baler 44 sn – 15655; bc – 5008167
STS5A sn – 130774; bc – 5015452
VIE bc – 5017174
QEP sn – 119593; bc – 5011138
infra SETRA sn – 4620583; bc – 5011200
infra NCPA sn - H111040326; bc – 5011617
Regulator Board sn – 558; bc – 5018155
BGAN Modem sn – 353938030195204; bc – 5018289
BGAN SIM sn – 898709916412350482
XI202 sn – 722; bc – 5018244
WXT520 sn – M4650228; bc – 5018170
Power sys 1.6.4
Charge Controller bc – 5017815
LiFePO4 sn – 5321; bc – 5017302
LiFePO4 sn – 5348; bc – 5017318
LiFePO4 sn – 5352; bc – 5017322
LiFePO4 sn – 5387; bc – 5017347
LiFePO4 sn – 5400; bc – 5017358
LiFePO4 sn – 5402; bc – 5017360

DAMAGE: None

LEFT AT SITE: cutoff casing

VISITORS:
1. Bierma
2. Schroeder (Recon)
3. Elsass (Alpine)
4. Bue (Alpine)
2020_07_15 Service (R. Beirma, J. Miner)
USArray Station Service Report
Form V1.0

STATION CODE:
TA.J14K

STATION Locale Description:
Nanvaranak Lake, AK

STATION SERVICE LOG DATE:
20200715

STATION/SENSOR DOWN TIME (UTC):
Station BGAN comms were sporadic from mid April to mid June, the offline fully since mid June, 2020.
Station powered down for about 5 minutes ~1825 UTC

SERVICE DESCRIPTION:
Revive station BGAN comms with cable swap and terminal APN change

UPON ARRIVAL:
Station in good condition. Conduit pulled off LB on hut side, no damage to sensor cable.
BGAN stuck on C2C APN with Regional Beam. When connected on Narrow Beam, signal strength only 60-61.

ACTIONS TAKEN:
BGAN terminal APN settings updated to new "ds1" APN for Galaxy 1 changeover.
BGAN antenna cable swapped. Improved signal strength on Narrow Beam to 67-68.
There was an issue where the connection dropped from Narrow to Regional after about a minute. However, after a SIM unseat/reseat, the terminal began to act normally and stuck on the Narrow Beam. We considered a terminal swap, but the return to normal for 15 minutes and lack of other red flags convinced us to leave it.
Baler media swap.
Soil temperature sensor cables were chomped off, so data loggers removed permanently. Data to be uploaded in Anchorage.

EQUIPMENT REMOVED:
n/a
EQUIPMENT INSTALLED:
n/a

COMMENTS:

Door taped prior to departure.

VISITOR:
1. Bierma
2. Miner
3. Bue (Alpine Air)
ON NEXT VISIT:
n/a
CHANGES AFFECT INSTRUMENT RESPONSE:
n/a
2017_05_30 Install (R. Bierma, M. Sanders, J. Theis)