F18K (AEC-AON)

Station Notes

• ADOPTED BY THE AEC

• The cell signal strength is poor (-92 dBm) and the modem was having a hard time keeping up with the Q330’s DP1 buffer. The site’s communications performance should be carefully watched over the next few days in case the cell modem’s data rate is insufficient.

Service Plan

Site Access

• Helicopter

Site Contact

• None at this time
  

Site Visit

•  2021_05_30 Service (R. Bierma, T. Juskalian)

  USArray Station Service Report
  Form V1.0
  
  STATION CODE:
  AK.F18K
  
  STATION Locale Description:
  Selawik, Alaska
  
  STATION SERVICE LOG DATE (UTC):
  20210530
  
  STATION/SENSOR DOWN TIME (UTC):

  1954-1959

  
  SERVICE DESCRIPTION:

  Baler media swap

  
  

  UPON ARRIVAL:  

  Station was in good condition. No animal damage was observed aside from chewed door tape.

  
  

  ACTIONS TAKEN: 

  Baler media swap

  EQUIPMENT REMOVED:

  n/a
  
  EQUIPMENT INSTALLED:
  
  n/a

  
  

  COMMENTS:

  
  

  Door taped prior to departure

  There has likely been some minor frost jacking on the PVC casing over the lifespan of the borehole. The original report indicated 6" height, a fair estimate of the current height is 10".

  
  

  VISITOR: 

  R. Bierma

  T. Juskalian

  T. Potgieter

  
  

  ON NEXT VISIT:

  n/a

  CHANGES AFFECT INSTRUMENT RESPONSE:

  None

•  2020_10_20 Removal (Adopted by AEC)

  USArray Station Removal Report 

  Form V1.5

   

  STATION CODE: TA.F18K

   

  STATION LOCALE DESCRIPTION: Selawik, AK, USA

   

  STATION REMOVAL LOG DATE: 20201020

   

  STATION/SENSOR DOWN TIME (UTC): N/A

  REMOVAL DESCRIPTION: Site was adopted by AEC and has not been removed.

  ACTIONS TAKEN: Site was not visited during the adoption process. 

  LAT/LONG OF SENSOR HOLE: N/A

   

  Top of Casing to hole bottom (indicate if sand present or evacuated): N/A

   Bottom of wellcap to grade level: N/A

  SENSOR ORIENTATION MEASUREMENTS: 

  Measured with Octans Unit: N/A

  Measured with rods on pin: N/A

  Casing/wellcap marked with reference orientation: N/A

  SENSOR ORIENTATION: N/A

  COMMENTS: 

  GCI cell modem site, remote acquisition changeover to AK network.

  REMOVED: N/A

  DAMAGE: N/A

  LEFT AT SITE: N/A

  VISITORS:

  Nate Murphy

  NEXT VISIT:  N/A

  SITE STATUS:  N/A

  HOLE STATUS: N/A
•  2019_11_05 Service (R. Bierma, J. Soderquist)

  STATION CODE:
  TA.F18K
  
  STATION Locale Description:
  Selawik, AK
  
  STATION SERVICE LOG DATE:
  20191105
  
  STATION/SENSOR DOWN TIME (UTC):
  
  SERVICE DESCRIPTION:

  swap cell modem and antenna

  
  UPON ARRIVAL:  

  Station was in good condition. Some frost on the solar panels.

  
  

  ACTIONS TAKEN: 

  Sierra Wireless Airlink RV50 cell modem swapped in for the RavenX

  Same GCI SIM card used (IP 10.242.250.28)

  Laird tall whiskey cup antenna swapped in for short whiskey cup. Connection retaped.

  
  

  EQUIPMENT REMOVED:

  RavenX cell modem: bc 5006896, sn 0734307712
  
  EQUIPMENT INSTALLED:

  Sierra Wireless: bc 5018784, sn LT74550050011031

  IMEI: 353968090716375

   Has standard TA GCI template with iris.gci apn

  
  

  COMMENTS:
  
  It was about 10F, so we didn't want to get too in depth on station cabling and other tasks for risk of breaking things.

  Doug confirmed operation remotely prior to our departure.

  
  
  VISITOR:
  Ryan Bierma

  John Soderquist

  Turner Pahl (Alpine Air)

  
  ON NEXT VISIT:

  n/a

  CHANGES AFFECT INSTRUMENT RESPONSE:

  n/a

•  2019_08_23 Service (J. Miner, R. Bierma)

  USArray Station Service Report
  Form V1.0

  STATION CODE:
  TA.F18K

  STATION Locale Description:
  Selawik, Alaska

  STATION SERVICE LOG DATE:
  20190823

  STATION/SENSOR DOWN TIME (UTC):

  1845-1945 UTC

  
  SERVICE DESCRIPTION:

  Sensor cable repair

  Vaisala station swap

  Other firmware updates and station checks

  
  UPON ARRIVAL:

  The station was in good shape overall. The only noted problemw as that the conduit was diconnected at the wellcap and chewed by a bear.

  
  ACTIONS TAKEN:

  A new STS-5A sensor cable was installed in place of the bear chewed cable. The conduit was reattached to the wellcap box. The sensor appeared to be functioning, based on good mass leveling and stomp tests.

  A Vaisala WXT536 was installed in place of the failed WXT520. The cable was fine.

  The Genasun charge controller was upgraded to firmware 1.20

  QEP firmware was updated to 1.10

  XI202 firmware was updated to 4286

  Baler media was swapped.

  No soil data was downloaded.

  
  EQUIPMENT REMOVED:

  Vaisala WXT520: sn H1210003, bc 5013029

  
  EQUIPMENT INSTALLED:

  Vaisala WXT536: sn R2210116, bc 5019065

  
  

  COMMENTS:

  The sensor was bedded with 1.75L of sand - less than normal since it's an STS5A in PVC (a tighter fit).

  OCTANS was used to orient sensor: 0.0 degrees

  Door was taped prior to departure

  
  

  VISITOR:
  Jeremy Miner
  Ryan Bierma
  Turner Pahl (Alpine Air)

  
  ON NEXT VISIT:
  There was supposed to be a cell modem upgrade on this trip, but unfortunately due to a mixup we did not bring the RV50 along. The RavenX is still working fine, but the signal was not good (-106 dB).

  
  CHANGES AFFECT INSTRUMENT RESPONSE:

  yes

• 2017_07_27 Install (J. Miner, K. Aderhold, D. Bloomquist)
• 

Station Health

PDFs

ANF Station Page

MesoWest

66.60014, -159.65137, Elev: 89ft