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Commissioning and Science Verification

Radio pointing offsets for single-beam receivers > Measurement†

Revision history

• 2016-09-01 - Kamazaki,T. - created

Table of contents

• Radio pointing offsets for single-beam receivers > Measurement
  • Preparations
    • Adjust initial pointing using either of the following observation tables
    • Check OPT images and start iOPT
  • Measurement

Preparations†

• antstat is unnecessary any more
  • iOPT_r17shm communicates with COSMOS3 through shared memories and NOT files created by antstat.

1. Login to COSMOS3 manager GUI with Group=asteXX (e.g. aste16) and Project=sbrfXX (e.g. sbrf16)
2. Tune the receiver to be used
3. Check Aspirin is in the WIND ON mode
   • Aspirin status can be confirmed by looking at the Aspirin Monitor window. Check the following three items.

     Current time = 2016/09/02 08:22:15    <--- The differences among these three times
     Aspirin time = 2016/09/02 08:22:14    <--- should be less than 60 seconds.
     Weather time = 2016/09/02 08:22:08    <---
     Aspirin Offset : (Az, El) = (   6.64,   0.42 )
     Aspirin status : ** WIND ON ** ( C22:on  C6:OFF WIND:on )    <--- should be "WIND_ON"
     Refraction Corr. status : OK                                 <--- should be "OK"

4. Launch CONT qlook (qlookc) from cos3launcher
   • Make sure auto-pointing is disabled
   • Push the START button

Adjust initial pointing using either of the following observation tables†

Check OPT images and start iOPT†

1. Check an OPT image
   • Initialize the OPT following the instructions in
   • Initialize the OPT and take an OPT image following the instructions in CSV/Optical pointing/Optical telescope setup/Focus adjustment
     • Normally, it would be unnecessary to adjust its focus
2. Start iOPT on aste-c1c
   • iOPT calculates pointing offsets from optical images and records their results to files.

• Login to aste-c1c

  > ssh astecntl@aste-c1c

• Confirm that no iOPT is running on aste-c1c

  astecntl@aste-cabin1c: ps -ef | grep iOPT | grep -v grep
  If nothing is displayed, go to the next step. If iOPT_r17shm exists, kill it.
  astecntl  4846  4806 38 23:57:49 pts/0    8:38 /cosmos3/naoj/sbinSol/iOPT_r17shm
  astecntl@aste-cabin1c: kill 4846

• Run iOPT in the directory of ~astecntl/optpon

  astecntl@aste-cabin1c: cd ~/optpon
  astecntl@aste-cabin1c: pwd
  /home/astecntl/optpon
  astecntl@aste-cabin1c: /cosmos3/naoj/sbinSol/iOPT_r17shm

• Confirm "Antenna not ready" messages

  天体に向くと毎秒10-15の測定値が流れる。
  optonのdirectoryにyyyymmddhhmm.tabというlogging fileが生成される。
  強制終了(CNTL&C)されるまで走っている。COSMOSで指示書を変えても同じlogging fileにデータが取得されるため、別のlogging fileにしたい場合は、一度強制終了して再度起動させる。

Measurement†

• Check list
  • Check Aspirin is in the WIND ON mode

1. Run either of the following observation lists in the batch mode of the COSMOS3 manager GUI
    

   Saturn	DASH345	istd3.list
   	BAND8	istb8.list