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Commissioning and Science Verification

Subref position offsets for single-beam receivers > Measurement†

Revision history

• 2016-08-01 - Kamazaki,T. - created

Table of contents

• Subref position offsets for single-beam receivers > Measurement
  • Preparations
    • 1. Start COSMOS3 and tune the receiver to be used
    • 2. Check Aspirin is in the WIND ON mode
    • 3. Launch CONT qlook
  • Measurement
    • Check list
    • 1. Adjust pointing
    • 2. Adjust focus
    • 3. Run either of the following observation lists in the batch mode of the COSMOS3 manager GUI

Preparations†

1. Start COSMOS3 and tune the receiver to be used†

• Login to COSMOS3 manager GUI with Group=asteXX (e.g. aste16) and Project=sbrfXX (e.g. sbrf16)

2. Check Aspirin is in the WIND ON mode†

• Aspirin's running can be confirmed by looking at the Aspirin Monitor window. Check the following three items.

  Current time = 2015/04/06 01:22:06    <--- The differences among these three times
  Aspirin time = 2015/04/06 01:22:04    <--- should be less than 60 seconds.
  Weather time = 2015/04/06 01:22:01    <---
  Aspirin Offset : (Az, El) = (   8.65,   4.62 )
  Aspirin status : OK ( C22:on  C6:OFF WIND:OFF)    <--- should be "WIND_ON"
  Refraction Corr. status : OK                      <--- should be "OK"

3. Launch CONT qlook†

• Run CONT qlook (qlookc) from cos3launcher and turn on auto-pointing on the qlook

Measurement†

Check list†

• Aspirin is running with the WIND ON mode

1. Adjust pointing†

• Adjust pointing using either of the following observation tables

  Saturn	DASH345	stx5d3.start
  	BAND8	stx5b8.start

2. Adjust focus†

• Measure z-position of the sub-reflector by running either of the following observation tables
   

  Saturn	DASH345	stsbd3z.start
  	BAND8	stsbb8z.start

   
• if |dz| > 0.1 mm, add its resultant offset to dz

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

• A loop consists of 12 observation tables

  Step 1. repeat [z->a->b->c->d->e->a->f->g->h->i->a]
  
  z|
  -+
      e       A
      d       |X (dx=1.0 mm)
  g f a h i  <-Y (dy=1.0 mm)
      b
      c

• Since data are reduced by a unit of the loop, stop running observations after the last observation table "a" if necessary