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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
  • Measurement

Preparations†

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
   • Turn on auto-pointing.
   • Push the START button.

Measurement†

• Check list
  • Aspirin is running in the WIND ON mode.
  • Auto-pointing is enabled on the CONT qlook.

1. Adjust pointing using either of the following observation tables
    

   Saturn	DASH345	stx5d3.start
   	BAND8	stx5b8.start

    
2. 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
    

   Saturn	DASH345	stsbd3.list
   	BAND8	stsbb8.list

    
   • 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

   • Data are reduced by a unit of the loop. Stop running observations after the last observation table "a", if necessary.