Commissioning and Science Verification

Optical pointing > Optical telescope setup

What's this page?
This page describes the way to setup the optical telescope for optical pointing measurements.
Revision history
  • 2006 - K. Nakanishi - prepared ASTE_OPT_FOCUS.pdf
  • 2010-04-02 - N. UKITA - modified.
  • 2010-09-03 - B. Hatsukade - created Pukiwiki pages from the PDF.
  • 2013-08-05 - N. UKITA - modified.
  • 2014-04-21 - BH and YW - updated.
  • 2016-08-01 - Kamazaki,T. - modified for Linux COSMOS3.
Table of contents

Optical telescope setup

Focus adjustment

Display an optical image to check focusing

  1. Login to COSMOS3 manager GUI with Group=asteXX (e.g. aste16) and Project=opttrk
  2. Start an obstable, which will just track a star continuously, in the project
  3. Login to the Mitaka analysis computer (e.g. aste-ms1) with asteXX (e.g. aste16)
    % ssh -Y asteXX@aste-ms1
    • Don't forget to add '-Y' option to forward windows.
  4. Initialize the video capture board (at the start of measurements once a day)
    asteXX@aste-ms1: ssh astecntl@aste-c1c /cosmos3/naoj/sbinSol/optinit
    device:    [ ok ]
    mmap:      [ ok ]
    init bcr:  [ ok ]
    init:      [ ok ]
    initLUT:   [ ok ]
    clear FB:  [ ok ]
    AVME-338B -> successfully initialized    <--- confirm this message
  5. Display (a part of) an optical image
    asteXX@aste-ms1: ~/analysis/bin/optshot.sh r  1  128
                                            (1)(2)(3)
    (1) Frame color to be dumped (normally, 'r'=Red is used)
    (2) Number of frames to be taken (set '-1' for infinite loop)
    (3) Image size [pixel] (set '448' for a full-size image)
    This will display an image whose center is (256, 256) pixels and size is 32 pixels.

    #ref(): File not found: "opt_optpon.png" at page "CSV/OpticalPointingOPTSetup"

    • A star would be close to the image center, if antenna pointing is appropriately adjusted.
    • Pixel scale is 1.27 [arcsec/pixel].

Adjust focus position

  1. Run a observation table just tracking a star
    group: asteXX
    project: opttrk
    observation table: Select a table close to the current LST
    e.g.) t132-36B.start for LST13h
           (1)(2)(3)
    (1) R.A.
    (2) Dec.
    (3) Brightness (A>B>C>D)
        夜間Aの星はサチる可能性がある
  2. Login to aste-c1c with astecntl
    > ssh astecntl@aste-c1c
  3. Connect the stage controller
    astecntl@aste-c1c: tip serial2
    connected    <--- confirm this message for successful connection
  4. Move the focus stage so as to achieve sharp image in OPT
    • There is no command prompt
    • Each command has to be followed by twice inputs of RETURN
    • Input ~. to disconnect.
    • Print status
      Q:1  
      1, +12345, ACK1, ACK2, ACK3
      +12345: current position
      ACK1 X: command error / K: command success
      ACK2 K: stop successfully / P: stop due to '+' limit / M: stop due to '-' limit
      ACK3 B: busy / R: ready
    • Move to the origin
      H:1             ←原点設定(レンズ側の端を原点とする)
      G               ←移動開始(10秒くらい待つ)
      Q:1             ←ステイタス確認
      1,         0,K,K,R       と表示されれば正常終了
    • Move (※画像が更新されるまでに時間がかかるので注意)
      M:1+P20100      ←20100パルス分移動準備
      G               ←移動開始
      Q:1             ←ステイタス確認
      1,         +20100,K,K,R  と表示されれば設定正常終了
      ピントが大きくズレていると判断されたときには、数百パルス程度ステージを前後に動かしてみる。
      M:1+P500        ←+500パルス移動
      G               ←移動開始
      Q:1             ←ステータス確認
      L:1             ←ステージを緊急停止させる

History of focus positions

2003-0413700(参考値)外気温0+-5°Cでの最適値(赤フィルターなし)
2009-0720100近辺Observing Log/2009-07-29
2010-0421100Observing Log/2010-04-12
2010-090Observing Log/2010-09-09
2011-04-500Observing Log/2011-04-14
2012-0620700Observing Log/2012-06-15
2014-0420500Observing Log/2014-04-21

Troubleshooting

コマンド入力の際、ステータスを読んでからパルス値を入力する前にリターンを2回押していない可能性がある。


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