History of Observation and Analysis/SubRef (No. 7)

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  • 2 (2011-03-23 (Wed) 09:16:39)
  • 3 (2011-03-24 (Thu) 07:52:17)
  • 4 (2011-03-25 (Fri) 17:32:46)
  • 5 (2011-03-26 (Sat) 14:14:53)
  • 6 (2011-04-04 (Mon) 10:10:02)
  • 7 (2011-04-09 (Sat) 15:13:14)
  • 8 (2011-04-10 (Sun) 19:58:30)
  • 9 (2011-04-12 (Tue) 11:18:24)
  • 10 (2011-04-18 (Mon) 02:05:57)
  • 11 (2011-04-18 (Mon) 07:37:04)
  • 12 (2011-04-25 (Mon) 04:24:27)
  • 13 (2011-04-25 (Mon) 14:26:29)
  • 14 (2011-04-28 (Thu) 07:28:00)
  • 15 (2011-04-29 (Fri) 05:42:38)
  • 16 (2012-06-13 (Wed) 17:52:39)
  • 17 (2012-06-18 (Mon) 08:14:02)

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What's this page?

This page is provided for the ASTE commissioning team to share the information on "subreflector measurements", which involves optimization of focusing and instrument pointing. Feel free to edit the page and then leave your revision history.

Revision history

• 23-Mar-11 - YT - modified for the 2011/Apr. runs. ! STILL EDITING !
• 26-Apr-10 - BH - added predicted temperatures of planets in April-May 2010.
• 16-Apr-10 - YT - modified for runs during April-May, 2010.
• 15-Aug-09 - YT - modified for further runs in early September, 2009
• 18-Jun-09 - YT - modified.
• 18-Jun-09 - SH - created.

Contents

• Observation and reduction manuals
• Latest commissioning plan (as of subref)
  • Reference sources
  • Schedule and staffing plan
• Subref measurement overview
  • はじめに - 背景と獲得目標
  • 測定の概要
    • 簡単にフォーカスを合わせる
    • 副鏡位置X,Y,ZのEL依存性の測定
    • 連続波ポインティング/ビームマッピングによる器差追い込み
    • 外気温変化時の副鏡位置変化の測定 (advanced)
    • 最適なtilt位置の測定 (advanced)
• comment

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Observation and reduction manuals†

• Observing manuals
  • Focus measurement
  • Pointing measurement (cont)
  • Pointing measurement (line)
• Reduction manuals
  • Focus measurement
  • Pointing measurement (cont)
  • Pointing measurement (line)
• Misc pages
  • Observation and Analysis/SubRef/BeammapPhotoBook
  • Observation and Analysis/SubRef/Document
  • Observation and Analysis/SubRef/PageForChief
  • 副鏡奮闘記2009

• Obsolete pages
  • 2009年副鏡測定手順書（過去の情報）
  • 2010年副鏡測定データ解析（過去の情報）
  • 副鏡測定データ解析マニュアル（過去の情報）

Latest commissioning plan (as of subref)†

• This plan is for the run in April 2011.
• the commissioning plan is available.

Reference sources†

• Target: Saturn

• expected antenna temperature of the target(s)
  • main-beam filling factor: bff = 1-exp[ - ln(2)*[ D(obj)/θ(HPBW) ]^2 ],
    • D(obj): apparent diameter of a planet, θ(HPBW): beam FWHM (D and θ should be measured in the same units.)
    • assuming the main beam is approximated with a Gaussian function.

• 2011/04/10 (ASTE 22" beam, ηmb = 0.6, ephemeris from JPL Horizons)
  • Satrun: apparent diameter = 18.36", Ta* = 32.2 K (=bff*140K, bff=0.383)

    $ python
    >>> from math import *
    >>> bff = 1-exp( -log(2) * (18.36/22.)**2  )
    >>> Tb = 140.
    >>> eta = .6
    >>> Tas = eta*bff*Tb
    >>> Tas
    32.165120380

#ref(): File not found: "azelp_110415UTC.png" at page "Observation and Analysis/SubRef"

• Figure: AZ-EL plot. The horizontal axis represent time (UTC). Note JST=UTC+9. If you want to convert Chilean time (AST) to JST, add 13h to AST (i.e. JST=AST+13).

Schedule and staffing plan†

• note (*): when it is windless (v_wind < 5 m/s), optical pointing may be performed.
• note: CH = Chihori Hara, HB = Hiroyuki Baji, JU = Junko Ueda, KM = Kazuyuki Muraoka, TT = Takashi Tsukagoshi, YS = Yoshito Shimajiri, YT = Yoichi Tamura, YW = Yoshimasa Watanabe

Subref measurement overview†

はじめに - 背景と獲得目標†

獲得目標は下記のとおり。

• 副鏡位置X, Y, ZのEL依存性を決定（従来どおり）

#ref(): File not found: "subref_geom.png" at page "Observation and Analysis/SubRef"

図：副鏡位置座標XYZΦの定義

測定の概要†

簡単にフォーカスを合わせる†

• 測定
  • 指示書： jupzb8.start (for B8QM), jupzc3.start (for CATS345)
  • subref offset (dx, dy, dz) = (0, 0, 0) とする
• 解析
  • contを使用
  • axial focus point をさがすには、こちらのURLを参照。http://www2.nao.ac.jp/~aste-www/obslog_wiki/pukiwiki/index.php?Observing%20Log%2F2010-07-27#md6dc9dc

副鏡位置X,Y,ZのEL依存性の測定†

連続波ポインティング/ビームマッピングによる器差追い込み†

外気温変化時の副鏡位置変化の測定 (advanced)†

最適なtilt位置の測定 (advanced)†

comment†