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[[Commissioning and Science Verification]]

* Subref z-position offsets > Measurement and analysis for single-beam receivers [#hf8ab16d]

:Revision history|
-- 2016-07-26 - created by Kamazaki,T.

:Table of contents|
#contents

----

** Preparations [#x63fca06]

+ Login to COSMOS3 manager GUI with Group=''asteXX'' (e.g. aste17) and Project=''sbref''
+ Tune the receiver to be used
+ Run ''CONT qlook (qlookc)'' from cos3launcher
-- Push the ''START'' button.

** Measurement [#ve2c46c0]

+ Adjust pointing using either of the following observation tables
#br
|CENTER: Planet|CENTER: Receiver|CENTER: Obs. file|h
|Jupiter|DASH345|jpx5d3.start|
|~|BAND8|jpx5b8.start|
|Saturn|DASH345|stx5d3.start|
|~|BAND8|stx5b8.start|
#br
-- Auto-pointing is available toward bright planets.
-- Turn on auto-pointing on the CONT qlook if necessary.
+ Measure z-position of the sub-reflector by running either of the following observation tables
#br
|CENTER: Planet|CENTER: Receiver|CENTER: Obs. file|h
|Jupiter|DASH345|jpsbd3z.start|
|~|BAND8|jpsbb8z.start|
|Saturn|DASH345|stsbd3z.start|
|~|BAND8|stsbb8z.start|

** Analysis [#p592e97c]
+ Login to an analysis computer (e.g. aste-ms1/aste-mx3) with account=''asteXX'' (e.g. aste17)
+ Change to the data directory of the project
 asteXX@aste-ms1: cd ~/sbref/continuum/data
+
 e.g.)
 aste17@aste-ms1: cd ~/sbref/continuum/data/
 aste17@aste-ms1: pwd
 /home/aste17/sbref/continuum/data
+ Rsync CONT data from the ASTE site
 asteXX@aste-ms1: ~/analysis/bin/cont_rsync.sh <project> <obs. table> <time (YYYY-MM-DD)>
+
 e.g.)
 aste17@aste-ms1: ~/analysis/bin/cont_rsync.sh sbref stsbd3z 2017-04-27
 * rsync -e ssh -avz astecntl@aste-1c:/cosmos3/aste/bklog/{contlck,contraw}/curr/CONT.stsbd3z*.aste17.sbref.20170427*.{LCK,RAW} /home/aste17/sbref/continuum/data/
 ...
 CONT.jpsbb8z.aste17.sbref.201704270013.LCK    <--- downloaded files are listed
 ...
+ Run lck_sbrfz.py
 asteXX@aste-ms1: ~/analysis/bin/lck_sbrefz.py <channel> <a downloaded file>
 channel: "-c 1" for CH1, "-c 2" for CH2
+
 e.g.)
 aste17@aste-ms1: ~/analysis/bin/lck_sbrefz.py -c 1 CONT.jpsbb8z.aste17.sbref.201704270013.LCK 
 *** the following parameters are assumed
 ***   dummy scan duration = 10.0 seconds
 ***   start dz =  -3.0 seconds
 ***   stop  dz = +13.0 seconds
 # plot fit results
 * -> ddz [sample] = 185.261260
 * -> ddz [mm]     = -0.035820
&ref(CONT.jpsbb8z.aste17.sbref.201704270013.png,,50%);

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