[daip] How should I interpret this?

Leonia Kogan lkogan at aoc.nrao.edu
Wed Jul 19 10:22:39 EDT 2000


Johan,

>Is this bad data?

I'd recomend you to look your data by LISTR without flagging (FLAGVER=-1) 
and without calibration (DOCALIB=-1). Then you will see if your raw data 
are good or bad.

Leonia

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>From owner-daip at kochab.cv.nrao.edu Wed Jul 19 02:00 MDT 2000
Date: Wed, 19 Jul 2000 09:54:28 +0200 (SAST)
From: Johan van der Walt <johan at fskdjvdw.puk.ac.za>
To: Help for AIPS <daip at cv3.cv.nrao.edu>
Subject: [daip] How should I interpret this?
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I have started the editing and calibration of the data of a run we had
on the VLA in June. 

I have followed the procedure in section 4.3.1 (initial editing) and
noted that for a specific calibrator the values are round about 800 -
900 for about the first 40 seconds on the source. For the remaining 80
seconds on the source the values given by LISTR are between 80 and 90,
ie 10 times smaller than during the first 40 seconds. This applies to
all baselines. It also seems to occur only for one specific calibrator
source but not for everytime when it was observed.

Is this bad data? 

Johan



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