[daip] RE: Archived data "AT272"

[Eric Greisen]

Data Analysts writes:
 > 
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 > >From cwtsai at astro.UCLA.EDU  Wed Nov 17 15:08:18 2004
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 > From: "Chao-Wei Tsai" <cwtsai at astro.UCLA.EDU>
 > To: "'Data Analysts'" <analysts at aoc.nrao.edu>
 > Subject: RE: Archived data "AT272"
 > Date: Wed, 17 Nov 2004 14:08:06 -0800
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 > Hi Meri:
 > 
 > Thank you very much. I got the file already. Since it is 130 MB in size, I
 > assumed it contains both XH02010/file_11 and XH02010/file_12 (105 MB and 30
 > MB, according to "NRAO Archive Data Base Query Results.")
 > 
 > On the other hand, the Q band data shows that all antennas were out in the
 > output of PRTAN task. I checked the observing Log online, and see nothing
 > serious happened in Q-band observation during AT272 run on that day. Is
 > there something wrong with the data? Can I just use the K-band AN table for
 > Q-band data with FREQ key changed to be Q-band frequency?

What version of aips are you running?  At these very short
wavelengths, when using Pie Town, the VLA has to shift its "center".
AIPS was not told about this for years and so only moderately recently
was able to apply the appropriate corrections to the antenna stations
for the shifted center.  The routine that writes the AN table, looks
at the antenna station locations and finds the station name.  If the
locations have not been corrected, it will not find them.  This
appears to be the case in your data.  You should get a modern version
of aips.

Eric Greisen