[daip] problem with AP94 data
Leonia Kogan
lkogan at aoc.nrao.edu
Fri Jun 7 12:08:53 EDT 2002
Martin,
Your problem can be related with adding PT antenna to VLA.
I see that output of PRTAN has all antenna name as VLA:OUT but
the 29th antenna name is VLA:VPT.
I need to wait Eric return back from the vacation June 12.
Now you can copy the AN table (by the task 'tacop') from your new A-array
observations.
Leonia
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>From daip-admin at donar.cv.nrao.edu Fri Jun 7 09:13 MDT 2002
From: Data Analysts <analysts at aoc.nrao.edu>
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Subject: [daip] problem with AP94 data
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Date: Fri, 7 Jun 2002 09:12:14 -0600 (MDT)
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Hi Eric or Amy (whoever reads this),
This dataset is loaded on Lisa Foley's machine
if you want to look at it.
Meri
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>From M.Hardcastle at bristol.ac.uk Fri Jun 7 07:21 MDT 2002
Subject: problem with AP94 data
To: analysts at cv3.cv.nrao.edu
Date: Fri, 7 Jun 2002 14:21:15 +0100 (BST)
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From: Martin Hardcastle <M.Hardcastle at bristol.ac.uk>
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Status: RO
Dear analysts,
I have a problem with the AP94.850526.C BAND dataset that you recently
received from the archive for me -- I wonder if you can help me to get
around it? The AN table lists all the antennae I would expect, but
their relative positions are all zero: PRTAN output looks like this:
scorpius PRTAN(31DEC02) 2502 07-JUN-2002 14:15:01 Page 1
File=AP94.850526 .C BAND. 1 An.ver= 1 Vol= 4 User= 2502
Array= VLA Freq= 4885.100000 MHz Ref.date= 26-MAY-1985
Array reference position in meters (Earth centered)
Array BX= -1601185.36500 BY= -5041977.54700 BZ= 3554875.87000
Polar X = 0.00000 Polar Y = 0.00000 arcsec
Earth rotation rate = 360.9856449721 degrees / IAT day
GST at UT=0 = 243.5101273389 degrees
UT1-UTC= 0.0000000 Data time(IAT )-UTC= 0.0000000 seconds
Solutions not yet determined for a particular FREQID
Mount=ALAZ Axis offset= 0.0000 meters IFA IFB
Feed polarization type = R L
Ant 1 = VLA:OUT BX= 0.0000 BY= 0.0000 BZ= -0.0093
Ant 2 = VLA:OUT BX= 0.0000 BY= 0.0000 BZ= -0.0093
Ant 3 = VLA:OUT BX= 0.0000 BY= 0.0000 BZ= -0.0093
Ant 4 = VLA:OUT BX= 0.0000 BY= 0.0000 BZ= -0.0093
[...]
Ant 26 = VLA:OUT BX= 0.0000 BY= 0.0000 BZ= -0.0093
Ant 27 = VLA:OUT BX= 0.0000 BY= 0.0000 BZ= -0.0093
Ant 28 = VLA:OUT BX= 0.0000 BY= 0.0000 BZ= -0.0093
Ant 29 = VLA:VPT BX= 0.0000 BY= 0.0000 BZ= 0.0000
Of course this doesn't stop me from calibrating the data or making an
image. However, I want to combine this dataset with my new A-array
observations. To do this, I need to use UVFIX to precess the data to
J2000 co-ordinates. And, of course, that uses the AN table and
therefore sets all the u,v,w co-ordinates in the data to zero.
Can you help me? I don't know why the AN table is zero in this
dataset, but it must be possible to find an AN table for the
appropriate date that I could use. Any advice would be appreciated.
Regards,
Martin
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