[daip] forwarded message from Eric Greisen

[Eric Greisen]

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From: Eric Greisen <egreisen at nrao.edu>
To: Matt Lister <mlister at physics.purdue.edu>
Cc: Eric Greisen <egreisen at nrao.edu>
Subject: Re: problems with CALIB
Date: Wed, 8 Sep 2004 09:44:24 -0600

Thanks - I picked up your data and tried the same inputs.
Unfortunately, in 31DEC04 with or without optimizations and in 31DEC03
I get the same result:

primat> CALIB2: Writing SN table    4
primat> CALIB2: Found         9102 good solutions
primat> CALIB2: Failed on      185 solutions
primat> CALIB2:                185 solutions had insufficient data
primat> CALIB2: Adjusting solutions to a common reference antenna
primat> CALIB2: Applying solutions to data
primat> CALIB2:            Previously flagged   Flagged by gain         Kept
primat> CALIB2: Partially                 1067                 794      1067
primat> CALIB2: Fully                       76                   0      3734
primat> CALIB2: Copied AN file from vol/cno/vers  2   17   1 to  2   21   1
primat> CALIB2: Appears to have ended successfully
primat> CALIB2: primate      31DEC03 NEW: Cpu=       0.4  Real=       1

I ran differences on the outputs incl 31DEC04 with WEIGHTIT=1 which I
would expect to be the same as 31DEC03 but they are not by almost as
much as 31DEC03 and 31DEC04 differ with WEIGHTIT=0.  In any case the
results are quite similar (peak dif 0.05 Jy).

So why do you not get this result?  I do not know.  I would ask
questions such as what compiler are you using (and OS)?  If you are on
Solaris I should repeat the tests on that OS - I used Linux.  The MNJ
can sometimes fail to compile subroutines when it should - at least
some Solaris systems have had this problem.  One can reset the dates
in LASTCOMRPL.DAT and LASTCOMLNK.DAT and run a MNJ to try this fix.

Eric Greisen
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