[daip] PCAL possibly broken for CPARM(1)=1

[Leonia Kogan]

Hi Michael,

You are right as usual. PCAL has not averaged IFs repeating instead the
first IF. Even more, PCAL has not averaged frequencies inside of an IF.
Instead it has taken the first frequency at each IF. This is really bad.

Eric showed me the place where PCAL should average both frequencies (always) 
and IFs under control of CPARM. 
The data for finding solution are prepared (to be averaged or not) by 
PCLSEL. Inside of PCLSEL there is PCLCOP and inside of PCLCOP there is 
PCLAVG which carries out the frequency/IF averaging.

Erronoously both the number of IFs and frequencies to be averaged was put 
equaled 1 through the CATBLK(KINAX+..) which was fixed to one at the 
beginning of PCLCOP.

I have fixed it and will put the fixed version at the system tonight.

Thank you for the pointing out to the error.

Leonia

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>From owner-daip at kochab.cv.nrao.edu Thu May  3 08:35 MDT 2001
Date: Wed, 2 May 2001 15:56:33 -0500 (CDT)
From: Michael Bietenholz <michael at polaris.phys.yorku.ca>
To: aipsmail at cv3.cv.nrao.edu
Subject: [daip] PCAL possibly broken for CPARM(1)=1
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  I just tried running PCAL (31DEC01) and averaging the IFs, and I
noticed the solutions were exactly the same as the IF=1 solutions when
NOT averaging the IFs.  This seems unlikely to be correct.

I suspect PCAL actually only uses the IF=1 data when you tell it to
average the IFs, and I couldn't see in a brief look at the program
where it did actually average over IFs.  Apologies if I'm wrong on
this...

              michael b


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