[daip] Re: CLCOR position shifts (fwd)

[Leonia Kogan]

Andreas,

>I FITLDed the raw data from the tapes again, but the apparent 
>coordinates are still not correct.

What's the difference?

I'll fitld something here and let you know the result

Leonia

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>From brunthal at mpifr-bonn.mpg.de Fri Sep  6 06:38 MDT 2002
Date: Fri, 06 Sep 2002 14:38:55 +0200
From: Andreas Brunthaler <brunthal at mpifr-bonn.mpg.de>
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To: Leonia Kogan <lkogan at zia.aoc.NRAO.EDU>
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Subject: Re: CLCOR position shifts (fwd)
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Leonia,

I FITLDed the raw data from the tapes again, but the apparent 
coordinates are still not correct. I'm using AIPS 31DEC02.
Is the mistake in FITLD still there or is it fixed?

Andreas

Leonia Kogan wrote:
> Andreas,
> 
> You wrote:
> 
> 
>>The J2000 coordinates are the same in the SCHED output and the SU-Table. 
>>The apparent coordinates are different from the SU-Table.
> 
> 
> I think this is the answer.
> 
> Can you edit your original SU table (ofcource copiing it before) by TABED
> to get the apparent coordinates identical with SCHED output?
> 
> Now
> 
> Socorro correlator use only epoch coordintes. FITLD (in AIPS) calculates 
> the apparent coordinates and put them into SU table. Approximately  a year
> ago, we found a mistake in FITLD's calculation of the apparent coordinates.
> 
> So if you FITLDed your data long time ago you could have a mistake in
> the apparent coordinates at the SU table.
> 
> Leonia



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