[daip] CLCOR in 31DEC10 AIPS

[Eric Greisen]

Alberto Sanna wrote:
> Dear Dr. Greisen,
> 
> I am reducing a VLBA data set, observed on November 2008,
> with the 31DEC10 AIPS version updated with the MDJ.
> I am running into a problem when using the task CLCOR
> to shift the position of a given source. In the following,
> you can find the inputs I used for CLCOR and the message from AIPS,
> where you can see a bad conversion of the apparent source position:
>
> CLCOR     Task CLCOR  (release of 31DEC10) begins
> CLCOR     CL version input   1 output   2
> CLCOR     SOUMOD: change in Epoch    RA,DEC -6.30000E-02  2.30000E-
> 02 asec
> CLCOR     SOUMOD: change in Apparent RA,DEC  5.58811E+04  1.69386E+04
> asec

There appears to be an issue with FITLD when it loads some partially 
processed data sets (not FITS IDI but processed through an AIPS script)
in which the apparent positions are way wrong.  I am about to debug this 
matter.  Do not use the 31DEC10 CLCOR results, they are wrong.

Eric Greisen