[daip] Re: AIPS-DBCON

[Eric Greisen]

Shinji Horiuchi writes:
 > Hi Eric,
 > 
 > Thank you for the information. So I understand that DBCON can form a file like
 > with RR and LL in different subarrays if I change one of the Stokes label
 > but there is no simple way to reproduce Stokes parameters, like V in this case,
 > using AIPS tasks for the file. Is it correct?
 > 
 > In fact the original fits files are the ones I created from 
 > Swinburne-LBA software
 > correlator output. My goal is to be able to generate proper fits 
 > files for AIPS analysis.
 > The program so far only generates single source format files, and for 
 > multi source
 > files I need to form by hand in AIPS using MULTI and DBCON several times
 > and it works so far. I was expecting the similar thing for multi 
 > polarization files
 > but it appears impossible, according to what you says, and it seems I 
 > should better
 > spend time to modify my program to write visibilities of RR, LL etc. 
 > in the same
 > uv-data entry.
 > 

That would help.  Alternatively, the FUDGE paraform task could be
modified to read in 2 files and write one with the RR and LL as part
of the data array STOKES axis.  That is if the two match exactly.

BLOAT is an example where the frequency axis gets expanded and data
then added in becuase of multi-pass correlators.

Eric Greisen