[daip] QUALifier and FREQids

[Eric Greisen]

Lorant Sjouwerman writes:

 > I have an observation with 2 freq-IDs and each also has its qualifier.
 > For the second FREQ/qualifier I want to calibrate each IF separately.
 > I split off the freq-IDs and IFs with uvcop and get for all a new
 > freq-ID = 1 (as reported by LISTR) but the qualifier is untouched.
 > [I know that I can run DQUAL and DFQID to avoid any problems, but I
 > thought this was not necessary in this case after UVcopying them out]

       After UVCOP you still have all sources in the source table and
so qual=-1 selects both sources and so a multi-source header is
returned from the cal system and imagr refuses to procede.  It does
not know that there are no data and it is too complicated for UVCOP to
re-write source tables and renumber them.

 > 
 > then when after calibration IMAGR on a multisource file help says that
 > QUAL = -1 does all qualifiers, but this seems not true - it refuses
 > to run if I set sources (msg: only one source must be specified),
 > until I set it to the exact qualifier for the source.

   Well - but if there is only a qual 2 and you say qual = 1 it should
fail.  It means any value is okay and it says lots of places that only
one source may be selected.

 > 
 > A similar thing happens when I request only one source and leave
 > QUAL=-1 in CALIB with a model - it works when leaving out the model
 > or specifying the qualifier - again not what is advertised in help

   Same code, same result.  If you want 1 source then you must select
one source, one way or another.

 > 
 > Finally it seems that getjy is also confused because if you split two
 > FREQID (or IFs?) it will report a flux in the second freq-ID, not the one I 
 > expected to be present (ie number one after uvcop and indxr) - see message
 > 
 > eu    > GETJY1: Task GETJY  (release of 31DEC07) begins
 > eu    > GETJY1:    Source:Qual      CALCODE IF  Flux (Jy)
 > eu    > GETJY1: 1751-253        :  1   B     1    0.00000 +/-  -1.00000
 > eu    > GETJY1: 1751-253        :  2   B     1    0.37325 +/-   0.00880
 > eu    > GETJY1: WARNING: All requested fluxes were NOT determined.
 > eu    > GETJY1: Appears to have ended successfully
 > eu    > GETJY1: localhost    31DEC07 TST: Cpu=       0.0  Real=       0

I would have to see the contents of the FQ table and SU table and CL
table to know about this.  This suggests that you lacked fluxes for
the ref cals or solutions or ??

Eric Greisen