[daip] Problems with polarization calibration in AIPS 31DEC09

[Eric Greisen]

Luis F. Rodriguez wrote:
> Dear Friends of AIPS: I am having problems doing the continuum polarization
> calibration with AIPS 31DEC09.
> I have no problems with an older version of AIPS (31DEC05).
> 
> I can do the regular continuum calibration with no problem.
> I run PCAL apparently OK, but when I try to use RLDIF to
> see the Right - Left phase difference, I get
> the following message:
> 
> AURIGA> RLDIF1: Task RLDIF  (release of 31DEC09) begins
> AURIGA> RLDIF1: UVGET: Using flag table version   1 to edit data
> AURIGA> RLDIF1: UNKNOWN POLARIZATION PARAMETERIZATION ='
> AURIGA> RLDIF1: NO USABLE POLCAL INFORMATION AVAILABLE IN AN TABLE
> AURIGA> RLDIF1: PERHAPS DOPOL SHOULD BE FALSE
> AURIGA> RLDIF1: MATXUV: ERROR  10 DETERMINING UV-FILE PARAMETERS
> AURIGA> RLDIF1: returns adverbs to AIPS
> AURIGA> RLDIF1: Purports to die of UNNATURAL causes

Oddly - this sounds very familiar but I can't any mention of it in the 
CHANGE.DOC files.  The keyword POLTYPE is supposed to be written into 
the AN table by PCAL and then read by tasks trying to do DOPOL > 0.

Try PRTAB on the AN file and send me the output.  It is clear that the 
routine that reads the AN table needs to be more careful about bad 
values but you should not have a bad value...

Eric Greisen