[daip] problem with VLBAPCOR

[Matthew L Lister]

I've noticed some unusual behavior of VLBAPCOR in the 31DEC07 and 
31DEC08 releases, I'm
enclosing two possm plots for dataset BC077B (the same problem has 
occurred in other datasets
as well). The first one is the result of running VLBAPCOR with the 
31DEC05 version, the
latter is the 31DEC08 version. Notice how the phases are not aligned 
correctly for the
FD-HN baseline in the 31DEC08 version (POSSM_2.PS) but are correctly 
aligned in the 31DEC05 version (POSSM_3.PS).

Here are the inputs:

AIPS 1: VLBAPCOR: Procedure to correct instrumental phases
AIPS 1: Adverbs     Values                 Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: INNAME     'BC077B'                Input UV file name (name)
AIPS 1: INCLASS    'FQ-3'                  Input UV file name (class)
AIPS 1: INSEQ         1                    Input UV file name (seq. #)
AIPS 1: INDISK        1                    Input UV file disk unit #
AIPS 1: TIMERANG      0           3        Time range of a calibrator
AIPS 1:               8           2         1-4 = start day,hr,min,sec
AIPS 1:               0           3         5-8 = end   day,hr,min,sec
AIPS 1:              11          58        MUST BE SPECIFIED
AIPS 1: REFANT        2                    Ref. antenna, 0=>the first
AIPS 1: SUBARRAY      0                    Subarray;  0 => all.
AIPS 1: CALSOUR    *all ' '                Calibrator source name;
AIPS 1:                                    blank => any
AIPS 1: GAINUSE       0                    CL table to use; 0=>highest
AIPS 1:                                    ADVERBS FOR ANTENNAS NOT
AIPS 1:                                    CONTAINED IN PC TABLE:
AIPS 1: INVER         1                    Input  PC table, 0=>last one
AIPS 1: OPCODE     ' '                     'CALP' if you are missing PC
AIPS 1:                                    information for any antenna;
AIPS 1:                                    otherwise ' '
AIPS 1: ANTENNAS   *all 0                  antennas for which manual
AIPS 1:                                    phase corrections should be
AIPS 1:                                    obtained (i.e. they are
AIPS 1:                                    missing from the PC table or
AIPS 1:                                    are the pcals in PC table are
AIPS 1:                                    incorrect).
AIPS 1:

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