[daip] Problem with PCCOR

[Eric Greisen]

Andrzej Marecki wrote:
> Dear All,
> 
> I get the following message from PCCOR when reducing the data produced by 
> DiFX correlator:
> 
> PCCOR1 15:46:25 Number of tones <2 because 2*NIF (=16)*NPOL(= 1) exceeds
> PCCOR1 15:46:25 number of available PC detectors (equaled 16)
> PCCOR1 15:46:25 Purports to die of UNNATURAL causes
> 
> The data header reads as follows:
> 
> AIPS 1: Image=MULTI     (UV)         Filename=BM341       .MSORT .   1
> AIPS 1: Telescope=VLBA               Receiver=VLBA
> AIPS 1: Observer=BM341               User #=  340
> AIPS 1: Observ. date=15-DEC-2010     Map date=26-SEP-2012
> AIPS 1: # visibilities    370019     Sort order  TB
> AIPS 1: Rand axes: UU-L-SIN  VV-L-SIN  WW-L-SIN  TIME1  BASELINE
> AIPS 1:            SOURCE  FREQSEL  INTTIM  GATEID  CORR-ID
> AIPS 1: ----------------------------------------------------------------
> AIPS 1: Type    Pixels   Coord value     at Pixel     Coord incr   Rotat
> AIPS 1: COMPLEX      3   1.0000000E+00       1.00  1.0000000E+00    0.00
> AIPS 1: STOKES       1  -2.0000000E+00       1.00 -1.0000000E+00    0.00
> AIPS 1: FREQ        16   2.2156552E+10       0.56  5.0000000E+05    0.00
> AIPS 1: IF          16   1.0000000E+00       1.00  1.0000000E+00    0.00
> AIPS 1: RA           1    00 00 00.000       1.00       0.000000    0.00
> AIPS 1: DEC          1    00 00 00.000       1.00       0.000000    0.00
> AIPS 1: ----------------------------------------------------------------
> 
> ... and the following parameters are passed to PCCOR:
> 
> AIPS 1: PCCOR     Corrects phases using  PCAL tones data from PC table
> AIPS 1: Adverbs     Values                 Comments
> AIPS 1: ----------------------------------------------------------------
> AIPS 1: INNAME     'BM341'                 Input UV file name (name)
> AIPS 1: INCLASS    'MSORT'                 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           9        Timerange of a calibrator
> AIPS 1:              27           5         1-4 = start day,hr,min,sec
> AIPS 1:               0           9         5-8 = end   day,hr,min,sec
> AIPS 1:              35          47        Has to be specified!!!
> AIPS 1: SNVER         0                    Output SN table, 0=>new table
> AIPS 1: INVER         0                    Input  PC table, 0=>last one
> AIPS 1: REFANT        9                    Ref. antenna, 0=>the first
> AIPS 1: SUBARRAY      0                    Subarray;  0 => all.
> AIPS 1: FREQID        1                    Freq. ID to select; 0 => 1.
> AIPS 1: CALSOUR    'J0927+3902'            Calibrator source name;
> AIPS 1:            *rest ' '               blank => any
> AIPS 1: CUTOFF        0                    Cable correction:
> AIPS 1:                                    1 => switch off
> AIPS 1:                                    0 => switch on
> AIPS 1: BIF           0                    Lowest IF number 0=>1
> AIPS 1: EIF           0                    Highest IF number 0=>NIF
> AIPS 1:                                    Use BIF=EIF=0 except for
> AIPS 1:                                    special cases (see help)
> AIPS 1: DELCORR       0                    1 => zero MBDELY.
> AIPS 1:                                    Use zero always except for
> AIPS 1:                                    special cases (see help)
> AIPS 1: FLDSIZE    *all 0                  Array(by IFs) of the first,
> AIPS 1:                                    second tones
> AIPS 1:                                    0=> the smallest and largest
> AIPS 1:                                        (by frequency) tone
> 
> The PC table looks fine when viewed with SNPLT (OPTYPE='CCAL').

I agree that the message is amazingly confusing, but the PC table seems 
to be telling the task that there is only 1 tone.  Can you run PRTAB on 
the PC table and send me all of the output (but set EPRINT=3 or so).

Eric Greisen