[daip] PCCOR stopping

[Eric Greisen]

Arnaud Collioud wrote:
> Dear AIPS gurus,
> 
> I am trying to extract the phase-cal info from a PC-table to a SN-table using the task PCCOR using the following parameters:
> 
> AIPS 1: PCCOR     Corrects phases using  PCAL tones data from PC table
> AIPS 1: Adverbs     Values                 Comments
> AIPS 1: ----------------------------------------------------------------
> AIPS 1: INNAME     'GC034A_X'              Input UV file name (name)
> AIPS 1: INCLASS    'UV'                    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      1          19        Timerange of a calibrator
> AIPS 1:               5          49         1-4 = start day,hr,min,sec
> AIPS 1:               1          19         5-8 = end   day,hr,min,sec
> AIPS 1:               6          48        Has to be specified!!!
> AIPS 1: SNVER         0                    Output SN table, 0=>new table
> AIPS 1: INVER         2                    Input  PC table, 0=>last one
> AIPS 1: REFANT        3                    Ref. antenna, 0=>the first
> AIPS 1: SUBARRAY      1                    Subarray;  0 => all.
> AIPS 1: FREQID       0                    Freq. ID to select; 0 => 1.
> AIPS 1: CALSOUR    '0133+476'              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
> 
> It ends with the following error:
> 
> PCCOR1: Writing to SN table   7
> PCCOR1: Stop because number of tones <2
> PCCOR1: Purports to die of UNNATURAL causes
> PCCOR1: localhost    31DEC11 TST: Cpu=       0.0  Real=       0
> 
> I checked the PC-table and  it is specified that NO_TONES=1in the header.
> The data was correlated at Soccoro and the PC-table I am using was directly incorporated to the fits file.
> 
> How should I proceed to get the corresponding SN-table? Is it possible with only one cal-tone?

Two tones (at least) are required to get the calibration.

Eric Greisen