[daip] APCAL oddity with "busy" file.

[Craig Walker]

I ran APCAL twice.  Before the second time, I checked that it was not 
flagged as busy.  Both times, at the end of the outputs, I see:

APCAL1: CATIO: CATBLK 166 IN USE, CAN'T WRITE
APCAL1: AMPCAL: ERROR   4 UPDATING HEADER ON DISK
APCAL1: GFINIS: number records used     257

The inputs are:

 >inp
AIPS 1: APCAL     Task to generate an amplitude calibration SN table
AIPS 1: Adverbs     Values                 Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: INNAME     'BW102_OQ208'           Input UV file name (name)
AIPS 1: INCLASS    'MULTI'                 Input UV file name (class)
AIPS 1: INSEQ         2                    Input UV file name (seq. #)
AIPS 1: INDISK        3                    Input UV file disk unit #
AIPS 1:
AIPS 1: ANTENNAS   *all 0                  Antennas to calibrate
AIPS 1: SUBARRAY      0                    Subarray 0 -> all
AIPS 1: STOKES     ' '                     Stokes type ('R','L',' ')
AIPS 1: BIF           0                    Start IF number
AIPS 1: EIF           0                    End IF number
AIPS 1: FREQID       -1                    Freq. ID to calibrate
AIPS 1: SOURCES    *all ' '                Sources to calibrate
AIPS 1: TIMERANG   *all 0                  Time range to calibrate
AIPS 1:
AIPS 1: TYVER         1                    TY table version number.
AIPS 1: GCVER         1                    GC table version number.
AIPS 1: SNVER         0                    Output SN table version.
AIPS 1:                                      0 -> highest unique
AIPS 1: OPCODE     'GRID'                  Opacity correction opcode:
AIPS 1:                                    '    ' -> no opacity corr.
AIPS 1:                                    'GRID','GRDR','OPAC','OPCR',
AIPS 1:                                      'LESQ' -> fit for opacity
AIPS 1: APARM         0           0        Calibration parameters:
AIPS 1:               1           0        (1) -> B factor (def. 1.0)
AIPS 1:               0           1        Opacity parameters:
AIPS 1:               5        *rest 0     (2) -> ZA limit (deg)
AIPS 1:                                    (3) >=0  use spillover
AIPS 1:                                             correction
AIPS 1:                                    (4) > 0  use all FQ in
AIPS 1:                                             opac. soln.
AIPS 1:                                    (5) Limit to sec(z) plotted
AIPS 1:                                    (6) > 0 => normalize Tsys
AIPS 1:                                        by average Tsys
AIPS 1:                                    (7) Use IF AP(7) for
AIPS 1:                                        normalization instead
AIPS 1: SOLINT        0                    Solution interval (min)
AIPS 1:                                       0 -> use all data
AIPS 1: INVERS        1                    WX table version number.
AIPS 1:                                       0 -> use text file
AIPS 1: CALIN      *all ' '                Text file with weather info.
AIPS 1:                                       Must be ' ' if using WX
AIPS 1:                                       table (INVERS).
AIPS 1: TRECVR     *all 0                    Receiver temperatures (K);
AIPS 1:                                       in (R,L) pairs.
AIPS 1: TAU0       *all 0                  Zenith opacities (per ant.)
AIPS 1: DOFIT         1           1        Fit type (per ant.)
AIPS 1:               1           1          -1 -> no opacity correction
AIPS 1:               1           1           0 -> apply TRECVR only
AIPS 1:               1           1           1 -> solve for Trec using
AIPS 1:               1           1                fitting method spec.
AIPS 1:               1           1                in OPCODE; then apply
AIPS 1:               1           1           1           1
AIPS 1:               1           1           1           1
AIPS 1:               1           1           1           1
AIPS 1:               1           1           1           1
AIPS 1:               1           1
AIPS 1: PRTLEV        0                    Print level
AIPS 1: DOTV         -1                    TV selection (<0 -> PL file)
AIPS 1: LTYPE         3                    Plot labeling
AIPS 1: GRCHAN        0                    TV Graphics channel to use


The opacity results look reasonable.
And the SN table is present and accounted for and looks ok in SNPLT.

Cheers,

Craig




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     R. Craig Walker            Array Operations Center
     cwalker at nrao.edu           National Radio Astronomy Observatory
     Phone  575 835 7247        P. O. Box O
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