AIPS NRAO AIPS HELP file for VLBAFIX in 31DEC18



As of Tue Jun 19 9:54:12 2018


VLBAFIX: Procedure to fix (sort etc.) VLBA data

INPUTS

INNAME                             Input file name
INCLASS                            Input file class
INSEQ                              Input file sequence number
INDISK                             Disk number for input file
CLINT                              CL entry interval (min)
                                   0 => 0.25 minute.
OUTDISK                            Disk number for output file
SUBARRAY                           0 -> NO SUBARRAYS
                                   1 -> put everything into one
                                        subarray
                                   2 -> automatically split into
                                        multiple subarrays

          VLBAFIX is defined in the VLBAUTIL run file.

HELP SECTION

VLBAFIX
Type: Procedure
Use:  VLBAFIX is a procedure that will sort, correct subarrays,
      split into different frequencies, indexes VLBA data and
      merges calibration tables, if necessary.  This is designed
      to replace VLBASUBS, VLBAFQS VLBAFPOL, and VLBAMCAL.

      Type RUN VLBAUTIL to make the VLBAFIX procedure available.
      NOTE: NEVER ABORT THIS PROCEDURE WHILE IT IS RUNNING, IT
            COULD CAUSE YOUR ORIGINAL DATA FILE TO BE DESTROYED.

  INNAME.....The name of the file to be corrected. Wildcard characters are
             allowed.
  INCLASS....The class of the file to be corrected. Wildcard characters are
             allowed.
  INSEQ......The sequence number of the file to be corrected. Zero defaults
             to the highest sequence number matching INNAME, INCLASS, and
             INDISK.
  INDISK.....The disk drive number of the file to be corrected. Zero defaults
             to any disk.
  CLINT......Calibration table interval in minutes. This should normally be in
             the range 0.25 to 1.0 and is used when the calibration table is
             regenerated. A calibration interval of 0.25 minute will be assumed
             if this is less than or equal to zero.
  OUTDISK....The disk drive number for the output files, if any are produced.
  SUBARRAY...Set to 0 if there are no subarrays, 1 if everything should be
             into one subarray, or 2 if data should be split into mulitple
             subarrays.
             This tells VLBAFIX whether to run USUBA or not.

EXPLAIN SECTION

VLBAFIX:            Procedure to fix data from the VLBA correlator
Documentor:         Amy Mioduszewski
Related Programs:   MSORT, USUBA, UVCOP, INDXR, VLBAFPOL, VLBAUTIL,
                    TAMRG, VLBAMCAL

VLBAFIX can be run on any VLBA data set loaded into AIPS, it
will only perform fixes to the data that are necessary.  It
runs in these steps:
1) Test the data see if it is in time-baseline (TB) order, if the
   first index (NX) or calibration (CL) tables are present, if it is
   multifrequency, if it has only one stokes, and if the GC, TY and PC
   tables need merging.
2) If tables need merging, it runs VLBAMCAL
3) If it is out of TB order, then it sorts it with MSORT
4) If the input SUBARRAY > 1 it fixes the subarray nomenclature with
   USUBA
5) If it is multifrequency, it splits the data into single frequency
   files (with UVCOP) and the file is indexed with INDXR.
6) If it has only one stokes, then VLBAFPOL is run to fix the
   polarization structure.
7) If step 4 has not been performed and the first NX or CL table
   are missing, it creates the NX and/or CL tables with INDXR.
VLBAFIX is designed to replace VLBASUBS, VLBAFQS and VLBAFPOL.

NEVER ABORT THIS PROCEDURE WHILE IT IS RUNNING, IT COULD
CAUSE YOUR ORIGINAL DATA FILE TO BE DESTROYED.

You should run VLBAFIX after you have finished loading the data
but before load any calibration data for non-VLBA telescopes, or
apply the calibration data.

VLBAFIX is intended for all levels of VLBA users.

NOTE: This program will split the frequencies in experiments where
S band (13 cm) and X band (4 cm) or 90 cm and 50 cm are observed
simultaneously (as well as multiple FREQIDs).  However, it WILL
NOT split data where 90 cm, 50 cm and 18 cm are observed
simultaneously correctly.

AIPS