AIPS HELP file for VLBAFQS in 31DEC25

As of Sun Mar 16 23:14:11 2025

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 files
                                   0 => highest with space

          VLBAFQS is defined in the VLBAUTIL run file.

HELP SECTION

VLBAFQS
Type: Procedure
Use:  VLBAFQS is a procedure that copies each frequency ID in an input
      file to a separate output file. Each output file has the same
      name as the input file and class 'FQ-n' where n is the frequency
      ID.  If the input file contains only one frequency ID then no new
      files will be created.

  INNAME.....The name of the input file. Wildcard characters are
             allowed.
  INCLASS....The class of the input file. Wildcard characters are
             allowed.
  INSEQ......The sequence number of the input file. Zero defaults to the
             highest sequence number for a file matching INNAME,
             INCLASS, and INDISK.
  INDISK.....The disk drive number of the input file.  Zero defaults to
             any disk.
  CLINT......Calibration table interval in minutes. This should normally
             be in the range 0.25 to 1.0. A calibration interval of 0.25
             minute will be assumed if this value is negative or zero.
             Use the same value that you used in VLBALOAD or FITLD.
  OUTDISK....If positive then all output files will be written to the
             specified disk.  If zero then output files will be written
             to the highest disk with sufficient space (this may be
             different for each output file)

EXPLAIN SECTION

VLBAFQS:            Procedure to copy frequency IDs to separate files
Documentor:         Chris Flatters
Related Programs:   VLBAUTIL, UVCOP, INDXR, VLBAFIX

VLBAFIX is the more modern of these procedures, it includes VLBAFQS
as well as other procedures which "fix" (sort, index etc.) the data
after it is loaded, so you are encouraged to use VLBAFIX rather than
VLBAFQS.

WHEN TO USE VLBAFQS

Use VLBAFQS to split data with different frequency into separate files.
Most AIPS tasks can only handle a single frequency at a time so there
is no benefit to keeping more than one frequency in a file.

VLBAFQS will normally be run after searching for subarrays (VLBASUBS)
and before fixing polarization labels (VLBAFPOL).

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.