AIPS NRAO AIPS HELP file for VLBACCOR in 31DEC18



As of Tue Jun 19 17:41:49 2018


VLBACCOR: Applies digital sampling correction to VLBA data

INPUTS

INNAME                             Input file name
INCLASS                            Input file class
INSEQ                              Input file sequence number
INDISK                             Disk number for input file
          VLBACCOR is defined in the VLBAUTIL run file.

HELP SECTION

VLBACCOR
Type: Procedure
Use:  VLBACCOR is a procedure that applies digital sampling corrections
      to VLBA data.  These corrections are added to the corrections in the
      highest numbered CL table.

      Type RUN VLBAUTIL to define the VLBACCOR procedure.

  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 of a file matching INNAME,
             INCLASS, and INDISK.
  INDISK.....The disk drive number of the file to be corrected. Zero defaults
             to any disk.

EXPLAIN SECTION

VLBACCOR:           Procedure to apply digital sampling corrections
Documentor:         Amy Mioduszewski
Related Programs:   VLBAUTIL, ACCOR, SNSMO, CLCAL


VLBACCOR determines amplitude corrections for digital sampling effects,
removes bad points, and applies these corrections to the highest numbered
calibration (CL) table attached to the input file.

You should run VLBACCOR after correcting the polarization labels (if
necessary).

VLBACCOR should be used along with VLBABPSS and VLBAAMP instead of
VLBACALA.  This redesign of the amplitude calibration path is based on
VLBA Scientific Memo #37 (Craig Walker).  VLBACCOR should NEVER be used
with VLBACALA.  The new recommended steps for amplitude calibration are:
  1) Do preliminary calibration steps that are necessary (e.g., VLBAFIX,
      VLBAEOPS, VLBATECR...).
  2) VLBACCOR -- digital sampling corrections
  3) VLBAMPCL (or VLBAPCOR) -- remove instrumental delay
  4) VLBABPSS -- do bandpass and correct auto-correlations
  5) VLBAAMP -- a priori amplitude calibration
  6) Continue with calibration.


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