AIPS HELP file for VLBACCOR in 31DEC21
As of Fri Dec 4 4:41:26 2020
VLBACCOR: Applies digital sampling correction to VLBA data
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.
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
INCLASS....The class of the file to be corrected. Wildcard characters are
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.
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
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,
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.