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Basic Information on uvtsub
Task: uvtsub
Purpose: Subtract time-averaged "background" visibilities
Categories: uv analysis
UVTSUB subtracts a time-averaged background level from each
baseline.
WARNING: This program does not apply gains. Since gain corrections
are time-dependent, they must be applied to the data
before subtraction is carried out, or else subtraction
will not work correctly.
Key: vis
The name of the input uv data-set. No default.
Key: out
The name of the output uv data-set. No default.
Key: select
The normal uv selection commands. The default is copy everything.
Key: bckgrnd
The time interval used to determine the average visibilities
for subtraction. This must be in the standard select= format,
e.g.
bckgrnd=time(12:15:30,12:18:20),time(12:25:30,12:26:00)
would select two intervals to be used to determine the
"background" level for subtraction.