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NRAO Home > CASA > CASA Task Reference Manual |
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0.1.137 uvsub
Requires:
Synopsis
Subtract/add model from/to the corrected visibility data.
Description
This function subtracts model visibility data (MODEL_DATA column) from
corrected visibility data (CORRECTED_DATA column) leaving the residuals
in the corrected data column. If the parameter ’reverse’ is set true, the process
is reversed. Note the DATA column is left untouched. If the ms has no
CORRECTED _DATA column, one is made, copying DATA column, ahead of
doing the uvsub process
Arguments
Inputs |
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vis |
| Name of input visibility file (MS)
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| allowed: | string |
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| Default: |
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reverse |
| reverse the operation (add rather than subtract)
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| allowed: | bool |
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| Default: | False |
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void
Example
Help for uvsub task
This function subtracts model visibility data from corrected visibility
data leaving the residuals in the corrected data column. If the
parameter ’reverse’ is set true, the process is reversed.
Please note the model visibility used is the one that has been saved in the MODEL_DATA of the MS and the
CORRECTED_DATA column is the one that is modified. If no CORRECTED_DATA column exists in the MS, one will be created and
a copy of the DATA column is saved in it before the uvsub operation selected is performed. uvsub does not modify the DATA column.
Keyword arguments:
vis -- Name of input visibility file (MS)
default: none; example: vis=’ngc5921.ms’
reverse -- Reverse the operation (add rather than subtract)
default: False; example: reverse=true
uvsub(vis=’ngc5921.ms’, reverse=False)
More information about CASA may be found at the
CASA web page
Copyright © 2016 Associated Universities Inc., Washington, D.C.
This code is available under the terms of the GNU General Public Lincense
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