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Basic Information on uvaflag
Purpose: Use flags in one visibility dataset to flag another.
UVAFLAG is a MIRIAD task which flags correlations in one
visibility dataset based on the flag status of matching
correlations in a template dataset.
The template dataset should be a subset of the visibility dataset
being flagged, and the order of records in the two datasets
should be the same. Normally correlations in the template and
visibility datasets are matched by comparing time, polarisation,
baseline, bin and frequency. However options `nopol',`nofreq'
and 'nobin' can turn off the matching of polarisation, frequency
and bin number.
The input visibility file to be flagged. No default.
The template input visibility file. The default is the same
as the `vis' dataset. This default makes no sense without the
`nopol' or `nofreq' options. Several files can be given.
Wildcards are supported.
Normal visibility selection, which is applied to the template
dataset. See the help on select for more information.
Extra processing options. Several can be given, separated by
Minimum match is supported. Possible values are:
nopol The polarisation of the records in the template are
ignored. If any polarisation in the template is
flagged, then all polarisations in the input are flagged
This can be useful when applying flagging based on one
polarisation type (e.g. stokes V) to the other
nofreq The frequency of the correlations in the template are
ignored. If any channel in the template is flagged, then
all channels in the input are flagged. This can be
useful when applying flagging based on a `channel-0'
nobin The bin numbers of the correlations in the template are
ignored. If any bin in the template is flagged, then
all bins in the input are flagged. This can be useful
when applying flagging based on a bin averaged dataset.
freq The first baseline of the template is read and the
flags are applied to all times, baselines and bins
in the input. This can be useful when applying spectral
flags based on a small sample of data or time averaged
data. Option freq implies nobin. It can be combined
with nopol, but not with nofreq.
noapply Do not apply the flagging, just report the statistics
about what would be flagged.
Revision: 1.5, 2012/04/17 02:08:46 UTC
Generated by email@example.com on 21 Jun 2016