https://casaguides.nrao.edu/index.php?title=Split&feed=atom&action=historySplit - Revision history2024-03-29T01:14:22ZRevision history for this page on the wikiMediaWiki 1.38.6https://casaguides.nrao.edu/index.php?title=Split&diff=16912&oldid=prevJott: Replaced content with "{{split}}"2015-05-18T20:34:34Z<p>Replaced content with "{{split}}"</p>
<p><b>New page</b></p><div>{{split}}</div>Jotthttps://casaguides.nrao.edu/index.php?title=Split&diff=9938&oldid=prevConversion script: moved Split to split: Converting page titles to lowercase2012-03-16T20:43:24Z<p>moved <a href="/index.php?title=Split" title="Split">Split</a> to <a href="/index.php?title=Split" title="Split">split</a>: Converting page titles to lowercase</p>
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</td></tr></table>Conversion scripthttps://casaguides.nrao.edu/index.php?title=Split&diff=75&oldid=prevJgallimo: Created page with '== Help on split task: == <pre> Create a visibility subset from an existing visibility set Split is the general purpose program to make a new data set that is a subs…'2009-10-30T15:03:59Z<p>Created page with '== Help on split task: == <pre> Create a visibility subset from an existing visibility set Split is the general purpose program to make a new data set that is a subs…'</p>
<p><b>New page</b></p><div>== Help on split task: ==<br />
<br />
<pre><br />
Create a visibility subset from an existing visibility set<br />
<br />
<br />
Split is the general purpose program to make a new data set<br />
that is a subset of an existing data set. General selection parameters<br />
are included, and any combination of the three data columns (data, model<br />
and/or corrected) can be selection.<br />
<br />
Split is often used after the initial calibration of the data to remove those<br />
sources which need additional flagging, imaging and self-calibration. The data<br />
can be averaged over specified frequency channels of the input data set and time<br />
averaging is also available. <br />
<br />
Note: It is not yet possible to simultaneously average a data set in time and frequency<br />
in one execution: they must be done separately.<br />
<br />
<br />
Keyword arguments:<br />
vis -- Name of input visibility file<br />
default: none; example: vis='ngc5921.ms'<br />
outputvis -- Name of output visibility file<br />
default: none; example: outputvis='ngc5921_src.ms'<br />
<br />
datacolumn -- Which data column to split out<br />
default='corrected'; example: datacolumn='data'<br />
Options: 'data', 'model', 'corrected', 'all',<br />
'data,model','data,corrected','model,corrected',<br />
note: 'all'='data,model,corrected' <br />
<br />
--- Data Selection (see help par.selectdata for more detailed<br />
information)<br />
<br />
field -- Select field using field id(s) or field name(s).<br />
[run listobs to obtain the list id's or names]<br />
default: ''=all fields If field string is a non-negative<br />
integer, it is assumed to be a field index<br />
otherwise, it is assumed to be a field name<br />
field='0~2'; field ids 0,1,2<br />
field='0,4,5~7'; field ids 0,4,5,6,7<br />
field='3C286,3C295'; field named 3C286 adn 3C295<br />
field = '3,4C*'; field id 3, all names starting with 4C<br />
spw -- Select spectral window/channels<br />
default: ''=all spectral windows and channels<br />
spw='0~2,4'; spectral windows 0,1,2,4 (all channels)<br />
spw='<2'; spectral windows less than 2 (i.e. 0,1)<br />
spw='0:5~61'; spw 0, channels 5 to 61<br />
spw='0,10,3:3~45'; spw 0,10 all channels, spw 3 - chans 3 to 45.<br />
spw='0~2:2~6'; spw 0,1,2 with channels 2 through 6 in each.<br />
spw = '*:3~64' channels 3 through 64 for all sp id's<br />
spw = ' :3~64' will NOT work.<br />
spw = '*:0;60~63' channel 0 and channels 60 to 63 for all IFs <br />
';' needed to separate different channel ranges in one spw<br />
spw='0:0~10;15~60'; spectral window 0 with channels 0-10,15-60<br />
spw='0:0~10,1:20~30,2:1;2;4'; spw 0, channels 0-10,<br />
spw 1, channels 20-30, and spw 2, channels, 1, 2 and 4<br />
width -- Defines the number of channel to average to form the one<br />
output channel.<br />
default: '1' => no channel averaging<br />
example: width=[2,3] => average 2 channels of 1st<br />
spectral window selected and 3 in the second one.<br />
antenna -- Select data based on antenna/baseline<br />
default: '' (all) If antenna string is a non-negative<br />
integer, it is assumed to be an antenna index<br />
otherwise, it is assumed to be an antenna name.<br />
antenna='5&6'; baseline between antenna index 5 and index 6.<br />
antenna='VA05&VA06'; baseline between VLA antenna 5 and 6.<br />
antenna='5&6;7&8'; baseline 5-6 and 7-8<br />
antenna='5'; all baselines with antenna 5<br />
antenna='5,6,10'; all baselines with antennas 5 and 6<br />
timebin -- Value for time averaging.<br />
default='0s' (no averaging); example: timebin='30s'<br />
example '10' means '10s' <br />
timerange -- Select data based on time range:<br />
default = '' (all); examples,<br />
timerange = 'YYYY/MM/DD/hh:mm:ss~YYYY/MM/DD/hh:mm:ss'<br />
Note: if YYYY/MM/DD is missing date, timerange defaults to the<br />
first day in the dataset<br />
timerange='09:14:0~09:54:0' picks 40 min on first day<br />
timerange='25:00:00~27:30:00' picks 1 hr to 3 hr 30min<br />
on next day<br />
timerange='09:44:00' data within one integration of time<br />
timerange='>10:24:00' data after this time<br />
array -- (Sub)array number range<br />
default: ''=all<br />
uvrange -- Select data within uvrange (default units meters)<br />
default: ''=all; example:<br />
uvrange='0~1000klambda'; uvrange from 0-1000 kilo-lambda<br />
uvrange='>4klambda';uvranges greater than 4 kilo-lambda<br />
uvrange='0~1000km'; uvrange in kilometers<br />
scan -- Scan number range<br />
default: ''=all<br />
</pre></div>Jgallimo