<casaxml xsi:schemaLocation="http://casa.nrao.edu/schema/casa.xsd file:///opt/casa/code/xmlcasa/xml/casa.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://casa.nrao.edu/schema/psetTypes.html">
<task category="imaging, calibration" name="ft" type="function">
<shortdescription>Insert a source model as a visibility set</shortdescription>
A source model (souce.model image) or components list is converted
into model visibilities that is inserted into the MODEL_DATA column or
alternatively is stored in the header of the MS to be served on the
Setjy will automatically make this ft step on the sources currently
available, which are 3C48, 3C138, 3C147, 3C286 at 1.4, 5.0, 8.4, 15,
22, 43 GHz. Their location is site dependent. In Charlottesville and
Socorro, the models are in
/usr/lib(lib64)/casapy/data/nrao/VLA/CalModels.
<param mustexist="true" name="vis" type="path">
<shortdescription>Name of input visibility file</shortdescription>
<description>Name of input visibility file
Example: vis='ngc5921.ms'
<param name="field" type="string">
<shortdescription>Select field using field id(s) or field name(s)</shortdescription>
<description>Select field using field id(s) or field name(s)
BUT, only one source can be specified in a
field = '1328+307' specifies source
field = '4' specified field with index 4
<param name="spw" type="string">
<shortdescription>Select spectral window/channels</shortdescription>
<description>Select spectral window/channels
Default: '' (all spectral windows and channels)
<param name="model" type="any">
<shortdescription>Name of input model image(s)</shortdescription>
<description>Name of input model image(s)
model='/usr/lib/casapy/data/nrao/VLA/CalModels/3C286_X.im'
NOTE: The model visibilities are scaled from the
model frequency to the observed frequency of the
<param name="nterms" type="int">
<shortdescription>Number of terms used to model the sky frequency dependence</shortdescription>
<description>Number of terms used to model the sky frequency
Default: 1 (one model image is required)
Example: nterms=3 - represents a 2nd order
Taylor-polynomial in frequency and should be
used in conjuction with coefficient model
model=['xxx.model.tt0','xxx.model.tt1',
<param subparam="true" name="reffreq" type="string">
<shortdescription>Reference frequency (e.g. \'1.5e+9\' or \'1.5GHz\')</shortdescription>
<description>Reference-frequency about which this Taylor-expansion is
Default: '' (reads the reference frequency from