<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" ?>
<casaxml xmlns="http://casa.nrao.edu/schema/psetTypes.html"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://casa.nrao.edu/schema/casa.xsd
file:///opt/casa/code/xmlcasa/xml/casa.xsd">
<task type="function" name="ft" category="imaging, calibration">
<shortdescription>Insert a source model 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 fly when requested. This is
needed to use more complicated sources than setjy provides; e.g resolved source
or off centered sources in gaincal. (Setjy will
automatically make this ft step.)
The sources currently available are 3C48, 3C138, 3C147, 3C286
at 1.4, 5.0, 8.4, 15, 22, 43 GHz. Their location is site
dependent. In Charlottesville and at the SOC, the models are
in /usr/lib/casapy/data/nrao/VLA/CalModels.
<param type="string" name="vis" mustexist="true">
<description>Name of input visibility file (MS)</description>
<param type="string" name="field">
<description>Field selection</description>
<param type="string" name="spw">
<description>Spw selection</description>
<param type="any" name="model">
<description>Name of input model image(s)</description>
<value type="string"></value>
<param type="int" name="nterms">
<description>Number of terms used to model the sky frequency dependence</description>
<param type="string" name="reffreq" subparam="true">
<description>Reference frequency (e.g. \'1.5e+9\' or \'1.5GHz\')</description>
<param type="string" name="complist">
<description>Name of component list</description>
<param type="bool" name="incremental">
<description>Add to the existing model visibility?</description>