<param type="string" name="combine"><shortdescription>Data axes which to combine for solve (obs, scan, spw, and/or field)</shortdescription><description>Data axes which to combine for solve (obs, scan, spw, and/or field)</description>
<casaxml xsi:schemaLocation="http://casa.nrao.edu/schema/casa.xsd file:///opt/casa/code/xmlcasa/xml/casa.xsd" xmlns="http://casa.nrao.edu/schema/psetTypes.html" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<task type="function" name="polcal" category="calibration">
<shortdescription>Determine instrumental polarization calibrations</shortdescription>
The complex instrumental polarization factors (D-terms) for each antenna/spwid
are determined from the data for the specified calibrator sources. Previous
calibrations can be applied on the fly.
<param type="path" name="vis" mustexist="true"><shortdescription>Name of input visibility file</shortdescription><description>Name of input visibility file</description>
<param type="string" name="caltable"><shortdescription>Name of output gain calibration table</shortdescription><description>Name of output gain calibration table</description>
<param type="string" name="field"><shortdescription>Select field using field id(s) or field name(s)</shortdescription><description>Select field using field id(s) or field name(s)</description>
<param type="string" name="spw"><shortdescription>Select spectral window/channels</shortdescription><description>Select spectral window/channels</description>
<param type="string" name="intent"><shortdescription>Select observing intent</shortdescription><description>Select observing intent</description>
<param type="bool" name="selectdata"><shortdescription>Other data selection parameters</shortdescription><description>Other data selection parameters</description>
<param type="string" name="timerange" subparam="true"><shortdescription>Select data based on time range</shortdescription><description>Select data based on time range</description>
<param type="any" name="uvrange" subparam="true"><shortdescription>Select data within uvrange (default units meters)</shortdescription><description>Select data within uvrange (default units meters)</description>
<param type="string" name="antenna" subparam="true"><shortdescription>Select data based on antenna/baseline</shortdescription><description>Select data based on antenna/baseline</description>
<param type="string" name="scan" subparam="true"><shortdescription>Scan number range</shortdescription><description>Scan number range</description>
<param type="any" name="observation" subparam="true"><shortdescription>Select by observation ID(s)</shortdescription><description>Select by observation ID(s)</description>