casa6

<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="uvsub" category="manipulation, calibration">

        <shortdescription>Subtract/add model from/to the corrected visibility data.</shortdescription>

        <description>

        This function subtracts model visibility data (MODEL_DATA column) from corrected visibility

        data (CORRECTED_DATA column) leaving the residuals in the corrected data column.  If the

        parameter 'reverse' is set true, the process is reversed. Note the DATA column is left untouched.

        If the ms has no CORRECTED _DATA column, one is made, copying DATA column, ahead of doing the 

        uvsub process

        </description>

        <input>

                <param type="path" name="vis" mustexist="true"><shortdescription>Name of input visibility file (MS)</shortdescription><description>Name of input visibility file (MS)</description>

                        <value/>

                        <example>vis='ngc5921.ms'</example>

                </param>

​

                <param type="bool" name="reverse"><shortdescription>reverse the operation (add rather than subtract)</shortdescription><description>reverse the operation (add rather than subtract)</description>

                        <value>False</value>

                </param>

​

                <constraints>

                </constraints>

        </input>

<returns type="void"/>

​

<example>

        Help for uvsub task

​

        This function subtracts model visibility data from corrected visibility

        data leaving the residuals in the corrected data column.  If the

        parameter 'reverse' is set true, the process is reversed.

        Please note the model visibility used is the one that has been saved in the MODEL_DATA of the MS and the 

        CORRECTED_DATA column is the one that is modified. If no CORRECTED_DATA column exists in the MS, one will be created and 

        a copy of the DATA column is saved in it  before the uvsub operation selected is performed. uvsub does not modify the DATA column.

​

        Keyword arguments:

        vis -- Name of input visibility file (MS)

                default: none; example: vis='ngc5921.ms'

        reverse -- Reverse the operation (add rather than subtract)

                default: False; example: reverse=true

​

        uvsub(vis='ngc5921.ms', reverse=False)

​

 </example>

 </task>

 </casaxml>