casa6

<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">

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​

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<task category="manipulation" name="fixvis" type="function">

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<shortdescription>Recalculates (u, v, w) and/or changes Phase Center </shortdescription>

<description>

       Recalculates (u, v, w) and/or changes Phase Center.

​

       If the phase center is changed, the corresponding modifications

       are applied to the visibility columns given by the parameter

       "datacolumn" which is by default set to "all" (DATA, CORRECTED,

       and MODEL).

</description>

​

<input>

    <param mustexist="true" kind="ms" name="vis" type="path">

<shortdescription>Name of input visibility file</shortdescription>

<description>Name of input visibility file

                     Default: none

​

                        Example: vis='ngc5921.ms'

</description>

        <value/>

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

    </param>

​

    <param kind="ms" name="outputvis" type="string">

<shortdescription>Name of output visibility file</shortdescription>

<description>Name of output visibility file

                     Default: '' (same as vis)

​

                        Example: outputvis='ngc5921_out.ms'

</description>

        <value/>

        <example>vis='ngc5921fixedvis.ms'</example>

    </param>

​

    <param name="field" direction="in" type="any">

<shortdescription>Select field using field id(s) or field name(s)</shortdescription>

<description>Select field using field id(s) or field name(s)

                     Default: '' (all fields)

                     Use 'go listobs' to obtain the list id's or

                     names. If field string is a non-negative integer,

                     it is assumed a field index,  otherwise, it is

                     assumed a field name.

​

                        Examples:

                        field='0~2'; field ids 0,1,2

                        field='0,4,5~7'; field ids 0,4,5,6,7

                        field='3C286,3C295'; field named 3C286 and

                        3C295

                        field = '3,4C*'; field id 3, all names

                        starting with 4C

</description>

      <any type="variant"/>

      <value>&quot;&quot;</value>

    </param>

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    <param name="refcode" type="string">

<shortdescription>reference frame to convert UVW coordinates to</shortdescription>

<description>Reference frame to convert UVW coordinates to

                     Default: '' (refcode of PHASE_DIR in the FIELD

                     table)

​

                        Example: refcode='B1950'

</description>

      <value/>

    </param>

​

    <param name="reuse" type="bool">

<shortdescription>base UVW calculation on the old values?</shortdescription>

      <description>Base UVW calculation on the old values?

                     Default: True

                     Options: True|False

​

                     Note: ignored if parameter 'phasecenter' is set

</description>

      <value>True</value>

    </param>

​

    <param name="phasecenter" type="string">

<shortdescription>use this direction as phase center</shortdescription>

<description>If set to a valid direction: change the phase center for

the given field to this value

                     If given without the equinox, e.g. '0h01m00s

                     +00d12m00s', the parameter is interpreted as a

                     pair of offsets in RA and DEC to the present

                     phasecenter.

​

                        Example: phasecenter='J2000 9h25m00s

                        -05d12m00s'

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                     Note: The RA offset can be given in units of time

                     or angle. If given as a time (i.e. as a single

                     number with a time unit as in, e.g., 12s or in

                     the XXhXXmXXs or XX:XX:XX.XXX formats), it is

                     applied as is. If given as an angle (e.g.,

                     0.01deg), it is divided by the cos(DEC) before it

                     is applied.

</description>

      <value/>

    </param>

​

    <param name="distances" type="any">

<shortdescription>(experimental) List of the distances (as quanta) of the fields selected by field.</shortdescription>

<description>(experimental) List of the distances (as quanta) of the

fields selected by field.

                     Default: [] (the distances of all fields are

                     assumed to be infinity.)

​

                     If not a list but just a single value is given,

                     this is applied to all fields.

​

                        Examples: 

                        distances=['2E6km', '3E6km']   

                        distances='15au'

</description>

      <any type="variant"/>

      <value>&quot;&quot;</value>

    </param>

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    <param name="datacolumn" type="string">

<shortdescription>when applying a phase center shift, modify visibilities only in this/these column(s)</shortdescription>

<description>when applying a phase center shift, modify visibilities

only in this/these column(s)

                     Default: 'all' (DATA, CORRECTED, and MODEL)

​

                        Example: datacolumn='DATA,CORRECTED' (will not

                        modify MODEL)

</description>

      <value>all</value>

    </param>

​

</input>

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<example>

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For more information, see the task pages of fixvis in CASA Docs:

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https://casa.nrao.edu/casadocs/

​

</example>

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<returns>void</returns></task>

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</casaxml>