1.3.2.0 msmetadata.phasecenter

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msmetadata.phasecenter - Function

1.3.2 Get the phasecenter direction from a field ID and time if necessary

Description

Get a direction measures for the phasecenter of the field id and time specified

Arguments


Inputs
fieldid	Zero-based field ID for which to get the phasecenter; default fieldid=0
	allowed:	int
	Default:	0
epoch	Optional time, expressed as a measures epoch dictionary, if field id has a polynomial in time phasecenter or an ephemerides table attached to the ID. Default value means evaluate at the origin TIME in the FIELD table
	allowed:	record
	Default:

Returns
record

Example

    msmd.open("my.ms")
    # get phasecenter for field ID 1
    mydir = msmd.phasecenter(1);
    # if the phasecenter is a polynomial or has an ephemerides attached to
    # it a time is needed to get the phase direction
    ep=me.epoch(’utc’, ’2015/03/15/15:30:55’)
    mydir2=msmd.phasecenter(2, ep)
    msmd.done()

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