1.3.2.0 msmetadata.exposuretime

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msmetadata.exposuretime - Function

1.3.2 Get the exposure time for the specified scan, spwid, polarizaiton ID, array ID, and observation ID.

Description

Get the exposure time for the specified scan, spwid, polarizaiton ID, array ID, and observation ID. This is the exposure time of the record with the lowest time stamp of the records associated with these parameters. Returns a quantity dictionary. If polid is not specified (or specified and negative) and there is only one polarization ID in for the specified combination of scan, spwid, obsID, and arrayID, then that polarization ID is used. If there are multiple polarization IDs for the combination of other parameters, a list of these is logged and an empty dictionary is returned.

Arguments


Inputs
scan	Scan number.
	allowed:	int
	Default:	0
spwid	Spectral window ID.
	allowed:	int
	Default:	0
polid	Polarization ID.
	allowed:	int
	Default:	-1
obsid	Observation ID.
	allowed:	int
	Default:	0
arrayid	Array ID.
	allowed:	int
	Default:	0

Returns
record

Example

    msmd.open("my.ms")
    # get the exposure time for scan 1, spwid 2, and polid 3
    # for obsid=0 and arrayid=0
    integration_time = msmd.getexposuretime(scan=1, spwid=2, polid=3)
    msmd.done()

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