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Version 1.9 Build 1556

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dragon.setoutlier - Function

	Package	synthesis
	Module	imager
	Tool	dragon

Set the image parameters for an outlier field

Synopsis
setoutlier(name, nx, ny, cellx, celly, stokes, doshift, phasecenter, mode, nchan, start, step, spwid, fieldid)

Description
Define the image parameters for an outlier field. Any number of outlier fields may be defined, but each must have a unique name.

The phase center of the image defaults to that of the specified fieldid (the first if none is specified). A phase center may be also specified in an argument to setimage using any valid direction. If the conversion from the observed direction requires frame information then this is taken as follows:

• Direction information, including the coordinate system, is taken from the relevant entry in the Field table of the MeasurementSet.
• The epoch is taken from the time of observation of each visibility.
• A position is specified via the dragon tool function setoptions

Arguments

name		Name of output image
		Allowed:	String
		Default:	dragon.outlier.n
nx		Number of spatial pixels in x
		Allowed:	Int
		Default:	128
ny		Number of spatial pixels in y
		Allowed:	Int
		Default:	128
cellx		Cellsize in x (e.g. '1arcsec')
		Allowed:	Quantity
		Default:	'1arcsec'
celly		Cellsize in y (e.g. '1arcsec')
		Allowed:	Quantity
		Default:	'1arcsec'
stokes		Stokes parameters to image (e.g. 'IQUV')
		Allowed:	'I'|'IV'|'IQU'|'IQUV'
		Default:	'I'
doshift		Use the specified phase center? T or F
		Allowed:	Bool
		Default:	T
phasecenter		Direction of phase center as a measure
		Allowed:	MDirection
mode		Type of processing
		Allowed:	'mfs'|'channel'|'velocity'
		Default:	'mfs'
nchan		Number of channels
		Allowed:	Int
		Default:	1
start		Start channel (1-relative)
		Allowed:	Int
step		Step in channel
		Allowed:	Int
spwid		Spectral Window Ids (1 relative)
		Allowed:	Vector of Ints
		Default:	1
fieldid		Field Id (1 relative)
		Allowed:	Int
		Default:	1