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Version 1.9 Build 1556

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newsimulator.setmosaicfield - Function

	Package	synthesis
	Module	newsimulator
	Tool	newsimulator

Set observed mosaic fields

Synopsis
setmosaicfield(sourcename, calcode, fieldcenter, xmosp, ymosp, mosspacing, distance)

Description
Set mosaic fields by internally invoking setfield multiple times. Currently only handle a rectangular mosaicing pattern. Either setfield or setmosaicfield must be invoked at least once before observe. If the distance to the object is set then the phase term includes a curvature for the near-field effect at the center of the image.

Arguments

sourcename		Name of source or field (must be specified).
		Allowed:	String
		Default:	'unknown'
calcode		Calibration code
		Allowed:	String
		Default:	''
fieldcenter		Coordinates of mosaic field center
		Allowed:	MDirection
xmosp		Number of mosaic pointing in horizontal direction
		Allowed:	Int
		Default:	1
ymosp		Number of mosaic pointing in vertical direction
		Allowed:	Int
		Default:	1
mosspacing		Spacing between mosaic pointings
		Allowed:	Quantity
		Default:	'1arcsec'
distance		Distance to the object
		Allowed:	String
		Default:	'0km'

Example

  mysim.setconfig(telescopename='VLA', x=xx, y=yy, z=zz, dishdiameter=diam,
                mount='alt-az', antname='VLA',
                coordsystem='local', referencelocation=dm.observatory('vla'));
                                                                                
  mysim.setspwindow(spwname='XBAND', freq='8GHz', deltafreq='50MHz',
                   freqresolution='50MHz', nchannels=1, stokes='RR
                   LL');
  dir0 := dm.direction('B1950',  '16h00m0.0', '50d0m0.000')
  mysim.setmosaicfield(sourcename='SIMU1', fieldcenter=dir0,
                       xmosp=2, ymosp=2, mosspacing='154.5arcsec');
  mysim.settimes(integrationtime='10s');
  mysim.observe('SIMU1_1', 'XBAND', starttime='0s', stoptime='100s');
  mysim.observe('SIMU1_2', 'XBAND', starttime='110s', stoptime='210s');
  mysim.observe('SIMU1_3', 'XBAND', starttime='220s', stoptime='320s');
  mysim.observe('SIMU1_4', 'XBAND', starttime='330s', stoptime='430s');

In this example, a 2x2 mosaic pattern is set centered around the direction specified (dir0). The setmosaicfield name each mosaic field with i sourcename+'_i', where i= 1..4.