NRAO Home > CASA > CASA Toolkit Reference Manual
simulator.setmosaicfield - Function

2.6.1 Set observed mosaic fields


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





Inputs

sourcename

Name of source or field (must be specified).

allowed:

string

Default:

SOURCE

’unknown’

calcode

Calibration code

allowed:

string

Default:

fieldcenter

Coordinates of mosaic field center

allowed:

any

Default:

variant

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:

any

Default:

variant 1arcsec

distance

Distance to the object

allowed:

any

Default:

variant 0m

Returns
bool

Example

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

__________________________________________________________________


More information about CASA may be found at the CASA web page

Copyright 2010 Associated Universities Inc., Washington, D.C.

This code is available under the terms of the GNU General Public Lincense


Home | Contact Us | Directories | Site Map | Help | Privacy Policy | Search