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Usage notes for generating a multi-frequency VLA beam
Python scripts require:
Numpy
pyFITS
pyrap
Setup:
multiBeamGen.py has a few hardcoded values that need to be changed.
cbBin : the full path to cassbeam executable
c2fScript : the full path to the cass2fits.py script
Examples:
1. Generating a set of beam FITS files based on the freqneucies in a VLA measurement set:
multiBeamGen.py -f 3C147-C-LO.MS -t vla-template.in -o vla_1330_1519 -p 512 --pixelsperbeam=64 -c
-f : measurement set to determine the frequency information
-t : cassBeam input file, see the cassbeam documentation
-o : output filename prefix
-p : number of pixels in the output file (it is actually +1, so 512 returns a 513 x 513 pixel image)
--pixelsperbeam : pixels across the primary lobe for the lowest frequency
generated files:
[prefix]_xx_im.fits
[prefix]_xx_re.fits
[prefix]_xy_im.fits
[prefix]_xy_re.fits
[prefix]_yx_im.fits
[prefix]_yx_re.fits
[prefix]_yy_im.fits
[prefix]_yy_re.fits
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