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APPENDIX A. APPENDIX: SINGLE DISH DATA PROCESSING
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specunit -- units for spectral axis
options: (str) ’channel’,’km/s’,’GHz’,’MHz’,’kHz’,’Hz’
default: ’’ (=current)
example: this will be the units for masklist
frame -- frequency frame for spectral axis
options: (str) ’LSRK’,’REST’,’TOPO’,’LSRD’,’BARY’,
’GEO’,’GALACTO’,’LGROUP’,’CMB’
default: currently set frame in scantable
WARNING: frame=’REST’ not yet implemented
doppler -- doppler mode
options: (str) ’RADIO’,’OPTICAL’,’Z’,’BETA’,’GAMMA’
default: currently set doppler in scantable
scanaverage -- average integrations within scans
options: (bool) True,False
default: False
example: if True, this happens in read-in
For GBT, set False!
timeaverage -- average times for multiple scan cycles
options: (bool) True,False
default: False
example: if True, this happens after calibration
polaverage -- average polarizations
options: (bool) True,False
default: False
outfile -- Name of output file
default: ’’ (scantable)
example:
outform -- format of output file
options: ’ASCII’,’SDFITS’,’MS’,’ASAP’
default: ’ASAP’
example: the ASAP format is easiest for further sd
processing; use MS for CASA imaging.
If ASCII, then will append some stuff to
the outfile name
overwrite -- overwrite the output file if already exists
options: (bool) True,False
default: False
WARNING: if outform=’ASCII’, this parameter is ignored
DESCRIPTION:
Task sdcoadd merges multiple single dish spectral data given by a list of spectral data file names in
any of the following formats, ASAP, MS2, and SDFITS. The units of line flux, the units of spectral
axis, frame, and doppler are assumed to be those of the first one in the sdfilelist if not specified.
The timaverage and polaverage are used to perform time and polarization averaging over scans
on the merged scantable to obtained co-added spectra before saving to a file on disk.