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NRAO Home > CASA > CASA Cookbook and User Reference Manual |
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8.2.1.5 sdcoadd
infiles -- list of names of input SD dataset
antenna -- antenna name or id (only effective for MS input).
fluxunit -- units for line flux
options: ’K’,’Jy’,’’
default: ’’ (keep current fluxunit of the first data in the infiles)
>>> fluxunit expandable parameter
telescopeparm -- the telescope characteristics
options: (str) name or (list) list of gain info
default: ’’ (none set)
example: if telescopeparm=’’, it tries to get the telescope
name from the data.
Full antenna parameters (diameter,ap.eff.) known
to ASAP are
’ATPKSMB’, ’ATPKSHOH’, ’ATMOPRA’, ’DSS-43’,
’CEDUNA’,’HOBART’. For GBT, it fixes default fluxunit
to ’K’ first then convert to a new fluxunit.
telescopeparm=[104.9,0.43] diameter(m), ap.eff.
telescopeparm=[0.743] gain in Jy/K
telescopeparm=’FIX’ to change default fluxunit
see description below
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
>>>timeaverage expandable parameter
tweight -- weighting for time average
options: ’none’
’var’ (1/var(spec) weighted)
’tsys’ (1/Tsys**2 weighted)
’tint’ (integration time weighted)
’tintsys’ (Tint/Tsys**2)
’median’ ( median averaging)
default: ’none’
polaverage -- average polarizations
options: (bool) True,False
default: False
>>>polaverage expandable parameter
pweight -- weighting for polarization average
options: ’none’
’var’ (1/var(spec) weighted)
’tsys’ (1/Tsys**2 weighted)
default: ’none’
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 infiles 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.
See the sdcal description for note on GBT raw SDFITS format data.
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
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