CASA Parameter Dictionary

Parameter DescriptionSorted descending Comments
datacolumn Which data set column to use Options: 'DATA'(raw),'MODEL_DATA','CORRECTED_DATA'
weighting Weighting to apply to visibilities Options: 'natural','uniform','briggs','radial',superuniform'
bandname VLA frequency band Options: '4','P','L','C','X','U','K','Q'
timebin Value for time averaging '-1s' indicates no averaging
  Used in: split
  Used in: split
  Used in: split
  Used in: setjy
  Used in: setjy
  Used in: plotxy, split
  Used in: plotxy
  Used in: plotxy
  Used in: plotxy
  Used in: plotants, plotxy
  Used in: mosaic
  Used in: mosaic
  Used in: mosaic
  Used in: listobs
  Used in: importuvfits
  Used in: importarchive
  Used in: importarchive
  Used in: fluxscale
  Used in: fluxscale
  Used in: fluxscale
  Used in: feather
  Used in: feather
  Used in: correct
  Used in: contsub
  Used in: contsub
  Used in: contsub
  Used in: clean, mosaic
  Used in: clean, mosaic
  Used in: clean, mosaic
  Used in: clean, mosaic
  Used in: clean, mosaic
  Used in: clean, mosaic
  Used in: clean, invert, mosaic
  Used in: clean, feather, mosaic
  Used in: bandpass, gaincal
  Used in: bandpass, fluxscale, gaincal
  Used in: bandpass, correct, gaincal
  Used in: bandpass, correct, gaincal
  Used in: bandpass, correct, gaincal
  Used in: bandpass, correct, gaincal
  Used in: bandpass, correct
  Used in: bandpass, correct
  Used in: bandpass, contsub, gaincal
  Used in: bandpass, clean, gaincal, invert, mosaic, split
  Used in: bandpass, clean, gaincal, invert, mosaic, split
  Used in: bandpass, clean, gaincal, invert, mosaic, split
  Used in: bandpass, clean, contsub, gaincal, invert, mosaic
  Used in: bandpass, clean, contsub, correct, flagautocorr, fluxscale, gaincal, importarchive, importasdm, importuvfits, invert, listhistory, listobs, mosaic, plotants, plotxy, setjy, split
  Used in: **
  Used in:
  Used in:
  Used in:
  Used in:
  Used in:
  Used by:
fitmode Use of the continuum fit model Options: 'subtract','replace','model'
mode Type of data selection Options: 'none','channel','velocity'
transfer Transfer field name(s)  
freqtolerance Tolerance in frequency shift in naming spectral windows  
stokes Stokes parameters to image Options: 'I','IV','IQU','IQUV'
start Start channel (0-relative), velocity Used when mode = 'channel','velocity'
spwid Spectral window index identifier 0-based
fluxdensity Specified flux density [I,Q,U,V] in Jy  
solint Solution interval (sec)  
timerange Select time range for subset of data timerange='YYY/MM/DD/HH:MM:SS.sss'
timerange='< YYYY/MM/DD/HH:MM:SS.sss'
timerange='> YYYY/MM/DD/HH:MM:SS.sss'
timerange='ddd/HH:MM:SS.sss'
timerange='< ddd/HH:MM:SS.sss'
timerange='> ddd/HH:MM:SS.sss'
gainselect Select subset of calibration solutions from gaintable  
rmode Robustness mode Used for weighting = 'briggs'
reference Reference field name (transfer flux from)
refant Reference antenna  
channels Range of channels to fit  
yaxis Quantity to plot on the y-axis Options: 'amp','phase'
xaxis Quantity to plot on the xaxis Options: 'azimuth','baseline','channel','elevation','hourangle','parallacticangle','time','u','uvdist'
fitorder Polynomial order for fit  
subplot Plot option for multi-panel ploArEtting subplot=yxn, where y=number of y panels, x=number of x panels, n=panel number for the current display starting at the top left
caltable Output calibration table  
msselect Optional subset of the data to select (field, spw,time,etc) See: http://aips2.nrao.edu/docs/notes/199/199.html
tau Opacity value to apply if opacity = True
niter Number of iterations Set to 0 for no CLEANing
nchan Number of channels to select Used when mode = 'channel'
mask Name(s) of mask image(s) used for CLEANing  
fluxtable Name of output, flux-scaled calibration table  
outputvis Name of output visibility file (MS)  
imagename Name of output image(s) For clean and mosaic, this will be appended with .residual, .model and .image
lowres Name of low resolution (single dish) image  
fitsfile Name of input UV FITS file  
highres Name of high resolution (interferometer) image  
minpb Minimum primary beam level to use  
gain Loop gain for CLEANing  
verbose List each observation in addition to summary True or False
vis Input visibility file CASA MeasurementSet on disk
step Increment between channels Used when mode = 'channel','velocity'
constpb In Sault weighting, the flux scale is constant above this value  
alg Imaging algorithm to use Options: 'clark','hogbom','csclean','multiscale','mfclark','mfhogbom','mfmultiscale'
imsize Image size in spatial pixels (x,y)  
scaletype Image plane flux scale type Options: 'SAULT','NONE'
gaintable Gain calibration solutions table
threshold Flux level at which to stop CLEANing Units=mJy
standard Flux density standard Options: 'Baars','Perley 90','Perley-Taylor 95','Perley-Taylor 99'
fieldid Field index identifier 0-based
correlations Correlations Options: 'RR','LL','RR LL','XX','YY','XX YY'
width Channel width (value > 1 indicates channel averaging)
cell Cell size [x,y] Units=arcsec
robust Brigg's robustness parameter Options: -2.0 (close to uniform) to 2.0 (close to natural)
bptable Bandpass calibration solutions table  
gaincurve Apply VLA antenna gain curve correction True or False
opacity Apply opacity correction True or False

-- JosephMcMullin - 21 Sep 2006
Topic revision: r4 - 2013-02-13, PatrickMurphy
This site is powered by FoswikiCopyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding NRAO Public Wiki? Send feedback