Importvla

Help on importvla task:

Import VLA archive file(s) to a measurement set

     Imports an arbitrary number of VLA archive-format data sets into
     a casa measurement set.  If more than one band is present, they
     will be put in the same measurement set but in a separate spectral
     window.  The task will handle old style and new style VLA (after
     July 2007) archive data and apply the tsys to the data and to
     the weights.

     Keyword arguments:
     archivefiles -- Name of input VLA archive file(s)
             default: none.  Must be supplied
             example: archivefiles = 'AP314_A959519.xp1'
             example: archivefiles=['AP314_A950519.xp1','AP314_A950519.xp2']
     vis -- Name of output visibility file
             default: none.  Must be supplied.
             example: vis='NGC7538.ms'
             Will not over-write existing ms of same name.
             A backup flag-file version 'Original' will be made in
               vis.flagversions.  See help flagmanager
     bandname -- VLA Frequency band
             default: =>  = all bands
             example: bandname='K'
             Options: '4'=48-96 MHz,'P'=298-345 MHz,'L'=1.15-1.75 GHz,
             'C'=4.2-5.1 GHz,'X'=6.8-9.6 GHz,'U'=13.5-16.3 GHz,
             'K'=20.8-25.8 GHz,'Q'=38-51 GHz
     frequencytol -- Tolerance in frequency shift in making spectral windows
             default: => 150000 (Hz).  For Doppler shifted data, <10000 Hz may
             may produce too many unnecessary spectral windows.
             example: frequencytol = 1500000.0 (units = Hz)
     project -- Project name to import from archive files:
             default:  => all projects in file
             example: project='AL519'
             project = 'al519' or AL519 will work.  Do not include
             leading zeros; project = 'AL0519' will not work.
     starttime -- Time after which data will be considered for importing
             default:  => all:  Date must be included.
             syntax: starttime = '2003/1/31/05:05:23'
     stoptime --  Time before which data will be considered for importing
             default:  => all:  Date must be included.
             syntax: stoptime = '2003/1/31/08:05:23'
     applytsys -- Apply data scaling and weight scaling by nominal
             sensitivity (~Tsys)
             default: True.  Strongly recommended
     autocorr --  import autocorrelations to ms
             default:  => False (no autocorrelations)
     antnamescheme -- 'old' or 'new' antenna names.
             default => 'new' gives antnenna names
               'VA04' or 'EA13 for VLA telescopse 04 and 13 (EVLA)
               'old' gives names '04' or '13'
     keepblanks -- Should sources with blank names be filled into the data base
             default => false.  Do not fill
             These scans are tipping scans (as of June 1, 2009) and should not
             be filled in the visibility data set.
     evlabands -- Use the EVLA's center frequency and bandwidths for frequencies
             specified via wavelength or band. 
             default => True. 
     async --  Run asynchronously
             default = False; do not run asychronously

--Jgallimo 14:35, 30 October 2009 (UTC)