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0.1.54 importvla

Requires:

Synopsis
Import VLA archive file(s) to a measurement set

Description

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.

Arguments





Inputs

archivefiles

Name of input VLA archive file(s)

allowed:

stringArray

Default:

vis

Name of output visibility file

allowed:

string

Default:

bandname

VLA frequency band name:”=>obtain all bands in the archive file

allowed:

string

Default:

frequencytol

Hz

Frequency shift to define a unique spectra window (Hz)

allowed:

doubleHz

Default:

150000.0

project

Project name: ” => all projects in files

allowed:

string

Default:

starttime

start time to search for data

allowed:

string

Default:

stoptime

end time to search for data

allowed:

string

Default:

applytsys

apply nominal sensistivity scaling to data and weights

allowed:

bool

Default:

True

autocorr

import autocorrelations to ms, if set to True

allowed:

bool

Default:

False

antnamescheme

’old’ or ’new’; ’VA04’ or ’04’ for VLA ant 4

allowed:

string

Default:

new

keepblanks

Fill scans with blank (empty) source names (e.g. tipping scans)

allowed:

bool

Default:

False

evlabands

Use updated eVLA frequencies and bandwidths for bands and wavelengths

allowed:

bool

Default:

False

Example

 
 
      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  


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