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NRAO Home > CASA > CASA Task Reference Manual |
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0.1.55 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 |
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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: |
|
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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 |
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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 |
|
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 => False.
async -- Run asynchronously
default = False; do not run asychronously
More information about CASA may be found at the
CASA web page
Copyright © 2016 Associated Universities Inc., Washington, D.C.
This code is available under the terms of the GNU General Public Lincense
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