ALMA WVR phase correction algorithms and software

WVRGCAL

Note

wvrgcal has been integrated into the standard NRAO CASA package. This is the recommended way to use it. See wvrgcal task in CASA. You can obtain CASA binaries at https://casa.nrao.edu/casa_obtaining.shtml and source code instructions at https://safe.nrao.edu/wiki/bin/view/Software/CasaRevisionControl

The following page is obsolete unless you need to go back to previous versions or need to do unusual custom development

wvrgcal is a command line front end to LibAIR (see below) and is the user-facing application for calculating atmospheric phase correction from WVR data. wvrgcal outputs a CASA gain calibration table which can then be applied to the observed data in the usual way.

There is a public email list which is the best place to ask questions about this program. Please note the list is archived so:

  1. Your messages will be publicly visible and indexed by search engines
  2. You are encouraged to search the archive before posting to check if your question has already been asked and answered

Download binary packages

Please note these binary packages are offered on an experimental basis, under the GPL license, with no warranty of any kind. By their nature, binary packages work only on a restricted class of systems similar to the ones they were built on. For some notes on installation see this message.

The binary packages are now built in both 32 and 64bit versions, but for the present time still for Linux only. The 32bit version have the string “x86” at the end of their name and the 64bit version has the string “x64” string at the end of their name. These strings unfortunately look quite similar to the eye, so be careful! (These are the standard platform names so that is why they are used)

WVRGCAL Version CASA Version Platform binary link source link
1.0 V3.2, r15198 x64 tar.gz file bnmin1, libair
1.0 V3.2, r15198 x86 tar.gz file bnmin1, libair
1.0 V3.3, r16856 x64 tar.gz file bnmin1, libair
1.0 V3.3, r16856 x86 tar.gz file bnmin1, libair

Download of older versions

  • Previous version, 64bit Linux, CASA revision 15111 (== CASA v3.2): wvrgcal-0.21.0.1 (Expected to work on RHEL 5.5, CentOS 5.5, Ubuntu 09.10+, Newer Fedora systems)
  • Previous version, 64bit Linux, CASA revision 13530 (== CASA v3.1): wvrgcal-0.21.0.1 (Expected to work on RHEL 5.5, CentOS 5.5, Ubuntu 09.10+, Newer Fedora systems)
  • Previous version, 64bit Linux, CASA revision 15111: wvrgcal-0.21 (Expected to work on RHEL 5.5, CentOS 5.5, Ubuntu 09.10+, Newer Fedora systems)
  • Previous version, 64bit Linux, CASA revision 13530: wvrgcal-0.21 (Expected to work on RHEL 5.5, CentOS 5.5, Ubuntu 09.10+, Newer Fedora systems)
  • Previous version, 64bit Linux, CASA revision 13530: wvrgcal-0.20.2 (Expected to work on RHEL 5.5, CentOS 5.5, Ubuntu 09.10+, Newer Fedora systems)
  • Previous version, 64bit Linux, CASA revision 13530: wvrgcal-0.20 (Expected to work on RHEL 5.5, CentOS 5.5, Ubuntu 09.10+, Newer Fedora systems)

User instruction

For instructions on use of this program see: http://wikis.alma.cl/bin/view/AIV/Application

Source code

The source code for the wvrgcal program is included in the packages below.

LibAIR

LibAIR is the atmospheric inference library that is the main core of the algorithms for phase correction of ALMA data using water vapour radiometers that we are developing in Cambridge. You can download, use and reuse the libAIR code under the LGPL license.

The library and algorithms are documented in the series of memo’s which are being posted at page on inference of coefficients for use in phase correction.

Downloads

Please consult Building libAIR for instructions on how to build the library. These are the available versions: