CASA task to invert gain solutions in a caltable
Switch branches/tags
Nothing to show
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.


CASA task to invert solutions in a gain calibration table.

The application in mind is direction-dependent calibration, e.g. for peeling.

Latest version: 1.3 (download here)

Tested with: CASA Version 4.7.0

invgain is released under a BSD 3-Clause License (open source, commercially useable); refer to LICENSE for details.

Feedback regarding invgain is always welcome.


Download the latest version of the source files from here.

Place the source files into a directory containing your measurement set. Without changing directories, open CASA and type


then exit CASA. A number of files should have been produced, including Reopen CASA and type


To see the parameter listing, type

inp invgain

For more details on how invgain works, type

help invgain

Now set some parameters and press go!

For a more permanent installation, place the source files into a dedicated invgain code directory and perform the steps above. Then go to the hidden directory .casa which resides in your home directory and create a file called In this file, put the line


invgain will now be available when you open a fresh terminal and start CASA within any directory.

Acknowledging use of invgain

invgain is provided in the hope that it (or elements of its code) will be useful for your work. If you find that it is, I would appreciate your acknowledgement by citing DOI as follows (note the AAS guidelines for citing software):

Hales, C. A. 2016, invgain, v1.3, doi:10.5281/zenodo.163000, as developed on GitHub