View source for Updating the CASA Data Repository

CASA data repositories contain our current best knowledge of, e.g., observatory coordinates, leap seconds, ephemerides, calibrator models, etc. Every version of CASA contains the latest files as they are available at the time of the release. 

Some of this information, like leap seconds, can go out of date since at any time they can only be predicted for a certain time into the future.
Also, we only store ephemerides up to a certain future date at release time. Finally, for models etc., an improved version may become available after the release.

So, one may need to manually update the data repository on an existing CASA version if the version is used on data which was taken much later than the CASA release date. From CASA version 4.4 and onwards, one can do this in two different ways (independent of the operating system).  But first, be sure you are not close to your disk quota in your home area, because it will give a failure message if you hit it during the update, because it will try to write to the file: ~/.casa/ipython/history.sqlite.

1) On the CASA prompt, run

<source lang="python">
# In CASA
!update-data
</source>

or

2) Without starting CASA one can update the repository from the Unix prompt, too:  


<source lang='bash'>
# in a terminal
casa-config --exec update-data
</source>


either command will pull the current data repository from the NRAO database and update it on disk.



----

'''CASA 4.4 or earlier:''' 

We changed the data server and the above command will not work anymore in the distribution. However, we have a [[https://svn.cv.nrao.edu/casa/distro/patches/update-rsync-url/update-data.patch patch]] available that can be run by 

<source lang='bash'>
    $ update-data.patch <PATH-TO-CASA-DISTRIBUTION>
</source>

where <PATH-TO-CASA-DISTRIBUTION> is the path to the top level of the unpacked CASA distribution.