Difference between revisions of "Updating the CASA Data Repository"

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(Created page with "CASA data repositories contain our current best knowledge of, e.g., observatory coordinates, leap seconds, ephemerides, calibrator models, etc. Every version of CASA contains ...")
 
(Improved text and fixed typos.)
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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.  
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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.  
  
Sometimes, however, one may want to manually update the data repository on an existing CASA version. From CASA version 4.4 and onward one can do this in two different ways (independent of the operating system):
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Some of this information, like leap seconds, can go out of date since at any time they can only be predicted for a certain time into the future.
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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):
  
 
1) On the CASA prompt, run
 
1) On the CASA prompt, run
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or
 
or
  
2) Without starting CASA< one can update the reporistory from the Unix promt, too:   
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2) Without starting CASA one can update the repository from the Unix prompt, too:   
  
  

Revision as of 04:49, 5 August 2015

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):

1) On the CASA prompt, run

# In CASA
!update-data

or

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


# in a terminal
casa-config --exec update-data


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