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====== AIPS at Sterrewacht Leiden ======
The introduction course to astronomical software contains a [[https://local.strw.leidenuniv.nl/local/practicum/html/aips.php| chapter on AIPS]]

===== AIPS versions =====
Our installation usually has the current development version of aips (31DECyy with yy the last two digets of the current year) as ''TST'' version, the stable release (last year's version) as ''NEW'' and the version from before that time as ''OLD''.

===== AIPS startup =====

AIPS can be started by running the command ''aips''. There is a small deviation from a standard AIPS setup here:
  * If environment variable ''$FITS'' is set, its value is preserved, in stead of pointing to a location in ''$AIPS_ROOT'' (which would then need to be writeable by all users).
  * All computers have a local directory ''/data1/DA00'' and the variable ''$DA00'' is made to point there.\\
So please be aware that if you bypass our startup script to call ''STARTAIPS.SH'' directly, you will loose this setup, and all tasks will run very slow, because all ''DA00'' files will live on a disk on a central server.

===== AIPS data areas =====

Users should also have a file ''.dadevs'' listing their personal data areas. We have a script called ''aipsdisk-setup'' that can create such a file, by default using all local disks. See aips help ([[http://www.aips.nrao.edu/cgi-bin/ZXHLP2.PL?AIPS]]) for details about the .dadevs file and other methods to specify where your data lives.

===== AIPS number =====
Since all data resides in your own directories, the aips number asked at startup is something you can choose yourself. You don't have to coordinate your user number with others or with system management. Note that number 0 is special, used by aips startup and some internal tasks.

===== Running AIPS in a virtual desktop session =====
When running aips in a virtual desktop such as a VNC session (or X2GO, RDP or OpenOnDemand), special care has to be taken to get the TV server and message server to display locally. In this case, start aips using:
  aips TV=local
(basically, this prevents aips guessing the computer you logged in to, and trying to connect back to that machine to start the tv (and tek) servers there (which will fail).

==== See also ====

See also: [[http://www.aips.nrao.edu/cook.html]] for more general information on the AIPS software.

In addition to the main AIPS software, we also offer [[ParselTongue]]
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