next up previous contents index
Next: CATALOG LINEDB%ENERGY Up: CATALOG Previous: CATALOG Astro   Contents   Index


CATALOG Linedb

        The LINEDB catalog format is a more flexible facility, which can al-
    so  holds  additional  information.  On-line spectral databases (JPL and
    CDMS) are directly useable as LINEDB catalogs, although  access  can  be
    long in this case.

    Scripts  named  gag_data:*-linedb.sic are availables as examples to con-
    struct local data bases from the on-line ones. Beware that  the  on-line
    databases sometimes change their naming conventions, so that identifying
    a given species by name can be tricky.

    In 2020, access to CDMS was unreliable. It has improved  since.   Access
    to JPL is operational, but frequencies are not as up-to-date as in CDMS.

    Local  files  in  the JPL ".cat" format can be used, but as of Jan-2020,
    the Einstein coefficients are wrong. They also require a  "partfunc.cat"
    in the following format (given here for HN-15-C as an example)
    species HN-15-C 28006
    temperatures 300. 225. 150. 75. 37.5 18.75 9.375
    qpart 141.06 105.9 70.797 35.514 17.23 9.135 4.746
    The tag number (28006 here) must match that of the ".cat" file.


Gildas manager 2023-06-01