CATALOG Linedb

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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.