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.