CATALOG /SORT

        [DISPLAY\]CATALOG InputCatalog /SORT OutputCatalog [Interval]

    Sort a InputCatalog in Astro format, and place the sorted result in  Output-
    Catalog,  in  Astro  CSV  format.  Duplicate entries are removed, as well as
    spectral lines from the same molecule separated by less  than  Interval  (in
    MHz)  if  specified.  The later facility allows to avoid handling separately
    hyperfine components of the same transition that are too close together.