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.