From FITS to CLASS

   FITS READ Filename[.fits]

will read a FITS file and create CLASS data from it. It is expected to work under the following conditions:

1. The Filename.fits file contains one spectrum, with (a subset of) the FITS keywords which are described in the previous section. FITS Keyword redefinition is possible.
2. OR The Filename.fits contains a BINTABLE, also with recognized FITS keywords.
3. No more, no less

This may look akwardly restrictive, but is already powerful if you have thought about your data destination when creating the FITS file.