FAT is now surpassed by pyFAT (https://github.com/PeterKamphuis/pyFAT-astro) a much more flexible and hopefully more accurate version of the code. The IDL/GDL wrapper is merely retained for historical purposes. FAT is an IDL/GDL wrapper to automate TiRiFiC
After downloading and installation fat can now be run with FAT, /installation_check and that will perform a small check on NGC 2903 from the WHISP database.
Create a test set that people can use to check wether FAT is working after installation.