The LFI library is used to manipulate direct-access model files at Météo-France. It is currently used for the native files of Arpège, Aladin and Méso-NH models, and for Arpège/Aladin ancillary files (climatologies, postprocessing, Aladin coupling). Arpège/Aladin use an overlayer of LFI called the FA (Fichier Arpège) interface.

See the internal structure of FA and LFI files.

More documentation on LFI and FA files.