This documentation describes the algorithmic and technical aspects
of the configuration 801 of ARPEGE/IFS, which allows in particular
to do sensitivity studies. An example of namelist is provided.

Cette documentation décrit les algorithmes et les aspects techniques
de la configuration 801 d’ARPEGE/IFS, qui permet en particulier de faire
des études de sensibilité. On fournit un exemple de namelist.

• Introduction and purpose.
• Algorithm of this configuration.
• The sequences of STEPO called.
• Organigramme.
• List of useful variables.
• Example of namelist.
• References and internal notes.