The CADMOS (Centre d'Aide au Développement des activités en Micro-pesanteur et des Opérations Spatiales) is a CNES (Centre National d'Etudes Spatiales) structure which helps user teams to prepare and develop experiments which require microgravity environment (Space Station, automatic spacecraft, Airbus-0g, ...). CADMOS groups together mission control, operation and exploitation centre functions.

The CADMOS centre was created in 1993 at CNES, in Toulouse, in order to support all French manned flights performed on-board MIR station or shuttle spacecraft. The expertise of CNES Space Station Utilisation division teams linked to CADMOS include PVH mission on-board Salyut-7 in 1982, 6 French-Russian missions on-board MIR station from 1982 to 1999, 51-G and LMS missions on-board US Shuttle in 1985 and 1996 and one French-Russian mission on-board the International Space Station in 2001. These missions are those for which CNES/CADMOS teams have been responsible for all aspects of preparation, realisation and certification of payloads and related scientific experiments realisation, together with the mission operations themselves.