| The activities of the GAP team are also related to the official ephemerides work of IMCCE and to teaching and training. |
| Global networks of tracking stations produce the observations that make generation of the precise ephemerides possible. |
| Usually used by the sailors to take stock at sea, these ephemerides are compulsory for navigation of the high seas. |
| The data related to the ephemerides are official data of the Ministère de l'Éducation Nationale. |
| Besides its missions of ephemerides computation, an intense research activity was developed in the dynamical and celestial mechanic fields. |
| In 1802 the Service of Calculations was founded and was in charge of the ephemerides computation. |
