François DIDELOT (CNES, FRANCE)

The DORIS mission began in 1992 with Topex Poseidon. Since then, the system has continuously improved in terms of on-board subsystems, ground segment, and data processing. In 2026, we are at the fourth generation of beacons deployed, as well as the fourth generation of on-board receivers. Ten DORIS receivers are currently in operation, and for some of them, this has been for more than 10 years without anomaly. The ground segment also demonstrates outstanding availability.
The DIODE navigator has also progressed, providing an orbit with radial accuracy of less than 5 cm and around 10 cm in 3D (compared to precise orbit POE). We are developing, in partnership with industry partners, the latest DGXX-S receiver for the highly anticipated European geodetic mission Genesis. This represents a real challenge, given the altitude of 6,000 km.
Today, we look forward to the next DORIS receiver. A first milestone has been reached this year, and we must continue to the next step. Maintaining and even improving the performance levels we have achieved will be a significant challenge, but one that is very exciting as we significantly advance receiving technology.
Keywords: DORIS, system, mission
Participation: In person