Since the release of the 2020 realization of the ITRF2020, the Analysis Centers of the International DORIS Service (IDS) have been engaged in several efforts to improve the processing of the DORIS observations obtained since mid-2011. These efforts include (i) improving the orbit and measurement modelling (atmospheric loading effects, satellite surface force modeling...) (ii) reviewing the mitigation strategies of the South Atlantic Anomaly effects on the onboard DORIS Ultra Stable Oscillators (USO’s) (iii) individually analyzing the DORIS satellite contributions to geocenter and scale, and (iv) assessing the impact of the latest DORIS satellites on the IDS products.

Among the studies on the SAA mitigation strategies, the IDS will take advantage of the connection of the GPS/GNSS and DORIS receivers to the same USO on Sentinel-3A/3B/6A to correct the clock of the DORIS observations.

The primary objective of this study is to present the major DORIS processing evolutions and their impact on the origin, scale, station positioning and EOPs. The second purpose is to introduce ongoing and future activities related to the DORIS contribution to the ESA Genesis mission which may enhance the IDS contribution to the next ITRF realization.