What could be the IDS contribution to the next ITRF2020

Since the delivery of the ITRF2014, the IDS (International DORIS Service) Combination Center (CC) has completed different studies to improve the quality of the DORIS contribution to the next ITRF realization. These studies can be split into two categories depending on whether they concern the IDS CC itself or the IDS Analysis Centers.

Compared to the DORIS contribution to the ITRF2008, the IDS-combined solution, delivered for the ITRF2014, showed a slight degradation in terms of both station positioning and Earth orientation parameters from 1993.0 to 2002.0. Afterwards, the IDS CC completed a new weekly combined solution using a new preprocessing of the multi-satellite solutions from the six IDS ACs. The presentation will demonstrate that the new parameterization performs as well as the IDS contribution to the ITRF2008 for the time period 1993.0-2002.0 without any degradation for the most recent time period.

Then, the IDS CC will show how it plans to validate the implementation at the AC level the correction of the perturbations due to radiation exposure on DORIS Ultra Stable Oscilators due to the South Atlantic Anomaly on the DORIS data and what are the effects on the station coordinate time series. Finally, the IDS CC will present some new on-line tools related to the IDS CC products.