Abstract's details
IGN-IPGP/JPL AC Status
Event: 2026 IDS Workshop
Session: Analysis Center Status and Progress
Presentation type: Oral
We will present the latest results from the IGN-IPGP/JPL Analysis Center, with emphasis on the one-year reprocessing carried out for the ITRF2020u2025 update. These results include the latest evaluation by the IDS Combination Center, together with analyses highlighting the impact of incorporating SWOT observations into the DORIS solutions.
A first test of length-of-day (LOD) estimation over a three-month interval will also be presented. Several processing strategies have been investigated, and the resulting LOD series will be compared with the IERS C04 Earth orientation parameter series.
We will further present the first results of an observation-level multi-satellite combination. In this approach, frequency bias estimation is separated between satellites and stations through distinct parameterizations implemented in the GipsyX Kalman filter, with parameters evolving according to different random-walk models. This strategy is combined with a more realistic treatment of the troposphere and replaces the former approach in which one tropospheric parameter and one frequency bias were estimated for each pass and satellite. The impact of this revised parameterization on DORIS-derived products will be discussed.
Finally, we will briefly introduce the newly established IDS Working Group on Tropospheric Products. We will outline its initial focus on DORIS-derived zenith wet delay (ZWD) estimates and its main objectives, including the coordinated documentation, comparison, and assessment of contributed products across participating Analysis Centers.
Back to the list of abstractA first test of length-of-day (LOD) estimation over a three-month interval will also be presented. Several processing strategies have been investigated, and the resulting LOD series will be compared with the IERS C04 Earth orientation parameter series.
We will further present the first results of an observation-level multi-satellite combination. In this approach, frequency bias estimation is separated between satellites and stations through distinct parameterizations implemented in the GipsyX Kalman filter, with parameters evolving according to different random-walk models. This strategy is combined with a more realistic treatment of the troposphere and replaces the former approach in which one tropospheric parameter and one frequency bias were estimated for each pass and satellite. The impact of this revised parameterization on DORIS-derived products will be discussed.
Finally, we will briefly introduce the newly established IDS Working Group on Tropospheric Products. We will outline its initial focus on DORIS-derived zenith wet delay (ZWD) estimates and its main objectives, including the coordinated documentation, comparison, and assessment of contributed products across participating Analysis Centers.