CoAuthors

Nikita Zelensky (SGT Inc, U.S.A.); Alexandre Belli (NPP/USRA @ NASA GSFC, U.S.A.); Douglas Chinn (SGT Inc., U.S.A.); Despina Pavlis (ESSIC @ University of Maryland/College Park, U.S.A.); Taylor Thomas (Emergent Space Technologies, U.S.A.)

The processing for ITRF2014 marked a major milestone for the International DORIS Service (IDS). The IDS Contribution to ITRF2014, and the constituent analysis center solutions processed more than twenty years of data to ten satellites and implemented numerous modeling improvements compared to the previous delivery for ITRF2008 (Moreaux et al., 2016). Nonetheless, the analysis of the IDS combination as well as the individual Analysis Center (AC) time series revealed the presence of systematic error signals in the geodetic products (station time series and Earth Orientation parameters [EOP]) as well in the weekly reference frame parameters (geocenter and scale).

In this paper we summarize the current efforts to improve the DORIS processing with the objective of improving the quality of DORIS products. We concentrate on three topics in this presentation: (1) the use of improved models of the DORIS USO for Jason-2 derived from analysis of Jason-2/T2L2 data; (2) Testing of improved models for Tidal EOP as recommended by the special working group of the IERS; (3) Addition of Sentinel-3A as an operational satellite in the GSC operational combination. We provide a summary of the status of the current operational series, and evaluate prospects for further improvements