CoAuthors

Douglas S. Chinn (SGT Inc, U.S.A.); Nikita P. Zelensky (SGT Inc., U.S.A.); Jennifer W. Beall (Emergent Space Technologies, U.S.A.); Brian D. Beckley (SGT Inc, U.S.A.)

The altimeter satellites Envisat, Cryosat-2, SARAL, and HY-2A along with Jason-1, and Jason-2 contribute in a direct manner to the DORIS reference frame, serving as members of the DORIS satellite constellation. In the context of ITRF2013, GSC has recomputed the orbits for these altimeter satellites using updated Precision Orbit Determination (POD) standards. The new orbit standards follow closely those applied to Jason-1, and Jason-2, with respect to the time-variable gravity modeling, and the improvements in DORIS ground antenna phase center corrections. As a matter of routine we inter-compare the DORIS-only and SLR+DORIS orbits for these satellites, prior to submission of the weekly SINEX solutions. We report on the quality of these altimeter satellite orbits using the computations for the gscwd25 and gscwd26 SINEX series as a reference.