Abstract's details

On the accuracy of contemporary orbits of altimetry satellites in the radial direction

Sergei Rudenko (Deutsches Geodätisches Forschungsinstitut, Technische Universität München (DGFI-TUM), Germany)


Denise Dettmering (DGFI-TUM, Germany); Mathis Bloßfeld (DGFI-TUM, Germany); Julian Zeitlhöfler (DGFI-TUM, Germany); Riva Alkahal (DGFI-TUM, Germany)

Event: 2022 Ocean Surface Topography Science Team Meeting

Session: Precision Orbit Determination

Presentation type: Type Oral

Contribution: PDF file


Precise orbits of altimetry satellites are a basis for sea surface height estimation, since they provide the reference for the measured distance from a satellite altimeter to a water surface. Various factors affect accuracy of orbits of these satellites, such as type and quality of observations used, proper corrections of measurements, proper modelling of satellite shape, size, optical properties of its surfaces and its orientation in space, accurate modelling of forces acting on a satellite, accurate terrestrial and celestial reference frame realizations and transformation between them, proper modelling of displacements of tracking stations, a proper parameter adjustment algorithm, observation weighting and other factors. Significant progress has been reached in precise orbit determination of altimetry satellites in the latest decades by different orbit determination groups. In this presentation, we investigate the accuracy in the radial direction of contemporary orbits of such altimetry satellites as TOPEX/Poseidon, Jason-1, Jason-2, Jason-3, Sentinel-3A and some others derived in the ITRF2014 realization by various institutions using various types of observations covering totally time span from 1992 until 2021. We investigate single-satellite altimetry crossover differences, radial errors of individual orbit solutions and orbit differences in the radial direction between various orbit solutions for each satellite.

Oral presentation show times:

Room Start Date End Date
Sala Pasinetti Tue, Nov 01 2022,12:00 Tue, Nov 01 2022,12:15
Sergei Rudenko
Deutsches Geodätisches Forschungsinstitut, Technische Universität München (DGFI-TUM)