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Precise orbits of altimetry satellites ERS-1, ERS-2 and TOPEX/Poseidon

Sergei Rudenko(1) , Tilo Schoene(1) , and Jean-Claude Raimondo(2)

(1) GeoForschungsZentrum Potsdam (GFZ), Telegrafenberg A 17, D-14473 Potsdam, Germany
(2) TeleOrbit, Baiernrainer Weg 6, D-83623 Dietramszell-Linden, Germany


Studies of sea level changes can profit by using orbits of altimetry satellites derived in the same, well defined reference frame for all satellites and using the same, most precise models for satellite perturbations. Precise orbits of altimetry satellites ERS-1, ERS-2 and TOPEX/Poseidon have been derived in the ITRF2000 reference frame using recent EIGEN-GRACE geopotential, ocean tide and other models. The orbits are based on the use of SLR, PRARE, DORIS and altimetry crossover data for the respective satellites and cover the entire time period from 1991 till 2005. The quality of the orbits is illustrated using the results of single crossover analysis. In particular, the paper shows improvements in the quality of the satellite orbits derived using the recently developed EIGEN-GRACE geopotential models compared to previous orbit determinations.


Full paper

Workshop poster


                 Last modified: 07.10.03