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Cross-calibration of TOPEX/Poseidon, ERS-2 and GEOSAT altimetry

Lookup NU author(s): Professor Philip Moore


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Long-term monitoring of the NASA (TOPEX) altimeter bias drift onboard TOPEX/Poseidon has been undertaken by comparison against in-situ tide gauge data and used as a benchmark for cross-calibration of the concurrent altimeter mission ERS-2 and of the earlier GEOSAT mission. Dual crossovers between ERS-2 and TOPEX/Poseidon provide a measure of the relative bias along with other parameters defining differences between the altimetric data sets. Attempts to link GEOSAT with the mission in the 1990s have relied on tide gauge time series with the assumption that geographically correlated errors in GEOSAT have zero effect. In this study we utilise GEOSAT crossovers and tide gauge enhanced altimetry between TOPEX/Poseidon and GEOSAT to estimate a 1 cy/rev correction simultaneously with the relative altimeter bias. Evidence of improvement is shown by comparison of the GEOSAT altimetry against the EGM96 mean sea-level. © 2002 COSPAR. Published by Elsevier Science Ltd. All rights reserved.

Publication metadata

Author(s): Moore P, Sterlini PE

Publication type: Article

Publication status: Published

Journal: Advances in Space Research

Year: 2002

Volume: 30

Issue: 2

Pages: 233-239

ISSN (print): 0273-1177

ISSN (electronic):

Publisher: Pergamon


DOI: 10.1016/S0273-1177(02)00290-9


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