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Absolute Calibration of the TOPEX/POSEIDON Altimeters using UK Tide Gauges, GPS, and Precise, Local Geoid-Differences

Lookup NU author(s): Professor Philip Moore


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This article describes an absolute calibration of TOPEX/Poseidon (T/P) altimeter bias using UK tide gauges equipped with Global Positioning System (GPS) receivers. The method is an extension of earlier work using the Newhaven tide gauge in the English Channel. However, the present analysis extends the research to a number of gauges around the UK and incorporates several improvements. The time-averaged TOPEX and Poseidon biases are obtained with a precision of approximately 2 and 3 cm, respectively. The research complements work on bias determination by other groups in the T/P Science Working Team and can, in principle, be applied at other locations for which precise, local geoid-differences are available. The relatively sparse Poseidon data set has been used as a test of our ability to perform an absolute calibration of upcoming Jason-1 altimetry as soon as possible after launch.

Publication metadata

Author(s): Dong X, Woodworth P, Moore P, Bingley R

Publication type: Article

Publication status: Published

Journal: Marine Geodesy

Year: 2002

Volume: 25

Issue: 3

Pages: 189-204

ISSN (print): 0149-0419

ISSN (electronic): 1521-060X

Publisher: Taylor & Francis Inc.


DOI: 10.1080/01490410290051527


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