Calibration of TOPEX/Poseidon and Jason Altimeter Data to Construct a Continuous Record of Mean Sea Level Change |
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| Authors: | Eric W Leuliette R Steven Nerem Gary T Mitchum |
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| Institution: |
a Colorado Center for Astrodynamics Research University of Colorado at Boulder, Boulder, Colorado, USA
b College of Marine Science University of South Florida, St. Petersburg, Florida, USA |
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| Abstract: | Jason, the successor to the TOPEX/POSEIDON (T/P) mission, has been designed to continue seamlessly the decade-long altimetric sea level record initiated by T/P. Intersatellite calibration has determined the relative bias to an accuracy of 1.6 mm rms. Tide gauge calibration of the T/P record during its original mission shows a drift of -0.1 ± 0.4 mm/year. The tide gauge calibration of 20 months of nominal Jason data indicates a drift of -5.7 ± 1.0 mm/year, which may be attributable to errors in the orbit ephemeris and the Jason Microwave Radiometer. The analysis of T/P and Jason altimeter data over the past decade has resulted in a determination of global mean sea level change of +2.8 ± 0.4 mm/year. |
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| Keywords: | Jason TOPEX/POSEIDON calibration verification sea level |
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