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Absolute Calibration of TOPEX/Poseidon and Jason-1 Using GPS Buoys in Bass Strait, Australia


Watson, CS and Coleman, R and White, N and Church, J and Govind, R, Absolute Calibration of TOPEX/Poseidon and Jason-1 Using GPS Buoys in Bass Strait, Australia, Marine Geodesy, 26, (3-4) pp. 285-304. ISSN 0149-0419 (2003) [Refereed Article]

DOI: doi:10.1080/714044522


An absolute calibration of the TOPEX/Poseidon (T/P) and Jason-1 altimeters has been undertaken during the dedicated calibration phase of the Jason-1 mission, in Bass Strait, Australia. The present study incorporates several improvements to the earlier calibration methodology used for Bass Strait, namely the use of GPS buoys and the determination of absolute bias in a purely geometrical sense, without the necessity of estimating a marine geoid. This article focuses on technical issues surrounding the GPS buoy methodology for use in altimeter calibration studies. We present absolute bias estimates computed solely from the GPS buoy deployments and derive formal uncertainty estimates for bias calculation from a single overflight at the 40-45 mm level. Estimates of the absolute bias derived from the GPS buoys is -10 ± 19 mm for T/P and + 147 ± 21 mm for Jason-1 (MOE orbit) and + 131 ± 21 mm for Jason-1 (GPS orbit). Considering the estimated error budget, our bias values are equivalent to other determinations from the dedicated NASA and CNES calibration sites.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geophysics
Research Field:Geodesy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Watson, CS (Dr Christopher Watson)
UTAS Author:Coleman, R (Professor Richard Coleman)
ID Code:27865
Year Published:2003
Web of Science® Times Cited:42
Deposited By:Geography and Environmental Studies
Deposited On:2003-08-01
Last Modified:2009-08-24

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