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TOPEX/Poseidon and Jason-1: Absolute Calibration in Bass Strait, Australia


Watson, CS and White, NJ and Coleman, R and Church, JA and Morgan, P and Govind, R, TOPEX/Poseidon and Jason-1: Absolute Calibration in Bass Strait, Australia, Marine Geodesy, 27, (1-2) pp. 107-131. ISSN 0149-0419 (2004) [Refereed Article]

DOI: doi:10.1080/01490410490465373


Updated absolute calibration results from Bass Strait, Australia, are presented for the TOPEX/Poseidon (T/P) and Jason-1 altimeter missions. Data from an oceanographic mooring array and coastal tide gauge have been used in addition to the previously described episodic GPS buoy deployments. The results represent a significant improvement in absolute bias estimates for the Bass Strait site. The extended methodology has allowed comparison between the altimeter and in situ data on a cycle-by-cycle basis over the duration of the dedicated calibration phase (formation flight period) of the Jason-1 mission. In addition, it has allowed absolute bias results to be extended to include all cycles since the T/P launch, and all Jason-1 data up to cycle 60. Updated estimates and formal 1-sigma uncertainties of the absolute bias computed throughout the formation flight period are 0 ± 14 mm for T/P and +152 ± 13 mm for Jason-1 (for the GDR POE orbits). When JPL GPS orbits are used for cycles 1 to 60, the Jason-1 bias estimate is 131 mm, virtually identical to the NASA estimate from the Harvest Platform off California calculated with the GPS orbits and not significantly different to the CNES estimate from Corsica. The inference of geographically correlated errors in the GDR POE orbits (estimated to be approximately 17 mm at Bass Strait) highlights the importance of maintaining globally distributed verification sites and makes it clear that further work is required to improve our understanding of the Jason-1 instrument and algorithm behavior. © Taylor and Francis Inc.

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:White, NJ (Mr White)
UTAS Author:Coleman, R (Professor Richard Coleman)
UTAS Author:Church, JA (Dr John Church)
ID Code:30139
Year Published:2004
Web of Science® Times Cited:33
Deposited By:Geography and Environmental Studies
Deposited On:2004-08-01
Last Modified:2009-08-24

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