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dc.contributor.authorStewart, Michael
dc.contributor.authorFeatherstone, Will
dc.contributor.authorKirby, Jonathan
dc.identifier.citationStewart, Michael and Featherstone, Will and Kirby, Jonathan. 1998. Comparison of geosat and gravimetric geoid profiles in the North Sea. Marine Geodesy. 21(4): pp. 319-330.

Sea surface height profiles derived from 2-year, repeat track, Geosat altimeter data have been compared with a regional gravimetric geoid in the western North Sea, computed using a geopotential model and terrestrial gravity data. The comparison encompasses 18 Geosat profiles covering a 750x850 km area of the North Sea. After a second-order polynomial was used to model the long-wavelength differences which cannot be clearly separated over an area of this size, results show agreement to better than +/-3 cm for wavelengths between approximately 20 and 750 km. In regions where terrestrial gravity data were not available to improve the geoid, similar comparisons with the OSU91A geopotential model alone show differences of up to +/-6 cm. This illustrates the importance of incorporating local gravity data in regional geoid computations, and partly validates the regional gravimetric geoid solution and Geosat sea surface profiles in the western North Sea. It is concluded that, in marine areas where the sea surface topography is known to be small in magnitude, Geosat sea surface profiles can act as an independent control on gravimetric geoids in the medium-wavelength range.

dc.publisherTaylor and Francis
dc.subjectmedium wavelength verification
dc.subjectsea surface height
dc.subjectNorth Sea
dc.subjectgravimetric geoid
dc.titleComparison of geosat and gravimetric geoid profiles in the North Sea
dc.typeJournal Article
dcterms.source.titleMarine Geodesy
curtin.accessStatusFulltext not available
curtin.facultyDepartment of Spatial Sciences
curtin.facultyFaculty of Science and Engineering
curtin.facultyThe Western Australian School of Mines

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