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dc.contributor.authorFeatherstone, Will
dc.contributor.authorAlexander, K.
dc.contributor.authorSideris, M.
dc.date.accessioned2017-01-30T12:01:24Z
dc.date.available2017-01-30T12:01:24Z
dc.date.created2010-10-04T20:02:52Z
dc.date.issued1996
dc.identifier.citationFeatherstone, Will and Alexander, Ken and Sideris, Michael. 1996. Gravimetric geoid refinement using high resolution gravity and terrain data. Geomatics Research Australasia. 64: pp. 75-99.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/17359
dc.description.abstract

In regions where additional, spatially dense gravity and terrain information are available to augment existing data, a gravimetric determination of the geoid can be improved by incorporating these new data. In this study, 4,016 additional gravity observations, measured on a near-regular 2km by 3km grid in Western Australia have been used to compute a gravimetric geoid model using fast Fourier transform (FFT) techniques. A digital terrain model is also used during the geoid computations, which is derived from gravity station elevations and spot heights in the area. Using 21 spirit-levelled Australian Height Datum (AHD) heights in conjunction with Global Positioning System (GPS) ellipsoidal heights as control data, the standard deviation of the new gravimetric geoid is ±0.0824m. This represents a 31% improvement over the existing AUSGEOID93 gravimetric geoid and a 48% improvement over the OSU91A global geopotential model. Of these improvements, approximately 10% is due to the additional gravity data and approximately 1% is due to the terrain effects; the remainder is due to the dense gridding of the data prior to the FFT computations.

dc.publisherInstitution of Surveyors, Australia
dc.subjectAustralia
dc.subjectGeoid
dc.titleGravimetric geoid refinement using high resolution gravity and terrain data
dc.typeJournal Article
dcterms.source.volume64
dcterms.source.startPage75
dcterms.source.endPage99
dcterms.source.issn13249983
dcterms.source.titleGeomatics Research Australasia
curtin.note

Geomantics Research Australasia has been succeeded by Journal of Spatial Science.

curtin.accessStatusOpen access
curtin.facultyDepartment of Spatial Sciences
curtin.facultyFaculty of Science and Engineering
curtin.facultyWA School of Mines


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