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dc.contributor.authorFeatherstone, Will
dc.contributor.authorMorgan, L.
dc.date.accessioned2017-01-30T12:11:10Z
dc.date.available2017-01-30T12:11:10Z
dc.date.created2010-03-29T20:05:03Z
dc.date.issued2007
dc.identifier.citationFeatherstone, Will and Morgan, L. 2007. Validation of the AUSGeoid98 model in Western Australia using historic astrogeodetically observed deviations of the vertical. Journal of the Royal Society of Western Australia 90 (3): pp. 143-149.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/18984
dc.description.abstract

AUSGeoid98 is the national standard quasigeoid model of Australia, which is accompanied by a grid of vertical deviations (angular differences between the Earth's gravity vector and the surface-normal to the reference ellipsoid). Conventionally, co-located Global Positioning System (GPS) and spirit-levelling data have been used to assess the precision of quasigeoid models. Here, we instead use a totally independent set of 435 vertical deviations, observed at astrogeodetic stations across Western Australia before 1966, to assess the AUSGeoid98 gravimetrically modelled vertical deviations. This point-wise comparison shows that (after three-sigma rejection of 15 outliers) AUSGeoid98 can deliver vertical deviations with a precision (standard deviation) of around one arc-second, which is generally adequate for the reduction of current terrestrial-geodetic survey data in this State.

dc.publisherRoyal Society of Western Australia
dc.subjectvertical deviations
dc.subjectgeodetic astronomy
dc.subjectgeodetic surveying
dc.subjectquasigeoid
dc.subjectgeodesy
dc.titleValidation of the AUSGeoid98 model in Western Australia using historic astrogeodetically observed deviations of the vertical
dc.typeJournal Article
dcterms.source.volume90
dcterms.source.number3
dcterms.source.startPage143
dcterms.source.endPage149
dcterms.source.issn0035-922X
dcterms.source.titleJournal of the Royal Society of Western Australia
curtin.accessStatusOpen access
curtin.facultyDepartment of Spatial Sciences
curtin.facultyFaculty of Science and Engineering
curtin.facultyWA School of Mines


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