Show simple item record

dc.contributor.authorFeatherstone, Will
dc.identifier.citationFeatherstone, William. 2008. GNSS-based heighting in Australia: current, emerging and future issues. Journal of Spatial Science. 53 (2): pp. 115-133.

Ellipsoidal heights, i.e., w.r.t. a geometrical Earth figure, determined from Global Navigation Satellite Systems (GNSS) are inherently their least accurate coordinate, due mainly to satellite geometry and atmospheric refraction. For most practical purposes, however, these GNSS-derived ellipsoidal heights have to be transformed to heights that relate to the Earth’s gravity field, which generally adds further uncertainty. The reduction in accuracy of the transformed height is due to errors in gravimetric quasi/geoid models, but this is compounded yet further in Australia and elsewhere because of the imperfect realisation of local vertical datums. This paper comments upon current, emerging and future issues with height determination on the Australian Height Datum (AHD) using GNSS. This comprises the reference frame used for GNSS ellipsoidal heights, theory- and data-driven inaccuracies in modelling the quasi/geoid, and deficiencies in the realisation of the AHD. While some of these issues will be redressed, in part, by the production of AUSGeoid2008 that is fitted to the AHD, there will always be the need to routinely apply checks on GNSS-derived heights in Australia, and elsewhere.

dc.publisherSpatial Sciences Institute, Australia
dc.subjectKeywords: Heights
dc.subjectvertical datum
dc.titleGNSS-based heighting in Australia: current, emerging and future issues
dc.typeJournal Article
dcterms.source.titleJournal of Spatial Science

The Version of Record of this manuscript has been published and is available in Journal of Spatial Science, 2010.

curtin.accessStatusOpen access
curtin.facultyDepartment of Spatial Sciences
curtin.facultyThe Western Australian School of Mines
curtin.facultyScience and Engineering

Files in this item


This item appears in the following Collection(s)

Show simple item record