The AUSGeoid98 geoid model of Australia: data treatment, computations and comparisons with GPS-levelling data

W.E. Featherstone, J.F. Kirby, A.H.W. Kearsley, J.R. Gilliland, G.M. Johnston, J. Steed, René Forsberg, M.G. Sideris

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The AUSGeoid98 gravimetric geoid model of Australia has been computed using data from the EGM96 global geopotential model, the 1996 release of the Australian gravity database, a nationwide digital elevation model, and satellite altimeter-derived marine gravity anomalies. The geoid heights are on a 2 by 2 arcminute grid with respect to the GRS80 ellipsoid, and residual geoid heights were computed using the I-D fast Fourier transform technique. This has been adapted to include a deterministically modified kernel over a spherical cap of limited spatial extent in the generalised Stokes scheme. Comparisons of AUSGeoid98 with GPS and Australian Height Datum (AHD) heights across the continent give an RMS agreement of +/-0.364 m, although this apparently large value is attributed partly to distortions in the AHD.
Original languageEnglish
JournalJournal of Geodesy
Volume75
Issue number5-6
Pages (from-to)313-330
ISSN0949-7714
Publication statusPublished - 2001

Keywords

  • modified kernels
  • practical geoid computation
  • gravity data processing
  • Australia

Cite this

Featherstone, W. E., Kirby, J. F., Kearsley, A. H. W., Gilliland, J. R., Johnston, G. M., Steed, J., Forsberg, R., & Sideris, M. G. (2001). The AUSGeoid98 geoid model of Australia: data treatment, computations and comparisons with GPS-levelling data. Journal of Geodesy, 75(5-6), 313-330.