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

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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 arc-minute grid with respect to the GRS80 ellipsoid, and residual geoid heights were computed using the 1-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.

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Authors and Affiliations

  1. Department of Spatial Sciences, Curtin University of Technology, GPO Box U1987, Perth, WA 6845, Australia e-mail: W.featherstone@curtin.edu.au; Tel.: +61-8-9266-2734; Fax: +61-8-9266-2703, , , , , , AU

    W. E. Featherstone & J. F. Kirby

  2. School of Geomatic Engineering, The University of New South Wales, Sydney, NSW 2052, Australia, , , , , , AU

    A. H. W. Kearsley

  3. School of Geoinformatics, Planning & Building, University of South Australia, North Terrace, Adelaide, SA 5000, Australia, , , , , , AU

    J. R. Gilliland

  4. Geodesy Section, Australian Surveying and Land Information Group, PO Box 2, Belconnen, ACT 2616, Australia, , , , , , AU

    G. M. Johnston & J. Steed

  5. Geodynamics Department, Kort og Matrikelstyrelsen, Rentermestervej 8, 400 Copenhagen, Denmark, , , , , , DK

    R. Forsberg

  6. Department of Geomatics Engineering, The University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada, , , , , , CA

    M. G. Sideris

Authors
  1. W. E. Featherstone
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  2. J. F. Kirby
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  3. A. H. W. Kearsley
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  4. J. R. Gilliland
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  5. G. M. Johnston
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  6. J. Steed
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  7. R. Forsberg
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  8. M. G. Sideris
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Received: 10 March 2000 / Accepted: 21 February 2001

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Featherstone, W., Kirby, J., Kearsley, A. et al. The AUSGeoid98 geoid model of Australia: data treatment, computations and comparisons with GPS-levelling data. Journal of Geodesy 75, 313–330 (2001). https://doi.org/10.1007/s001900100177

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  • DOI: https://doi.org/10.1007/s001900100177

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