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    Experiments with two different approaches to gridding terrestrial gravity anomalies and their effect on regional geoid computation

    18927_downloaded_stream_19.pdf (4.804Mb)
    Access Status
    Open access
    Authors
    Featherstone, Will
    Goos, Joris
    Kirby, Jon
    Holmes, S.
    Date
    2003
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Goos, J.M. and Featherstone, W.E. and Kirby, J.F. and Holmes, S.A. 2003. Experiments with two different approaches to gridding terrestrial gravity anomalies and their effect on regional geoid computation. Survey Review 37 (288): 92-112.
    Source Title
    Survey Review
    Additional URLs
    http://www.surveyreview.org
    Faculty
    Division of Resources and Environment
    Department of Spatial Sciences
    Remarks

    Article first published in Survey Review 2001 37(288)pp. 92-112. Survey Review ISSN 0039-6265 is published by Commonwealth Association for Surveying and Land Economy (CASLE) in the UK.

    A link to the Survey Review website can be found at http://www.surveyreview.org

    URI
    http://hdl.handle.net/20.500.11937/38699
    Collection
    • Curtin Research Publications
    Abstract

    This paper compares the gridding of two types of terrestrial gravity anomaly prior to the computation of regional gravimetric geoid models over Australia. The aim is to investigate the effects of high-frequency components (by way of the terrain correction) on the resulting grid of mean gravity anomalies, and hence the geoid. The gravity anomaly types investigated comprise simple Bougner anomalies and refined Bougner anomalies, both computed using a constant topographic mass density. Irrespective of which anomaly type is used for gridding, the relevant additional correction terms are applied to yield an approximation of the mean Helmert anomaly. Regional gravimetric geoid models are then computed over Austalia and compared with one another and with GPS-levelling points on the Australian Height Datum. This shows that the application of terrain corrections before and after gravity gridding has only a relatively small effect on the computed goid in Australia.

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