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    Evaluation of Gravity and Altimetry Data in Australian Coastal Regions

    Access Status
    Fulltext not available
    Authors
    Claessens, Sten
    Date
    2012
    Type
    Book Chapter
    
    Metadata
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    Citation
    Claessens, Sten. 2012. Evaluation of Gravity and Altimetry Data in Australian Coastal Regions, in Kenyon, S. and Pacino, M.and Uri, M. (ed), Geodesy for Planet Earth: Proceedings of the 2009 IAG Symposium, Volume 136, pp. 435-442. Germany: Springer.
    Source Title
    Geodesy for Planet Earth: International Association of Geodesy Symposia, Volume 136
    DOI
    10.1007/978-3-642-20338-1_52
    ISBN
    9783642203374
    URI
    http://hdl.handle.net/20.500.11937/25591
    Collection
    • Curtin Research Publications
    Abstract

    Satellite altimetry in near-coastal marine areas is notoriously problematic, and gravity anomalies derived from various satellite-altimetry-derived gravity models differ significantly near the coast. In this paper, gravity anomalies from the DNSC08 and Sandwell & Smith v18.1 (SS18) models are compared and ‘validated’ against shipborne and airborne gravity anomalies around the Australian coast. Due to the scarcity of high-quality gravity observations just off the coast, a true validation of the models cannot be achieved. However, DNSC08 conforms slightly better to both shipborne and airborne gravity observations closest to the coast in selected test areas, although the standard deviation of differences between the models and the test data barely exceeds the estimated test data accuracy.

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