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    Satellite and airborne gravimetry: their role in geoid determination and some suggestions

    154655_154655.pdf (645.8Kb)
    Access Status
    Open access
    Authors
    Featherstone, Will
    Date
    2010
    Type
    Book Chapter
    
    Metadata
    Show full item record
    Citation
    Featherstone, W.E. 2010. Satellite and airborne gravimetry: their role in geoid determination and some suggestions, in Lane, R. (ed), Airborne Gravity 2010. pp. 58-70. Australia: Geoscience Australia.
    Source Title
    Airborne Gravity 2010
    ISBN
    9781921781179
    School
    Department of Spatial Sciences
    Remarks

    © Commonwealth of Australia (Geoscience Australia) 2010. With the exception of the Commonwealth Coat of Arms and where otherwise noted, all material in this publication is provided under a Creative Commons Attribution 3.0 Australia licence. <<a href="http://creativecommons.org/licenses/by/3.0/au/legalcode">http://creativecommons.org/licenses/by/3.0/au/legalcode</a>>

    URI
    http://hdl.handle.net/20.500.11937/42531
    Collection
    • Curtin Research Publications
    Abstract

    This paper will cover a variety of topics. First, it will briefly overview the GRACE (Gravity Recovery and Climate Experiment) and GOCE (Gravity field and steady-state Ocean Circulation Explorer) satellite mission concepts, with a view to the improvements made (and to be made) to the global gravity field. Second, it will summarise some results of the assessment of the recent EGM2008 global gravity field model, which has a spatial resolution of about 10 km. Third, it will describe the computation and evaluation of the AUSGeoid09 model that will be released by Geoscience Australia in the very near future. All three topics will be set in the framework of the restrictions of current data and how airborne gravimetry can contribute. With the increased interest in coastal zone mapping because of threats like sea level change and tsunamis, airborne gravimetry can bridge the gap between land and satellite altimeter-derived gravity data.As such, a proposal will be made to collect airborne gravimetry in key Australian coastal zones, but preferably along the entire coastline! Another area that lacks gravity data is Antarctica, which can adversely affect global gravity field models (the polar-gap problem). Airborne gravimetry has already been used to survey the gravity field of the Arctic, so another proposal will be made to collect airborne gravity over Antarctica. Of course, both are ambitious and massive projects, but it is important to consider them as valuable applications of airborne gravimetry.

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