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    A Comparison of Techniques for the Integration of Satellite Altimeter and Surface Gravity Data for Geoid Determination

    20638_downloaded_stream_94.pdf (147.7Kb)
    Access Status
    Open access
    Authors
    Kirby, Jon
    Forsberg, R.
    Date
    1998
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Kirby, J. F. and Forsberg, R.. 1998. : A Comparison of Techniques for the Integration of Satellite Altimeter and Surface Gravity Data for Geoid Determination, in Forsberg, R. and Feissel, M. and Dietrich, R. (ed), IAG Scientific Assembly, 01 Sep 1997, pp. 207-212. Rio de Janeiro: Springer-Verlag.
    Source Title
    Geodesy on the Move: Gravity, Geoid, Geodynamics, and Antarctica
    Source Conference
    IAG Scientific Assembly
    Faculty
    Division of Resources and Environment
    Department of Spatial Sciences
    URI
    http://hdl.handle.net/20.500.11937/4834
    Collection
    • Curtin Research Publications
    Abstract

    Two methods are tested whereby satellite altimeter measurements of the geoid height are combined with surface measurements of the free-air gravity anomaly. The study area comprises the oceans around the Australian continent. The first method involves draping a grid of the free-air anomaly from satellite data onto a grid of the ship and land data. The second method utilises grids of the altimeter-derived geoid height, combining these with the surface data in an iterative superposition. Preliminary results show that the draping method yields a fit of 5.4 mGal between the satellite and marine data, while the iterative procedure returns 8.1 mGal. Further work can be done, however, to improve these results. The impact of the combined marine gravity data sets is illustrated by comparing the effects on an Australia-wide spherical-FFT geoid solution.

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