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    The first Australian gravimetric quasigeoid model with location-specific uncertainty estimates

    254823.pdf (10.19Mb)
    Access Status
    Open access
    Authors
    Featherstone, Will
    McCubbine, Jack
    Brown, N.
    Claessens, Sten
    Filmer, Michael
    Kirby, Jon
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Featherstone, W. and McCubbine, J. and Brown, N. and Claessens, S. and Filmer, M. and Kirby, J. 2018. The first Australian gravimetric quasigeoid model with location-specific uncertainty estimates. Journal of Geodesy. 92 (2): pp. 149-168.
    Source Title
    Journal of Geodesy
    DOI
    10.1007/s00190-017-1053-7
    ISSN
    0949-7714
    School
    Department of Spatial Sciences
    Remarks

    Copyright © 2017 The Author(s)

    URI
    http://hdl.handle.net/20.500.11937/56287
    Collection
    • Curtin Research Publications
    Abstract

    We describe the computation of the first Australian quasigeoid model to include error estimates as a function of location that have been propagated from uncertainties in the EGM2008 global model, land and altimeter-derived gravity anomalies and terrain corrections. The model has been extended to include Australia’s offshore territories and maritime boundaries using newer datasets comprising an additional (Formula presented.)280,000 land gravity observations, a newer altimeter-derived marine gravity anomaly grid, and terrain corrections at (Formula presented.) resolution. The error propagation uses a remove–restore approach, where the EGM2008 quasigeoid and gravity anomaly error grids are augmented by errors propagated through a modified Stokes integral from the errors in the altimeter gravity anomalies, land gravity observations and terrain corrections. The gravimetric quasigeoid errors (one sigma) are 50–60 mm across most of the Australian landmass, increasing to (Formula presented.) mm in regions of steep horizontal gravity gradients or the mountains, and are commensurate with external estimates.

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