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    The New Zealand gravimetric quasigeoid model 2017 that incorporates nationwide airborne gravimetry

    259076.pdf (1.520Mb)
    Access Status
    Open access
    Authors
    McCubbine, J.
    Amos, M.
    Tontini, F.
    Smith, E.
    Winefied, R.
    Stagpoole, V.
    Featherstone, Will
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    McCubbine, J. and Amos, M. and Tontini, F. and Smith, E. and Winefied, R. and Stagpoole, V. and Featherstone, W. 2017. The New Zealand gravimetric quasigeoid model 2017 that incorporates nationwide airborne gravimetry. Journal of Geodesy. 92 (8): pp. 923–937.
    Source Title
    Journal of Geodesy
    DOI
    10.1007/s00190-017-1103-1
    ISSN
    0949-7714
    School
    Department of Spatial Sciences
    Remarks

    The final publication is available at Springer via http://dx.doi.org/10.1007/s00190-017-1103-1

    URI
    http://hdl.handle.net/20.500.11937/60274
    Collection
    • Curtin Research Publications
    Abstract

    A one arc-minute resolution gravimetric quasigeoid model has been computed for New Zealand, covering the region (Formula presented.)–(Formula presented.) and (Formula presented.)–(Formula presented.). It was calculated by Wong and Gore modified Stokes integration using the remove–compute–restore technique with the EIGEN-6C4 global gravity model as the reference field. The gridded gravity data used for the computation consisted of 40,677 land gravity observations, satellite altimetry-derived marine gravity anomalies, historical shipborne marine gravity observations and, importantly, approximately one million new airborne gravity observations. The airborne data were collected with the specific intention of reinforcing the shortcomings of the existing data in areas of rough topography inaccessible to land gravimetry and in coastal areas where shipborne gravimetry cannot be collected and altimeter-derived gravity anomalies are generally poor. The new quasigeoid has a nominal precision of (Formula presented.) on comparison with GPS-levelling data, which is approximately (Formula presented.) less than its predecessor NZGeoid09.

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