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Regional Models

Australia (AUSGEOID09)


  Authors: W. Featherstone, et al.     Created: 2009    Resp: AUSLIG  
      Status: PUBLIC    
Description:
AUSGeoid09 is the latest Australia-wide gravimetric quasigeoid model that has been a posteriori fitted to the Australian Height Datum (AHD) so as to provide a product that is practically useful for the more direct determination of AHD heights from Global Navigation Satellite Systems (GNSS). The gravimetric component of the quasigeoid model was computed using a hybrid of the remove-compute-restore technique with a degree-40 deterministically modified kernel over a one-degree spherical cap. The zero-tide EGM2008 global gravitational model to degree 2,190 was used as the reference field. Other input data are ~1.4 million land gravity anomalies from Geoscience Australia, 1' x 11 DNSC2008GRA altimeter-derived gravity anomalies offshore, the 9' x 9' GEODATA-DEM9S Australian digital elevation model, and a readjustment of Australian National Levelling Network (ANLN) constrained to the CARS2006 mean dynamic ocean topography model.

References:
W.E. Featherstone, J.F. Kirby, C. Hirt, M.S. Filmer, S.J. Claessens, N.J. Brown, G. Hu, G.M. Johnston (2010). The AUSGeoid09 model of the Australian Height Datum. Journal of Geodesy, 85(3), pp. 133-150.
N.J. Brown, W.E. Featherstone G. Hu, G.M. Johnston (2011). AUSGeoid09: a more direct and more accurate method of converting ellipsoidal heights to AHD heights. Journal of Spatial Science, 56(1), pp. 27-37.

Australia2009