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Regional Models

Australia (AUSGEOID09)

  Authors: W. Featherstone, et al.     Created: 2009    Resp: AUSLIG  
      Status: PUBLIC    
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.

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.