Australia (AUSGEOID09)
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Authors: W. Featherstone, et al. |
Created: 2009
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Resp: AUSLIG |
Description:
AUSGeoid09 is an 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. DOI: 10.1007/s00190-010-0422-2
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. DOI: 10.1080/14498596.2011.580498
Web of Science ID:
DRCI:DATA2015229007462423
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