A Gravimetric Geoid model of Tasmania, computed using the One-dimensional Fast Fourier Transform and a Deterministically Modified Kernel
MetadataShow full item record
A new gravimetric estimate of the separation between the GRS80 ellipsoid and the geoid over Tasmania and surrounding seas has been made. The geoid model utilised a combination of the EGM96 global geopotential model, the 1992 release of the Australian gravity database, and a nine-second digital elevation model. The computational technique used was the one-dimensional fast Fourier transform (1D-FFT), which has been refined so as to include deterministically modified Stokes integration kernels. Comparisons were made among Global Positioning System heights, optical levelling on the Australian Height Datum (Tasmania) and several gravimetric geoid solutions at 14 points. This showed that the Vanicek and Kleusberg (1987) modification for a degree 20 spheroid and cap radius of 15 gave the smallest standard deviation of 186mm, which is a slight improvement upon the 232mm achieved when using AUSGEOID93.
Geomantics Research Australasia has been succeeded by Journal of Spatial Science.
Showing items related by title, author, creator and subject.
A re-evaluation of the offset in the Australian Height Datum between mainland Australia and TasmaniaFeatherstone, Will; Filmer, Michael (2012)The adoption of local mean sea level (MSL) at multiple tide-gauges as a zero reference level for the Australian Height Datum (AHD) has resulted in a spatially variable offset between the geoid and the AHD. This is caused ...
Towards the unification of the Australian Height Datum between mainland and Tasmania using GPS and AUSGeoid98Featherstone, Will (2000)The AUSGeoid98 geoid model is used in conjunction with nation-wide GPS networks and spirit-levelled Australian Height Datum (AHD) heights at 1013 points, and subsets thereof, to estimate the vertical offset between the ...
Tenzer, R.; Hirt, C.; Claessens, Sten; Novák, P. (2015)In geodesy, the geoid and the quasigeoid are used as a reference surface for heights. Despite some similarities between these two concepts, the differences between the geoid and the quasigeoid (i.e. the geoid-to-quasigeoid ...