Using a combination of terrestrial free air anomalies and a geopotenlial model, a gravimetric geoid model has been determined on a one-degree geographical grid for Australia. The results show a geoid separation increasing in a north-easterly direction from - 35 m in the south-west to +70 m in the north of Cape York. Some comparisons have been made with GPS-derived height data and the results suggest that this geoid model may be used to transform GPS heights to orthometric heights in Australia.
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John Gilliland (1989) studied this question.
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