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AUSGeoid09 radically improves height determination
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Available under University of Tasmania Standard License.
In March 2011, Geoscience Australia released AUSGeoid09, replacing its decade-old ancestor AUSGeoid98. AUSGeoid09 provides an improved geoid model for Australia to relate GNSS-derived ellipsoidal heights to the Australian Height Datum (AHD71, or AHD83 in Tasmania) and vice versa. According to Geoscience Australia, it is expected to convert GNSS heights to AHD71 heights to better than 50 millimetres across most of Australia. In some areas the accuracy may exceed a decimetre due to localised errors in the ageing levelling network, GNSS observational errors, land subsidence, geoid anomalies, or simply a lack of data in some remote locations. In comparison, its predecessor AUSGeoid98 only provided an estimated accuracy of better than 0.4 metres in absolute terms. This article shows that the new AUSGeoid09 geoid model radically improves GNSS-based AHD71 height determination in New South Wales.
|Keywords:||AUSGeoid09, AHD71, GNSS, CORS, geoid undulation, height transfer|
|Journal or Publication Title:||Position|
|Page Range:||pp. 36-38|
Originally published in Position magazine by Intermedia Group Pty Ltd.
|Date Deposited:||27 Jun 2011 02:09|
|Last Modified:||18 Nov 2014 04:19|
|Item Statistics:||View statistics for this item|
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