Description and release of Australian gravity field model testing data |
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| Authors: | W. E. Featherstone N. J. Brown J. C. McCubbine M. S. Filmer |
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| Affiliation: | 1. Department of Spatial Sciences &2. The Institute for Geoscience Research, Curtin University of Technology, GPO Box U1987, Perth, WA 6845, Australia;3. Cooperative Research Centre for Spatial Information, Level 5, 204 Lygon Street, Carlton, Vic 3053, Australia;4. Geodesy Section, Community Safety and Earth Monitoring Division, Geoscience Australia, GPO Box 378, Canberra, ACT 2601, Australia |
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| Abstract: | Gravimetric geoid and/or quasigeoid models are routinely evaluated using co-located GPS-levelling and/or astrogeodetic vertical deflections, globally and regionally. This short note describes these ground-truth data for Australia as of August 2017, which are provided as Electronic Supplementary Material. We provide ～7500 GPS-derived ellipsoidal heights, normal-orthometric heights from the 1971 adjustment of the Australian Height Datum, normal heights from a readjustment of levelling constrained to a model of the ocean's mean dynamic topography, and ～1000 historical astrogeodetic vertical deflections. Updates to these data will be posted on the Intergovernmental Committee on Surveying and Mapping GitHub repository (https://github.com/icsm-au), together with a readme.txt file describing them. |
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| Keywords: | GPS levelling vertical deflections gravity model testing Australia vertical datum offsets heights |
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