Relative performance of AUSGeoid09 in mountainous terrain
Article
Article Title | Relative performance of AUSGeoid09 in mountainous terrain |
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ERA Journal ID | 201007 |
Article Category | Article |
Authors | Sussanna, V. (Author), Janssen, V. (Author) and Gibbings, P. (Author) |
Journal Title | Journal of Geodetic Science |
Journal Citation | 6 (1), pp. 34-42 |
Number of Pages | 9 |
Year | 2016 |
Place of Publication | Germany |
ISSN | 2081-9919 |
2081-9943 | |
Digital Object Identifier (DOI) | https://doi.org/10.1515/jogs-2016-0002 |
Web Address (URL) | https://www.degruyter.com/document/doi/10.1515/jogs-2016-0002/html |
Abstract | The Australian Height Datum (AHD) is the national vertical datum for Australia, and AUSGeoid09 is the latest quasigeoid model used to compute (normalorthometric) AHD heights from Global Navigation Satellite System (GNSS) derived ellipsoidal heights. While previous studies have evaluated the AUSGeoid09 model across Australia, such studies have generally not focused on mountainous terrain. This paper investigates the performance of AUSGeoid09 in a relative sense in the Mid Hunter and Snowy Mountains regions of New South Wales, from a user’s perspective. Relative (i.e. height difference between two points) comparisons were undertaken between AUSGeoid09-derived heights and official AHD heights. The performance of AUSGeoid09 was compared to its predecessor AUSGeoid98. In both study areas, an overall improvement was evident when applying AUSGeoid09 to compute AHD height differences. AUSGeoid09 generally provided AHD height differences at the ±0.05 m to ±0.09 m level (1 sigma) and substantially increased the percentage of GNSS-derived height differences meeting 3rd order differential levelling specifications. This is a very encouraging result, considering the difficulties of spirit levelling in mountainous terrain and the increasing popularity of GNSS-based height transfer in practice. |
Keywords | AUSGeoid09, Australian Height Datum, geoid model, Global Navigation Satellite System, N values, national datums |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401306. Surveying (incl. hydrographic surveying) |
401302. Geospatial information systems and geospatial data modelling | |
Byline Affiliations | Department of Finance, Services and Innovation, New South Wales |
Faculty of Health, Engineering and Sciences | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q762z/relative-performance-of-ausgeoid09-in-mountainous-terrain
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