A high-precision digital astrogeodetic traverse in an area of steep geoid gradients close to the coast of Perth, Western Australia
We present results from a new vertical deflection (VD) traverse observed in Perth, Western Australia, which is the first of its kind in the Southern Hemisphere. A digital astrogeodetic QDaedalus instrument was deployed to measure VDs with ~0.2 ′′ precision at 39 benchmarks with a ∼1 km spacing. For...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
Springer - Verlag
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/66364 |
| _version_ | 1848761304425168896 |
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| author | Schack, P. Hirt, C. Hauk, M. Featherstone, Will Lyon, Todd Guillaume, S. |
| author_facet | Schack, P. Hirt, C. Hauk, M. Featherstone, Will Lyon, Todd Guillaume, S. |
| author_sort | Schack, P. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present results from a new vertical deflection (VD) traverse observed in Perth, Western Australia, which is the first of its kind in the Southern Hemisphere. A digital astrogeodetic QDaedalus instrument was deployed to measure VDs with ~0.2 ′′ precision at 39 benchmarks with a ∼1 km spacing. For the conversion of VDs to quasigeoid height differences, the method of astronomical–topographical levelling was applied, based on topographical information from the Shuttle Radar Topography Mission. The astronomical quasigeoid heights are in 20–30 mm (RMS) agreement with three independent gravimetric quasigeoid models, and the astrogeodetic VDs agree to 0.2–0.3′′ (north–south) and 0.6–0.9′′ (east–west) RMS. Tilt-like biases of ∼1mm over ∼1km are present for all quasigeoid models within ∼20km of the coastline, suggesting inconsistencies in the coastal zone gravity data. The VD campaign in Perth was designed as a low-cost effort, possibly allowing replication in other Southern Hemisphere countries (e.g., Asia, Africa, South America and Antarctica), where VD data are particularly scarce. |
| first_indexed | 2025-11-14T10:29:33Z |
| format | Journal Article |
| id | curtin-20.500.11937-66364 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:29:33Z |
| publishDate | 2018 |
| publisher | Springer - Verlag |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-663642019-02-19T05:36:14Z A high-precision digital astrogeodetic traverse in an area of steep geoid gradients close to the coast of Perth, Western Australia Schack, P. Hirt, C. Hauk, M. Featherstone, Will Lyon, Todd Guillaume, S. We present results from a new vertical deflection (VD) traverse observed in Perth, Western Australia, which is the first of its kind in the Southern Hemisphere. A digital astrogeodetic QDaedalus instrument was deployed to measure VDs with ~0.2 ′′ precision at 39 benchmarks with a ∼1 km spacing. For the conversion of VDs to quasigeoid height differences, the method of astronomical–topographical levelling was applied, based on topographical information from the Shuttle Radar Topography Mission. The astronomical quasigeoid heights are in 20–30 mm (RMS) agreement with three independent gravimetric quasigeoid models, and the astrogeodetic VDs agree to 0.2–0.3′′ (north–south) and 0.6–0.9′′ (east–west) RMS. Tilt-like biases of ∼1mm over ∼1km are present for all quasigeoid models within ∼20km of the coastline, suggesting inconsistencies in the coastal zone gravity data. The VD campaign in Perth was designed as a low-cost effort, possibly allowing replication in other Southern Hemisphere countries (e.g., Asia, Africa, South America and Antarctica), where VD data are particularly scarce. 2018 Journal Article http://hdl.handle.net/20.500.11937/66364 10.1007/s00190-017-1107-x Springer - Verlag fulltext |
| spellingShingle | Schack, P. Hirt, C. Hauk, M. Featherstone, Will Lyon, Todd Guillaume, S. A high-precision digital astrogeodetic traverse in an area of steep geoid gradients close to the coast of Perth, Western Australia |
| title | A high-precision digital astrogeodetic traverse in an area of steep geoid gradients close to the coast of Perth, Western Australia |
| title_full | A high-precision digital astrogeodetic traverse in an area of steep geoid gradients close to the coast of Perth, Western Australia |
| title_fullStr | A high-precision digital astrogeodetic traverse in an area of steep geoid gradients close to the coast of Perth, Western Australia |
| title_full_unstemmed | A high-precision digital astrogeodetic traverse in an area of steep geoid gradients close to the coast of Perth, Western Australia |
| title_short | A high-precision digital astrogeodetic traverse in an area of steep geoid gradients close to the coast of Perth, Western Australia |
| title_sort | high-precision digital astrogeodetic traverse in an area of steep geoid gradients close to the coast of perth, western australia |
| url | http://hdl.handle.net/20.500.11937/66364 |