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...
Published in: | Journal of Geodesy |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Springer - Verlag
2018
|
Subjects: | |
Online Access: | https://hdl.handle.net/20.500.11937/66364 https://doi.org/10.1007/s00190-017-1107-x |
id |
ftcurtin:oai:espace.curtin.edu.au:20.500.11937/66364 |
---|---|
record_format |
openpolar |
spelling |
ftcurtin:oai:espace.curtin.edu.au:20.500.11937/66364 2023-06-11T04:05:40+02:00 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. 2018 fulltext https://hdl.handle.net/20.500.11937/66364 https://doi.org/10.1007/s00190-017-1107-x unknown Springer - Verlag http://hdl.handle.net/20.500.11937/66364 doi:10.1007/s00190-017-1107-x Journal Article 2018 ftcurtin https://doi.org/20.500.11937/6636410.1007/s00190-017-1107-x 2023-05-30T19:52:04Z 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. Article in Journal/Newspaper Antarc* Antarctica Curtin University: espace Journal of Geodesy 92 10 1143 1153 |
institution |
Open Polar |
collection |
Curtin University: espace |
op_collection_id |
ftcurtin |
language |
unknown |
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. |
format |
Article in Journal/Newspaper |
author |
Schack, P. Hirt, C. Hauk, M. Featherstone, Will Lyon, Todd Guillaume, S. |
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 |
author_facet |
Schack, P. Hirt, C. Hauk, M. Featherstone, Will Lyon, Todd Guillaume, S. |
author_sort |
Schack, P. |
title |
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_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_sort |
high-precision digital astrogeodetic traverse in an area of steep geoid gradients close to the coast of perth, western australia |
publisher |
Springer - Verlag |
publishDate |
2018 |
url |
https://hdl.handle.net/20.500.11937/66364 https://doi.org/10.1007/s00190-017-1107-x |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
http://hdl.handle.net/20.500.11937/66364 doi:10.1007/s00190-017-1107-x |
op_doi |
https://doi.org/20.500.11937/6636410.1007/s00190-017-1107-x |
container_title |
Journal of Geodesy |
container_volume |
92 |
container_issue |
10 |
container_start_page |
1143 |
op_container_end_page |
1153 |
_version_ |
1768377251972251648 |