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...

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Published in:Journal of Geodesy
Main Authors: Schack, P., Hirt, C., Hauk, M., Featherstone, Will, Lyon, Todd, Guillaume, S.
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
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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
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