Fitting gravimetric geoid models to vertical deflections
Regional gravimetric geoid and quasigeoid models are now commonly fitted to GPS-levelling data, which simultaneously absorbs levelling, GPS and quasi/geoid errors due to their inseparability. We propose that independent vertical deflections are used instead, which are not affected by this inseparabi...
| Main Authors: | , |
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| Format: | Journal Article |
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Springer - Verlag
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/7160 |
| _version_ | 1848745286288015360 |
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| author | Featherstone, Will Lichti, D. |
| author_facet | Featherstone, Will Lichti, D. |
| author_sort | Featherstone, Will |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Regional gravimetric geoid and quasigeoid models are now commonly fitted to GPS-levelling data, which simultaneously absorbs levelling, GPS and quasi/geoid errors due to their inseparability. We propose that independent vertical deflections are used instead, which are not affected by this inseparability problem. The formulation is set out for geoid slopes and changes in slopes. Application to 1080 astrogeodetic deflections over Australia for the AUSGeoid98 model shows that it is feasible, but the poor quality of the historical astrogeodetic deflections led to some unrealistic values. |
| first_indexed | 2025-11-14T06:14:57Z |
| format | Journal Article |
| id | curtin-20.500.11937-7160 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:14:57Z |
| publishDate | 2009 |
| publisher | Springer - Verlag |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-71602017-09-13T16:01:43Z Fitting gravimetric geoid models to vertical deflections Featherstone, Will Lichti, D. vertical deflections vertical datum errors Gravimetric geoid errors Regional gravimetric geoid and quasigeoid models are now commonly fitted to GPS-levelling data, which simultaneously absorbs levelling, GPS and quasi/geoid errors due to their inseparability. We propose that independent vertical deflections are used instead, which are not affected by this inseparability problem. The formulation is set out for geoid slopes and changes in slopes. Application to 1080 astrogeodetic deflections over Australia for the AUSGeoid98 model shows that it is feasible, but the poor quality of the historical astrogeodetic deflections led to some unrealistic values. 2009 Journal Article http://hdl.handle.net/20.500.11937/7160 10.1007/s00190-008-0263-4 Springer - Verlag fulltext |
| spellingShingle | vertical deflections vertical datum errors Gravimetric geoid errors Featherstone, Will Lichti, D. Fitting gravimetric geoid models to vertical deflections |
| title | Fitting gravimetric geoid models to vertical deflections |
| title_full | Fitting gravimetric geoid models to vertical deflections |
| title_fullStr | Fitting gravimetric geoid models to vertical deflections |
| title_full_unstemmed | Fitting gravimetric geoid models to vertical deflections |
| title_short | Fitting gravimetric geoid models to vertical deflections |
| title_sort | fitting gravimetric geoid models to vertical deflections |
| topic | vertical deflections vertical datum errors Gravimetric geoid errors |
| url | http://hdl.handle.net/20.500.11937/7160 |