Indirect evaluation of Mars Gravity Model 2011 using a replication experiment on Earth
Curtin University’s Mars Gravity Model 2011 (MGM2011) is a high-resolution composite set of gravity field functionals that uses topography-implied gravity effects at medium- and short-scales (~125 km to ~3 km) to augment the space-collected MRO110B2 gravity model. Ground-truth gravity observations...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Springer
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/26706 |
| _version_ | 1848752062713561088 |
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| author | Hirt, Christian Claessens, Sten Kuhn, Michael Featherstone, Will |
| author_facet | Hirt, Christian Claessens, Sten Kuhn, Michael Featherstone, Will |
| author_sort | Hirt, Christian |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Curtin University’s Mars Gravity Model 2011 (MGM2011) is a high-resolution composite set of gravity field functionals that uses topography-implied gravity effects at medium- and short-scales (~125 km to ~3 km) to augment the space-collected MRO110B2 gravity model. Ground-truth gravity observations that could be used for direct validation of MGM2011 are not available on Mars’s surface. To indirectly evaluate MGM2011 and its modelling principles, an as-close-as-possible replication of the MGM2011 modelling approach was performed on Earth as the planetary body with most detailed gravity field knowledge available. Comparisons among six ground-truth data sets (gravity disturbances, quasigeoid undulations and vertical deflections) and the MGM2011-replication over Europe and North America show unanimously that topography-implied gravity information improves upon space-collected gravity models over areas with rugged terrain. The improvements are ~55% and ~67% for gravity disturbances, ~12% and ~47% for quasigeoid undulations, and ~30% to ~50% for vertical deflections. Given that the correlation between space-collected gravity and topography is higher for Mars than Earth at spatial scales of a few 100 km, topography-implied gravity effects are more dominant on Mars. It is therefore reasonable to infer that the MGM2011 modelling approach is suitable, offering an improvement over space-collected Martian gravity field models. |
| first_indexed | 2025-11-14T08:02:39Z |
| format | Journal Article |
| id | curtin-20.500.11937-26706 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:02:39Z |
| publishDate | 2012 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-267062017-09-13T15:56:21Z Indirect evaluation of Mars Gravity Model 2011 using a replication experiment on Earth Hirt, Christian Claessens, Sten Kuhn, Michael Featherstone, Will topography Mars gravity field forward-modelling Earth gravity field gravity Curtin University’s Mars Gravity Model 2011 (MGM2011) is a high-resolution composite set of gravity field functionals that uses topography-implied gravity effects at medium- and short-scales (~125 km to ~3 km) to augment the space-collected MRO110B2 gravity model. Ground-truth gravity observations that could be used for direct validation of MGM2011 are not available on Mars’s surface. To indirectly evaluate MGM2011 and its modelling principles, an as-close-as-possible replication of the MGM2011 modelling approach was performed on Earth as the planetary body with most detailed gravity field knowledge available. Comparisons among six ground-truth data sets (gravity disturbances, quasigeoid undulations and vertical deflections) and the MGM2011-replication over Europe and North America show unanimously that topography-implied gravity information improves upon space-collected gravity models over areas with rugged terrain. The improvements are ~55% and ~67% for gravity disturbances, ~12% and ~47% for quasigeoid undulations, and ~30% to ~50% for vertical deflections. Given that the correlation between space-collected gravity and topography is higher for Mars than Earth at spatial scales of a few 100 km, topography-implied gravity effects are more dominant on Mars. It is therefore reasonable to infer that the MGM2011 modelling approach is suitable, offering an improvement over space-collected Martian gravity field models. 2012 Journal Article http://hdl.handle.net/20.500.11937/26706 10.1007/s11200-011-0468-5 Springer fulltext |
| spellingShingle | topography Mars gravity field forward-modelling Earth gravity field gravity Hirt, Christian Claessens, Sten Kuhn, Michael Featherstone, Will Indirect evaluation of Mars Gravity Model 2011 using a replication experiment on Earth |
| title | Indirect evaluation of Mars Gravity Model 2011 using a replication experiment on Earth |
| title_full | Indirect evaluation of Mars Gravity Model 2011 using a replication experiment on Earth |
| title_fullStr | Indirect evaluation of Mars Gravity Model 2011 using a replication experiment on Earth |
| title_full_unstemmed | Indirect evaluation of Mars Gravity Model 2011 using a replication experiment on Earth |
| title_short | Indirect evaluation of Mars Gravity Model 2011 using a replication experiment on Earth |
| title_sort | indirect evaluation of mars gravity model 2011 using a replication experiment on earth |
| topic | topography Mars gravity field forward-modelling Earth gravity field gravity |
| url | http://hdl.handle.net/20.500.11937/26706 |