Crossover Adjustment of New Zealand Marine Gravity Data, and Comparisons with Satellite Altimetry and Global Geopotential Models
This paper summarises the crossover adjustment of approximately 90,000-line-km of ship-track gravity observations around New Zealand. The adjustment reduced the standard deviation of the ~106 crossovers from ~2.0 mgal to ~0.3 mgal. These data were then used to assess four different grids of satellit...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Conference Paper |
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Springer
2005
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| Online Access: | http://hdl.handle.net/20.500.11937/20408 |
| _version_ | 1848750297097175040 |
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| author | Amos, Matthew Featherstone, Will Brett, J. |
| author2 | Christopher Jekeli |
| author_facet | Christopher Jekeli Amos, Matthew Featherstone, Will Brett, J. |
| author_sort | Amos, Matthew |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This paper summarises the crossover adjustment of approximately 90,000-line-km of ship-track gravity observations around New Zealand. The adjustment reduced the standard deviation of the ~106 crossovers from ~2.0 mgal to ~0.3 mgal. These data were then used to assess four different grids of satellite-altimeter-derived gravity anomalies. The KMS02 altimeter grid was selected for use around New Zealand as it gave a better fit to the coastal ship-track data. Least-squares collocation was then used to 'drape' the altimetry onto the crossover-adjusted ship-tracks to counter the well-known problems with satellite altimeter data near the coast. The precision of this merged ship-altimeter gravity dataset is estimated to be 3.5 mgal. |
| first_indexed | 2025-11-14T07:34:35Z |
| format | Conference Paper |
| id | curtin-20.500.11937-20408 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:34:35Z |
| publishDate | 2005 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-204082022-10-20T04:47:14Z Crossover Adjustment of New Zealand Marine Gravity Data, and Comparisons with Satellite Altimetry and Global Geopotential Models Amos, Matthew Featherstone, Will Brett, J. Christopher Jekeli Luisa Bastos Joana Fernandes crossover adjustment satellite altimetry geopotential model marine gravimetry gravity This paper summarises the crossover adjustment of approximately 90,000-line-km of ship-track gravity observations around New Zealand. The adjustment reduced the standard deviation of the ~106 crossovers from ~2.0 mgal to ~0.3 mgal. These data were then used to assess four different grids of satellite-altimeter-derived gravity anomalies. The KMS02 altimeter grid was selected for use around New Zealand as it gave a better fit to the coastal ship-track data. Least-squares collocation was then used to 'drape' the altimetry onto the crossover-adjusted ship-tracks to counter the well-known problems with satellite altimeter data near the coast. The precision of this merged ship-altimeter gravity dataset is estimated to be 3.5 mgal. 2005 Conference Paper http://hdl.handle.net/20.500.11937/20408 10.1007/3-540-26932-0_46 Springer restricted |
| spellingShingle | crossover adjustment satellite altimetry geopotential model marine gravimetry gravity Amos, Matthew Featherstone, Will Brett, J. Crossover Adjustment of New Zealand Marine Gravity Data, and Comparisons with Satellite Altimetry and Global Geopotential Models |
| title | Crossover Adjustment of New Zealand Marine Gravity Data, and Comparisons with Satellite Altimetry and Global Geopotential Models |
| title_full | Crossover Adjustment of New Zealand Marine Gravity Data, and Comparisons with Satellite Altimetry and Global Geopotential Models |
| title_fullStr | Crossover Adjustment of New Zealand Marine Gravity Data, and Comparisons with Satellite Altimetry and Global Geopotential Models |
| title_full_unstemmed | Crossover Adjustment of New Zealand Marine Gravity Data, and Comparisons with Satellite Altimetry and Global Geopotential Models |
| title_short | Crossover Adjustment of New Zealand Marine Gravity Data, and Comparisons with Satellite Altimetry and Global Geopotential Models |
| title_sort | crossover adjustment of new zealand marine gravity data, and comparisons with satellite altimetry and global geopotential models |
| topic | crossover adjustment satellite altimetry geopotential model marine gravimetry gravity |
| url | http://hdl.handle.net/20.500.11937/20408 |