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| Titel: |
Regional gravimetric geoid calculations in the north sea test area |
| Auteur: |
Torge, Wolfgang |
| Verschenen in: |
Marine geodesy |
| Paginering: | Jaargang 3 (1980) nr. 1-4 pagina's 257-271 |
| Jaar: |
1980 |
| Inhoud: |
The present paper reports on results obtained with research work related to the SEASAT-A North Sea project. In the North Sea test area, a regional gravimetric geoid of high precision and resolution (50 km) has been calculated, using a combination of the present available terrestrial gravity data and the GEM 8 earth model. The accuracy of this geoid has been estimated by comparing it with the astrogeodetic geoid calculated for the adjoining land areas, and with the GEOS-3 altimetric geoid for the German Bay. It is found that in the region of good gravity coverage (6' x 10' mean anomalies), geoid height differences can be derived with an accuracy of ±0.2 ... 0.6 m, depending on the point distance (50. . .500 km). Gravimetric deflections of the vertical have an accuracy of ±0.5?... 1.0? in this range. These results correspond to the accuracy obtainable by astrogeodetic methods in flat areas and by GEOS-3 satellite altimetry. The accuracy of geoid differences decreases to ±0.7. . .1.0 m (range 50...1,000 km) if only 1o × 1o mean anomalies exist in the calculation area. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 46 van 57 gevonden artikelen
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