One technique for refining the global Earth gravity models
| Autor: | O. V. Polovnev, V. N. Koneshov, V. B. Nepoklonov |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Geopotential
010504 meteorology & atmospheric sciences European Combined Geodetic Network Elevation Geophysics 010502 geochemistry & geophysics Geodesy 01 natural sciences Gravity anomaly Gravity of Earth Theoretical gravity Geoid General Earth and Planetary Sciences Gravimetry Geology 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Izvestiya, Physics of the Solid Earth. 53:108-115 |
| ISSN: | 1555-6506 1069-3513 |
| DOI: | 10.1134/s1069351316060045 |
| Popis: | The results of the theoretical and experimental research on the technique for refining the global Earth geopotential models such as EGM2008 in the continental regions are presented. The discussed technique is based on the high-resolution satellite data for the Earth’s surface topography which enables the allowance for the fine structure of the Earth’s gravitational field without the additional gravimetry data. The experimental studies are conducted by the example of the new GGMplus global gravity model of the Earth with a resolution about 0.5 km, which is obtained by expanding the EGM2008 model to degree 2190 with the corrections for the topograohy calculated from the SRTM data. The GGMplus and EGM2008 models are compared with the regional geoid models in 21 regions of North America, Australia, Africa, and Europe. The obtained estimates largely support the possibility of refining the global geopotential models such as EGM2008 by the procedure implemented in GGMplus, particularly in the regions with relatively high elevation difference. |
| Databáze: | OpenAIRE |
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