Geocenter location and variations in earth orientation using Global Positioning System measurements
| Autor: | S. M. Lichten, S. C. Wu, R. P. Malla |
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| Rok vydání: | 1993 |
| Předmět: |
Atmospheric Science
Soil Science Aquatic Science Oceanography Physics::Geophysics Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Water Science and Technology Earth's rotation Remote sensing Analysis of covariance Earth Orientation Parameters Ecology business.industry Satellite laser ranging Paleontology Forestry Covariance Geodesy Geophysics Space and Planetary Science Temporal resolution Physics::Space Physics Global Positioning System Ocean tide Astrophysics::Earth and Planetary Astrophysics business Geology |
| Zdroj: | Journal of Geophysical Research: Solid Earth. 98:4611-4617 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/92jb02588 |
| Popis: | We have studied the use of GPS ground and flight tracking data to measure short-period earth orientation variations and changes in geocenter location. Comparisons between GPS-estimated earth rotation variations and those calculated from ocean tide models suggest that observed subdaily variations in earth rotation are dominated by oceanic tidal effects. Our preliminary GPS estimates for geocenter location agree with an independent satellite laser ranging estimates to 10-15 cm. Covariance analysis predicts that temporal resolution of GPS estimates for earth orientation and geocenter improves significantly when data collected from low earth-orbiting satellites as well as from ground sites are combined. The low-earth GPS tracking data enhance the accuracy and resolution for measuring high-frequency global geodynamical signals over time scales less than 1 day. |
| Databáze: | OpenAIRE |
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