<span style="font-family:Verdana;">The determination of geoid models with great precision (centimeter) was always at the center of interest in geodesy research [<a href="#ref1">1</a&...<span style="font-family:Verdana;">The determination of geoid models with great precision (centimeter) was always at the center of interest in geodesy research [<a href="#ref1">1</a>] [<a href="#ref2">2</a>]. One of the most used methods to calculate the geoid model is the method called Remove-Compute-Restore (R-C-R). This method applies the stokes’ integral formula by the use of short, medium and long wavelength information via the three main stages R-C-R. The GravSoft software implemented by [<a href="#ref3">3</a>] was used for this study. Geodetic heights, a digital terrain model (SRTM) and leveled GPS points were used as inputs. The geoid modeling was carried out on the North region of Tunisia (Grand Tunis and Bizerte) on an area of 83 × 83 km. The accuracy of the quasi-geoid provisional reached 3.1 cm.</span>展开更多
Based on results of the mobile gravity measurements of the Crustal Movement Observation Network of China and Digital Earthquake Observation Network of China, this paper shows the pattern of temporal gravity changes in...Based on results of the mobile gravity measurements of the Crustal Movement Observation Network of China and Digital Earthquake Observation Network of China, this paper shows the pattern of temporal gravity changes in China mainland on a time scale of 2 - 3 years since 1998, and gives an analysis of the patterns. The result shows that the temporal gravity changes basically reflect the current mass movement and occurrence of strong earthquakes.展开更多
文摘<span style="font-family:Verdana;">The determination of geoid models with great precision (centimeter) was always at the center of interest in geodesy research [<a href="#ref1">1</a>] [<a href="#ref2">2</a>]. One of the most used methods to calculate the geoid model is the method called Remove-Compute-Restore (R-C-R). This method applies the stokes’ integral formula by the use of short, medium and long wavelength information via the three main stages R-C-R. The GravSoft software implemented by [<a href="#ref3">3</a>] was used for this study. Geodetic heights, a digital terrain model (SRTM) and leveled GPS points were used as inputs. The geoid modeling was carried out on the North region of Tunisia (Grand Tunis and Bizerte) on an area of 83 × 83 km. The accuracy of the quasi-geoid provisional reached 3.1 cm.</span>
基金supported by the National Natural Science Fundation(40374031)Special Project in the Study of Earthquake(2008419057)the National"Eleventh Five Years"Scientific and Technological Plan(2006BAC01B02-02-04)
文摘Based on results of the mobile gravity measurements of the Crustal Movement Observation Network of China and Digital Earthquake Observation Network of China, this paper shows the pattern of temporal gravity changes in China mainland on a time scale of 2 - 3 years since 1998, and gives an analysis of the patterns. The result shows that the temporal gravity changes basically reflect the current mass movement and occurrence of strong earthquakes.
