標題: Inverse Vening Meinesz formula and deflection-geoid formula: applications to the predictions of gravity and geoid over the South China Sea
作者: Hwang, C
土木工程學系
Department of Civil Engineering
關鍵字: deflection-geoid formula;gravity anomaly;Inverse Vening Meinesz formula;satellite altimetry;South China Sea
公開日期: 1-五月-1998
摘要: Using the spherical harmonic representations of the earth's disturbing potential and its functionals, we derive the inverse Vening Meinesz formula, which converts deflection of the vertical to gravity anomaly using the gradient of the H function. The deflection-geoid formula is also derived that converts deflection to geoidal undulation using the gradient of the C function. The two formulae are implemented by the 1D FFT and the 2D FFT methods. The innermost zone effect is derived. The inverse Vening Meinesz formula is employed to compute gravity anomalies and geoidal undulations over the South China Sea using deflections from Seasat, Geosat, ERS-1 and TOPEX//POSEIDON satellite altimetry. The 1D FFT yields the best result of 9.9-mgal rms difference with the shipborne gravity anomalies. Using the simulated deflections from EGM96, the deflection-geoid formula yields a 4-cm rms difference with the EGM96-generated geoid. The predicted gravity anomalies and geoidal undulations can be used to study the tectonic structure and the ocean circulations of the South China Sea.
URI: http://dx.doi.org/10.1007/s001900050169
http://hdl.handle.net/11536/32633
ISSN: 0949-7714
DOI: 10.1007/s001900050169
期刊: JOURNAL OF GEODESY
Volume: 72
Issue: 5
起始頁: 304
結束頁: 312
顯示於類別:期刊論文


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