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《Acta Geodaetica Et Cartographic Sinica》 2001-01
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Inversion of Gravity Anomalies from Along-track Vertical Deflections with Satellite Altimeter Data and Its Applications

WANG Hai-ying, WANG Guang-yun (Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077,china)  
A new gravity recovery method with along-track vertical deflections is developed independently by authors on the basis of the Laplace's equation in Cartesian system. The method can be easily approached with 1D Hilbert transform and the along-track gravity anomalies can be derived directly from the along-track slopes of sea surface height (SSH). In other words, only along-track slope of SSH needs to be calculated other than two slopes of along-track and cross-track at crossover point. So the recovered along-track anomalies are almost the same as ship measurements along ship trajectory. The 2′×2′ gravity anomalies with an accuracy of 10×10 -5ms -2 (RMS) limited in South China Sea —— IGG-S are recovered from Geosat/GM, ERS-1/35day and TOPEX/Poseidon altimeter data using the method mentioned above. From the comparisons with external data sets of SIO, KMS and Hwang, respectively, it can be seen clearly that the accuracy of IGG-S is almost the same as them.
【Fund】: 国家自然科学基金! (4990 40 0 3 496 3414 0 ) ;; 国家海洋863项目! (818-0 6 -0 1-0 5 )
【CateGory Index】: P228
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