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《Chinese Journal of Geophysics》 2005-01
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Downward continuation of gravity signals based on the multiscale edge constraint

NING Jin-Sheng 1, 2, WANG Hai-Hong2, LUO Zhi-Cai 1, 2 1 Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan 430079, China 2 School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China  
A new method to stabilize downward continuation of gravity signals is studied in this paper. The principle of multiscale edge detection by wavelets is presented firstly, and the multiscale edges of the earth's gravity field are analyzed with the EGM96 model as an example. Based on the constraint of the multiscale edge, a method for the downward continuation is proposed and a simulation example is given. The result indicates that it is feasible to enhance the stability of downward continuation using the multiscale edge as a constraint. This method has a better effect in the case when the signal-to-noise ratio of observations is low.
【Fund】: 国家自然科学基金项目 (4 0 0 740 0 5 );; 地球空间环境与大地测量教育部重点实验室开放研究基金项目 (0 3 0 4 12 )资助
【CateGory Index】: P223
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