%0 Journal Article
%T Downward continuation of gravity signals based on the multiscale edge constraint<br>基于多尺度边缘约束的重力场信号的向下延拓
%A NING Jin-Sheng
%A WANG Hai-Hong
%A LUO Zhi-Cai
%A Key Laboratory of Geospace Environment
%A Geodesy
%A Ministry of Education
%A Wuhan
%A China School of Geodesy
%A Geomatics
%A Wuhan University
%A Wuhan
%A China
%A <br>宁津生
%A 汪海洪
%A 罗志才
%J 地球物理学报
%D 2005
%I 
%X 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.
%K Downward continuation
%K Gravity field
%K Multiscale edge
%K Wavelet analysis<br>向下延拓
%K 重力场
%K 多尺度边缘
%K 小波分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=BD877C8DED0556A6&yid=2DD7160C83D0ACED&vid=B6DA1AC076E37400&iid=CA4FD0336C81A37A&sid=E84BBBDDD74F497C&eid=68D88C2FCF9C3098&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=22&reference_num=17