%0 Journal Article
%T The interpolation-iteration method for potential field continuation from undulating surface to plane<br>位场曲化平的插值-迭代法
%A XU Shi-Zhe
%A YU Hai-Long
%A <br>徐世浙
%A 余海龙
%J 地球物理学报
%D 2007
%I 
%X The interpolation-iteration procedure of downward continuation from the undulating surface B to the horizontal plane A that below the lowest point of B is:(1) choose the initial potential field value at each point on the plane A as the observed one on the surface B at the point with the same horizontal coordinates;(2) intersect the surface B with several planes and obtain the field values on these planes by upward continuing the fields on A using the FFT technique,then the fields on the surface B can be interpolated from the fields on these planes;(3) the new field values on A are then obtained by adding the initial values and the weighted difference between the observed and the calculated field values on B;(4) repeat steps(2) and(3) until the difference becomes negligible.The interpolation-iterative continuation method possesses a higher computation speed and can stably downward continue data to a much deeper depth than using standard FFT techniques,up a depth equal to more than 10 times the grid interval.A test example for real survey data is given.
%K Potential field
%K Downward continuation
%K Interpolation
%K Iteration
%K FFT
%K Magnetic anomaly<br>位场
%K 向下延拓
%K 插值
%K 迭代
%K FFT
%K 磁异常
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=EA4399EF7459437BBA5E20806FE953FB&yid=A732AF04DDA03BB3&vid=771152D1ADC1C0EB&iid=B31275AF3241DB2D&sid=EF31684301C70518&eid=640095552C3FE899&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=10&reference_num=8