Abstract: Basing upon the even function (the cosine series) in this paper is introduced a method including the total field reduced to the pole and its second derivative and the continuation for numerical processing of aeromagnetic data. The method presented here is much more accurate than that of the Fourier method, while the boundary effect is depressed to a certain degree. In addition, an example utilizing the method also shows it to be useful for the exploration of mineral deposits and study of geologic structures of the deep-seated crust. Finally, the computer program of the method is presented. By combining the Fast Fourier Transforms (FFT) with the recurrence process applied in the program, the computation time is shortened and the amount of data is less restricted.

摘要： 本文通过实例对航磁资料进行垂直换算、垂直二阶导数和延拓计算的数字处理方法作了介绍。本方法以偶函数(cos级数)为基础,比一般富氏级数方法提高了计算精度,并改进了边界效应。文章最后给出的计算程序是采用了快速富氏变换算法和递推算法相结合,不但计算速度快,而且对计算点数也没有严格限制。这一计算方法对于找矿、地质构造与深部地壳分析都是十分有用的。