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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。
In this paper, digital processing methods of vertical conversion of aeromagnetic data, vertical second derivative and continuation calculation are introduced. Based on the even function (cos series), this method improves the calculation accuracy and improves the boundary effect than the general Fourier series method. Finally, the calculation program given in this paper is a combination of fast Fourier transform algorithm and recursive algorithm, which not only has high computational speed but also does not restrict the calculation of points. This calculation method is very useful for prospecting, geological structure and deep crustal analysis.