根据重、磁异常来计算其各阶导数,分别可以在空间域和频率域进行。为了选择更合适的导数算法,本文利用空间域的差商法、曲面拟合法和垂向二阶导数常用公式,以及频率域的FFT计算方法,在不同的情况下来研究对比这几种方法的精度。完成FORTRAN程序编制,并进行大量模型试算,总结各种算法优缺点和适用情况。 According to heavy and magnetic anomalies to calculate the various derivatives, respectively, in the spatial domain and frequency domain. In order to choose a more suitable derivative algorithm, this article uses the differential domain method in space, the surface fitting method and the vertical second derivative of the formula, as well as the FFT calculation of the frequency domain, in different circumstances to study the accuracy of these methods. Complete FORTRAN programming, and a large number of model trial calculations, summarizes the advantages and disadvantages of various algorithms and applicable situations.