摘要
本文讨论了频率测深电偶源发射时水平磁场的正演计算问题,所用方法为快速汉克尔变换法。该方法的基本思路是:引入适当的变量替换,将汉克尔积分变为褶积形式,通过抽样再将其离散化为数字滤波形式,这样就可应用快速汉克尔变换滤波方法进行计算。本文讨论了方法的基本原理、计算电偶源发射时水平磁场滤波系数的选取、精度问题,并且讨论了利用电磁场之间的比值定义的视电阻率响应的正演计算问题,给出了一些计算实例。
The calculation of horizontal magnetic field of E. Mo sounding transmitted by a dipole is discussed in this paper. The method used is called Fast Hankel Transform. The main idea of the method is that Hankel integral can be changed into the form of convolution by a proper transform of variable and into the form of numerical filtering so as to bc calculated by Fast Hankel Transform. The principle of the method, the choice of the coefficients used to calculate horizontal magnetic field and the precision arc discussed here, and the calculation of response of apparent resistivity defined by the ratio of electromagnetic fields is discussed, too. Some results of calculation have been given also.
出处
《物探化探计算技术》
CAS
CSCD
1989年第3期204-213,共10页
Computing Techniques For Geophysical and Geochemical Exploration
