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使用Guptasarma和Singh(1997)提出的61/47和120/140两套线性滤波系数,对CSAMT法一维正演中电磁场各分量的汉克尔积分进行求解,其中120/140线性滤波系数是首次应用于可控源音频大地电磁法正演计算。使用这两套滤波系数对几种常见的地电模型进行正演计算,模拟结果表明多层模型下二者都可以取得良好的计算精度和计算速度,但是在较简单的两层模型下两套滤波系数方案有较大区别,同时说明在数值模拟中通过加长滤波系数并不总是会获得好的结果。
The Hankel integrals of each component of electromagnetic field in the one-dimensional forward modeling by CSAMT method are solved by using two sets of linear filter coefficients 61/47 and 120/140 proposed by Guptasarma and Singh (1997). The 120/140 linear filter coefficient is the first time Applied to controllable source of audio frequency electromagnetic method forward calculation. Using these two filter coefficients, several common geoelectric models are forward-calculated. The simulation results show that both of them can obtain good calculation precision and calculation speed under the two-layer model, but under the simple two-layer model The filter coefficient scheme is quite different and shows that good results are not always obtained by lengthening the filter coefficients in the numerical simulation.