基于Guptasarma汉克尔变换的频率域航空电磁特征

在实际工作中，通常认为直升机频率域电磁系统最大勘探深度为150m，但这些都是根据实际的勘查经验得出的，没有统一的标准。本文运用均匀半空间模型，对比了Anderson和Guptasarma汉克尔变换方法，说明Guptasarma方法更优，并基于Guptasarma汉克尔变换方法，推导了不同装置的频率域电磁响应的理论公式，计算了不同装置的频率域电磁响应特征，认为不同装置的直升机频率域电磁系统，探测深度不同，提出对于不同产状的地质体，运用不同的装置进行探测，并给出了不同装置的频率域电磁系统的理论探测深度，具有一定的理论意义。

Airborne Electromagnetic Characteristics of Frequency Domain Based on Guptasarma Hankel Transform

It is usually considered that the biggest prospecting depth is 150 m in practical survey, but this standard has been merely derived from the practical prospecting experience and cannot be regarded as a unanimously--adopted standard. In this paper, a homogeneous half-space model is used to compare the transformation methods between the Anderson and Guptasarma Hank so as to explain the Guptasarma method is much better. And based on Guptasarma Hank transformation method, a theoretical formula of frequency domain EM response is derived from different devices and the feature of frequency domain EM response from different devices is calculated. The result shows that the detecting depth of the helicopter frequency domain EM system from different devices is different. Thus this paper points out that different devices are used to detect the geological body of different occurrences. Finally, the detection depth for the frequency domain EM system of different devices is proposed.