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为了检测地下洞穴,我们设计了一种基于100兆赫至1千兆赫频率范围内井间单色电磁波之间相互作用的地球物理方法。这种电磁层析成像方法的设计分三步:(1)基于积分方程法,利用“精确”理论计算人造数据,利用基本假设相当粗糙的层析成像算法对这些数据进行反演,然而结果表明,洞穴能得到很好的检测,其位置也得到估计;(2)用水箱中所有参数已知的缩小比例的物理模型求得数据,反演
To test the underground caverns, we devised a geophysical method based on the interaction between the well’s monochromatic electromagnetic waves in the 100 MHz to 1 GHz frequency range. The design of this electromagnetic tomography method is divided into three steps: (1) Artificial data is calculated using the “exact” theory based on the integral equation method, and the data are inverted using a tomographic imaging algorithm with a relatively rough basic assumption. However, , The cave can be well tested and its location also estimated; (2) The data are retrieved using a reduced physical model of all the known parameters in the tank, inverted