地下无线电波勘探已有多年的历史了，但其资料的处理解释大多采用定性的方法。如“阴影交会法”就是广泛被采用的一种。在电波绕射现象不太严重的情况下，可以利用它大致定出异常体的位置；在某些有利情况下，还可估计异常体的大小。但这种粗略的定性方法有其缺点，就是它没有关于异常体及其周围 Underground radio waves have been under exploration for many years, but most of the explanation for the processing of their data uses qualitative methods. Such as “shadow law of intersection” is widely used one. In the case of less severe radio-wave diffraction, it can be used to roughly determine the location of the anomalous body; in some favorable cases, the size of the anomalous body can also be estimated. But this rough qualitative method has the disadvantage that it does not have anything about the anomaly and its surroundings