The Theory Study on Search for Unusual Underground Objects with PCM
He Zhang · Tance yu kongzhi xuebao · 2002
The precise geomagnetic PCM is used to detect the change of geomagnetism at different altitudes, so something such as void, bomb, and other objects underground at different altitudes can be find. The search theory, the constitution of the detecting system, and the data analysis are given. This method can be used to detect the void under highway base and to find the bomb underground at proving ground.