The necessity to detect tunnels that penetrate secure facilities such as detention centers, government offices, borders, or forward operating bases (FOBs) has developed from the need to deter or counter underground exploitation along the southern United States border, Iraq, and other facilities. The United States Army has been in the tunnel detection business for many years, to include providing support to other government agencies in locating tunnels along our southwest ...
A seismic/acoustic array was developed to detect activity in clandestine tunnels. The geologic setting of the area that encloses clandestine tunneling activity can preclude use of traditional tunnel-detection technologies such as ground-penetrating radar (GPR). Properties of the sediments at the study site are attributable to original environment of deposition and subsequent natural and human-caused modifications. The resulting lateral and vertical variability in critical soil properties confounded GPR and electromagnetic techniques, ...
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