Analysis of Cross-Borehole Pulse Radar Signatures on a Terminated Tunnel With Various Penetration Lengths
作者： Jae-Hyoung Cho , Ji-Hyun Jung , Se-Yun Kim
DOI: 10.1109/TGRS.2017.2754946
关键词:
摘要: A cross-borehole pulse radar system was operated to detect an intrusive man-made tunnel terminated just 1.2 m away from the line of sight between a newly drilled borehole pair at test site. Unlike conventional signatures on fully penetrated air-filled tunnel, relatively fast arrival in measured time-of-arrival (TOA) profile highly suppressed depth tunnel. To analyze TOA contraction without drilling additional pairs, finite-difference time-domain (FDTD) simulator is implemented using accurately location information and pair. The relation curves time advance penetration length are plotted high low limits electrical properties background rock. verify accuracy our FDTD simulated results, wideband complex permittivity profiles core rock samples’ boring site open-ended coaxial probe method. calculated advances agree well with values both cases closely pairs presented for various lengths will be valuable guideline detection
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