Jung, Ji-Hyun Kim, Se-Yun 2024-01-19T12:09:59Z 2024-01-19T12:09:59Z 2022-03-07 2013 https://pubs.kist.re.kr/handle/201004/115447 The effect of the water collected in the bottom of an empty tunnel on cross-borehole radar signatures is analyzed using the finite-difference time-domain (FDTD) method. The cross-borehole pulse radar is represented by 3-dimensional model and B-scan images are calculated in two cases of fully air-filled and half water-filled tunnels. The first positive peak in the B-scan image appears in a later time and moves upward direction than the tunnel center as the water is collected in tunnel. To estimate the central position of the half water-filled tunnel, the first negative peak is adopted here and its utility is described clearly. English IEEE Analysis of Cross-Borehole Pulse Radar Signatures on a Half Water-Filled Tunnel Conference 1 3rd Asia-Pacific Microwave Conference Proceedings (APMC), pp.473 - 475 3rd Asia-Pacific Microwave Conference Proceedings (APMC) 473 475 US Seoul, SOUTH KOREA 2013-11-05 2013 ASIA-PACIFIC MICROWAVE CONFERENCE PROCEEDINGS (APMC 2013) 000330851900154 2-s2.0-84893390661 Proceedings Paper