Kim, Sang-Wook Kim, Se-Yun Nam, Sangwook 2024-01-20T17:03:15Z 2024-01-20T17:03:15Z 2021-09-02 2011-05 1545-598X https://pubs.kist.re.kr/handle/201004/130381 The pulse signatures of a deeply located dormant tunnel are measured by operating cross-borehole short-pulse radar in a well-suited tunnel test site in Korea. The relatively fast arrival of the first peak at depth of the empty tunnel, as indicated by data analysis, may play a key role in detecting the tunnel's precise location. Following short-time Fourier transform (STFT) of the data, the arrival time of the first peak is shown to be faster and more distinctive than that without STFT if the observation frequency is properly selected. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC Short-Time Fourier Transform of Deeply Located Tunnel Signatures Measured by Cross-Borehole Pulse Radar Article 10.1109/LGRS.2010.2089039 1 IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, v.8, no.3, pp.493 - 496 IEEE GEOSCIENCE AND REMOTE SENSING LETTERS 8 3 493 496 scie scopus 000289899000022 2-s2.0-79955522998 Geochemistry & Geophysics Engineering, Electrical & Electronic Remote Sensing Imaging Science & Photographic Technology Geochemistry & Geophysics Engineering Remote Sensing Imaging Science & Photographic Technology Article Air cavity cross-hole radar pulse radar short-time Fourier transform (STFT) underground tunnel