Enhancement of Cross-Borehole Pulse Radar Signature on a Partially Water-Filled Tunnel
Joint Authors
Source
International Journal of Antennas and Propagation
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-12-16
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Cross-borehole pulse radar has been employed to detect a deeply located empty tunnel.
In this paper, effects of underground water collected in the bottom of an empty tunnel on cross-borehole pulse radar signatures are analyzed numerically.
B-scan images, stacks of received pulses, are calculated by applying the finite-difference time-domain (FDTD) method for 6 different heights of water from the bottom to the half height inside an empty tunnel.
The most important features of an empty tunnel, the fastest time of peak (TOP) and time of arrival (TOA) extracted from the B-scan images, are slowed considerably depending on the increased height of water inside the tunnel.
To compensate the weak TOP like that of an empty tunnel, a relation curve is formulated only utilizing measurable parameters of the fastest TOP and the fastest TOA.
Then, a unified curve including the effects of two granites with the low and high dielectric properties is derived to cover widely varied dielectric properties of underground rocks.
Based on the fastest TOP of an empty tunnel, the average difference between the fastest TOP of an empty tunnel and that of a partially water-filled tunnel decreases from 22.92% to 2.59% after enhancement.
American Psychological Association (APA)
Jung, Ji-Hyun& Kim, Se-Yun. 2014. Enhancement of Cross-Borehole Pulse Radar Signature on a Partially Water-Filled Tunnel. International Journal of Antennas and Propagation،Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-1036066
Modern Language Association (MLA)
Jung, Ji-Hyun& Kim, Se-Yun. Enhancement of Cross-Borehole Pulse Radar Signature on a Partially Water-Filled Tunnel. International Journal of Antennas and Propagation No. 2014 (2014), pp.1-9.
https://search.emarefa.net/detail/BIM-1036066
American Medical Association (AMA)
Jung, Ji-Hyun& Kim, Se-Yun. Enhancement of Cross-Borehole Pulse Radar Signature on a Partially Water-Filled Tunnel. International Journal of Antennas and Propagation. 2014. Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-1036066
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1036066