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Underground tomogram from cross‐borehole measurements
Author(s) -
Park SeongKil,
Choi HongKi,
Ra JungWoong
Publication year - 1998
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19980820)18:6<402::aid-mop11>3.0.co;2-0
Subject(s) - borehole , offset (computer science) , tomography , amplitude , geology , microwave , permittivity , acoustics , radar , microwave imaging , diffraction tomography , optics , physics , dielectric , engineering , electrical engineering , geotechnical engineering , telecommunications , computer science , programming language
Cross‐borehole multifrequency continuous‐wave radar measures the amplitudes and phases of the transmitted fields. This makes it possible to calculate the permittivity and conductivity averaged along the line connecting two receiving antennas with the transmitting antenna in the boreholes. Backprojections of these line‐averaged parameters in the parallel and offset measurements give stable and smooth tomograms of subsurface permittivities and conductivities, except for isolated high‐contrast objects such as the air tunnel. © 1998 John Wiley & Sons, Inc. Microwave Opt Technol Lett 18: 402–406, 1998.