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Ground-penetrating radar velocity tomography in heterogeneous and anisotropic media

Don W. Vasco, John E. Peterson and Ki Ha Lee
Ground-penetrating radar velocity tomography in heterogeneous and anisotropic media
Geophysics (December 1997) 62 (6): 1758-1773

Abstract

A ray series solution for Maxwell's equations provides an efficient numerical technique for calculating wavefronts and raypaths associated with electromagnetic waves in anisotropic media. Using this methodology and assuming weak anisotropy, we show that a perturbation of the anisotropic structure may be related linearly to a variation in the traveltime of an electromagnetic wave. Thus, it is possible to infer lateral variations in the dielectric permittivity and magnetic permeability matrices. The perturbation approach is used to analyze a series of crosswell ground-penetrating radar surveys conducted at the Idaho National Engineering Laboratory. Several important geological features are imaged, including a rubble zone at the interface between two basalt flows. Linear low-velocity anomalies are imaged clearly and are continuous across well pairs.


ISSN: 0016-8033
EISSN: 1942-2156
Coden: GPYSA7
Serial Title: Geophysics
Serial Volume: 62
Serial Issue: 6
Title: Ground-penetrating radar velocity tomography in heterogeneous and anisotropic media
Affiliation: Berkeley Laboratory, Center for Computational Seismology, Berkeley, CA, United States
Pages: 1758-1773
Published: 199712
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 16
Accession Number: 1998-009329
Categories: Applied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 199804
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