Abstract
Ground‐penetrating radar (GPR) has been a very efficient tool for mapping shallow targets for applications such as those in geological engineering and environmental management (Fisher et al. 1992). Since the application of GPR depends on the complex electrical properties of the ground, it is important to study this dependence in all its manifestations. The depth of investigation for GPR applications depends strongly on the conductivity of the ground. If the ground is very conductive, GPR waves will be absorbed before they reach the target region. Earth materials can be dispersive, i.e., the conductivity and permittivity of rocks are frequency dependent (Levitskaya and Sternberg, 1994). This is especially true at high frequencies. GPR waves will also be absorbed in dispersive media. Hence modeling the GPR response in dispersive materials can reveal behaviors of importance in understanding field responses.
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