The exploding-reflector concept for ground-penetrating-radar modeling

J. M. Carcione, L. P. Feliciangeli, M. Zamparo

Abstract


The simulation of a stacked radargram requires the calculation of a set of common-source experiments and application of the standard processing sequence. To reduce computing time, a zero-offset stacked section can be obtained with a single simulation, by using the exploding-reflector concept and the so-called non-reflecting wave equation. This non-physical modification of the wave equation implies a constant impedance model to avoid multiple reflections, which are, in principle, absent from stacked sections and constitute unwanted artifacts in migration processes. Magnetic permeability is used as a free parameter to obtain a constant impedance model and avoid multiple reflections. The reflection strength is then implicit in the source strength. Moreover, the method generates normal-incidence reflections, i.e. those having identical downgoing and upgoing wave paths.Exploding reflector experiments provide correct travel times of diffraction and reflection events, in contrast to the plane-wave method.

Keywords


exploding reflector;zero-offset section;GPR modeling

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References


DOI: https://doi.org/10.4401/ag-3526
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X