Three-Dimensional Reverse Time Migration of Ground-Penetrating Radar Signals

摘要: Three-dimensional (3D) ground-penetrating radar (GPR) systems and 3D seismic imaging techniques have been developing fast evolving rapidly in the last decade. Ray-based migration methods successfully applied to processing GPR signals based on similarity between electromagnetic waves. However, reverse time (RTM) of has not well studied past. In this paper, we present a RTM Maxwell’s equations for surveys. Migration recovers true subsurface structure from distorted unfocused profile suppresses common clutter noise. can consider conductivity directly compensate attenuation within high-conductivity zone. Compared with 2D RTM, back-propagates both in-line cross-line simultaneously include complex permittivity models. We integrated parallel finite-difference time-domain (FDTD) algorithm hybrid MPI OpenMP scheme reduce computational cost problems. The experiments an anomaly “EM” shape realistic sand dune model demonstrate effective recovery structures.