Three Dimensional Finite-Difference Seismic Signal Propagation
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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Moving tracked vehicles excite large-amplitude seismic surface waves that can be used to track and identify them at ranges over 1 km. Furthermore, these surface waves generally possess robust spatial coherence, show a smooth amplitude decay as a function vehicle range, and are minimally affected by severe meteorological conditions. Because of these properties, seismic signals should be used to augment acoustic sensing in battlefield systems. However, large changes in vehicle signature characteristics can be produced by geological variations. The heightened interest in using seismic signals for battlefield applications has created a need to understand the complex effects produced by the ground on propagating seismic surface waves. High fidelity forward modeling can be used to both explain these effects and to provide raw data for system development. Using synthetic data in this manner can reduce system development time and overall costs, while simultaneously improving system performance.
- Seismic Detection and Detectors