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Proceedings Paper

High-fidelity simulation capability for virtual testing of seismic and acoustic sensors
Author(s): D. Keith Wilson; Mark L. Moran; Stephen A. Ketcham; James Lacombe; Thomas S. Anderson; Neill P. Symons; David F. Aldridge; David H. Marlin; Sandra L. Collier; Vladimir E. Ostashev
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Paper Abstract

This paper describes development and application of a high-fidelity, seismic/acoustic simulation capability for battlefield sensors. The purpose is to provide simulated sensor data so realistic that they cannot be distinguished by experts from actual field data. This emerging capability provides rapid, low-cost trade studies of unattended ground sensor network configurations, data processing and fusion strategies, and signatures emitted by prototype vehicles. There are three essential components to the modeling: (1) detailed mechanical signature models for vehicles and walkers, (2) high-resolution characterization of the subsurface and atmospheric environments, and (3) state-of-the-art seismic/acoustic models for propagating moving-vehicle signatures through realistic, complex environments. With regard to the first of these components, dynamic models of wheeled and tracked vehicles have been developed to generate ground force inputs to seismic propagation models. Vehicle models range from simple, 2D representations to highly detailed, 3D representations of entire linked-track suspension systems. Similarly detailed models of acoustic emissions from vehicle engines are under development. The propagation calculations for both the seismics and acoustics are based on finite-difference, time-domain (FDTD) methodologies capable of handling complex environmental features such as heterogeneous geologies, urban structures, surface vegetation, and dynamic atmospheric turbulence. Any number of dynamic sources and virtual sensors may be incorporated into the FDTD model. The computational demands of 3D FDTD simulation over tactical distances require massively parallel computers. Several example calculations of seismic/acoustic wave propagation through complex atmospheric and terrain environments are shown.

Paper Details

Date Published: 27 May 2005
PDF: 12 pages
Proc. SPIE 5796, Unattended Ground Sensor Technologies and Applications VII, (27 May 2005); doi: 10.1117/12.603934
Show Author Affiliations
D. Keith Wilson, U.S. Army Engineer Research and Development Ctr. (United States)
Mark L. Moran, U.S. Army Engineer Research and Development Ctr. (United States)
Stephen A. Ketcham, U.S. Army Engineer Research and Development Ctr. (United States)
James Lacombe, U.S. Army Engineer Research and Development Ctr. (United States)
Thomas S. Anderson, U.S. Army Engineer Research and Development Ctr. (United States)
Neill P. Symons, Sandia National Labs. (United States)
David F. Aldridge, Sandia National Labs. (United States)
David H. Marlin, Army Research Lab. (United States)
Sandra L. Collier, Army Research Lab. (United States)
Vladimir E. Ostashev, National Oceanic and Atmospheric Administration (United States)
New Mexico State Univ. (United States)

Published in SPIE Proceedings Vol. 5796:
Unattended Ground Sensor Technologies and Applications VII
Edward M. Carapezza, Editor(s)

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