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- W2024661657 abstract "Ground surface roughness is problematic when using a radar impulse to detect and locate land mines. Waves scatter from a random rough ground surface in unpredictable ways, contributing to clutter that is particularly hard to suppress. This clutter has proven experimentally and computationally to distort and obscure the desired scattered field from a buried target. To overcome this effect we have developed a lightweight, artificial dielectric that can be placed over a chosen area that will mimic flat ground and mitigate clutter effects. An artificial dielectric of close-packed array of small insulated metal-coated plastic spheres and lossless uniform plastic spheres can be formulated to match the dielectric properties soil. The ratio of these two spheres in the collection is adjusted to match a particular soil type and the moisture content. Placing them in a conformable bag and ensuring a flat upper interface with the air, ground reflections from an impulse radar can effectively be removed to reveal a target scattering signature. Furthermore, a matched filter can be used to distinguish between a landmine and a false alarm (such as a rock) The artificial dielectric was matched by running experiments in the frequency and time domains. A 1 GHz center frequency impulse ground penetrating radar was used to collect time signals and compare different cases: flat ground, rough ground and rough ground with artificial dielectric. Results indicate excellent rough surface reflection removal and target signal enhancement." @default.
- W2024661657 created "2016-06-24" @default.
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- W2024661657 date "2002-08-12" @default.
- W2024661657 modified "2023-09-23" @default.
- W2024661657 title "<title>Mitigating ground clutter effects for mine detection with lightweight artificial dielectrics</title>" @default.
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- W2024661657 doi "https://doi.org/10.1117/12.479097" @default.
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