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Ray tracing/correlation approach to estimation of surface-based duct parameters from radar clutter |
Zhao Xiao-Feng(赵小峰), Huang Si-Xun(黄思训)†, and Sheng Zheng(盛峥) |
Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China |
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Abstract This paper describes a technique to estimate surface-based duct parameters by using a simple ray tracing/correlation method. The approach is novel in that it incorporates the Spearman rank-order correlation scheme between the observed surface clutter and the surface ray density for a given propagation path. The simulation results and the real data results both demonstrate the ability of this method to estimate surface-based duct parameters. Compared with the results obtained by a modified genetic algorithm combined with the parabolic wave equation, the results retrieved from the ray tracing/correlation scheme show a minor reduction in accuracy but a great improvement on computation time. Therefore the ray tracing/correlation method might be used as a precursor to more sophisticated and slower techniques, such as genetic algorithm and particle filters, by narrowing the parameter search space and providing a comprehensive and more efficient estimation algorithm.
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Received: 01 June 2009
Revised: 03 September 2009
Accepted manuscript online:
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PACS:
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93.85.-q
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(Instruments and techniques for geophysical research: Exploration geophysics)
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92.60.Ta
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(Electromagnetic wave propagation)
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42.68.Ay
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(Propagation, transmission, attenuation, and radiative transfer)
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42.15.Dp
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(Wave fronts and ray tracing)
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Fund: Project supported by the National
Natural Science Foundation of China (Grant No.~40775025). |
Cite this article:
Zhao Xiao-Feng(赵小峰), Huang Si-Xun(黄思训), and Sheng Zheng(盛峥) Ray tracing/correlation approach to estimation of surface-based duct parameters from radar clutter 2010 Chin. Phys. B 19 049201
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