中国物理B ›› 2010, Vol. 19 ›› Issue (4): 49201-049201.doi: 10.1088/1674-1056/19/4/049201

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Ray tracing/correlation approach to estimation of surface-based duct parameters from radar clutter

赵小峰, 黄思训, 盛峥   

  1. Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China
  • 收稿日期:2009-06-01 修回日期:2009-09-03 出版日期:2010-04-15 发布日期:2010-04-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No.~40775025).

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)   

  1. Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China
  • Received:2009-06-01 Revised:2009-09-03 Online:2010-04-15 Published:2010-04-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No.~40775025).

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摘要： 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.

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.

Key words: ray tracing, Spearman rank correlation, surface-based duct, radar clutter

中图分类号:  (Instruments and techniques for geophysical research: Exploration geophysics)

  • 93.85.-q
92.60.Ta (Electromagnetic wave propagation) 42.68.Ay (Propagation, transmission, attenuation, and radiative transfer) 42.15.Dp (Wave fronts and ray tracing)