Ray tracing/correlation approach to estimation of surface-based duct parameters from radar clutter |
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| Authors: | Zhao Xiao-Feng Huang Si-Xun and Sheng Zheng |
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| Affiliation: | 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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| Keywords: | ray tracing Spearman rank correlation surface-based
duct radar clutter |
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