Volume 37 Issue 2
Feb.  2011
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Li Xiaofei, Xu Xiaojian. Modeling of complex reflection coefficient for time-evolving sea surfaces[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011, 37(2): 197-201. (in Chinese)
Citation: Li Xiaofei, Xu Xiaojian. Modeling of complex reflection coefficient for time-evolving sea surfaces[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011, 37(2): 197-201. (in Chinese)

Modeling of complex reflection coefficient for time-evolving sea surfaces

  • Received Date: 10 Dec 2009
  • Publish Date: 28 Feb 2011
  • Based on the two-dimensional time-varying sea surface model and first-order small slope approximation method, the time-varying and statistical characteristics of complex reflection coefficients from sea surfaces were investigated. In terms of electromagnetic scattering amplitudes, the reflection coefficients and their coherent and incoherent components were derived. The theoretical formula of coherent part is coincident with the empirical model. Simulation results demonstrate that the coherent amplitudes accord with the empirical counterparts, while the phases have unavoidable disturbances, which can not be predicted by empirical formula. Middleton phase difference statistical model was introduced to model the time-varying property of reflection coefficients. The simulated statistics are shown to be in good agreement with the theoretical model, and the contour plots of probability density function can predict the correlation between the complex reflection coefficients adequately. Such agreement suggests that the complex reflection coefficients have a Gaussian distribution on short time scales, but are modulated in amplitude and frequency by the long surface waves.

     

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  • [1] Shtager E A.An estimation of sea surface influence on radar reflectivity of ships [J].IEEE Transactions on Antennas and Propagation,1999,47(10): 1623-1627 [2] Xu X,Wang Y,Qin Y.SAR image modeling of ships over sea surface //SAR Image Analysis,Modeling and Techniques Ⅷ,Proc SPIE.Stockholm,Sweden: ,2006,V6363:1-12 [3] Beard C I.Coherent and incoherent scattering of microwaves from the ocean [J].IRE Transactions on Antennas and Propagation,1961,9(5): 470-483 [4] Voronvich A G.Waves scattering from rough surfaces [M].Berlin,Germany: Springer-Verlag,1994 [5] Bourlier C,Déchamps N,Berginc G.Comparison of asymptotic backscattering models (SSA,WCA,and LCA) from one-dimensional Gaussian ocean-like surfaces [J].IEEE Transactions on Antennas and Propagation,2005,53(5):1640-1652 [6] Middleton D.An introduction to statistical communications theory [M].New York: McGraw-Hill,1960 [7] Chapman R D,Gotwols B L,Sterner R E.On the statistics of the phase of microwave backscatter from the ocean surface [J].Journal of Geophysical Research,1994,99(8):16293-16302 [8] Toporkov J V,Brown G S.Numerical simulation of scattering from time-varying,randomly rough surfaces [J].IEEE Transactions on Geoscience Remote Sensing,2000,38(4):1616-1625 [9] Rino C L,Crystal T L,Koide A K,et al.Numerical simulation of backscattering from linear and nonlinear ocean surface realizations [J].Radio Science,1991,26(1): 51-71 [10] 金亚秋.电磁散射和热辐射的遥感理论[M].2版.北京:科学出版社,1998:61-63 Jin Y.Remote sensing theory of electromagnetic scattering and thermal emission [M].2nd ed.Beijing: Science Press,1998:61-63 (in Chinese) [11] Dawood M,Narayanan R M.Multipath and ground clutter analysis for a UWB noise radar [J].IEEE Transaction on Aerospace and Electronic System,2002,38(3):838-85
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