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	\section{Introduction}
	\label{sec:introduction}
	\IEEEPARstart{R}{ecently} the problem of electromagnetic wave scattering by precipitation has been of increasing interest in many applications including remote sensing systems, wireless communication and modeling radio links \cite{b1,b6}.
	
	
	
	\begin{thebibliography}{00}
		
		\bibitem{b1} R. Crane, ''Attenuation due to rain – A mini-review'', \emph{IEEE Trans. Antennas Propagat}., vol. 23, no. 5, pp. 750–752, 1975.
		
		\bibitem{b2} D. Hogg and T. Chu, ''The role of rain in satellite communications'', \emph{Proc. IEEE}., vol. 63, no. 9, pp. 1308–1331, 1975.
		
		\bibitem{b3} R.L. Olsen, ''A review of theories of coherent radio wave propagation through precipitation media of randomly oriented scatters and the role of multiple scattering'', \emph{Radio Sci.}, vol. 17, no. 5, pp. 913–928, 1982.
		
		\bibitem{b4} A. Ishimaru, ''Theory and application of wave propagation and scattering in random media'', \emph{Proc. IEEE}., vol. 65, no. 7, pp. 1030–1061, 1977.
		
		\bibitem{b5} T. Oguchi, ''Electromagnetic wave propagation and scattering in rain and other hydrometeors'', \emph{Proc. IEEE}., vol. 71, no. 9, pp. 1029-1078, 1983.
		
		\bibitem{b6} D. P. Lin and H. Y. Chen, ``An empirical formula for the prediction of rain attenuation in frequency range 0.6-100 GHz'', \emph{IEEE Trans. Antennas Propagat}., vol. 50, no. 4, pp. 545--551, Apr. 2002.
		
	\end{thebibliography}
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