湍流大气中漫射目标光散射特性研究

LIGHT SCATTERING FROM A DIFFUSE TARGET IN THE TURBULENT ATMOSPHERE

利用广义惠更斯-菲涅尔原理,研究了考虑对数振幅起伏时大气湍流中的漫射目标的散射统计特性,导出了散射场的强度协方差函数和强度方差的计算公式,并给出了数值计算结果。讨论了不同湍流强度、波长和传播距离对强度协方差函数和归一化强度方差的影响。

The extended Huygens-Fresnel principle is utilized to make analysis of scattering characteristics of diffuse targets in the turbulent atmosphere with considering the fluctuation of the log-amplitude, the covariance function and variance of the scattering intensity are derived in detail, and the numerical results are given. The influence of turbulence strength, wavelength and propagating distance on the covariance function and normalized variance of the scattering intensity is discussed.