介绍了采用米散射激光雷达测量湍流信息的理论原理,分析了现有AML-2米散射激光雷达 进行实验探测的可行性,并于2009年3月15日在水平方向上开展了初步实验。从回波信号曲线及 数据分析结果来看, AML-2激光雷达探测湍流的有效距离为300～820 m;归一化光强起伏 方差即闪烁指数数值在0.001～0.1之间,且随距离增加而不断增大,闪烁饱和现象不太明显; 大气折射率结构常数数值基本在1.0×10-15m-2/3左右,在水平方向上基本 保持均匀性。总体上,闪烁指数和折射率结构常数随路径的变化趋势多数符合理论结果。

A theory of measuring turbulence information using Mie scattering lidar is introduced. The feasibility of measuring turbulence with existing AML-2 Mie scattering lidar is analyzed and some experiments are performed in the horizontal direction on March 15, 2009. The echo signal curve and results of data analysis show that, the effective range of measuring turbulence with AML-2 Mie scattering lidar is about 300～820 m. The value of normalized variance of the irradiance fluctuations, called scintillation index, is between 0.001 and 0.1. It increases with the increment of propagation distance, and the phenomenon of scintillation saturation is not obvious. The value of atmospheric refractive index structure constant is about 1.0×10-15m-2/3, and basically maintains homogenous in the horizontal direction. On the whole, the tendencies of scintillation index and refractive index structure constant with propagation distance are almost similar to the theoretical results.