激光气象雷达多次后向散射信号特性分析  

Characteristic of Multiply Backscattered Signal of Meteorological Lidar

作　　者：王春晖[1] 张建[1] 李明卓[1] 王骐[1] 

机构地区：[1]哈尔滨工业大学光电子技术研究所可调谐激光技术国家级重点实验室,哈尔滨150001

出　　处：《光子学报》2007年第10期1881-1883,共3页Acta Photonica Sinica

基　　金：国家自然科学基金(60577032)资助

摘　　要：利用小角近似方法,分别给出了单次和多次后向散射激光雷达方程.通过引入的多次散射评价参量,分析了接收视场角和光学厚度等因素对多次后向散射信号的影响.理论研究表明:多次后向散射主要与接收视场角和光学厚度密切相关,当接收视场角比发射视场角大10倍,光学厚度超过3时,多次后向散射信号逐渐增大并占主要优势,当接收视场角比发射视场角大100倍时,光学厚度超过1时,多次后向散射信号开始明显增强.Single and multiple backscattering lidar equations under the small angle approximation are presented. The effect of receiver field-of-view,optical thickness and other factors on multiple backscattering is analyzed by introducing a multiple scattering evaluation factor. Theoretical studies show that multiple scattering mainly depends on receiver field-of-view and optical thickness. When the receiver field-of-view is 10 times more than the transmitter the field-of-view, and the optical thickness is over 3, multiply backscattered signal gradually increases and becomes dominant. When the receiver field-of-view is 100 times more than the transmitter field-of-view, and the optical thickness is over 1, the multiply backscattered signal begins to dramatically increase.

关 键 词：激光雷达 后向散射激光雷达方程 单次后向散射 多次后向散射 

分 类 号：TN958.98[电子电信—信号与信息处理]