【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.更多还原

【Abstract】 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.更多还原