利用研制的探测大气二氧化碳廓线的振动拉曼激光雷达系统采集的氮气分子振动拉曼散射信号,结合激光雷达探测时的大气消光数据,反演求出激光雷达的几何因子曲线。并对气溶胶波长指数变化对振动拉曼信号反演几何因子造成的影响进行分析与估算。气溶胶消光波长指数变化对振动拉曼散射信号反演几何因子会带来较大的误差影响。当气溶胶消光波长指数或其谱分布确定时,振动拉曼散射信号反演几何因子具有简便、可靠等优点,在振动拉曼激光雷达系统几何因子确定中可以充分应用此方法。

Combined with the atmosphere extinction data when the lidar was operated,N2 vibrational Raman scattering signals of detecting atmosphere CO2 Raman lidar system were used to determine the lidar geometric form factor,and analyze and estimate the influence of aerosol wavelength exponent changes on geometric form factor determination. The results show that the aerosol wavelength exponent would have influenced the determination of geometric form factor with vibrational Raman signals. When the aerosol wavelength exponent was determined by other experiments,determination of geometric form factor for Ramon lidar with vibrational Raman scattering signals is simple,convenient and credible.