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研究了高光谱分辨率激光雷达(HSRL)中光谱滤光器透射率参数对其反演大气气溶胶光学属性精度的影响。建立了一种基于普通三通道HSRL配置的、与光谱透射率参数有关的反演误差理论分析模型,并通过蒙特卡罗(MC)算法仿真验证了该误差分析理论模型的正确性。理论模型及MC仿真结果表明,滤光器的分子信号透射率和谱分离比(SDR)越大,HSRL系统反演精度越高,并且SDR主导低海拔区域的反演精度,而分子信号透射率对高海拔区域的反演影响更明显。此结论适用于大多数具有类似的多信号通道结构的HSRL,对HSRL滤光器的选型和设计具有一定的指导意义。
The influence of the spectral transmittance of the spectral filter in hyperspectral resolution lidar (HSRL) on the accuracy of its aerosol optical properties was studied. A theoretical analysis model of inversion error related to spectral transmittance parameters based on common three-channel HSRL configuration was established. The correctness of the theoretical model of error analysis was verified by Monte Carlo simulation. The theoretical model and MC simulation results show that the higher the spectral transmittance and spectral separation ratio (SDR) of the filter, the higher the accuracy of the HSRL system inversion, and the SDR dominates the inversion accuracy of the low-altitude region. However, the molecular signal transmittance The effect of inversion on high altitude regions is more obvious. This conclusion is applicable to most HSRL with similar multi-signal channel structure, which is of guiding significance for the selection and design of HSRL filter.