光学学报, 2014, 34 (8): 0801003, 网络出版: 2014-06-24
光谱滤光器透射率参数对高光谱分辨率激光雷达的影响分析
Influences Analysis of the Spectral Filter Transmission on the Performance of High-Spectral-Resolution Lidar
大气光学 激光雷达 高光谱分辨率 光谱滤光器 反演精度 性能优化 atmospheric optics lidar high spectral resolution spectral filter retrieval accuracy performance optimization
摘要
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。
Abstract
Influences of transmission parameters of the spectral filter on the retrieval accuracy for atmospheric aerosol optical properties in high-spectral-resolution lidar (HSRL) are studied. The theoretical analysis model for retrieval error estimation related to the spectral transmission parameters is established based on a general three-channel HSRL configuration and the correctness of this error analytical model is validated by Monte Carlo (MC) simulations. The model and the MC simulation results indicate that the larger the molecular transmittance and the spectral discrimination ratio (SDR) of the filter are, the larger the HSRL accuracy is. Moreover, SDR dominates the retrieval accuracy at low altitudes while the molecular transmittance attaches more influences to the retrieval accuracy at high altitudes. These results are expected to be adaptable to many HSRLs which have the similar multi-channel layout thus can provide certain guidelines to the choosing or designing of the filter.
成中涛, 刘东, 罗敬, 杨甬英, 王治飞, 周雨迪, 黄寒璐, 沈亦兵. 光谱滤光器透射率参数对高光谱分辨率激光雷达的影响分析[J]. 光学学报, 2014, 34(8): 0801003. Cheng Zhongtao, Liu Dong, Luo Jing, Yang Yongying, Wang Zhifei, Zhou Yudi, Huang Hanlu, Shen Yibing. Influences Analysis of the Spectral Filter Transmission on the Performance of High-Spectral-Resolution Lidar[J]. Acta Optica Sinica, 2014, 34(8): 0801003.