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激光雷达探测气溶胶光学特性的不确定性因素研究

Uncertainty Factors of Aerosol Optical Properties Inversion by Lidar

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摘要

针对环境领域中最常用的米氏散射激光雷达, 通过讨论气溶胶光学特性反演方法的流程, 分析了影响反演结果准确度的各种不确定性因素。分析结果表明, 为获取高稳定性和高可靠性的探测结果, 需要采用合理的信号去噪方法, 设置合理的累加次数、气溶胶消光后向散射比、标定高度和标定值等。此外, 还需要对反演算法进行定期标定, 主要包括几何重叠因子标定、球载消光仪标定、瑞利散射标定、能见度仪标定、太阳光度计标定、湿度标定、颗粒物浓度标定等。通过这一系列配置和标定后, 多台激光雷达数据可以达到高度的一致性和准确性。

Abstract

For the most commonly used Mie scattering laser radar in the environmental field, through the process discussion of the inversion of aerosol optical characteristics, we analyze the uncertain factors which affect the accuracy of inversion results. The result shows that in order to obtain the results with high stability and reliable detection, the system use a reasonable signal denoising method to set up accumulative frequency, signal denoising method, aerosol extinction backscatter ratio, calibration height and calibration value. In addition, the system needs to calibrate the inversion algorithm regularly, including geometric overlap factor calibration, balloon borne extinction instrument calibration, Rayleigh scattering calibration, visibility meter calibration, sun photometer calibration, humidity calibration, particle concentration calibration and so on. With this series of configuration and calibration, multiple lidars data can achieve high consistency and accuracy.

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中图分类号:P412

DOI:10.3788/lop55.092801

所属栏目:遥感与传感器

基金项目:国家重点研发计划(2016YFC0200401, 2017YFC0213002, DQGG0102)、国家科技支撑项目(2014BAC21B01)、国家自然科学基金(41305126,41605020)、国家 973计划(2014CB447900)

收稿日期:2018-03-20

修改稿日期:2018-03-26

网络出版日期:2018-04-02

作者单位    点击查看

项衍:中国科学院安徽光学精密机械研究所环境光学与技术重点实验室, 安徽 合肥 230031中国科学技术大学, 安徽 合肥 230026
刘建国:中国科学院安徽光学精密机械研究所环境光学与技术重点实验室, 安徽 合肥 230031
张天舒:中国科学院安徽光学精密机械研究所环境光学与技术重点实验室, 安徽 合肥 230031
吕立慧:中国科学院安徽光学精密机械研究所环境光学与技术重点实验室, 安徽 合肥 230031中国科学技术大学, 安徽 合肥 230026
付毅宾:中国科学院安徽光学精密机械研究所环境光学与技术重点实验室, 安徽 合肥 230031

联系人作者:张天舒(tszhang@aiofm.ac.cn)

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引用该论文

Xiang Yan,Liu Jianguo,Zhang Tianshu,Lü Lihui,Fu Yibin. Uncertainty Factors of Aerosol Optical Properties Inversion by Lidar[J]. Laser & Optoelectronics Progress, 2018, 55(9): 092801

项衍,刘建国,张天舒,吕立慧,付毅宾. 激光雷达探测气溶胶光学特性的不确定性因素研究[J]. 激光与光电子学进展, 2018, 55(9): 092801

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