大气与环境光学学报2025，Vol.20Issue(2)：123-133,11.DOI:10.3969/j.issn.1673-6141.2025.02.001
532nm偏振激光雷达互比对实验及结果分析
Intercomparisons of 532 nm polarization lidar and result analysis
摘要
Abstract
In view of the development of aerosol lidar network in megacities in China,the calibration methods and quantitative methods of aerosol lidar network are continuously studied and solved by referring to the calibration strategy of the European Aerosol Research Lidar Network(EARLINET).In September 2021,a self-calibration/intercomparison and quantification study was carried out for six 532 nm polarization lidars developed by different units at the Southern Suburb Observatory of Beijing.After self-calibration of the key performance of the lidars,such as optical geometry calibration,dark noise,Rayleigh fit and effective detection range,the intercomparison observations with the reference lidar were carried out,and the quality evaluation of polarization performance of the lidars to be calibrated was carried out by using the strategy of statistical analysis of system deviation and standard deviation.The results show that the averaged relative deviation of horizontal polarization signal P of 532 nm lidars after self-calibration can be controlled within 10%in the height range of 0.5-2 km,and within 20%in the height range of 2-5 km.While the original signal of vertical polarization S shows a big difference of over 50%.After being transferred to the backscattering coefficient,the mean relative deviation and standard deviation can be controlled within 10%in the height range of 0.5-2 km,and within 20%in the height range of 2-5 km.The method of self calibration and intercomparison with the reference lidar is helpful to quantitatively evaluate the observation performance of 532 nm polarization lidar in China,and also can be used as a routine quality control method to improve the consistency of the signal products of atmospheric lidar network and the accuracy of the retrieval products,laying the foundation for atmospheric aerosol lidar to enter the quantitative network observation.关键词
偏振激光雷达/气溶胶/组网标定/互对比Key words
polarization lidar/aerosol/networking calibration/intercomparisons分类
电子信息工程引用本文复制引用
步志超,王宣,殷振平,毛松,王龙龙,王安宙,张江涛,赵兵,易洋,陈玉宝..532nm偏振激光雷达互比对实验及结果分析[J].大气与环境光学学报,2025,20(2):123-133,11.基金项目
国家自然科学基金(62105248,62005201,62275202,42205130) （62105248,62005201,62275202,42205130）
