大气气溶胶航空多角度偏振观测实验及数据分析
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摘要
鉴于多角度偏振辐射数据可以有效提升大气气溶胶参数的反演精度,设计了多角度偏振探测航空实验及数据处理流程。将我国自主研制的多角度偏振成像仪DPC搭载在航空平台上,同时在地面布设太阳辐射计CE318观测站点,设计航线串联地面观测站点,开展了航空飞行实验。对实验获得的数据进行分析处理,结果表明,多角度偏振探测航空实验可获取高精度的偏振、辐射数据;使用该数据反演大气气溶胶光学厚度,反演误差小于3%,初步验证了多角度偏振成像仪可为大气气溶胶多参数反演提供有效的数据。
The inversion precision of atmospheric aerosol parameters can be more effectively improved by the combination of multi-angle polarization and radiation data,so the airborne experiment is designed and completed to obtain multi-angle polarization and radiation data.The self-developed multi-angle directional polarized camera(DPC) is equipped on the aircraft,and sun-photometer CE318 is mounted at ground stations,then aviation flight experiment was carried out by designing aircraft's course series ground stations.The data obtained from airborne experiment is analyzed,and the results show that DPC on the aircraft can obtain high precision polarization and radiation data.The atmospheric aerosols optical depth is retrieved using the experiment data,and inversion error is less than 3%,which demonstrates validity of multi-angle polarization and radiation data from airborne experiment.
The inversion precision of atmospheric aerosol parameters can be more effectively improved by the combination of multi-angle polarization and radiation data,so the airborne experiment is designed and completed to obtain multi-angle polarization and radiation data.The self-developed multi-angle directional polarized camera(DPC) is equipped on the aircraft,and sun-photometer CE318 is mounted at ground stations,then aviation flight experiment was carried out by designing aircraft's course series ground stations.The data obtained from airborne experiment is analyzed,and the results show that DPC on the aircraft can obtain high precision polarization and radiation data.The atmospheric aerosols optical depth is retrieved using the experiment data,and inversion error is less than 3%,which demonstrates validity of multi-angle polarization and radiation data from airborne experiment.
引文
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[2]Mao Jietai,Zhang Junhua,Wang Meihua.Summary comment on research of atmospheric Aaerosol in China[J].Acta Meteorologica Sirica,2002,60(5):625-634(in Chinese).毛节泰,张军华,王美华.中国大气气溶胶研究综述[J].气象学报,2002,60(5):625-634.
[3]Zhang Zhaoyang,Su Lin,Chen Liangfu.Retrieval and analysis of aerosol lidar ratio at several typical regions in China[J].Chinese Journal of Lasers,2013,40(5):0513002(in Chinese).张朝阳,苏林,陈良富.中国典型地区气溶胶激光雷达比反演与分析[J].中国激光,2013,40(5):0513002.
[4]Hao Zengzhou,Gong Fang,Pan Delu,et al.Scattering and polarization characteristics of dust aerosol particles[J].Acta Optica Sinica,2012,32(1):0101002(in Chinese).郝增周,龚芳,潘德炉,等.沙尘气溶胶粒子群的散射和偏振特性[J].光学学报,2012,32(1):0101002.
[5]Tao Jinhua,Zhang Meigen,Chen Liangfu,et al.Method to estimate concentration of surface-level particulate matter from satellite-based aerosol optical thickness[J].Science China:Earth Sciences,2013,43(1):143-154(in Chinese).陶金花,张美根,陈良富,等.一种基于卫星遥感AOT估算近地面颗粒物的方法[J].中国科学:地球科学,2013,43(1):143-154.
[6]Gu X,Cheng T,Xie D,et al.Analysis of surface and aerosol polarized reflectance for aerosol retrieval from polarized remote sensing in PRD urban region[J].Atmos.Environ.,2011,45:6607-6612.
[7]Duan Minzheng,Lii Daren.Simultaneously retrieving aerosol optical depth and surface albedo over land from POLDER's multi-angle polarized measurement.Ⅱ:a case study[J].Chinese Journal of Atmospheric Sciences,2008,32(1):27-34(in Chinese).段民征,吕达仁.利用多角度POLDER,偏振资料实现陆地上空大气气溶胶光学厚度和地表反照率的同时反演Ⅱ.实例分析[J].大气科学,2008,32(1):27-34.
[8]Chen Ligang.Study of Laboratory Calibration of the Airborne Polarization CCD Camera with Wide Field of View(Optics)[D].Doctorial Dissertation of Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,2008:15-26(in Chinese).陈立刚.宽视场航空偏振成像仪的实验室定标研究[D].合肥:中国科学院安徽光机所博士论文,2008:15-26.
[9]Gu Xingfa,Chen Xingfeng,Cheng Tianhai,et aJ.In-flight polarization calibration methods of directional polarized remote sensing camera DPC[J].Acta Phys.Sin.,2011,60(7):070702(in Chinese).顾行发,陈兴峰,程天海,等.多角度偏振遥感相机DPC在轨偏振定标[J].物理学报,2011,60(7):070702.
[10]Huang Honglian,Yi Weining,Qiao Yanli.A method for retrieving aerosol optical properties based on sun photometer[J].Journal of Atmospheric and Environmental Optics,2012,7(3):175-180(in Chinese).黄红莲,易维宁,乔延利.基于太阳辐射计的气溶胶光学特性反演算法研究[J].大气与环境光学学报,2012,7(3):175-180.
[11]Huang Honglian,Yi Weining,Qiao Yanli.Validation of retrieving aerosol optical parameters over the sea using airborne directional polarized camera[J].Acta Optica Sinica,2014,34(6):0601004(in Chinese).黄红莲,易维宁,乔延利.基于航空偏振相机的海上气溶胶光学特性反演与验证[J].光学学报,2014,34(6):0601004.