【作者】 邱宗甲； 陈思颖； 张寅超； 步志超； 王玉诏； 孔卫国； 刘鹏； 陈和； 倪国强；

【Author】 Qiu Zongjia Chen Siying Zhang Yinchao Bu Zhichao Wang Yuzhao Kong Weiguo Liu Peng Chen He Ni Guoqiang (Key Laboratory of Photoelectronic Imaging Technology and System,Ministry of Education of China,Beijing Institute of Technology,Beijing 100081,China)

【机构】 北京理工大学光电成像技术与系统教育部重点实验室；

【摘要】 针对研制的具有高光谱分辨率、大动态范围及高精度的气溶胶探测激光雷达,对北京市内对流层及平流层大气气溶胶进行了测量实验。通过引入大气参数后向散射比,文中给出了气溶胶后向散射系数的计算式。利用微分方法对气溶胶后向散射系数进行分解,从而给出消光系数的测量误差,并对误差来源进行量化分析。文中分别对回波信号波动误差、大气透过率误差、大气分子模式误差及校准误差进行计算,给出了这四种误差造成的气溶胶探测激光雷达测量消光系数的不确定度。结果显示在这种气溶胶后向散射系数求解中,由假定的大气透过率及远场信号自身的抖动是误差的最大来源。更多还原

【Abstract】 Implementation of the high spectral resolution,large dynamic range and high precision detection of lidar for measurement of troposphere and stratosphere aerosol in Beijing is presented.The paper gives the aerosol backscatter coefficient expression by deducing backscattering ratio.By using the differential method,the aerosol backscatter coefficient measurement error is given as a function of the atmospheric and lidar parameters.A quantitative analysis on the error sources is proposed.The lidar signal fluctuation,the atmospheric transmittance,the atmospheric molecular model and calibration errors are respectively analyzed.And the uncertainty of aerosol backscattering coefficient is given.It is shown that far-field signal shot noise and atmospheric transmission uncertainty are the dominant sources of error.更多还原