物理学报2011，Vol.60Issue(6)：310-318,9.
Fernald前向积分用于机载激光雷达气溶胶后向散射系数反演的理论研究
Theoretical research of Fernald forward integration method for aerosol backscatter coefficient inversion of airborne atmosphere detecting lidar
摘要
Abstract
Preliminary inversion results show that the Fernald forward integration method ( FFIM ) can be used to calculate aerosol backscatter coefficient from airborne atmosphere detecting lidar. But the corresponding theoretical explanations have not been found in relevant papers. In this paper,We use the simulated data based on the ground-based atmosphere detecting radar in Hefei lidar data on February 27, 2008, to quantitatively analyze the above inversion results obtained by the FFIM . Results show that there are three main reasons that the FFIM can be used to calculate aerosol backscatter coefficient when the altitude of lidar calibration points is about 10km. First, the inversion error cannot be infinite and negative results will not appear because the difference batween the denominator items in the Fernald forward integration equation is always greater than zero. Second, inversion error is no more than 0.006 when calibration error is 100% , which is 0. 6 percent of the denominator value. Third, Molecule backscatter coefficient is dominant in the calibration item of the Fernald forward integration equation. Big fluctuation range of aerosol backscatter coefficient in the calibration points has little influence on the calibration item value. In general, the atmosphere structure that has a small density in the upper layer but a big density in the lowerlayer, and a high calibration position are two basic reasons for which the FFIM can be applied to the aerosol backscatter coefficient inversion through using airborne atmosphere detecting lidar data.关键词
大气光学/Fernald前向积分法/机载大气探测激光雷达/气溶胶后向散射系数Key words
atmospheric optics/Fernald forward integration method/airborne atmosphere detecting lidar/aerosol引用本文复制引用
刘厚通,陈良富,苏林..Fernald前向积分用于机载激光雷达气溶胶后向散射系数反演的理论研究[J].物理学报,2011,60(6):310-318,9.基金项目
中国博士后科学基金(批准号:20100470601)、遥感科学国家重点实验室自由探索基金、国家自然科学基金(批准号:41075027)和国家重点基础研究发展计划(批准号:2010CB950801)资助的课题. （批准号:20100470601）
