一种确定消光系数边界值的新算法  

Method for DeterminingBoundaryValue of Extinction Coefficient

作　　者：陈晓楠[1] 毕京平 王凯欣 韩冰 柳云雷 Chen Xiaonan;Bi Jingping;Wang Kaixin;Han Bing;Liu Yunlei(Information Science and Technology College,Dalian Maritime University,Dalian,Liaoning 116026,China;Dalian Meteorological Equipment Support Center,Dalian,Liaoning 116001,China)

机构地区：[1]大连海事大学信息科学技术学院,辽宁大连116026 [2]大连市气象装备保障中心,辽宁大连116001

出　　处：《激光与光电子学进展》2019年第24期40-46,共7页Laser & Optoelectronics Progress

基　　金：国家重点研发计划（2017YFC0406005）

摘　　要：在反演大气消光系数过程中,一个值得探讨的问题就是消光系数边界值的选择问题。提出了一种基于横向Steffensen型3阶方法求解大气气溶胶消光系数边界值的新算法,并将该方法应用于仿真信号和实际观测到的回波信号中求解大气消光系数,证明了所提算法的真实可靠性。结果表明,所提算法迭代速度快,经过较少的迭代次数就可收敛到消光系数的边界值,能够较准确地反演大气消光系数。During the inversion of atmospheric extinction coefficient,choosing the boundary value of the extinction coefficient is critical.In this study,a new method based on lateral Steffensen-like third-order method is proposed for determining the boundary value of atmospheric aerosol extinction coefficient.To confirm the method reliability,the proposed method is applied to both simulated and actual measured echo signals.Results show that the proposed method has high iterative speed and converges to the boundary value of extinction coefficient after a few iterations,which can invert atmospheric extinction coefficient more accurately.

关 键 词：大气光学 激光雷达 消光系数 边界值 迭代法 

分 类 号：TN958.98[电子电信—信号与信息处理]