激光测高卫星ICESat-2云检测及其相关算法  

Cloud Detection of Laser Altimetry Satellite ICESat-2 and the Related Algorithm

作　　者：么嘉棋 唐新明 李国元 艾波[1] 杨雄丹 谢栋平 Yao Jiaqi;Tang Xinming;Li Guoyuan;Ai Bo;Yang Xiongdan;Xie Dongping(College of Geomrtics,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;Land Satellite Remote Sensing Application Center,Ministry of Natural Resources of China,Beijing 100048,China;School of Mapping and Geographical Science,Liaoning Technical University,Fuxin,Liaoning 123000,China)

机构地区：[1]山东科技大学测绘科学与工程学院,山东青岛266590 [2]自然资源部国土卫星遥感应用中心,北京100048 [3]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000

出　　处：《激光与光电子学进展》2020年第13期240-248,共9页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(41871382);中科院主动光学重点实验室开放基金(2018-ZDKF-1)。

摘　　要：冰、云和陆地高程卫星2号(ICESat-2)通过多波束的光子计数体制方式采集数据,使数据覆盖密度、数据精度都有很大的提高。大气中的云、气溶胶等引起的前向散射效应对数据精度有不可忽视的影响,根据ATLAS光子计数体制下的脉冲折叠数据特性,提出一种基于表观地表反射率的云检测算法,并对ICESat-2云检测及其相关算法流程进行详细梳理,研究结果对于ICESat-2数据在大气方面的应用拓展有一定的帮助,对我国后续激光测高卫星大气影响改正也有一定借鉴意义。ICESat-2 satellite data are collected by a multi-beam photon-counting system,which greatly improves data coverage density and data accuracy.The forward-scattering effect caused by clouds and aerosols in the atmosphere significantly influences data accuracy.In this paper,an apparent surface reflectance-based cloud-detection algorithm using the pulse-folding characteristics of the ATLAS photon-counting system is proposed.The ICESat-2 cloud-detection process and its related algorithm are described in detail,which will be helpful for the application and expansion of ICESat-2 data in studies of the atmosphere.The results will provide reference that will be of significance for the correction of subsequent atmospheric effects in laser altimetry acquired by Chinese satellites.

关 键 词：激光光学 ICESat-2 ATLAS 单光子 前向散射 大气观测 云检测 

分 类 号：O436[机械工程—光学工程]