摘要
海洋激光雷达具有强穿水、高垂向分辨、全天时观测等技术特点,在海洋剖面测量上极具应用潜力,而海洋激光雷达的准确测量离不开系统常数的准确标定。针对这一现实需求,文章提出了一种基于星载被动遥感的海洋激光雷达系统常数新型标定方法。该方法基于海洋主被动光学遥感联合模型,通过利用星载被动遥感获取的海面遥感反射率数据,可在全球范围内实现对海洋激光雷达系统常数实时高效标定。基于自研机载海洋激光雷达与在轨Aqua-MODIS数据,在广西北部湾海域对该标定方法开展航飞试验验证,试验结果表明该方法准确有效,利用标定航线完成对激光雷达系统常数标定后,在检验航线中海洋激光雷达实测值与理论值的误差均值为13.7%。
Ocean Lidar has the technical characteristics of strong water penetration,high vertical resolution and all-day observation,so it has great application potential in satellite ocean profile measurement.But the accurate measurement of ocean Lidar is inseparable from the accurate calibration of system constant.To meet this requirement,a novel calibration method for ocean lidar system constant based on satellite-borne passive remote sensing is proposed.This method is based on the combined model of ocean active and passive optical remote sensing.By using the remote sensing reflectivity data obtained by satellite-borne passive remote sensing technology,real-time and efficient calibration of ocean LiDAR system constants can be realized on a global scale.Based on the self-developed airborne ocean Lidar and in-orbit Aqua-MODIS data,the proposed calibration method is validated by flight tests in the Beibu Gulf of Guangxi.The results show that the method is accurate and effective.After the calibration of LiDAR system constant,the root mean square of mean relative difference between the measured value and the theoretical value is 13.7%.
作者
张景豪
尚卫东
沈振民
杨颂
李同
叶小敏
梁琨
程亮
周国清
郑永超
ZHANG Jinghao;SHANG Weidong;SHEN Zhenmin;YANG Song;LI Tong;YE Xiaomin;LIANG Kun;CHENG Liang;ZHOU Guoqing;ZHENG Yongchao(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China;Key Laboratory of Space Laser Information Sensing Technology,China Academy of Space Technology,Beijing 100094,China;National Satellite Ocean Application Service,Beijing 100081,China;School of Electronic Information and Communications,Huazhong University of Science and Technology,Wuhan 430074,China;School of Geographic and Oceanographic Science,Nanjing University,Nanjing 210023,China;College of Geomatics and Geoinformation,Guilin University of Technology,Guilin 541004,China)
出处
《航天返回与遥感》
CSCD
北大核心
2024年第3期131-136,共6页
Spacecraft Recovery & Remote Sensing
关键词
海洋光学
激光雷达
卫星遥感
系统标定
oceanic optics
LiDAR
satellite remote sensing
system calibration
