摘要
森林是陆地上组成结构最复杂的生态系统,星载激光雷达兼具高垂直分辨率的优势和大范围数据获取的特点,在大区域尺度的森林参数定量反演方面具有独特的优势。从全波形激光雷达、光子计数激光雷达、成像激光雷达的技术特点、数据处理和森林参数提取等方面,总结了国内外森林探测激光雷达卫星载荷的发展、参数设置及应用潜力,以服务我国星载激光雷达森林探测系统的建设和发展。结合激光雷达辐射传输模型,探讨适合森林探测的激光雷达传感器参数方案,并以ICESat卫星的地球科学测高系统(GLAS)和先进地形激光测高系统(ATLAS)数据为例,探讨星载激光雷达的森林参数反演方法,最后总结梳理了现有星载载荷的优劣并给出后续载荷发展的建议。
Forest is the most complex ecosystem on the earth land surface. The spaceborne lidar system,which combines the advantages of accurate vertical measurement and large-scale data acquisition capability,has its own superiority of quantitative forest parameter inversion over a large area. The characteristics,data processing,and forest parameter extraction of full waveform lidar,photon counting lidar,and imaging lidar systems are described. To serve the construction and development of forest detection using China’s own spaceborne lidar system,the sensor development,parameter settings,and application potential are summarized,and the sensor arrangement which suits the forest applications based on lidar radiative transfer models is discussed. The inversion methods of forest parameters are demonstrated by example data from the ICESat GLAS and ATLAS. Finally,advantages and disadvantages of existing spaceborne sensors are summarized and recommendations for future hardware development are provided.
作者
庞勇
李增元
陈博伟
梁晓军
PANG Yong;LI Zengyuan;CHEN Bowei;LIANG Xiaojun(Institute of Forest Resource Information Techniques,Chinese Academy of Forestry,Beijing 100091,China)
出处
《上海航天》
CSCD
2019年第3期20-27,共8页
Aerospace Shanghai
基金
国家自然科学基金(41871278)
关键词
星载激光雷达
森林探测
全波形
光子计数
成像
spaceborne lidar
forest detection
full waveform
photon counting
imaging
