Fine scale optical remote sensing experiment of mixed stand over complex terrain(FOREST)in the Genhe Reserve Area:objective,observation and a case study  

作　　者：Biao Cao Jianbo Qi Erxue Chen Qing Xiao Qinhuo Liu Zengyuan Li 

机构地区：[1]State Key Laboratory of Remote Sensing Science,Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing,People’s Republic of China [2]State Forestry and Grassland Administration Key Laboratory of Forest Resources and Environmental Management,Beijing Forestry University,Beijing,People’s Republic of China [3]Research Institute of Forest Resource Information Techniques,Chinese Academy of Forestry,Beijing,People’s Republic of China [4]University of Chinese Academy of Sciences,Beijing,People’s Republic of China

出　　处：《International Journal of Digital Earth》2021年第10期1411-1432,共22页国际数字地球学报（英文）

基　　金：supported in part by the National Basic Research Program of China(2013CB733400);in part by the Natural Science Foundation of China(41930111 and 41871258);in part by the Youth Innovation Promotion Association CAS under Grant 2020127;in part by the‘Future Star’Talent Plan of the Aerospace Information Research Institute of Chinese Academy of Sciences under Grant Y920570Z1F.

摘　　要：Optical remote sensing allows to efficiently monitor forest ecosystems at regional and global scales.However,most of the widely used optical forward models and backward estimation methods are only suitable for forest canopies in flat areas.To evaluate the recent progress in forest remote sensing over complex terrain,a satellite-airborne-ground synchronous Fine scale Optical Remote sensing Experiment of mixed Stand over complex Terrain(FOREST)was conducted over a 1 km×1 km key experiment area(KEA)located in the Genhe Reserve Areain 2016.Twenty 30 m×30 m elementary sampling units(ESUs)were established to represent the spatiotemporal variations of the KEA.Structural and spectral parameters were simultaneously measured for each ESU.As a case study,we first built two 3D scenes of the KEA with individual-tree and voxel-based approaches,and then simulated the canopy reflectance using the LargE-Scale remote sensing data and image Simulation framework over heterogeneous 3D scenes(LESS).The correlation coefficient between the LESS-simulated reflectance and the airborne-measured reflectance reaches 0.68-0.73 in the red band and 0.56-0.59 in the near-infrared band,indicating a good quality of the experiment dataset.More validation studies of the related forward models and retrieval methods will be done.

关 键 词：Remote sensing experiment FOREST complex terrain Genhe Reserve Area LESS 

分 类 号：G63[文化科学—教育学]