文献类型：期刊文献

英文题名：Improvement and Application of the Conifer Forest Multiangular Hybrid GORT Model MGeoSAIL

作者：Wang, Qiang[1,2] Pang, Yong[3] Li, Zengyuan[3] Chen, Erxue[3] Sun, Guoqing[4] Tan, Bingxiang[3]

第一作者：Wang, Qiang

通信作者：Wang, Q[1]

机构：[1]Harbin Inst Technol, Sch Elect Informat Engn, Harbin 150001, Peoples R China;[2]Heilongjiang Inst Technol, Dept Surveying Engn, Harbin 150040, Peoples R China;[3]Chinese Acad Forestry, Inst Forest Resource Informat Tech, Beijing 100091, Peoples R China;[4]Univ Maryland, Dept Geog, College Pk, MD 20742 USA

年份：2013

卷号：51

期号：10

起止页码：5047-5059

外文期刊名：IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING

收录：;EI(收录号：20134216849061);Scopus(收录号：2-s2.0-84885172902);WOS:【SCI-EXPANDED(收录号:WOS:000325377900015)】；

基金：This work was supported by the National State Key Basic Research Project (No. 2013CB733404), by the The National High Technology Research and Development Program of China (No. 2012AA12A306 and 2009AA12Z146), by the National Natural Science Foundation of China (Grant 41201435), by the Natural Science Foundation of Heilongjiang Province, China (Grant F200934, QC2010017, and G201116), and by the Research Foundation of Education Bureau of Heilongjiang Province, China (Grant 1251G052). (Corresponding author: Y. Pang.)

语种：英文

外文关键词：Bidirectional reflectance distribution function (BRDF); geometric-optic model; look-up table; radiation transfer model; tree pattern; uniform index

摘要：Compared with traditional remote sensing, multiangular observation provides 3-D structural information of a forest through different directional observations. The MGeoSAIL model, suitable for multiangular observations, was developed based on the single-angle model GeoSAIL. The MGeoSAIL model combines the geometric-optic model with the radiation transfer model and has the advantages of both models. Thus, it is more accurate and feasible. The geometric-optic model calculates the amount of shadowed and illuminated components within a forest scene, while the radiation transfer model [Scattering by Arbitrarily Inclined Leaves (SAIL)] calculates the reflectance and transmittance of tree crowns. The uniform index is introduced to characterize the relationship quantitatively between tree distribution pattern and the bidirectional reflectance distribution function (BRDF). The simulation results show that the MGeoSAIL model could simulate the "hot" spot in red and near-infrared bands, as well as the "bowl" shape in the near-infrared band. The relationship between the uniform index and BRDF is negatively exponential. Finally, the look-up table was calculated using the MGeoSAIL model, and leaf area index (LAI) was inversed from compact high-resolution imaging spectrometry data. The results compared well with the measured LAI in Changbai Mountain area, China.