| 评估MODIS的BRDF角度指数产品 |
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| 引用本文： | 焦子锑,李小文,王锦地,张虎.评估MODIS的BRDF角度指数产品[J].遥感学报,2011,15(3):432-456. |
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| 作者姓名： | 焦子锑 李小文 王锦地 张虎 |
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| 作者单位： | 遥感科学国家重点实验室,北京师范大学;北京师范大学,地理学与遥感科学学院;北京环境遥感与数字城市北京市重点实验室,北京,100875 |
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| 基金项目： | 国家自然科学基金(编号：40871193)；遥感科学国家重点实验室自由探索项目(编号：10ZY-06)；国家重点基础研究发展计划(973计
划) (编号：2007CB714402-8)。 |
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| 摘 要： | 应用地表观测的二向性反射数据集和多种MODIS数据产品,通过统计分析,对MODIS的二向性反射角度指数产品进行综合评估,结果表明:(1)MODIS角度指数包含了地表三维结构信息,有望用来反演地表的物理结构参数;(2)MODIS角度指数是内在的三维关系,各向异性因子(Anisotropic Factor:ANIF)和各向异性指数(Anisotropic Index:ANIX)高相关,建议去掉ANIF以精炼MODIS角度指数产品;(3)各向异性平整指数(Anisotropic FlatIndex:AFX)较好地指示了地表基本散射类型的变化,且具有较小的类内方差,对改善特定地表分类精度可能会更有用.
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| 关 键 词： | MODIS，BRDF，角度指数，植被结构，植被指数 |
| 收稿时间： | 3/5/2010 12:00:00 AM |
| 修稿时间： | 2010/9/30 0:00:00 |
ANIAssessment
of MODIS BRDF shape indicators |
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| JIAO Ziti,LI Xiaowen,WANG Jindi and ZHANG Hu.ANIAssessment
of MODIS BRDF shape indicators[J].Journal of Remote Sensing,2011,15(3):432-456. |
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| Authors: | JIAO Ziti LI Xiaowen WANG Jindi and ZHANG Hu |
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| Institution: | State Key Laboratory of Remote Sensing Science, Jointly Sponsored by Beijing Normal University and the Institute of Remote Sensing
Applications of Chinese Academy of Sciences, School of Geography, Beijing Normal University,
Beijing Key Laboratory of Environmental Remote Sensing and Digital City, Beijing 100875, China;State Key Laboratory of Remote Sensing Science, Jointly Sponsored by Beijing Normal University and the Institute of Remote Sensing
Applications of Chinese Academy of Sciences, School of Geography, Beijing Normal University,
Beijing Key Laboratory of Environmental Remote Sensing and Digital City, Beijing 100875, China;State Key Laboratory of Remote Sensing Science, Jointly Sponsored by Beijing Normal University and the Institute of Remote Sensing
Applications of Chinese Academy of Sciences, School of Geography, Beijing Normal University,
Beijing Key Laboratory of Environmental Remote Sensing and Digital City, Beijing 100875, China;State Key Laboratory of Remote Sensing Science, Jointly Sponsored by Beijing Normal University and the Institute of Remote Sensing
Applications of Chinese Academy of Sciences, School of Geography, Beijing Normal University,
Beijing Key Laboratory of Environmental Remote Sensing and Digital City, Beijing 100875, China |
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| Abstract: | Bidirectional Refl ectance Distribution Function (BRDF) shape indicators of Moderate Resolution Imaging Spectroradiometer
(MODIS) are among MODIS BRDF/Albedo products and are helpful in expanding the application of BRDF remote
sensing data. This paper evaluates the MODIS BRDF shape indicators with the statistical analysis methods by using various
collected ground BRDF datasets and MODIS products. Our result presents several major fi ndings: (1) the MODIS BRDF shape
indicators contain the information regarding 3-D structure of land surface and have the possibility to retrieve the structural parameters
of the land surface; (2) the MODIS BRDF shape indicators are intrinsically three-dimensional. Since Anisotropic Index
(ANIX) is highly related to Anisotropic Factor (ANIF) and has wider value range than the ANIF, the ANIF may be removed from
the MODIS BRDF shape indicator products for refi nement of the MODIS BRDF/Albedo products; (3) Anisotropic Flat Index
(AFX) is related to basically scattering types of land surface with low within-class variances, so it is considered to be more useful
in improving land cover classifi cation accuracy. |
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| Keywords: | MODIS BRDF BRDF shape indicators vegetation structure vegetation index |
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