| 基于多时相冠层结构参数对冠层光谱的敏感性分析 |
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| 引用本文： | 齐腊,赵春江,黄文江,刘含海.基于多时相冠层结构参数对冠层光谱的敏感性分析[J].地理与地理信息科学,2009,25(6). |
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| 作者姓名： | 齐腊 赵春江 黄文江 刘含海 |
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| 作者单位： | 齐腊(北京师范大学地理学与遥感科学学院,北京,100875;国家农业信息化工程技术研究中心,北京,100097);赵春江,黄文江(国家农业信息化工程技术研究中心,北京,100097);刘含海(山东交通学院土木工程系,山东,济南,250023) |
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| 基金项目： | 国家自然科学基金项目，国家973项目，国家863项目，遥感科学国家重点实验室科研基金 |
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| 摘 要： | 遥感反演的前提需对模型的输入参数进行敏感性分析.该文选取冬小麦返青期、拔节期、孕穗期和抽穗期,考虑输入参数之间的相关性,以辐射传输模型(PROSAIL)为研究对象,对比分析了局部敏感性和全局敏感性方法在模型不确定性和LAI敏感性上的差异.结果表明,随着冬小麦的生长,模拟光谱与实测光谱吻合度提高,模型模拟的不确定性降低;与局部敏感性方法相比,全局敏感性方法的模型不确定性降低,模拟精度提高,冠层光谱对LAI的敏感性有明显变化,植被指数对LAI的敏感性则相对稳定;与NDVI相比,TGDVI对LAI更敏感.
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| 关 键 词： | 辐射传输模型 多时相 局部敏感性分析 全局敏感性分析 不确定性 |
Sensitivity Analysis of Canopy Spectra to Canopy Structural Parameters Based on Multi-temporal Data |
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| QI La,ZHAO Chun-jiang,HUANG Wen-jiang,LIU Han-hai.Sensitivity Analysis of Canopy Spectra to Canopy Structural Parameters Based on Multi-temporal Data[J].Geography and Geo-Information Science,2009,25(6). |
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| Authors: | QI La ZHAO Chun-jiang HUANG Wen-jiang LIU Han-hai |
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| Institution: | QI La1,2,ZHAO Chun-jiang2,HUANG Wen-jiang2,LIU Han-hai3(1.School of Geography , Remote Sensing Sciences,Beijing Normal University,Beijing 100875,2.National Engineering Research Center for Information Technology in Agriculture,Beijing 100097,3.Department of Civil Engineering,Sh,ong Jiaotong University,Jinan 250023,China) |
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| Abstract: | Sensitivity analysis is the first step of remote sensing inversion.The sensitivity of canopy spectra to canopy structural parameters under local and global methods was calculated based on multi-temporal data in the paper.To demonstrate how the relationship between input parameters influences the model output and sensitivity results,the experiment was carried out in winter wheat in Beijing suburb during 2005-2006 and the measuring data were acquired on 7th April,19th April,27th April and 10th May 2006 indivi... |
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| Keywords: | LAI radiative transfer model LAI multi-temporal local sensitivity analysis global sensitivity analysis uncertainty |
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