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遥感技术与应用  2014, Vol. 29 Issue (6): 1037-1045    DOI: 10.11873/j.issn.1004-0323.2014.6.1037
模型与反演     
黑河中游LAI产品的真实性检验研究
家淑珍1,2,马明国1,于文凭1,2
(1.中国科学院寒区旱区环境与工程研究所黑河遥感试验研究站,甘肃 兰州730000;
2.中国科学院大学,北京100049)
Validation of the LAI Product in Heihe River Basin
Jia Shuzhen1,2,Ma Mingguo1,Yu Wenping1,2
(1.Heihe Remote Sensing Experimental Research Station,Cold and Arid Regions Environmental and
Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China;
2.University of Chinese Academy of Sciences,Beijing 100049,China)
 全文: PDF(8304 KB)  
摘要:

遥感产品的应用越来越受到各行各业的高度关注,因此定量遥感产品的真实性检验工作已是当务之急,也是近年来遥感领域研究的热点问题之一。首先总结了国内外学者在LAI遥感产品真实性检验中使用的方法和取得的研究进展,然后结合实例分析了黑河中游不同分辨率LAI产品的真实性检验。通过比较两种不同尺度转换方案得到1 km分辨率的LAI对MODIS LAI产品进行验证,并分析了LAI的尺度效应。结果表明:两种方案比较验证的相关系数为0.57和0.39,借助于高分辨率影像作为中间尺度验证MODIS LAI产品要比直接利用地面实测点尺度转换到低分辨率LAI图验证MODIS LAI产品更合理,且黑河中游MODIS LAI产品存在明显的低估现象,最大偏差达2.26。

关键词: LAI真实性检验尺度转换HiWATERMODISASTER    
Abstract:

The application of remote sensing products become more and more popular in many fields.Validation is an important assurance for the application of remote sensing products,which becomes urgent priority and it is also one of the major hot issues in the field of remote sensing research in recent years.Firstly,this paper summarizes the recent research advances and main methodologies of the LAI product validation.Then the validation of the LAI products with different resolutions in the middle parts of the Heihe River Basin was performed as an application case.Two different scale transformation strategies were used to validate the MODIS LAI product and the scale effect of LAI was analyzed.One strategy is to use the high\|resolution images as an intermediate\|scale for the scale transformation and the other is to realize the scale transformation directly from ground measured point LAI data.The results indicated that the correlation coefficients of two different scale transformation strategies are only 0.57 and 0.39.And the former strategy is better than the later.In the Heihe River Basin,MODIS LAI product is obviously underestimated,and the maximum deviation reaches 2.26.

Key words: LAI    Validation    Scaling    HiWATER    MODIS    ASTER
收稿日期: 2013-08-27 出版日期: 2015-01-15
:  TP 75  
基金资助:

国家自然科学基金重点项目(91125004),国家863计划项目(2013AA12A301)。

通讯作者: 马明国(1976-),男,湖北宜昌人,研究员,主要从事中国西北生态和陆面过程遥感研究。Email:mmg@lzb.ac.cn。    
作者简介: 家淑珍(1989-),女,山西新绛人,硕士研究生,主要从事生态遥感研究。Email:jiashuzhen@lzb.ac.cn。
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引用本文:

家淑珍,马明国,于文凭. 黑河中游LAI产品的真实性检验研究[J]. 遥感技术与应用, 2014, 29(6): 1037-1045.

Jia Shuzhen,Ma Mingguo,Yu Wenping. Validation of the LAI Product in Heihe River Basin. Remote Sensing Technology and Application, 2014, 29(6): 1037-1045.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2014.6.1037        http://www.rsta.ac.cn/CN/Y2014/V29/I6/1037

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