联合Terra/Aqua MODIS多角度多光谱数据反演冬小麦叶面积指数

被引:6
作者
何维 [1 ,2 ,3 ]
杨华 [1 ,2 ,3 ]
机构
[1] 北京师范大学地理学与遥感科学学院
[2] 北京师范大学/中科院遥感应用研究所遥感科学国家重点实验室
[3] 环境遥感与数字城市北京市重点实验室
基金
国家高技术研究发展计划(863计划);
关键词
遥感; 波; 反射; 反演; 叶面积指数; MODIS数据; 冬小麦;
D O I
暂无
中图分类号
S512.11 []; TP79 [遥感技术的应用];
学科分类号
0901 ; 081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要
Terra与Aqua双星搭载的MODIS传感器可实现每日上下午分别对同一地点观测一次,并且由于卫星轨道漂移形成累积连续多天的多角度观测特点,加上多通道的光谱响应,极大地丰富了地表目标的观测信息,为LAI等地表参数的实时准确反演提供了可能。该文利用MODIS双星高质量的连续多天的多波段地表反射率数据,结合PROSAIL(PROSPECT+SAIL,properties spectra+scattering by arbitrarily inclined leaves)模型和查找表方法反演冬小麦LAI,并与MODIS LAI产品及野外采样点实测LAI对比,结果表明,联合双星高质量的多角度多波段数据能够较准确反演冬小麦LAI,其反演结果无论从空间分布还是时序变化特征来讲,较MODIS LAI产品更符合实际情况,也更接近地面实测值。该文的研究为充分利用MODIS数据的角度和光谱信息反演小麦等农作物的LAI提供了一定的借鉴。
引用
收藏
页码:204 / 212+298 +298-299
页数:11
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