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基于微缩模型的森林BRF测量

DOI: 10.6046/gtzyyg.2014.04.10, PP. 56-62

Keywords: 微缩模型,双向反射率,森林,热点效应

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Abstract:

利用林木微缩模型构建不同空间分布的林分,测量林分的双向反射率因子(bidirectionalreflectancefactor,BRF),并对其反射光谱进行了分析研究。结果显示:基于微缩模型得到的观测结果整体较符合实际森林的特征,与三维模型模拟结果一致;在近红外波段,光谱曲线呈典型的“碗边效应”,在观测主平面“热点效应”较为明显。研究结果证实林木微缩模型可以用于森林BRF研究。对不同林木模型的分布状态与不同的地形条件的测量结果对比分析后发现,林木分布的密度和坡度是较为敏感的参数,其特征与规律性有助于建模反演地表信息。

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