晴空地表反照率正则化反演算法的POLDEH多角度数据验证

Sheng-cheng CUI,Shi-zhi YANG,Qiang ZHAO,Jia-cheng WANG,Zhen WANG,Yan-mei WANG

Journal of Atmospheric and Environmental Optics（2011）

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Abstract

使用偏差原则和正则化方法反演晴空地表双向反射分布函数BRDF、方向-半球反射率DHR 和双半球反射率BHR.利用6S辐射传输模型计算出天空散射光,并以此为权重将DHR和BHR进行线性组合得到地物光谱反照率.最后,通过窄波段反照率向宽波段转换,计算了0.25～2.5μm的短波反照率.使用POLDER-3/PARASOL多角度数据进行验证,并将所得结果与MODIS AMBRALS算法进行比较.结果表明该算法和MODIS反演算法精度相当.

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Key words

albedo,retrieval,regularization,discrepancy principle

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