中文摘要：

为了在中高分辨率地表反照率遥感反演算法中体现地表反射各向异性特征,以两景Landsat-8地表反射率数据为例,利用在时空对应的MODISBRDF产品中提取的地表反射各向异性先验知识,反演得到30 m空间分辨率的地表反照率产品,并将结果与朗伯假设地表反照率和地面站点实测反照率数据进行比较.结果表明：①基于朗伯假设所得地表反照率与地表实测反照率存在明显差异,这种差异会随太阳天顶角的变化而变化,最大相对差异约为4%;②基于MODIS BRDF产品提取的地表反射各向异性先验知识可以较好地改善地表反照率的反演精度,与地面实测数据具有更好的一致性.

英文摘要：

In order to incarnate the surface reflection anisotropy character in the inversion algorithms of medium high-reso- lution surface albedo, two Landsat-8 surface reflectance data were taken as an example, the prior knowledge extracted from concurrent MODIS BRDF products was used to inverse 30 m resolution surface albedo, and the results were compared with albedo that assumed a Lambertian surface and observed by ground station. The results show that surface albedo based on Lambertian assumption has obvious differences with field measured albedo, and the difference changes with solar zenith angles, while the largest relative difference is 4%. The retrieved albedo based on prior BRDF knowledge can improve the accuracy of surface albedo, and have a better consistency with field measured albedo.