中文摘要：

研究了稀疏植被地区地表反射率的精确确定方法,构建了精确确定稀疏植被地区地表反射率的地面光谱模型,实现了该类地区气溶胶光学厚度的卫星数据反演。分析表明,所构模型的地表反射率确定误差在0.015以内。通过对气溶胶光学厚度反演的不确定性分析,确定稀疏植被地区的气溶胶光学厚度的卫星反演误差在0.15以内,并使用MODIS数据反演了北京市区及周围地区的气溶胶光学厚度。用太阳分光光度计测量的气溶胶光学厚度对MODIS数据的气溶胶光学厚度反演结果进行了验证。

英文摘要：

To infer the aerosol properties of sparsely vegetated areas, a surface reflectance estimation model for blue wave- lengths was suggested to retrieve the aerosol optical thickness in this paper. The accuracy and uncertainty analysis showed that the reflectance estimation error of the model may be less than 0. 015 and the aerosol optical thickness error may be less than 0.15. The model was used to inverse the aerosol optical thickness around Beijing area with MODIS data. And the ground-based sun-photometers were used to measure the aerosol optical thickness simultaneously for validation.