利用兰州大学大气科学学院半干旱气候变化教育部重点实验室(SACOL站)气溶胶地基观测资料订正出的地表反射率及构建的沙尘气溶胶模型，借助6S大气辐射传输模式，对Terra卫星上的中分辨率成像光谱仪(MODIS)的L1B多光谱资料，进行了沙尘气溶胶光学厚度的个例反演试验。结果表明，四种反演方案的沙尘气溶胶光学厚度的区域分布均比较合理，说明反演方法可行；考虑了波长指数，并用SACOL资料构建的气溶胶模型进行大气订正得出的地表反射率反演出的沙尘气溶胶光学厚度最接近实际测量值，误差为-7.3%。通过对反演过程中的误差进行数值试验检验，结果表明反演方法比较稳定。

Employing the 6S atmospheric radiation transport model and Terra moderate-resolution imaging spectroradiometer (MODIS) L1B data, the experimental retrieval of dust aerosol optical thickness is performed using surface reflectance atmospheric correction and dust aerosol model built with aerosol observations at Semi-arid Climate and Environment Observatory of Lanzhou University (SACOL). The results show that the four schemes of regional algorithm are feasible. The retrieval result derived from the atmospheric correction scheme using the aerosol model built by SACOL data with consideration for the ngstrm exponent is closest to the surface observation. The relative error is -7.3%. The quantitative analysis of error using a numerical test is performed and the results show that the retrieval is stable.