SBDART is a popular model to compute plane-parallel radiative transfer in recent years. The model is designed for the analysis of a wide variety of radiative transfer problems encountered in satellite remote sensing and atmospheric radiation energy balance studies. The program is based on a collection of well tested and advanced physical models, which were developed over the past few decades in research practice. The function and structure of SBDART are introduced briefly in the paper. The SBDART model is combined with satellite data to obtain optical thickness of cloud and cloud drop effective radius, as well as extinction efficiency, in this way, recognition of aircraft icing is realized.