This paper has analyzed the importance of atmosphere correction in PS processing, described the existent

method for atmosphere correction, and pointed out the shortcoming in the existent method for atmosphere correction

in PS processing. Considering the advantages of correcting atmosphere effects based on MERIS, this paper presents a

method for atmosphere correction combined with MERIS in PS processing. For the purpose of evaluating the methods for

atmosphere correction, the authors conducted an experiment to compute the atmosphere effect with the presented

method by using ASAR data covering Beiluhe test area. The result indicates that, with this method, the atmosphere

correction can be made in PS processing with relative fewer SAR data.