1. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：The present paper performed the evaluation of four dark-object subtraction(DOS) atmospheric correction methods based on 2012 Inner Mongolia experimental data. The authors analyzed the impacts of key parameters of four DOS methods when they were applied to ZY-3 CCD data. The results showed that (1) All four DOS methods have significant atmospheric correction effect at band 1, 2 and 3. But as for band 4, the atmospheric correction effect of DOS4 is the best while DOS2 is the worst; both DOS1 and DOS3 has no obvious atmospheric correction effect. (2) The relative error (RE) of DOS1 atmospheric correction method is larger than 10% at four bands; The atmospheric correction effect of DOS2 works the best at band 1(AE (absolute error)=0.001 9 and RE=4.32%) and the worst error appears at band 4(AE=0.046 4 and RE=19.12%); The RE of DOS3 is about 10% for all bands. (3) The AE of atmospheric correction results for DOS4 method is less than 0.02 and the RE is less than 10% for all bands.Therefore,the DOS4 method provides the best accuracy of atmospheric correction results for ZY-3 image.
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