The Research of AOT Quantitative Retrieval in Beijing with Landsat/7 ETM Data

The first band (0.45-0.52 mum) of two Iandsat7/ETM high resolution images are used in an effort to assess spatial distribution of AOT (Aerosol Optical Thickness) by improved DTA (Different Texture Analysis) method. Atmospheric correction process for reference image and cloud mask process for two images were added to original DTA method. Retrieved AOT result is compared with MOD4_L2 products provided by NASA. Results showed that the concentration spatial distribution of AOT in Beijing can be preferably described quantitatively by improved DTA method. In the end, Limitations and improvements of the DTA method need to be done were discussed.