Ozone and Absorbing Aerosol Measurements by Ultraviolet Total Ozone Unit (TOU) of FY-3 Satellites

Total Ozone Unit (TOU) is one of the main instruments on the FY-3A/B/C satellites and thefirst instruments in China to monitor daily total ozone coverage globally. They have been in orbit since May 2008. Total ozone is retrieved by ultraviolet radiance to observe global ozone distribution and its variation. Then, the absorbing aerosol index (AAI) is retrieved using 331 nm and 360 nm. Data from 2013 were used to observe atmospheric pollution such as smog, dust storm, and biomass burning in China.In this paper, the quality and application of TOU data are shown and discussed, which include L1B radiance, total zone, and AAI.The direction of future instruments is discussed.