Evaluation And Retrival Of FY-3B Microwave Radiation Imager Brightness Temperature

Microwave remote sensing is a technology that makes use of the feature of electromagnetic wave and microwave to get information of the Earth. Microwave radiometer-- one of the main sensors of microwave remote sensing has provided successfully a number of observations for the fields of atmosphere and ocean and so on. China's technology in satellite microwave radiometer developed lately. At present ,there are few microwave imagers operational that are be carried on FY-3A / B series of satellites.FY-3B satellite was launched on November 5, 2010. In order to fully assess the performance of FY-3B Microwave Imager's data, and analyze its related applications in the future, the paper has used the method of comparison between satellites,and referred to AMSR-E microwave radiometer data as the standard data. FY-3B data has been processed, then its brightness temperature assessed, finally ocean parameters been retrieved and so onThe specific contents and conclusions of this study are as follows:1,The FY-3B Radiation Microwave Imager brightness temperature data were processed and global distribution maps for the brightness temperature data were also generated, Compared with the AMSR-E data, the surface radiation response were analyzed for eachl channel of FY-3B Microwave Radiation Imager. The results showed that land information gathered by FY-3B surface brightness temperature global distribution map is accurate, the boundarie between sea and land is clear, and the brightness temperature response characteristics at different frequencies and different type of polarization are much the same between FY-3B and AMSR-E.2,Matched data set between part of the Bohai Sea and Yellow Sea were established for FY-3B and AMSR-E brightness temperature data, and the FY-3B brightness temperature data were evaluated qualitatively and quantitatively, the results show that the FY-3B and the AMSR-E brightness temperature of each channel are linear, especially in the ocean. linearly dependent coefficient for 28.7GHZ,23.8GHZ and 36.5GHZ band is above 0.85.