Application Analysis of Temperature Data of FY4A Satellite Based on Measured Data

To investigate the feasibility of FY4A satellite temperature data whether can be applied for atmospheric duct research, the FY4A satellite data are analyzed according to the temperature data measured in South China Sea from April 10 to April 17, 2021. meanwhile, the differences between the two data are evaluated in terms of the average deviation and standard deviation. The results indicate that when the temperature data is excellent quality, the average deviation range is −0.1 °Cto 0.5 °C and the standard deviation range is 1.35 °C to 2.92 °C. On the whole, the temperature data measured in the vertical direction of FY4A satellite has high accuracy above good quality, which is more suitable for monitoring elevated ducts.