Lunar calibration for the visible light channel of FY-2F satellite

The lunar's extremely high stability and the lunar reflections' dynamic range are comparable to the dynamic range of remote sensing instruments, making lunar calibration a popular on-orbit calibration method. In this paper, we propose a method for radiometric calibration of lunar observation data based on the visible channel of the FY-2F satellite. It adopted a series of operations such as screening the available time series by orbit simulation, screening of lunar images and their extraction, calculating the integrated irradiance of the lunar disk, distance correction, and lunar phase correction using the ROLO lunar irradiance model, and finally obtaining the radiation response variation of the visible channel of the FY-2F satellite by linear regression. The results show that the annual attenuation of the scanning radiometer visible probe element of FY-2F is about 1.98%, which is close to the results of other calibration methods; therefore, the effectiveness of this method is proved. The lunar calibration method in this paper can effectively monitor the radiometric response attenuation of the FY-2F satellite and provide a reference for the calibration of the systematic bias of the radiometer.