Radiometric Calibration of FY-2C Meteorological Satellite and Its Result Analysis

The principle and method of ground vacuum radiometric calibration,satellite-borne black body calibration,and calibration of the ground radiometric correcting field for infrared and water vapor channels of the scanning radiometer for FY-2C meteorological satellite were introduced in this paper,and so were the principle and methods of ground solar calibration,integral sphere calibration,calibration of the ground radiometric correcting field,and solar image.The calibration results for different channels gained by various methods were presented.The analysis showed that the calibration method adopted in C satellite was effective,which could be used as supplement and approval for each other.The improvements such as environment temperature simulation,second curve fitting,error decreasing of integral sphere calibration and spectrum response would be used to high calibration precision in future.