Error Analysis on the Thermal Emissive Band Calibration for the MERSI

The remote sensor mounted on the Fengyun-3C (FY-3C) will decay naturally during operation, causing a decrease in accuracy of satellite data. Therefore, an effective monitoring method must be adopted to study performance changes instrument. theoretical expressions absolute and relative errors for earth field view (FOV) radiance together with its equivalent brightness temperature are given by analyzing response value offsets FOV along blackbody (BB) pixel. In order further describe influences different parameters temperature, computer simulations performed, caused offset BB pixel firstly then increase increasing value. increase, error increases while decreases FOV. This research provides important guidance improving on-orbit FY-3C/ MERSI.