Fig. 1. Working principle diagram of COCTS

Fig. 2. Sample order of electronics during 360° scanning period of HY-1B COCTS

Fig. 3. The variation of blackbody signal and cold space signal with latitude

Fig. 4. The variation relationship of recalibration coefficient and code value of Pt resistance with time for response repair model （a）Fitting result band 9 1st detector at A station, （b）fFitting result of band 10 4st detector at A station

Fig. 5. Probability distribution for nonuniform correction model （a）Probability distribution for band 9 detectors at A station, （b）probability distribution for band 10 detectors at A station

Fig. 6. Nonuniform correction and fitting curve of probability distribution of code value for band 9 image over Bohai Bay （a）Origin image, （b）repair image, （c）repair-correction image, （d）fitting curve of probability distribution of detectors for origin image, （e）fitting curve of probability distribution of detectors for repair image, （f）fitting curve of probability distribution of detectors for repair-correction image

Fig. 7. Variation of temperatures as longitude and latitude for band 9 and 10 over the Bohai Bay （a）Variation of temperatures as longitude for band 9, （b）variation of temperatures as longitude for band 10, （c）variation of temperatures as latitude for band 9, （d）variation of temperatures as latitude for band 10

Fig. 8. Variation of temperatures as time for band 9 and 10 over the Bohai Bay （a）Variation of temperatures in 2015 for band 9, （b）variation of temperatures in 2015 for band 10, （c）variation of temperatures in Jun and Dec as years for band 9, （d）variation of temperatures in Jun and Dec as years for band 10