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
Detector | 9_1 | 9_2 | 9_3 | 9_4 | 10_1 | 10_2 | 10_3 | 10_4 |
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Sample | 141 522 | 81 718 | 131 138 | 68 654 | 175 645 | 132 676 | 174 765 | 127 178 | COR | 0.962 28 | 0.798 95 | 0.527 85 | 0.612 16 | 0.049 30 | 0.519 17 | 0.303 11 | 0.752 28 | SSR | 0.001 01 | 0.000 88 | 0.001 13 | 0.000 68 | 0.024 81 | 0.020 82 | 0.024 95 | 0.001 28 | CST | 14 | 14 | 14 | 14 | 0 | 7 | 7 | 7 |
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Table 1. Parameters for eight detectors of two bands of response repair model
Method | Band_9 | Band_10 |
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PSNR | 32 | 27 | NU | 0.061 | 0.098 |
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Table 2. Parameters for eight detectors of two bands of response repair model