Fig. 1. Photoelectric response model of CMOS detector

Fig. 2. Influence of exposure adjustment parameters on SNR and digital gray value

Fig. 3. Relationship between image motion velocity and orbital height

Fig. 4. Relationship between exposure time design results and solar zenith angle

Fig. 5. Results of exposure time design

Fig. 6. SNR based on the results of exposure time design

Fig. 7. Exposure process of rolling shutter

Fig. 8. Correspondence of rolling shutter distortion of the two CMOS detectors

Fig. 9. Comparison of images before and after correction of rolling shutter distortion （from left to right are the original image， distorted image and corrected image）