Fig. 1. 10 channels cold space sampling points of VIRR

Fig. 2. Visible channel image of VIRR

Fig. 3. Image of VIRR infrared channel

Fig. 4. (a) Diagram of radiometer spatial scanning geometry, (b) radiometer signal acquisition angle position diagram

Fig. 5. Simulation of orbit position of earth, sun and moon

Fig. 6. Simulation of the angle between the moon and the nadir of scan radiometer

Fig. 7. Time simulation of the moon appearing in cold space in one year period of satellite operation

Fig. 8. Phase diagram of the moon observed by VIRR (a) Descent orbit 13:05, March 1, 2012, (b) ascent orbit 21:05 ,March 4, 2012

Fig. 9. Geometry diagram of 45° rotating scanning mirror scanning

Fig. 10. Diagram of channel registration and sampling sequence

Fig. 11. Diagram of FOV registration in image rotation

Fig. 12. Registration relationship of each FOV after image rotation and sampling sequence processing

Fig. 13. Cold space sampling image of each channel

Fig. 14. Scanning line position diagram of flight direction of CH7, 9, 6, 2 at lunar observation time

Fig. 15. Diagram of DC recovery circuit

Fig. 16. Earth area image of visible channel 1, (a)before data correction, (b)after data correction

Fig. 17. Earth area image of IR channel 4