Fig. 1. The Michelson interferometer with a tilted moving mirror

Fig. 2. The influence of tilted moving mirror on modulation of the interference at different wavelengths

Fig. 3. The influence of tilted moving mirror on modulation of the interference at 2550 cm⁻¹ wavelengths

Fig. 4. Principle block diagram of calibration system

Fig. 5. The principle of one-dimensional angle adjustment.

Fig. 6. Two-dimensional fixed mirror adjusting mechanism

Fig. 7. Large-scale search with low precision

Fig. 8. Small-scale search with low precision

Fig. 9. (a)-(c) The comparison of the peak-to-peak values of the infrared interference signals of LW, MW1 and MW2 by using command-control mode (red) or automatic-control mode (blue); (d) Calibration test under vacuum environment; (e) Evaluation results of NEDT after the automatic calibration test

Fig. 10. (a) The comparison of NEDT by using command-control mode between the satellite and the ground; (b) The comparison of response rate by using command-control mode between the satellite and the ground