Fig. 1. Overall structure diagram of optical simulator

Fig. 2. Device connection relationship of optical simulator

Fig. 3. Workflow chart of optical simulator

Fig. 4. Variable definition for calculating pixel illuminance of screen

Fig. 5. Optical principle of optical simulator

Fig. 6. Flow chart of star map simulation software design^[23]

Fig. 7. Star map without device noises

Fig. 8. Star map with device noises

Fig. 9. Comparison diagram of star point position before and after geometric calibration

Fig. 10. Definition of car in Cartesian coordinate system

Fig. 11. Geometrical relationship of LoS measurement

Fig. 12. Physical model of optical simulator

Fig. 13. Estimation errors of angles-only navigation filter before and after geometric calibration of optical simulator