Fig. 1. Schematic diagram of ground target reconnaissance by UAV photoelectric reconnaissance equipment

Fig. 2. Schematic diagram of intersection of space rays and virtual ellipsoid

Fig. 3. Schematic of curvature radius of prime vertical and measuring rectangular coordinate system

Fig. 4. Flow chart of single-station passive location for ground target

Fig. 5. Diagram of position errors

Fig. 6. Diagram of latitude errors

Fig. 7. Diagram of longitude errors

Fig. 8. Diagram of altitude errors

Fig. 9. Diagram of passive positioning accuracy

Fig. 10. With azimuth angle unchanged, mean values and standard deviations of position errors, latitude errors, longitude errors and altitude errors under different pitch angles

Fig. 11. With pitch angle unchanged, mean values and standard deviations of position errors, latitude errors, longitude errors and altitude errors under different azimuth angles