Fig. 1. Wireless UV guidance system

Fig. 2. Schematic of semi-spherical UV LEDs

Fig. 3. Diagram of UV-guided UAV matching terrain flight

Fig. 4. UV line-of-sight communication link model^[12]. (a) LOS(a); (b) LOS(b); (c) LOS(c)

Fig. 5. Diagram of UV-beacon and UAV communication

Fig. 6. Wireless ultraviolet terrain matching. (a) Simulation of slope; (b) simulation of undulating terrain

Fig. 7. Relation between height and power ratio under flat terrain

Fig. 8. Relation between transmission angle and power ratio under flat terrain

Fig. 9. Relation between azimuth angle and power ratio under clinoform

Fig. 10. Relation between height and power ratio under clinoform

Fig. 11. Relation between transmission angle and power ratio under clinoform. (a) Height is different; (b) height is the same

Fig. 12. Relation between azimuth angle and power ratio under mountain terrain

Fig. 13. Relation between height and power ratio under mountain terrain

Fig. 14. Relation between transmission angle and power ratio under mountain terrain