Fig. 1. System composition

Fig. 2. Process of space target automatic measurement system

Fig. 3. Schematic diagram of stepped range search

Fig. 4. Schematic diagram of spiral scan search

Fig. 5. Target observable period before optimization

Fig. 6. Optimized target observation plan

Fig. 7. Spiral search offset curves. (a) Three-dimensional curve; (b) two-dimensional curve

Fig. 8. Spiral search offset speed and acceleration curves. (a) Velocity curve; (b) acceleration curve

Fig. 9. Search offset and guidance data of spiral search algorithm (40135). (a) Spiral search azimuth offset; (b) spiral search elevation offset; (c) spiral search offset; (d) first order difference of coder

Fig. 10. Search offset and guidance data of step search algorithm (43005). (a) Step search azimuth offset; (b) step search elevation offset; (c) step search offset; (d) first order difference of coder