| |||
| tracking system (a closed-loop system uses the detected error-angle information to electromechanically drive the optical axis toward the line of sight) | |||
| servo system; follow-up system | |||
| |||
| tracking system (a closed-loop system uses the detected error-angle information to electromechanically drive the optical axis toward the line of sight) | |||
| servo system; follow-up system | |||
