Attitude Accuracy Pointing: 0.3″(3σ) Rolling: 5″(3σ) Dynamic Range @ 0.1°/s: 0.3″(Pointing, 3σ); 5″(Rolling, 3σ)； @0.5°/s: 1″(Pointing, 3σ); 15″(Rolling, 3σ)； @1.0°/s: 1.5″(Pointing, 3σ); 20″(Rolling, 3σ)； @ 1.5°/s: follow up Field of View ≥5.5°×5.5° Update Rate ≥10Hz Acquisition Rate Max. ≤2s Start-up Time Better than 5s Exclusive Angle Sun:better than 30°； Timing Accuracy ±1μs @ synchronization pulse（PPS Signal） Quaternion Continuity the scalar of quaternion: non-negative Communication RS422 Image Output Cameralink Life Time 7years @LEO Orbit Reliability ≥0.98 @ the end of 7 years running