Acta Photonica Sinica, Volume. 52, Issue 6, 0611001(2023)
Current Status and Development Tendency of Image Motion and Compensation About Space Based on Optical Imaging System（Invited）
Figures & Tables(31)
Fig. 1. The influence of image motion on space remote sensing image
Fig. 2. Worldview-2 image of the Fukushima Daiichi nuclear power plant
Fig. 4. The influence of image motion on space target for space-based imaging
Fig. 7. Difference of integral time between edge and center positions of camera of focal plane under different satellite view angles
Fig. 8. Influence of platform vibration on simulation image of optical remote sensor
Fig. 11. GFDM-1 satellite impact link of micro-vibration to imaging quality
Fig. 16. Residual power spectrum after the precision image stabilization system
Fig. 17. The diagram of precision image stabilization verification system
Table 1. Technical index of JL-1 satellite
View tableView in ArticleTable 1. Technical index of JL-1 satellite
Parameters Requirement Orbit altitude/km 656（sun-synchronous orbit） Spatial resolution/m ≤0.72（panchromatic） ≤2.88（multispectral） Width/km ≥11.6 Continuous imaging time/s 400 Maximum angle of yaw/（°） Work mode Push-broom，wide-angler roller piece and stereo imaging
Table 2. MTF and the difference of integral time between edge and center positions when the integral time is set separately
View tableView in ArticleTable 2. MTF and the difference of integral time between edge and center positions when the integral time is set separately
View angle Integral time series Integral time difference（before） Integral time difference（after） MTF of edge position 30° 48 0.81% 0.26% 0.994 45° 48 2.4% 0.82% 0.938
Table 3. the relationship between integral time series and integral time frequency
View tableView in ArticleTable 3. the relationship between integral time series and integral time frequency
Integral time relative change rate Integral time series Image move Integral time frequency demand 8×10-3 48 0.02（pixel） >20 Hz 8×10-3 24 0.02（pixel） >10 Hz 8×10-3 92 0.02（pixel） >40 Hz
Table 4. Technical index of the satellite and the camera
View tableView in ArticleTable 4. Technical index of the satellite and the camera
Parameters Requirement Orbit altitude/km 600（sun-synchronous orbit） Camera focal length/m 2 Off-axis angle/（°） 6.5 Spatial resolution/m ≤2.62（panchromatic） Maximum angle of yaw/（°） Work mode Push-broom，wide-angler roller Piece and stereo imaging
Table 5. the relationship between MTF decline demands and attitude stability
View tableView in ArticleTable 5. the relationship between MTF decline demands and attitude stability
MTF decline Level off imaging
attitude stability
40° pitching imaging
attitude stability
40° rolling imaging attitude stability 0.05 0.002 7°/s 0.001 5°/s 0.001°/s 0.06 0.004 6°/s 0.003°/s 0.002 8°/s 0.07 0.006°/s 0.004 5°/s 0.004 3°/s
Table 6. Technical index of JWST
View tableView in ArticleTable 6. Technical index of JWST
Parameters Requirement Diameter/m 6.5 Focal length/m 30 Angle resolution/″ 0.1
Table 7. Key parameters of FGS
View tableView in ArticleTable 7. Key parameters of FGS
Parameters Requirement LOS stability/″ 0.2 FGS detection precision/″ 0.02 FGS frame frequency/Hz ≥100 FSM angle resolution/″ 0.02 PZT position resolution/nm 16 FSM rotate range System bandwidth/Hz 8（optic closed-loop）
Table 8. Key parameters′ conformities of precision image stabilization system
View tableView in ArticleTable 8. Key parameters′ conformities of precision image stabilization system
Parameters Design target Realization target Conformity LOS stability/″ 0.2 0.02 Simulated FGS detection precision/″ 0.02 0.004 4 Calculated FGS frame frequency/Hz ≥100 110 Measured FSM angle resolution/″ 0.02 0.001 Calculated PZT position resolution/nm 16 0.6 Measured PZT voltage resolution/mV 26.9 0.5 Measured FSM rotate range/″ Measured System bandwidth/Hz 8（optic closed-loop） 16 Simulated
Table 9. Test result of MTF
View tableView in ArticleTable 9. Test result of MTF
Test number Test condition Simulator rotate speed/（°·s-1） Horizontal frenquency MTF tested 1 Orbit altitude and velocity adaptived 80 5 975.245 0.140 2 Precision orbit determination 1 km
Precision velocity determination 1 km/s
80 5 952.381 0.127 3 Precision orbit determination 2 km
Precision velocity determination 2 km/s
80 5 927.180 0.122 4 Precision orbit determination 3 km
Precision velocity determination 3 km/s
80 5 907.173 0.113
Table 10. Dynamic MTF test value
View tableView in ArticleTable 10. Dynamic MTF test value
Test number Integral series Dynamic MTF（adaptive image motion） Dynamic MTF（calculated image motion） Image motion matching MTF 1 8 0.112 0.110 0.982 2 16 0.107 0.102 0.953 3 32 0.105 0.101 0.962 4 48 0.104 0.102 0.981 5 64 0.109 0.108 0.991 6 96 0.108 0.104 0.963
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Wei HAO, Peipei YAN, Zhiguo LI, Zhiyuan CHENG, Wenji SHE. Current Status and Development Tendency of Image Motion and Compensation About Space Based on Optical Imaging System（Invited）[J]. Acta Photonica Sinica, 2023, 52(6): 0611001
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Received: Nov. 10, 2022
Accepted: Mar. 24, 2023
Published Online: Jul. 27, 2023
The Author Email: YAN Peipei (yppoptics@163.com)
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