Analysis of influence of LEO staring satellite dynamic tracking on imaging

Yang Xiubin; Lin Xingchen

In order to achieve a clear dynamic staring imaging, the imaging model of satellite real-time imaging to track the target was designed, body posture angular velocity relative orbital coordinate system were designed when satellite staring imaging, the coordinate transformation method was used to real-time compute the time of the line transfer process in the gazing, the method of Monte Carlo was used to statistical calculate the influence of imaging under the satellite's attitude point precision and stability in the mode of staring-imaging. Finally, the CMOS prototype and the minitype three-axis air bearing table constructed for attitude control were used to simulate the digital domain CMOS staring imaging.The results show that in the satellite staring imaging process, the integration time in the image plane which caused by satellite attitude change and attitude dynamic tracking is greater than the accuracy of the detector, analysis and simulation results show, in order to meet shift of less than or equal to the detection element size requirements, simulation platform dynamic tracking accuracy better than 0.002()/s, can achieve satellite getting 2 m clear resolution dynamic imaging in 500 km.

1. National & Local United Engineering Research Center of Small Satellite Technology,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China

Received Date: 2014-10-19

Rev Recd Date: 2014-11-15

Publish Date: 2015-01-25

Key words:

CMOS /
staring-imaging /
MTF /
SNR

Abstract: In order to achieve a clear dynamic staring imaging, the imaging model of satellite real-time imaging to track the target was designed, body posture angular velocity relative orbital coordinate system were designed when satellite staring imaging, the coordinate transformation method was used to real-time compute the time of the line transfer process in the gazing, the method of Monte Carlo was used to statistical calculate the influence of imaging under the satellite's attitude point precision and stability in the mode of staring-imaging. Finally, the CMOS prototype and the minitype three-axis air bearing table constructed for attitude control were used to simulate the digital domain CMOS staring imaging.The results show that in the satellite staring imaging process, the integration time in the image plane which caused by satellite attitude change and attitude dynamic tracking is greater than the accuracy of the detector, analysis and simulation results show, in order to meet shift of less than or equal to the detection element size requirements, simulation platform dynamic tracking accuracy better than 0.002()/s, can achieve satellite getting 2 m clear resolution dynamic imaging in 500 km.

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Analysis of influence of LEO staring satellite dynamic tracking on imaging

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