Imaging Components, Systems, and Processing

Kinematic model for the space-variant image motion of star sensors under dynamical conditions

[+] Author Affiliations
Chao-Shan Liu

Xi’an Research Institute of High Technology, Department of Control Science and Engineering, No. 2 Tongxin Road, Hongqin Town, Xi’an 710025, China

Xi’an Research Institute of High Technology, College of Science, No. 2 Tongxin Road, Hongqin Town, Xi’an 710025, China

Lai-Hong Hu, Guang-Bin Liu, Bo Yang

Xi’an Research Institute of High Technology, Department of Control Science and Engineering, No. 2 Tongxin Road, Hongqin Town, Xi’an 710025, China

Ai-Jun Li

Xi’an Research Institute of High Technology, College of Science, No. 2 Tongxin Road, Hongqin Town, Xi’an 710025, China

Opt. Eng. 54(6), 063104 (Jun 12, 2015). doi:10.1117/1.OE.54.6.063104
History: Received January 9, 2015; Accepted May 19, 2015
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Abstract.  A kinematic description of a star spot in the focal plane is presented for star sensors under dynamical conditions, which involves all necessary parameters such as the image motion, velocity, and attitude parameters of the vehicle. Stars at different locations of the focal plane correspond to the slightly different orientation and extent of motion blur, which characterize the space-variant point spread function. Finally, the image motion, the energy distribution, and centroid extraction are numerically investigated using the kinematic model under dynamic conditions. A centroid error of eight successive iterations <0.002 pixel is used as the termination criterion for the Richardson-Lucy deconvolution algorithm. The kinematic model of a star sensor is useful for evaluating the compensation algorithms of motion-blurred images.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Chao-Shan Liu ; Lai-Hong Hu ; Guang-Bin Liu ; Bo Yang and Ai-Jun Li
"Kinematic model for the space-variant image motion of star sensors under dynamical conditions", Opt. Eng. 54(6), 063104 (Jun 12, 2015). ; http://dx.doi.org/10.1117/1.OE.54.6.063104


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