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Optical Engineering

Kinematic model for the space-variant image motion of star sensors under dynamical conditions
Author(s): Chao-Shan Liu; Lai-Hong Hu; Guang-Bin Liu; Bo Yang; Ai-Jun Li
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Paper 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.

Paper Details

Date Published: 12 June 2015
PDF: 11 pages
Opt. Eng. 54(6) 063104 doi: 10.1117/1.OE.54.6.063104
Published in: Optical Engineering Volume 54, Issue 6
Show Author Affiliations
Chao-Shan Liu, Xi'an Research Institute of High Technology (China)
Lai-Hong Hu, Xi'an Research Institute of High Technology (China)
Guang-Bin Liu, Xi'an Research Institute of High Technology (China)
Bo Yang, Xi'an Research Institute of High Technology (China)
Ai-Jun Li, Xi'an Research Institute of High Technology (China)

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