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

Chao-Shan Liu; Lai-Hong Hu; Guang-Bin Liu; Bo Yang; Ai-Jun Li

doi:10.1117/1.OE.54.6.063104

12 June 2015 Kinematic model for the space-variant image motion of star sensors under dynamical conditions

Chao-Shan Liu, Lai-Hong Hu, Guang-Bin Liu, Bo Yang, Ai-Jun Li

Author Affiliations +

Optical Engineering, Vol. 54, Issue 6, 063104 (June 2015). https://doi.org/10.1117/1.OE.54.6.063104

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.

Citation Download 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," Optical Engineering 54(6), 063104 (12 June 2015). https://doi.org/10.1117/1.OE.54.6.063104

Published: 12 June 2015

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