Accuracy Analysis of Centroid Detection Method Used to Star Sensor

Abstract:

Star sensor is important equipment for measuring satellite attitude and motion, and star centroid detection accuracy is the basis of the overall accuracy of star sensor. In star sensors, slightly- defocus method is often adopted to acquire dispersive light spots so as to facilitate centroid detection, and certain motion blur can also be introduced because of the motion of satellites. In this paper, we analyzed several commonly-used centroid detection algorithms by using simulation experiment to study the influence of defocus and motion parameters on the accuracy of centroid detection algorithm and provided acceptable parameter value ranges.

• Periodical: Advanced Materials Research (Volumes 468-471)
• Pages: 401-404
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.468-471.401
• Online since: February 2012
• Authors: Qi Li, Wei Xu, Zhi Hai Xu, Hua Jun Feng
• Keywords: Centroid Detection, Ellipse Fitting Method, Grayscale-Based Centroid Method, Motion Measurement, Star Sensor

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