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Improving star tracker centroiding performance in dynamic imaging conditions
, 2015 John Enright
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Predictive Centroiding for Star Trackers with the Effect of Image Smear
The Journal of the Astronautical Sciences, 2002Star centroiding, locating the star center in a star image frame, is a fundamental process for any star tracker. In this paper, the approximate locations of the stars in successive image frames are predicted using the angular velocity as provided by a rate gyro, then the centroid is updated based upon local image processing. When the rate gyro data are
Malak A. Samaan +2 more
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Improving Performance Of Star Trackers: Brightness Prediction And Star Centroid Accuracy
2023<p>This research presents two strategies to improve the performance of star trackers for nanosatellite applications. The first strategy is the development of a brightness prediction model with the aim of improving the star catalogue selection during the early stages of star tracker development.
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Optimised centroiding of stars for space applications
2016High precision pointing information is a vital input for the attitude control of space telescopes. This pointing information can be extracted from images by applying centroiding algorithms. Such images may be obtained by dedicated fine guidance sensors or by the science instrument itself.
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Effect of sparse recovery on centroid estimation for star image
The 27th Chinese Control and Decision Conference (2015 CCDC), 2015The compressive sensing (CS) theory has represented an attractive perspective that can effectively reduce the sampling rate of star tracker. The star centroid is the key factor relating the star identification and attitude determination. Naturally, there exists a problem that whether the low sampling rate of star tracker can keep the star centroid as ...
Hang Yin, Xin Song, Ye Yan
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Star point centroid algorithm based on background forecast
SPIE Proceedings, 2014The calculation of star point centroid is a key step of improving star tracker measuring error. A star map photoed by APS detector includes several noises which have a great impact on veracity of calculation of star point centroid. Through analysis of characteristic of star map noise, an algorithm of calculation of star point centroid based on ...
Jin Wang, Rujin Zhao, Nan Zhu
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High accuracy star centroid acquisition method of airborne star sensor during daytime
2016 12th World Congress on Intelligent Control and Automation (WCICA), 2016This paper shows a novel high accuracy star centroid acquisition method for airborne star sensor. Different form aerospace application, airborne star sensor operate in the atmosphere, most of the visible stars are covered by sunlight during daytime.
Hailong Zhu, Bin Liang, Tao Zhang
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Science China Technological Sciences, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jia, Hui +6 more
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Jia, Hui +6 more
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A New Approach to Determine the Centroid of Star Spot for Star Tracker Based on MEMS-Gyro
Key Engineering Materials, 2013Along with the development of MEMS technology, the precision of MEMS-Gyro is increasing and the range of application of MEMS-Gyro is expanding. The accuracy of centroid determination of the spot directly relates to the precision of star tracker, but, when the exposure time is shorter or the satellite is in an unstable state, the noise of detector ...
Nan Chen, Fei Xing, Zheng You
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Star centroid extraction in stray light background for star sensor
International Conference on Signal Image Processing and Communication (ICSIPC 2021), 2021Qing Xu +4 more
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