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http://dx.doi.org/10.5139/JKSAS.2012.40.9.818

A study on the Computational Efficiency Improvement for the Conjunction Screening Algorithm  

Kim, Hyoung-Jin (과학기술연합대학원대학교 위성시스템 및 활용공학 전공)
Kim, Hae-Dong (한국항공우주연구원, 과학기술연합대학원 대학교)
Seong, Jae-Dong (과학기술연합대학원대학교 위성시스템 및 활용공학 전공)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.40, no.9, 2012 , pp. 818-826 More about this Journal
Abstract
In this paper, the improvement methods of the computational efficiency of the conjunction screening algorithm, which calculates the closest distance between primary satellite and space objects are presented. First method is to use GPU(Graphics Processing Unit) that has high computing power and handles quickly large amounts of data. Second method is to use Apogee/Perigee filter which excludes non-threatening objects that have low probability of collision and/or minimum distance rather than that of thresh hold. Third method is to combine first method with second method. As a result, the computational efficiency has been improved 34 times and 3 times for the first method only and second method only, respectively. On the contrary, the computational efficiency has been dramatically improved 163 times when two kinds of methods are combined.
Keywords
Space Debris; Conjunction Screening; GPU(Graphics Processing Unit); Computational Efficiency;
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