基于TLE的低轨巨星座控制研究

THE CONTROL OF MEGA-CONSTELLATION AT LOW EARTH ORBIT BASED ON TLE

  • 摘要: 近几年来,美国SpaceX, OneWeb等创新型企业纷纷计划打造低轨巨型卫星星座,引发卫星互联网的发展热潮。本文利用公开的两行轨道根数(two-line element, TLE)对国外星座控制策略进行分析,重点分析了铱星、一网、星链星座的控制规律。通过相对相位偏差分析,反演得到星座中不同卫星之间的平半长轴差,避免了小控制量条件下难以通过平半长轴判断卫星是否进行了轨控的问题。获得了国外星座控制频次和控制精度等重要信息,所得结论能够为我国未来互联网星座的建设提供参考。

     

    Abstract: Many innovative enterprises, such as SpaceX and OneWeb, recently released plans building satellite mega-constellations at the low earth orbit, thus triggering a boom in the development of Satellite Internet. The public two-line element (TLE) is used in this paper to analyze the control strategy of the foreign constellations, including Iridium, OneWeb and StarLink. The mean semimajor axis difference of different satellites in the constellation is obtained by the relative phase difference analysis, to avoid the difficulty of estimating the maneuver of the satellite by the mean semimajor axis variation when the control value is small. Essential parameters like the orbital station keeping frequency and the control accuracy of foreign constellations are obtained. The conclusions obtained will provide a reference for the construction of the Internet constellation in our country.

     

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