| 摘要: |
| 针对导航星座自主定轨中的UT1-UTC预报误差,分析了其对星座定轨的影响，并对预报精度进
行了仿真；给出了基于锚固站的定轨算法，并使用Walker12/3/1星座进行了仿真。结果表明：
UT1-UTC预报误差对星座定轨精度影响较大，107 ms的预报误差将引入168 m的星座位置误差
；引入锚固站后，这一影响被有效抑制，抑制效果随锚固站测量精度的提高而增强。 |
| 关键词: 导航星座 协调世界时 锚固站 自主定轨 预报误差 |
| DOI： |
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| 基金项目: |
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| Mitigation technique of UT1-UTC prediction error based on anchor ground station |
| MENG Fan-zhi,WANG Cheng-yu,LIU Wen-xiang,OU Gang |
| () |
| Abstract: |
| The UT1-UTC prediction error is one of the error sources in the autonomous orbit
determination of navigation constellation.Its influence is analyzed and its pr
ediction accuracy is simulated.The algorithm of orbit determination is presen
ted based on the anchor ground station.Simulations are executed with the Walke
r12/3/1 constellation.The results indicate the prediction error largely influenc
es the constellation accuracy.The prediction error of 107 ms brings the constell
ation position error of 168 m.While using the anchor,this influence is effective
ly mitigated,and the mitigation effect is increased with the improved accuracy of
the anchor's measurement. |
| Key words: navigation constellation coordinated universal time anchor ground station autonomous orbit determinatio
n prediction error |
