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多轨道月球GNSS星座设计,与遥远的逆行轨道和光环轨道的组合轨道
K Wang1, Kezhao Li2,3, Shuaikang Lv1
1School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo, 454000, China.
Scientific reports
|June 22, 2023
概括
使用Halo和远逆轨道 (DRO) 的新型多轨道月球全球导航卫星系统 (GNSS) 为导航和定位提供了完整的月球表面覆盖. 这种优化的星座需要更少的卫星来提供可靠的月球定位服务.
科学领域:
- 太空科学 太空科学
- 卫星系统工程 卫星系统工程
- 导航和定位技术 导航和定位技术
背景情况:
- 月球的接近和资源使其成为深空探索的关键目标.
- 建立一个可靠的月球全球导航卫星系统 (GNSS) 对月球任务至关重要.
- 现有的卫星系统在提供全面的月球表面覆盖方面面临着挑战.
研究的目的:
- 为GNSS分析不同月球点轨道 (LPOs) 的覆盖能力.
- 建议和评估一个多轨道的月球GNSS星座,以加强PNT服务.
- 为了确定一个最佳的星座设计,以完全覆盖月球表面和精确定位.
主要方法:
- 对光环轨道和远逆行轨道 (DRO) 的覆盖特性分析.
- 设计和模拟多轨道月球GNSS星座,结合DRO和Halo轨道.
- 对不同星座设计的覆盖范围,定位精度 (PDOP) 和隐蔽效应进行比较.
主要成果:
- 环球轨道提供更好的极地覆盖,而DRO则提供稳定的赤道覆盖.
- 联合DRO和Halo轨道星座实现了100%的月球表面覆盖,使用的卫星数量最小.
- 拟议的星座确保至少有4颗可见卫星,并保持稳定的位置稀释精度 (PDOP) 在2.0以下.
结论:
- 一个多轨道的月球GNSS星座对于月球探测是可行的和有效的.
- 优化了DRO和Halo轨道的组合,显著提高了卫星系统的效率和覆盖范围.
- 开发的星座符合未来月球任务的严格导航和定位要求.
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