Coverage Analysis of Lunar Communication/Navigation Constellations Based on Halo Orbits and Distant Retrograde Orbits
Coverage Analysis of Lunar Communication/Navigation Constellations Based on Halo Orbits and Distant Retrograde Orbits
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基于晕轨道和远逆行轨道的月球通信/导航星座覆盖分析
DOI：
10.1017/s0373463320000065
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发表时间：
2020-07-01
影响因子：
2.4
通讯作者：
Hou, Xi-Yun
中科院分区：
文献类型：
--
作者：
Gao, Zhao-Yang;Hou, Xi-Yun
随着越来越多的绕月任务，绕月通信/导航星座是必要的。晕圈轨道由于其独特的几何形状，研究人员为此目的进行了广泛的研究。在这项工作中进行了专门的调查，以分析晕轨道的覆盖能力。据发现，一个两颗卫星的星座是足够的连续一倍覆盖北极或南极地区，但从来没有两个。一个三颗卫星的星座足以对北极和南极地区进行连续的双重覆盖。一个由四颗卫星组成的星座可以覆盖几乎100%的月球表面。此外，本文还首次分析了另一种特殊轨道--远距离逆行轨道（DRO）的覆盖能力。研究发现，三颗探测卫星可以覆盖月球表面99个中心点，覆盖率为8%，在极冠处有覆盖缺口。一个在空间轨道上运行的四颗卫星星座几乎可以覆盖整个月球表面。将Halo轨道与DRO卫星相结合，设计了一个由3颗Halo轨道卫星和2颗DRO卫星组成的5星星座。这个星座可以提供100%连续的一次覆盖整个月球表面。
With more and more missions around the Moon, a communication/navigation constellation around the Moon is necessary. Halo orbits, due to their unique geometry, are extensively studied by researchers for this purpose. A dedicated survey is carried out in this work to analyse the coverage ability of halo orbits. It is found that a two-satellite constellation is enough for continuous one-fold coverage of the north or the south polar regions but never both. A three-satellite constellation is enough for continuous one-fold coverage of both north and south polar regions. A four-satellite constellation can cover nearly 100% of the whole lunar surface. In addition, the coverage ability of another special orbit - distant retrograde orbit (DRO) - is analysed for the first time in this study. It is found that three satellites on DROs can cover 99 center dot 8% of the lunar surface, with coverage gaps at polar caps. A four-satellite constellation moving on spatial DROs can cover nearly the whole lunar surface. By combining halo orbits and DROs, we design a five-satellite constellation composed of three halo orbit satellites and two DRO satellites. This constellation can provide 100% continuous one-fold coverage of the whole lunar surface.