Transfer to Distant Retrograde Orbits via Rideshare to Sun–Earth L1 Point

2021 ◽  
pp. 1-6
Author(s):  
Khashayar Parsay ◽  
David C. Folta
Keyword(s):  
Distant Retrograde Orbits

Coverage Analysis of Lunar Communication/Navigation Constellations Based on Halo Orbits and Distant Retrograde Orbits

2020 ◽  
Vol 73 (4) ◽  
pp. 932-952
Author(s):  
Zhao-Yang Gao ◽  
Xi-Yun Hou
Keyword(s):  
Lunar Surface ◽  
Polar Regions ◽  
The Moon ◽  
Halo Orbits ◽  
Satellite Constellation ◽  
The North ◽  
Polar Caps ◽  
Distant Retrograde Orbits ◽  
Distant Retrograde Orbit ◽  
South Polar

AbstractWith 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 99·8% 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.

scholarly journals A Fealsible Strategy for Building Distant Retrograde Orbits

2019 ◽  
Vol 1365 ◽  
pp. 012031
Author(s):  
Saymon H. S. Santana ◽  
Cristiano F. De Melo ◽  
Elbert E. N. Macau
Keyword(s):  
Distant Retrograde Orbits

Mission analysis for Earth to Mars-Phobos distant Retrograde Orbits

2018 ◽  
Vol 151 ◽  
pp. 761-771 ◽  
Author(s):  
Davide Conte ◽  
David B. Spencer
Keyword(s):  
Mission Analysis ◽  
Distant Retrograde Orbits

Transfer to Distant Retrograde Orbits Using Manifold Theory

2007 ◽  
Vol 30 (5) ◽  
pp. 1261-1267 ◽  
Author(s):  
Jacob Demeyer ◽  
Pini Gurfil
Keyword(s):  
Distant Retrograde Orbits ◽  
Manifold Theory
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