X-ray pulsars
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Autonomous orbit determination and timekeeping in lunar distant retrograde orbits by observing X-ray pulsars
Jiangkai Liu, Wenbin Wang, Hao Zhang, Leizheng Shu and Yang Gao- NAVIGATION: Journal of the Institute of Navigation December 2021, 68 (4)687-708;
- DOI: https://doi.org/10.1002/navi.451