Terrestrial Segment Constellation

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

The terrestrial-coverage portion of an Earth-Moon communication constellation. Deployed on unstable L3 halo orbits, the segment provides line-of-sight relay between the Earth and Moon, enabling continuous communication for terrestrial locations that cannot directly see the Moon. A 6-satellite design achieves 100% communication availability for approximately 97% of terrestrial users.

Application Value

This term has significant application value in cislunar space missions。In the orbital design phase, engineers use relevant theories for trajectory optimization；In navigation and orbit determination, it is used to improve measurement accuracy；In attitude control and orbit maintenance tasks, it ensures stable spacecraft operation。In practical applications, parameter optimization and algorithm adaptation can be combined with mission requirements to improve mission success rate and resource utilization efficiency。

  • On-orbit Debris Removal
  • Deployment Strategy
  • On-orbit Reconfiguration

References

  • Conti and Circi, 2025, Design of halo orbit constellation for lunar global positioning and communication services
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Contributors: ouyangjiahong, Ou Yang Jiahong