L2 Point Relay Communication

Author: Tianjiang Shuo Website: https://cislunarspace.cn

Definition

Continuous communication between Earth and the lunar far side using relay satellites in orbits near the Earth-Moon L2 point. Satellites on L2 Halo orbits maintain unobstructed two-way links to both Earth and the lunar far side, forming a critical communication architecture for far-side landing missions.

Application Value

In lunar far-side landing missions, L2 Halo orbit relay satellites maintain continuous communication with both Earth and the lunar far side, serving as critical infrastructure for Chang'e-4 and other far-side exploration missions. Mission designers utilize the L2 relay communication architecture to plan landing sequences, ensuring that far-side probes maintain constant contact with ground control.

Related Concepts

• 月球中继卫星系统（Lunar Relay Satellite System, LRSS）
• 天基测控站（Space-based Tracking Station）
• 双向相干多普勒（Two-Way Coherent Doppler）

References

• 曾豪等, 2022, 面向载人月球探测的三体周期轨道应用方案分析