Lunar Exclusion Angle

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

The minimum angular separation between the Moon and a target below which a sensor ceases observation due to lunar stray light overwhelming the target signal. This paper demonstrates LEA is the dominant variable for tracking uptime: reducing LEA from 5 deg to 1 deg increases trackable time from near-zero to ~50% of the synodic period for L2 Halo targets.

Application Value

This concept has important application value in cislunar space research and mission design.

  • Space Surveillance Network
  • Space-Based Space Surveillance
  • EU Space Surveillance and Tracking

References

  • Thornton et al. 2022, §1, §2.2, §4, §5
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Contributors: ouyangjiahong, Ou Yang Jiahong