Nonspherical Lunar Gravity

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

The deviation of the Moon's gravity field from a perfect sphere, modeled by spherical harmonic expansion. For orbits with low perilune altitude (e.g., NRHOs), NSLG perturbations significantly increase station-keeping cost. For distant orbits (e.g., DROs, halos), the effect is negligible.

Application Value

This term has significant practical applications in cislunar mission planning and execution.

  • Hidden-Genes Genetic Algorithm, HGGA
  • Variable-Size Design Space, VSDS
  • Station-Keeping
  • Target Point Method

References

  • Zhang et al., 2022
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Contributors: ouyangjiahong, Ou Yang Jiahong