Energy-Descent L₁ Transfer

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

A transfer strategy for sending end-of-life GEO satellites to the Moon: low-thrust raises the satellite from GEO into a low-energy cislunar transfer, then low-thrust in the lunar region progressively reduces the spacecraft's energy (increases Jacobi energy) until the neck closes for permanent capture. The free-flying segment leverages natural dynamics to save fuel.

Application Value

This term is widely used in cislunar transfer trajectory design to optimize transfer trajectories and reduce delta-V consumption. When designing cislunar space missions, engineers can leverage this concept to evaluate performance differences among various orbits and select the optimal solution that meets mission constraints. It also supports feasibility analysis of orbital maneuver schemes and aids in mission planning and decision-making.

References

  • Liang et al. 2016
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Contributors: ouyangjiahong, Ou Yang Jiahong