Two-Phase Transfer
Author: Tianjiang Shuo
Website: https://cislunarspace.cn
Definition
A design strategy that divides the Earth-moon low-thrust transfer mission into two phases. The first phase raises altitude from LEO to GEO, where third-body effects are weak and the classical shape function suffices. The second phase transfers from GEO to L1, where both primaries exert comparable gravity, requiring the modified shape function. The two phases satisfy position and flight-path angle continuity at the junction.
Application Value
两段式转移是地月空间轨道设计中的重要参考轨型，可用于目标轨道选择和转移方案设计 在实际任务中，基于两段式转移的轨道设计能够满足特定的任务约束，如通信仰角、覆盖范围和燃料最优等要求 利用两段式转移的特性，可以优化转移轨道设计，实现从地球到月球的高效转移 两段式转移为月球探测任务提供了多样化的轨道选择方案，有助于任务的灵活规划
Related Concepts
References
- Vellutini & Avanzini, 2014, Shape-based design of low-thrust trajectories to cislunar lagrangian point