approach phase
Author: Tianjiang Shuo
Website: https://cislunarspace.cn
Definition
The flight segment in an Earth-Moon free-return trajectory where the spacecraft approaches the Moon from the transfer trajectory to the landing point. The paper divides this phase into a main elliptical arc and a pseudostate return arc, solving the main arc velocity via Lambert's problem and computing the return arc terminal state through pseudostate theory for high-precision rapid computation.
Application Value
The approach phase plays a significant role in cislunar space mission design, analysis, and control. In orbital design, it can be leveraged for transfer trajectory optimization; in navigation and control, it improves mission execution precision and reliability; in system analysis, it facilitates deeper understanding of complex multi-body dynamical behavior, guiding mission planning and risk assessment.
Related Concepts
- Football Orbit
- Orbit Chain
- Prograde Polar Orbit
- 偏心倾角矢量分离（Eccentricity/Inclination Vector Separation）
References
- 丁百慧 等 - 2023 - 载人月球探测任务转移轨道及月面着陆区评估分析