Synodic Period

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

The time for the Sun-Earth-Moon system to return to the same relative configuration, approximately 29.5 days. In cislunar SDA, it serves as the natural timescale for evaluating target tracking uptime. All simulations in this paper span a full synodic period.

Application Value

This术语在地月空间任务的设计、分析和控制中具有important应用价值，为相关技术领域的研究和工程实践provides理论支撑。

Related Concepts

• 地心天体参考框架（Geocentric Celestial Reference Frame）
• 运行轨道库（Operational Orbit Library）
• 内部频率（Inner Frequencies）
• 准周期远距离逆行轨道（Quasi-Periodic Distant Retrograde Orbit, QPDRO）

References

• Thornton et al. 2022, §3, §4.2
• Vendl和Holzinger - 2021 - Cislunar periodic orbit analysis for persistent space object detection capability
• Spreen 2021
• 肖峰 - 1989 - 球面天文学与天体力学基础
• Gómez 等 - 2001
• Vepa - 2024 - Space vehicle maneuvering, propulsion, dynamics and control