Position Angle

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

The angular position of a spacecraft relative to the line connecting the two primary bodies in the synodic coordinate system. The triangular libration point L₄ corresponds to a position angle of 60°, and the deviation Δλ characterizes the spacecraft's drift from the libration point.

Application Value

This concept plays an important role in cislunar space mission design and orbital dynamics analysis.

References

  • 刘林和刘慧根 - 2008 - 地月系中探测器定点在三角平动点附近的位置漂移及其控制问题
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Contributors: ouyangjiahong, Ou Yang Jiahong