Principal Axes Coordinate Frame

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

A coordinate frame centered at the libration point (or lead satellite) with axes aligned to the principal axes of the elliptical orbit. Obtained by rotating the synodic frame through a specific angle, it decouples the in-plane equations of motion into independent directions, simplifying the solution.

Application Value

This concept is fundamental to cislunar orbital mechanics and mission analysis, providing essential theoretical support for trajectory design and operational planning.

References

  • Catlin and McLaughlin, 2007
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Contributors: ouyangjiahong, Ou Yang Jiahong