Precession-Nutation Matrix

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

Rotation matrix M(t) describing the directional changes of Earth's spin axis due to precession and nutation, used for transforming between the geocentric celestial and Earth-fixed coordinate systems. It is a key step in the coordinate transformation for computing Earth's J₂ perturbation. In force model simplification, this matrix can be neglected since Earth's J₂ perturbation is small, saving computation time.

Application Value

This concept plays an important role in trajectory optimization and mission planning applications.

References

  • 邓辉 等 - 2017 - 地月系共线平动点探测器的星上轨道预报问题
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Contributors: ouyangjiahong, Ou Yang Jiahong