Cannon Ball Model

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

A simplified spacecraft solar radiation pressure model that treats the spacecraft as a sphere with constant cross-sectional area and uniform reflectivity. In libration point orbit stationkeeping, this model estimates SRP accelerations; its key parameter (coefficient of reflectivity, Cr) can be updated from navigation data to improve model accuracy. ARTEMIS P2 saw significantly reduced stationkeeping costs after updating Cr.

Application Value

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

  • Retrograde Motion
  • Absolute Phase Bias
  • Relative Attitude Quaternion
  • Radial-Tangential-Normal Coordinate System, RTN

References

  • Folta et al. - 2014 - Acta Astronautica
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Contributors: ouyangjiahong, Ou Yang Jiahong