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<p>The Europa Clipper mission will perform over 50 low-altitude flybys of Jupiter’s moon Europa. The overall mission plan must be robust to safing events at all points along the trajectory. Depending on the fault type, the spacecraft may demote to using RCS thrusters for attitude control, which can impart several hundred mm/s of unintended <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\Delta \)</EquationSource> </InlineEquation>V over the course of the safe mode response. If one were to occur at the wrong time in tour it could place the spacecraft on a direct impact trajectory with Europa or other flyby body. It could also be costly in terms of clean up <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\Delta \)</EquationSource> </InlineEquation>V. This paper describes the steps taken by the Mission System to mitigate the effects of RCS safing events, with a particular focus on the time between the approach maneuvers and their associated encounters.</p>

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Europa Clipper Mission Design: Tour Trajectory Navigation Analysis - Mitigating the Effects of Unintended \(\Delta \text {V}\) Due to Safe Mode

  • 期刊论文

  • 发表日期：

    2026年3月20日

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  • Andrew S. French,
  • Dylan Boone,
  • Brian Young,
  • Stefano Campagnola

摘要

The Europa Clipper mission will perform over 50 low-altitude flybys of Jupiter’s moon Europa. The overall mission plan must be robust to safing events at all points along the trajectory. Depending on the fault type, the spacecraft may demote to using RCS thrusters for attitude control, which can impart several hundred mm/s of unintended \(\Delta \) V over the course of the safe mode response. If one were to occur at the wrong time in tour it could place the spacecraft on a direct impact trajectory with Europa or other flyby body. It could also be costly in terms of clean up \(\Delta \) V. This paper describes the steps taken by the Mission System to mitigate the effects of RCS safing events, with a particular focus on the time between the approach maneuvers and their associated encounters.