ON THE REENTRY DESIGN FOR THE SOHO MISSION

Reentry trajectories to the Earth have been recently con- sidered as a valuable end-of-life option also for Libration Point Orbits (LPO) missions. In this work, we investi- gate in detail the case corresponding to SOHO. On the one hand, we show how the main uncertainties associated with the problem affect the probability of reentry and the corresponding point at the interface with the atmosphere. Monte Carlo propagations are applied to different cases of uncertainties. They correspond to the orbit determi- nation, the efficiency of the maneuver required to target the Earth, and the characteristics of the spacecraft deter- mining the solar radiation pressure effect. On the other hand, we provide a comparison between a classical reen- try from a LEO and a hypervelocity reentry from a LPO, in terms of ground casualty area and demise percentage.