Space object re-entry risk assessment

All space objects on sufficiently low Earth orbits eventually re-enter either naturally as a consequence of the influence of atmospheric drag (uncontrolled re-entry), or after a propulsive maneuver (controlled re-entry). In any case, it is necessary to know the danger associated with the re-entry characterized either by the probability of being hit by the fraction of the objects reaching the ground (direct human casualty) or characterized by the areas polluted by the rest of the space objects. A typical example being when a space object with a nuclear reactor re-enters.

Identification of 'zone of concern' and re-entry time frame

Corona Space will provide object re-entry warnings (3 months in advance), re-entry risk object notifications, and short-term risk object re-entry warnings (1 week in advance). Warning time can be changed as agreed with the client. These warnings will include estimations of the zone concerned by the consequences of the atmospheric re-entry and the time frame during which the feared consequence of the re-entry is expected. This is important when the probability of being hit by a fraction of the object is high and/or when the re-entering object contains contaminating materials (e.g. nuclear material).