Abstract
This paper reports the phase B mission analysis work performed for the safe orbit and the collision avoidance manoeuvres (CAM) of the PROBA-3 formation flying mission, including the recovery to nominal conditions. PROBA-3 will perform formation flying in a highly elliptical orbit, and perform solar coronagraphy and formation manoeuvring demonstrations in a six-hour arc around apogee. Mission analysis in this paper addresses the safe orbit and the CAM and focuses on safety and ΔV requirements. Important constraints on the mission analysis are the absence of an omnidirectional sensor, and the requirement that the spacecraft cannot turn more than 30° away from the Sun due to thermal and power constraints. In addition, no on-board action can be taken after safe orbit entry or after a CAM, which means that the recovery needs to be performed under ground control.
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