Collision Probability Assessment for the RapidEye Satellite Constellation

Within the last three years, the Joint Space Operations Center (JSpOC) detected 85 close approaches between the RapidEye constellation and secondary space objects. Most of the approaching objects were non-operational, such as debris from the Chinese Fengyun 1C satellite. In order to actively mitigate this risk for the five satellites, RapidEye entered into collaboration with the ESA's Space Debris Office (SDO). A collision avoidance assessment service is provided where SDO supplies information on the criticality of close approach events. The information is supplemented with a recommendation as to whether RapidEye should perform a collision avoidance manoeuvre by adjusting the orbit of one or more of its satellites.