Table 7.
Risk examples for the mission classified following ECSS-M-ST-80 (2008) for their their likelihood (A [low] to E [high]) and their severity (1 [low] to 5 [high]).
| Possible scenario | Risk | Index | Proposed action |
|---|---|---|---|
| Launch fails | A5 | Low | No action - mission failed |
| Failure of one spacecraft | B5 | Medium | Continue mission with remaining spacecraft, focus on scientific research |
| Launch misses time window | C2 | Low | Wait 19 months for the next time window |
| Miss the trajectory for GAM | B5 | Medium | Mission failed |
| Collisions of spacecraft during deployment | B4 | Low | Communicate to spacecraft and try to recover possible orbit problems with propulsion system |
| Not enough data rate during safe mode to ensure communication between spacecraft and ground station | B3 | Low | Spacecraft are on a circular orbit pointing to the Sun. Wait until spacecraft is closer to the ground station, where higher data rate is possible. Two small emergency antennas (70 m dish ground station) |
| Damage of sensitive optics of a coronagraph during space flight | B3 | Low | Analyze the influence of the damage and try to reduce it using image processing at the science ground station |
| Radiation damage of the measurement system caused by GCR background and SEPs | D2 | Medium | Expected damage, which limits the lifetime of the measurement system. Possible to move spacecraft slightly in order to protect them. |
| If the spacecraft enters safe mode in a 40° range on the backside of the Sun, connection will not be possible in this area | B3 | Low | Ask communication specialist. Communicate with spacecraft, when it leaves the 40° area behind the Sun and recover it |
| Blackout of measurements device | A3 | Low | Ask payload specialist. Check the whole spacecraft housekeeping system, special communication time to the spacecraft |
| Explosion of some propulsion tank after deployment | A4 | Low | Check damage, continue mission with remaining spacecraft |
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