The Module for Event Driven Operations on Spacecraft (MEDOS)

The Module for Event Driven Operations on Spacecraft (MEDOS) is a framework for real time operational decisions based on detected events from on-board measurements. MEDOS calculates derived parameters, which are physically meaningful and relevant to a mission planner. These derived parameters are then compared, using fuzzy sets, to typical (e.g. published) values of the given parameter and a confidence is produced that the event in question has occurred. Operational responses can then be triggered to detected events. MEDOS has been validated using raw flight data from the MMS mission, and has been verified on flight hardware for a NASA TRL-6 rating. Because MEDOS utilizes processes well understood and developed by the community in question, and due to the nature of events being presented as a likelihood rather than a definitive, it achieves a level of trust that can enable future mission infusion for operational space missions.