What does the Continuity requirement imply and how is Continuity calculated?
‘Continuity’ means the probability that a system will perform its required function without unscheduled interruption (e.g. system failure). In practice, the Continuity of the ADS-B out system should be assessed with common industry methods. In particular:
- The assessment should encompass all equipment contributing to the ADS-B function and not just the transponder.
- The reliability of each component contributing to the function (e.g. transponder, control panels, position and velocity source) has to be considered,
- The probability of failure of the power source failure has to be considered,
- Common modes have to be considered.