EXPERIENCE FEEDBACK ON CCD DETECTORS IN ORBIT: FOCUS ON IN-FLIGHT DEGRADATION OF SEVERAL CASES OF PERFORMANCE

摘要

The performance stability of CCD detectors and video electronics during life time is an important issue for most of space missions. Several items are concerned, such as CCD dark signal increase, induced by space radiation environment (dose effects, proton hits, etc...). Ground tests are performed to predict on-board behaviour and end-of-life performance. But generally this approach cannot achieve a rigorous representation of mission conditions. Experience feedback from in-flight measurements is therefore very useful in order to infer what really occurs and to allow comparison between actual findings and ground tests.