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Degradation assessment of LYRA after 5 years on orbit - Technology Demonstration
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Degradation assessment of LYRA after 5 years on orbit - Technology Demonstration
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Journal Article
Degradation assessment of LYRA after 5 years on orbit - Technology Demonstration
2015
Overview
We present a long-term assessment of the radiometric calibration and degradation of the Large Yield Radiometer (LYRA), which has been on orbit since 2009. LYRA is an ultraviolet (UV) solar radiometer and is the first space experiment using aboard a pioneering diamond detector technology. We show that LYRA has degraded after the commissioning phase but is still exploitable scientifically after almost 5 years on orbit thanks to its redundancy design and calibration strategy correcting for instrument degradation. We focus on the inflight detector’s calibration and show that diamond photodetectors have not degraded while silicon reference photodiodes that are even less exposed to the Sun show an increase of their dark current and a decrease of their photoresponse.
