Scientists say they've finally solved a longstanding mystery as to why solar probes unexpectedly degrade over short periods of time.
that extend away from the Sun like hot whips. These events can affect us here on Earth, resulting in geomagnetic storms that cause disruptions in power grids and navigation systems.By monitoring the Sun with solar probes and satellites, scientists can get a better handle on its flareup schedule. Unfortunately, however, spacecraft that face the Sun tend to lose their ability to capture EUV light within a few years of entering into service.
. The researchers based this on their study of SDO, but say that other spacecraft suffered the same fate.Other examples of spacecraft degradation include the LYRA instrument on board the European PROBA2 satellite, the SOLSPEC instrument on board the SOLAR payload for the International Space Station, which was used to measure solar energy, and the Solar Diameter Imager and Surface Mapper telescope on board the PICARD spacecraft, according to Berg.
For years, scientists believed that the filters were developing a layer of carbon, a result of contamination on the spacecraft. But the same group of scientists behind the new researchbefore immediately going back to the drawing board. “The other thing that pointed toward oxidation is that the spacecraft instruments have been built to be cleaner and cleaner over the past few decades, with the goal of eliminating sources of organic molecules that lead to carbon deposition,” Tarrio said.
So how did the oxide layer form in the first place? The scientists believe that water from the spacecraft’s thermal blanket, which is used to control the spacecraft’s temperature, interacts with the filter’s aluminum to produce the oxidized layer that then blocks the light from traveling through the detector.The new research could better inform the design of future Sun-gazing spacecraft to help prevent their rapid degradation.
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