The Solar Orbiter mission [1],[2],[3], part of the Cosmic Vision Science Program of European Space Agency (ESA), to be launched in 2017, is devoted to the Sun observation. From its unique vantage point in an elliptical orbit around the Sun, and approaching as close as 60 solar radii, Solar Orbiter will provide unprecedented closeup and high-latitude observations of the Sun. The Extreme Ultraviolet Imager (EUI) instrument [4],[5],[6],[7],[8],[9] was selected as one of the 10 scientific payload instruments of the Solar Orbiter mission.
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