These web pages provide information about the Extreme ultraviolet Variability Experiment (EVE), which is part of the NASA Solar Dynamics Observatory (SDO) mission.
 The NASA SDO, with its launch planned for October 2009, is the first mission for the NASA Living With a Star (LWS) program. The SDO mission will provide measurements and models of the solar radiation and dynamics that can disturb Earth's space weather environment. EVE is one of three instrument suites on SDO. EVE measures the solar extreme ultraviolet (EUV) irradiance with unprecedented spectral resolution, temporal cadence, accuracy, and precision. Furthermore, the EVE program will incorporate physics-based models of the solar EUV irradiance to advance the understanding of the solar EUV irradiance variations based on the activity of the solar magnetic features.
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