THE EUV VARIABILITY EXPERIMENT (EVE) ON THE SOLAR DYNAMICS HE OBSERVATORY (SDO): SCIENCE PLAN AND INSTRUMENT OVERVIEW

摘要

The highly variable solar extreme ultraviolet (EUV) radiation is the major energy input into the Earth’s upper atmosphere and thus impacts the geospace environment that affects satellite operations, commun communications, and navigation. The Extreme ications, ultraviolet Variability Experiment (EVE) aboard the NASA Solar Dynamics Observatory (SDO) will measure the solar EUV irradiance from 0.1 to 105 nm with unprecedented spectral resolution (0.1 nm), temporal cadence (10 s sec), and accuracy (20%). The ec), EVE program will provide solar EUV irradiance data for the NASA Living With the Star (LWS) program, including near real real-time data products to be used in operational atmospheric models that specify the space environment and to a assist in forecasting for space ssist weather operations. The EVE program is expected to make significant progress towards real understanding of the physics of the solar EUV irradiance variations on time scales from flares to the solar cycle. Additional informati information about the EVE program can be found at on http://lasp.colorado.edu/eve/ eve/.