Other
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsh51b..02w&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SH51B-02
Other
2479 Solar Radiation And Cosmic Ray Effects, 7519 Flares, 7537 Solar And Stellar Variability, 7538 Solar Irradiance, 7549 Ultraviolet Emissions
Scientific paper
The Solar Dynamics Observatory (SDO) is the first mission of NASA's Living With a Star (LWS) program. The satellite will be launched in 2008 into a geosynchronous orbit, allowing for almost continuous solar observations, and has a planned mission of at least five years. One of the instruments on SDO is the Extreme ultraviolet Variability Experiment (EVE). EVE will measure the solar extreme ultraviolet (EUV) spectral irradiance from 0.1 to 105 nm, plus hydrogen Lyman-α (121.6 nm) at a 10-second time cadence. The output of the Sun at these wavelengths is highly variable on timescales of minutes (solar flares), to months (solar rotations), to years (solar cycle), and even longer. The EVE spectral irradiance data, along with the other SDO solar images, will be used to study this variability and its sources, to improve models of solar irradiance, and to understand the impact of irradiance variability on the geospace environment. A major thrust of the EVE program is the improvement of solar data products for space weather operations. Near real-time products will be produced within fifteen minutes and will be used in NOAA operational atmospheric models that specify the space environment and to assist in forecasting for space weather operations. Many of the EVE data processing algorithms are inherited from the data processing of the solar UV irradiance by the TIMED Solar EUV Experiment (SEE), which has been operating since January 2002. The EVE data system has the additional challenges associated with a continuous data stream, high data rate of 7 Mbps, and producing near real-time data products. The solutions for these challenges are discussed for the EVE data system.
Eparvier Francis G.
Woodraska Donald L.
Woods Thomas N.
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