Other
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsa23a..13e&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SA23A-13
Other
0358 Thermosphere: Energy Deposition, 2479 Solar Radiation And Cosmic Ray Effects, 7538 Solar Irradiance, 7549 Ultraviolet Emissions, 7594 Instruments And Techniques
Scientific paper
The solar extreme ultraviolet (EUV: 0-125 nm) irradiance is a primary energy input for the thermosphere and ionosphere. The variability of the solar EUV irradiance ranges from several percent at some wavelengths to orders of magnitude at others, on timescales from minutes to years. This solar spectral irradiance variability can cause profound variability in the terrestrial upper atmosphere, which is why knowledge of the solar EUV irradiance is of great importance to the Living With a Star (LWS) Geospace Program. The EUV Variability Experiment (EVE) on the upcoming Solar Dynamics Observatory (SDO) mission will provide measurements of the solar EUV irradiance starting in 2008 and extending through its nominal five year mission. EVE will measure from 0.1 to 105 nm, plus the hydrogen Lyman-alpha at 121.6 nm at a time cadence of 10 seconds, with a resolution of 0.1 nm for 5-105 nm and 1 nm elsewhere, and with an accuracy of better than 25% throughout the mission. SDO will be in a geosynchronous orbit, allowing for nearly continuous measurements of the Sun. This presentation will provide an overview of solar EUV variability and will detail the EVE measurements and data products that will be made publicly available to the geospace community.
Eparvier Francis G.
Jones Andrew R.
Judge Darrell
Woodraska Donald L.
Woods Thomas N.
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