Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa51e..01e&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA51E-01
Astronomy and Astrophysics
Astrophysics
[0358] Atmospheric Composition And Structure / Thermosphere: Energy Deposition, [7538] Solar Physics, Astrophysics, And Astronomy / Solar Irradiance, [7974] Space Weather / Solar Effects
Scientific paper
The Extreme ultraviolet (EUV) Variability Experiment (EVE) on NASA's Solar Dynamics Observatory (SDO) satellite measures the solar spectral irradiance in the EUV at high temporal and spectral resolution. The Multiple EUV Grating Spectrographs (MEGS) on EVE make 0.1 nm spectral measurements with a 10-second cadence while the EUV Spectro-Photometer (ESP) makes broadband (~ 4 nm) measurements of select bands at 0.25-second cadence. Normal operations for EVE began May 1, 2010 at low solar conditions. Since then EVE has observed the EUV spectral irradiance changes during several hundred flares ranging from A to X class, in addition to the spectral variations from active region evolution and the rise from solar minimum conditions. These EUV spectral irradiance changes will be described, as will potential impacts to understanding the impacts on the thermosphere and ionosphere.
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