SDO Extreme Ultraviolet Variability Experiment (EVE): Instrument and First Light

Details SDO Extreme Ultraviolet Variability Experiment (EVE): Instrument and First Light SDO Extreme Ultraviolet Variability Experiment (EVE): Instrument and First Light

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21630802w&link_type=abstract

American Astronomical Society, AAS Meeting #216, #308.02; Bulletin of the American Astronomical Society, Vol. 41, p.871

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Scientific paper

The Extreme ultraviolet Variability Experiment (EVE) aboard the NASA Solar Dynamics Observatory (SDO) was launched on 11 February 2010. The EVE instruments measure the solar extreme ultraviolet (EUV) irradiance from 0.1 to 105 nm with unprecedented spectral resolution (0.1 nm), temporal cadence (10 sec minimum), and accuracy (20% or better). The highly variable solar EUV irradiance is a key measurement for the NASA Living With the Star (LWS) program as it is the major energy input into the Earth's upper atmosphere and thus impacts the geospace environment that affects satellite operations and communication and navigation systems. The EVE measurements, along with additional solar measurements from SDO and other satellite and ground-based instruments, will be used to advance our understanding of the solar EUV irradiance variability. For short time scales, EVE will make detailed observations on the evolution of flare events that are an important interest for space weather research and operations. For longer time scales, EVE measurements will be compared to other solar EUV irradiance measurements to help establish a composite time series of the solar EUV irradiance. The EVE instrument will be described, and first light results from EVE during the rise of solar cycle 24 will be presented. The EVE instrument team is supported by the NASA SDO Project.

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