Instrument: EVE-SDO : Extreme ultraviolet Variabilty Experiment on Solar Dynamics Observatory
	Instrument Category: Solar/Space Observing Instruments Instrument Class: Ultraviolet Instruments

Associated Platforms SDO Spectral/Frequency Information Wavelength Keyword: Ultraviolet Spectral/Frequency Coverage/Range: 0.1 nm -105 nm Related Data Sets View all records related to this instrument Description [Source: Extreme ultraviolet Variabilty Experiment (EVE) team home page, http://lasp.colorado.edu/eve/ ] The Extreme ultraviolet Variabilty Experiment (EVE) is designed to measure the solar extreme ultraviolet (EUV) irradiance. The EUV radiation includes the 0.1-105 nm range, which provides the majority of the energy for heating Earth's thermosphere and creating Earth's ionosphere (ionized plasma). This wide spectral range requies the use of multiple channels. Some key requirements for EVE are to measure the solar EUV irradiance spectrum with 0.1 nm spectral resolution and with 20 sec cadence. These drive the EVE design to include grating spectrographs with array detectors so that all EUV wavelengths can be measured simultaneously. Another key requirement for EVE is to measure the EUV radiation with an accuracy of 25% or better, thus on-board calibration channels are included to go with underflight calibration experiments to be conducted during the SDO mission. Online Resources http://lasp.colorado.edu/eve/ http://sdo.gsfc.nasa.gov/mission/instruments.php http://lws.gsfc.nasa.gov/missions/sdo/sdo.htm Instrument Logistics Instrument Owner: USA/NASA