| definition |
- [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.
Group: Instrument_Details
Entry_ID: EVE-SDO
Group: Instrument_Identification
Instrument_Category: Solar/Space Observing Instruments
Instrument_Class: Ultraviolet Instruments
Short_Name: EVE-SDO
Long_Name: Extreme ultraviolet Variability Experiment on Solar Dynamics Observatory
End_Group
Group: Associated_Platforms
Short_Name: SDO
End_Group
Group: Spectral_Frequency_Information
Wavelength_Keyword: Ultraviolet
Spectral_Frequency_Coverage_Range: 0.1 nm -105 nm
End_Group
Online_Resource: http://lasp.colorado.edu/eve/
Online_Resource: http://sdo.gsfc.nasa.gov/mission/instruments.php
Sample_Image: http://lasp.colorado.edu/eve/images/instrument/EVE_FrontOpen_Labels_sm.jpg
Creation_Date: 2009-04-24
Group: Instrument_Logistics
Instrument_Owner: USA/NASA
End_Group
End_Group
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