Overview of the SDO Extreme ultraviolet Variability Experiment (EVE)

Details Overview of the SDO Extreme ultraviolet Variability Experiment (EVE) Overview of the SDO Extreme ultraviolet Variability Experiment (EVE)

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh21c..02w&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SH21C-02

Physics

Optics

7538 Solar Irradiance, 7549 Ultraviolet Emissions, 7594 Instruments And Techniques

Scientific paper

The NASA Solar Dynamics Observatory (SDO), with its launch in 2007, is the first mission for the NASA Living With a Star (LWS) program. The SDO mission will provide measurements and modeling of the solar radiation and dynamics that can disturb Earth's environment. The Extreme ultraviolet Variability Experiment (EVE) is one of the three instrument suites on SDO. The EVE measures the solar extreme ultraviolet (EUV) irradiance with unprecedented spectral resolution, temporal cadence, accuracy, and precision. Furthermore, the EVE program will incorporate physics-based modeling to advance the understanding of the solar EUV irradiance variations based on the activity of solar magnetic features. The EVE instrument consists of three subsystems. The Multiple EUV Grating Spectrograph (MEGS) measures the 4-120 nm spectral irradiance with 0.1 nm spectral resolution. The Optics Free Spectrometer (OFS), being ionization cells, provides daily, in-flight calibrations for the MEGS channels. The EUV Spectrophotometer (ESP) completes the spectral coverage at 0.1-5 nm and 119-125 nm and provides additional MEGS calibrations. Collectively, the EVE instrument measures the solar EUV irradiance from 0.1 to 125 nm with 7% accuracy and 4% long-term precision.

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