Extreme Ultraviolet (EUV) Monitor

The Extreme Ultraviolet (EUV) monitor is part of the Langmuir Probe and Waves (LPW) instrument and measures solar EUV input and variability, and wave heating of the Martian upper atmosphere.

Goals:

• Measure solar emissions from different regions of the Sun in three distinct EUV bands
• Three channels provide a complete EUV spectrum (0.1-190 nm) to serve as a proxy for input to the Flare Irradiance Spectral Model (FISM) model

Observations:

• Solar EUV irradiance variability at wavelengths important for ionization, dissociation, and heating of the upper atmosphere (wavelengths shortward of HI Ly-α 121.6 nm)

Technical details and heritage:

• Three photometers at key wavelengths representing different temperature solar emissions (0.1-7, 17-22, and 121.6 nm)
• Full spectrum (0-200 nm) derived from measurements using Flare Irradiance Spectral Model (FISM)
• Heritage from TIMED, SORCE, SDO, and sounding rocket instruments

Instrument publications: (sorted by most recent at top)

• The MAVEN EUVM Model of Solar Spectral Irradiance Variability at Mars: Algorithms and Results
  (Journal of Geophysical Research—Space Physics article—published online March 2017)—Download PDF (7 MB)
• Hot Oxygen Escape from Mars: Simple Scaling with Solar EUV Irradiance
  (Journal of Geophysical Research—Space Physics article—published online December 2016)—Download PDF (580 KB)
• The Solar Extreme Ultraviolet Monitor for MAVEN
  (Space Science Reviews article—published online September 2015)—Download PDF (1 MB)

Frank Eparvier (LASP) is the instrument lead for the EUV sensor. For more about Eparvier, visit: http://cafescicolorado.org/Eparvier.htm

 

 

 

 

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MAVEN Science Community Workshop Presentations
(Dec. 2, 2012)