BackInstrument:  XRIS 

Instrument details
Acronym XRIS
Full name X-Ray Irradiance Sensor
Purpose XRIS will measure the energy power per unit area of solar radiation. Its primary goal is to detect solar X-ray flares and help predict major solar energetic particle events.
Short description
  • Measures spectral bands at X-ray wavelengths around 0.05–0.4 nm and 0.1–0.8 nm. 
Background
  • Evolution from GOES SEM/XRS-EUV
Scanning Technique
  • Sun pointing
Resolution
Coverage / Cycle High-frequency data (typically at 1-second intervals or faster) to catch the rapid rise phase of sudden coronal mass ejections (CMEs) and flare events.
Mass Power Data Rate

 

Providing Agency NASA
Instrument Maturity Flown on operational programme
Utilization Period: 2033 to 2038
Last update: 2026-11-09
Detailed characteristics
Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Instrument classification
  • Earth observation instrument
  • Passive optical radiometer or spectrometer
  • Solar irradiance monitor
WIGOS Subcomponents
  • Subcomponent 2
  • Solar magnetograph, solar EUV/X-ray imagery and EUV/X-ray irradiance, both on the Earth-Sun line and off the Earth-Sun line
  • Solar X-ray spectrometer [from L1, GEO, LEO]
Mission objectives
Primary mission objectives
  • Solar X-ray flux
Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
Note: * Primary mission objective.
VariableRelevance for measuring this variableOperational limitationsExplanation
Downward short-wave irradiance at TOA5 - marginalNo specific limitation.Spectral irradiance limited to UV and VIS