BackForwardInstrument:  SUFR-Sp-C 

Instrument details
Acronym SUFR-Sp-C
Full name Solar UV Radiometer
Purpose To measure solar radiation intensity in the UV range
Short description UV radiometer to measure the total energy in the interval 0-130 nm and the fractions in 24 ranges in the bands of soft X-rays 0.3-12 nm and on the hydrogen Lyman-alpha line (121.6 nm)
Background Consolidated technology
Scanning Technique Sun pointing from a LEO high-inclination drifting orbit
Resolution N/A (full disk)
Coverage / Cycle Full Sun disk integral at about 8-min rate
Mass 3.6 kg Power 12 W Data Rate


Providing Agency Roscosmos
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1994 to 2005
Last update: 2017-05-17
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
  • Solar and space environment monitors
  • Solar activity 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 UV imager [from L1, GEO, LEO]
Mission objectives
Primary mission objectives
  • Solar EUV flux
  • Solar Lyman-alpha flux
  • Solar UV flux
  • 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
Solar X-ray flux*3 - highNo specific limitation.Few channels, wide dynamic range
Solar EUV flux*1 - primaryNo specific limitation.Several channels, wide dynamic range
Solar Lyman-alpha flux*2 - very highNo specific limitation.H-Ly-alpha at 121.6 nm (EUV/UV boundary)
Solar UV flux*2 - very highNo specific limitation.Several channels, moderate dynamic range