BackForwardInstrument:  VUSS 

Instrument details
Acronym VUSS
Full name Vacuum UV Solar spectrum
Purpose Long-term measurements of the solar EUV radiation
Short description Spectrometer for the EUV range 20-58 nm with resolving power λ/Δλ = 400, including Fe-XV at 28.4 nm, and He-II at 30.4 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 1-s rate
Mass 18.5 kg Power 20 W Data Rate


Providing Agency Roscosmos
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1994 to 1994-07-15
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 No WIGOS subcomponents have been defined.
Mission objectives
Primary mission objectives
  • Solar EUV flux spectrum
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Tentative 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
VariableRelevance for measuring this variableOperational limitationsExplanation
Solar EUV flux spectrum2 - very highNo specific limitation.High spectral resolution, moderate dynamic range