BackForwardInstrument:  SWS/WAI 

Instrument details
Acronym SWS/WAI
Full name Space Weather Suite / Wide-field Auroral Imager
Purpose Observation of Aurora
Short description Description not available. Presumably, UV imaging spectrometer for the range 115-180 nm (inclusive of the H Lyman-alphe line at 121.6 nm) and fluxmeter for the VIS range 427.8-630 nm
Background Part of the SWS (Space Weather Suite) package
Scanning Technique Earth's limb observation from a sunsynchronous orbit
Resolution 300 km (for the limb view)
Coverage / Cycle Full ionosphere, with sampling at 22 s (UV) and 180 s (VIS) intervals
Mass Power Data Rate


Providing Agency CMA
Instrument Maturity Flown on operational programme
Utilization Period: ≥2018-06 to ≥2026
Last update: 2017-05-21
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
  • Space radiometer or spectrometer
Mission objectives
Primary mission objectives
  • Aurora
Secondary mission objectives
  • UV flux spectrum
  • UV sky image
Opportunity objectives
  • Electron Density
  • Ionospheric plasma density
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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
UV flux spectrum1 - primaryNo specific limitation.Earth's limb observed, high spectral resolution
UV sky image2 - very highNo specific limitation.Earth's limb observed, spectrometry with coarse spatial resolution
Aurora1 - primaryNo specific limitation.Observed down to Earth's surface in UV and VIS
Ionospheric plasma density5 - marginalNo specific limitation.UV imaging spectrometer measuring ionospheric plasma density in the Earth's limb
Electron Density5 - marginalNo specific limitation.UV spectrometry of the Earth's limb