BackForwardInstrument:  WINDII 

Instrument details
Acronym WINDII
Full name Wind Doppler Imaging Interferometer
Purpose Wind in the upper atmosphere
Short description Michelson interferometer measuring the Doppler shift and line broadening of atmospheric emission in VIS and NIR. Observed lines: oxygen at 557.7, 630, 732 and 763.2 nm. OH at 734.1 nm. Spectral resolution 0.002 nm
Background New development. Collaboration CSA-CNES
Scanning Technique Limb sounding. Simultaneous view of the 80-300 km altitudes by a CCD detector array. View at two azimuth angles: 45º and 135º from the satellite velocity vector
Resolution Vertical: 20 km; horizontal 300 km along-view
Coverage / Cycle Latitudes < 60°, each 3 days for cells of 300 km side
Mass 145 kg Power Data Rate 2 kbps


Providing Agency CSA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1991 to 2005
Last update: 2017-03-29
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
  • Limb sounders
  • Limb sounder
WIGOS Subcomponents
  • Subcomponent 2
  • UV/VIS/NIR/IR/MW limb sounders
  • UV/VIS/NIR/IR/MW scanning limb sounder
Mission objectives
Primary mission objectives
  • Wind (horizontal)
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
Atmospheric temperature4 - fairLimited to high atmosphere.NIR limb sounding by emission in the O2 A-band around 760 nm. Used for the thermosphere
Wind (horizontal)*4 - fairLimited to high atmosphere.VIS and NIR very-high resolution limb spectrometry. Doppler analysis of oxygen emission lines