BackForwardInstrument:  CDS 

Instrument details
Acronym CDS
Full name Coronal Diagnostic Spectrometer
Purpose For density, temperature and flows in the coronal solar atmosphere
Short description Imaging spectrometer for the EUV bands 24-80 nm (normal incidence) and 15-80 nm (grazing incidence), including Fe-IX at 17.1 nm, Fe-XII at 19.5 nm, Fe-XV at 28.4 nm, and He-II at 30.4 nm
Background Part of a package of instruments to observe the solar atmosphere
Scanning Technique Sun pointing from the L1 Lagrange libration point. Corona view included
Resolution 1500 km at the Sun surface
Coverage / Cycle Full Sun disk in about 10 s
Mass Power Data Rate

 

Providing Agency UKSA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1996 to 2025
Last update: 2021-11-09
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
  • Solar and space environment monitors
  • Solar activity monitor
WIGOS Subcomponents
  • Subcomponent 1
  • Solar coronagraph and radio- spectrograph, at L1
  • Solar coronographic imager at L1
  • 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 EUV spectrometer [from L1, GEO, LEO]
  • Solar EUV imager [from L1, GEO, LEO]
  • Solar coronagraph and heliospheric imagery both on the Earth-Sun line and off the Earth-Sun line (e.g. L5 point)
  • Solar coronographic imager [from L1, GEO, LEO]
Mission objectives
Primary mission objectives
  • Solar EUV flux spectrum
  • Solar EUV image
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 EUV flux spectrum*4 - fairNo specific limitation.Coarse spectral resolution, moderate dynamic range, solar disc and corona view included
Solar EUV image*1 - primaryNo specific limitation.Spectrometry with high spatial resolution, corona view included
Solar coronagraphic image3 - highNo specific limitation.EUV (10-121.6 nm), observed with occultation