BackForwardInstrument:  SODISM 

Instrument details
Acronym SODISM
Full name Solar Diameter Imager and Surface Mapper
Purpose Sun observation, Space weather - Monitoring from a terrestrial orbit
Short description Imaging the solar disk and high-resolution parts of its limb. Three filter wheels to select four channels in the VIS range 535.7 to 782.2 nm, and two in UV at 215 and 393.37 nm (Ca II-K line). Extremely accurate pointing (0.003 arcsec, with knowledge of 0.001 arcsec, corresponding to 42 and 14 km, respectively) to measure Sun diameter variations
Background New development
Scanning Technique Sun pointing from a dawn-dusk LEO
Resolution 750 km at Sun surface
Coverage / Cycle Full solar disk each about 10 s
Mass 22.5 kg Power 19 W Data Rate 26 kbps

 

Providing Agency CNES
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2010 to 2014
Last update: 2021-10-02
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 spectrometer [from L1, GEO, LEO]
  • Solar UV imager [from L1, GEO, LEO]
  • Solar VIS spectrometer [from L1, GEO, LEO]
  • Solar VIS imager [from L1, GEO, LEO]
  • Subcomponent 3
  • UV spectral imagery (e.g. GEO, HEO, MEO, LEO)
  • UV spectral imager [from GEO, HEO, MEO, LEO]
Mission objectives
Primary mission objectives
  • Solar Ca II-K image
  • Solar UV image
  • Solar VIS image
Evaluation of Measurements