DEMETER [CNES]
Official name DEMETER
Alternative name Demeter
Cospar ID 2004-025C
Norad ID 28368
Launch date 2004-06-29
Launch site TTMTR
Launch vehicle Dnepr
Country/Organization France
Type application Science, Ionospheic, earth science
Operator CNES
RCS size MEDIUM
Decay date ON ORBIT
Period (min) 97.17
Inclination (deg) 98.08
Perigee (km) 622
Apogee (km) 624
Eccentricity 0.00160513643659711
Mean motion (revs. per day) 14.8193887002161
Semi-Major axis (km) 7001.135
Raan (deg) 115.3931
Arg of perigee (deg) 60.9769
Shape Box
Mass (kg) 132
Height (m) 0.9
Width (m) 0.6
Depth (m) 0.9
Span (m^2) 0.9
Contractors CNES
Equipment IMSC, ICE, IAP, ISL, IDP
Configuration Myriade
Power Deployable solar array, batteries

DEMETER (Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) is the first project in the CNES Myriade microsatellite series. The scientific purpose of the mission is to:

  • study the ionospheric disturbances related to seismic activity,
  • study the ionospheric disturbances related to human activity,
  • study the pre- and post-seismic effects in the ionosphere,
  • contribute to understand the mechanisms generating those disturbances,
  • give global information on the Earth's electromagnetic environment at the satellite altitude.

The scientific component includes the following sensors:

  • IMSC: a triaxial set of 3 magnetic sensors (Search Coil),
  • ICE: a 4 electrical sensor system,
  • IAP: a plasma analyser,
  • ISL: a Langmuir probe
  • IDP: a particle detector.
Satellite COSPAR Date LS Launch Vehicle Remarks
DEMETER 2004-025C 2004-06-29 TTMTR Dnepr with SaudiSat 2, SaudiComsat 1, SaudiComsat 2, LatinSat C, LatinSat D, AMSAT-Echo, Unisat 3