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This spacecraft carried an EUV experiment for solar and atmospheric investigations and a set of UV experiments for making stellar, zodiacal light, and integrated sky background and stellar observations. The spacecraft was spinning at about 0.25 rpm about an axis that was directed toward the sun. The data transmission rate was 256 b/s for real-time data and 11 kb/s for stored data at a telemetry frequency of 136.740 MHz. The memory capacity was 1.6 Mb. The cylindrically shaped satellite had a diameter of 0.8 m and a height of 0.7 m and weighed 106.6 kg. Four solar panels situated perpendicular to the cylindrical axis provided power for the mission. The stabilization system failed on December 28, 1976, thereby terminating operation of the spacecraft.

Alternate Names

  • 8332
  • Astronomy Satellite D2B

Facts in Brief

Launch Date: 1975-09-27
Launch Vehicle: Diamant
Launch Site: Kourou, French Guiana
Mass: 115 kg

Funding Agency

  • Centre National de la Recherche Scientifique (France)


  • Solar Physics

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Dr. D. SacotteProject ManagerCentre National d'Etudes Spatiales
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