The D-2A satellite was the first of the true Diamant B class payloads. Its mission was to study the geocorona, the diffuse cloud of hydrogen and helium surrounding the Earth. It was launched on 1971 Apr 15 into a 46 degree inclination orbit; the satellite was named Tournesol (Sunflower) after its bright yellow paint scheme. CNES operated the satellite from its COBY (Centre d'Operations de Bretigny) control center south of Paris.
|1971 Apr 15||0919:37||Launch by Diamant B||CSG|
|96.2 457 x 697 x 46.4|
|1980 Jan 28||Reentered|