D-2A Polaire

1971 FTO

The backup D-2A satellite was prepared for a mission to obtain complementary measurements from a 75 degree polar orbit. The satellite, referred to as D-2A Polaire, carried the same experiments as Tournesol plus one new one to measure the distribution of hydrogen and helium in the geocorona. Minutes after launch on 1971 Dec 5 from Kourou, the second stage of the Diamant B failed and the payload was lost. [3] As far as I can determine, 'Polaire' is strictly speaking an adjective applied to the D-2A name and not the name of the satellite in its own right.

D-2A Polaire 


1971 Dec 5    Launch by Diamant B   CSG ELD 
   Stage 2 failed