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Here are details about a : Space commemorative cover or Space Cover.
Cosmodrom : USA
Date of Cancellation: Jun 26, 1959 Kind of Event : Launch Launch pad : USA Vandenberg (CA)
habité?/manned?: robot Mission type : Failure
FAILURE
ou?/where?: au sol - ground
autographe?: non - none
Description : Discoverer 4 was a first generation, low resolution Air Force surveillance satellite launched from Vandenberg AFB aboard a Thor Agena-A rocket. The mission failed because the satellite failed to achieve orbit.
The primary goal of
the program was to develop a film-return photographic surveillance satellite
to assess how rapidly the Soviet Union was producing long-range bombers and ballistic missiles and where they were being deployed, and to take photos over the Sino-Soviet bloc to replace the the U2 spyplanes.
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