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| A Discoverer 1 launch cover from "H.Flick", postmarked at Vandenberg Air Force Base with a hand cancel on February 28, 1959. |
Discoverer 1 was launched aboard a Thor-Agena A rocket and served as a test vehicle for the highly classified CORONA reconnaissance satellite program. Although publicly described as a scientific and technological satellite, the Discoverer program provided cover for the development of America’s first photographic reconnaissance satellites. Discoverer 1 carried neither a camera nor a film-return capsule, but successfully demonstrated the Thor-Agena launch system and the capability to place a spacecraft into a near-polar orbit from Vandenberg. The mission marked an important early step toward the successful CORONA reconnaissance missions that followed.
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| A Discoverer 1 launch cover from "Goldcraft", postmarked at Lompoc, California, with a machine cancel on February 28, 1959. |
The mission did establish an orbit, although it was not the precise orbit originally intended. Contemporary and later assessments indicate that the spacecraft eventually ceased transmitting and was believed to have reentered near the South Pole. No recovery was attempted because Discoverer 1 did not carry a recovery capsule.
(Reference from
Discoverer 1)
