Descrizione : The KH-2 (Keyhole-2) was second version in the Corona-program to build an optical reconnaissance satellite. These satellites were all launched under the name Discoverer.

The KH-2 payload consisted of the improved C` (Corona prime) single panoramic camera and a single General Electric return vehicle (SRV, Satellite Return Vehicle). The improved and simplified C`-camera was built by the Fairchild Camera Co. and with a f/5.0 aperture and 61 cm focal length had a ground resolution of 10.7 m.

The satellite was based on the larger Agena-B upper stage, which provided attitude control in orbit. The film return capsule carried its own small solid-fuel retro motor to deorbit at the end of the mission with mid-air recovery of the returning capsule by a specially equipped aircraft.

Ten KH-2 satellites were launched, of which four resulted in a successful return of film. Four missions failed to orbit.

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DISCOVERER 16 (KH-2 1) (SATELLITE) · THOR AGENA · FAILURE