The first series of Corona satellites were the Keyhole 1 (KH-1) satellites based on the Agena-A upper stage, which offered housing and an engine that provided attitude control in orbit. The KH-1 payload included the C (for CORONA) single panoramic camera built by Fairchild Camera and Instrument with a f/5.0 aperture and focal length. It had a ground resolution of . Film was returned from orbit by a single General Electric Satellite Return Vehicle (SRV) constructed by General Electric. The SRV was equipped with a small onboard solid-fuel retro motor to deorbit the payload at the end of the mission. Recovery of the capsule was done in mid-air by a specially equipped aircraft.