KH-4 26 (Corona 75) & Pundit 2

The KH-4, or Keyhole-4, represented the fourth iteration within the Corona program. This version introduced stereoscopic imaging capabilities with the Corona-M or Mural camera, consisting of two C''' (Corona triple-prime) cameras mounted with a 30-degree separation angle for forward and rear-looking perspectives. Additionally, a 4 cm index camera was included for specific imaging tasks. The Mural camera offered a ground resolution of 7.5 meters. Operating atop the Agena-D upper stage, the satellite facilitated attitude control during its mission, with film return managed by a single General Electric return vehicle (SRV). Upon mission completion, the film return capsule utilized its own solid-fuel retro motor for deorbiting, enabling mid-air recovery by specially equipped aircraft.

The Pundit satellites were part of a series of so called Program 11 or P-11 "Subsatellite Ferrets", low orbit ELINT/SIGINT satellites to pinpoint and characterize different Radar emitters in the Soviet Union and Warsaw pact states.