US reconnaissance satellite, lashed together to meet an emergency requirement for close-up imaging of a suspected Soviet ICBM site near Tallinn. Carried one 'E-5' panoramic camera taken from the cancelled Samos program, with a focal length of 1.67 m, and a ground resolution of 1.8 m. Ground swath was 14 km x 74 km.

Typical orbit: 150 km x 481 km at 75 degrees inclination. Mass: 1,500 kg (3,300 lb).

• 1963 March 18 - KH-6 8001 - Launch Site: Vandenberg. Launch Complex: SLC1W. Launch Vehicle: Delta. FAILURE: Failure. Mass: 1,500 kg (3,300 lb).
  First launch of KH-6. Mission failed.

• 1963 May 18 - KH-6 8002 - Launch Site: Vandenberg. Launch Complex: SLC1E. Launch Vehicle: Delta. Mass: 1,500 kg (3,300 lb). Perigee: 147 km (91 mi). Apogee: 506 km (314 mi). Inclination: 74.50 deg. Period: 91.00 min.
  KH-6. Second launch of KH-6. Operation was successful but no film was used. Officially: Spacecraft Engaged in investigation of spaceflight techniques and technology (US Cat A).

• 1963 July 31 - KH 4A-07 - Launch Site: Vandenberg. Launch Complex: SLC2W. Launch Vehicle: Delta. Mass: 1,500 kg (3,300 lb). Perigee: 152 km (94 mi). Apogee: 455 km (282 mi). Inclination: 74.90 deg. Period: 90.60 min.
  KH-6. Third and final KH-6 mission (LANYARD). Mission was successful but image quality was poor. Officially: Spacecraft Engaged in investigation of spaceflight techniques and technology (US Cat A).