The KH-4 (Keyhole-4) was fourth version in the Corona-program to build an optical reconnaissance satellite. December 4, 1962 at 21:30 UTC · Launch Successful Thor Agena D — United States Air Force, to Low Earth Orbit Space Launch Complex 2W, Vandenberg SFB, CA, USA The world's 217th orbital launch attempt, and 75th of 1962. Data: Launch Library 2, The Space Devs. Image by USAF via The Space Devs.