Discoverer 37 was a KH-3 (Keyhole-3) optical reconnaissance satellite. January 13, 1962 at 21:41 UTC · Launch Failure Thor DM-21 Agena-B — United States Air Force, to Low Earth Orbit Space Launch Complex 1W, Vandenberg SFB, CA, USA The world's 143rd orbital launch attempt, and 1st of 1962. Data: Launch Library 2, The Space Devs. Image by USAF via The Space Devs.