The DS-U2-M satellites were Soviet technological demonstrations satellites launched as part of the Dnepropetrovsk Sputnik program. They tested atomic clocks in space. November 26, 1965 at 12:14 UTC · Launch Successful Kosmos 11K63 — Soviet Space Program, to Low Earth Orbit 86/1, Kapustin Yar, Russian Federation The world's 499th orbital launch attempt, and 106th of 1965. Data: Launch Library 2, The Space Devs. Image by Gunter Krebs via The Space Devs.