The DS-P1-Yu series of satellites was used to calibrate space surveillance and early warning radars. February 12, 1965 at 12:00 UTC · Launch Failure Kosmos-2I — Soviet Space Program, to Low Earth Orbit 86/1, Kapustin Yar, Russian Federation The world's 403rd orbital launch attempt, and 10th of 1965. Data: Launch Library 2, The Space Devs. Image via The Space Devs.