The DS-P1 series of satellites was used to calibrate space surveillance and early warning radars. August 6, 1963 at 06:07 UTC · Launch Successful Kosmos-2I — Soviet Space Program, to Low Earth Orbit Mayak-2, Kapustin Yar, Russian Federation The world's 266th orbital launch attempt, and 42nd of 1963. Data: Launch Library 2, The Space Devs. Image via The Space Devs.