SCORE or Signal Communications by Orbiting RElay was the world first purpose built communications satellite. It provided a second test of a communications relay system after the first being provided by Pioneer 1. December 18, 1958 at 23:02 UTC · Launch Successful SM-65B Atlas — US Army, to Low Earth Orbit Launch Complex 11, Cape Canaveral SFS, FL, USA The world's 31st orbital launch attempt, and 28th of 1958. Data: Launch Library 2, The Space Devs.