GRS (Geophysical Research Satellite) was a geophysics experiment test built by the Cambridge Research Lab (CRL). Data was obtained for 13 orbits, after which time the satellite ceased working due to a failure in the primary power supply. June 28, 1963 at 21:19 UTC · Launch Successful Scout X-4 — United States Air Force, to Low Earth Orbit Launch Area 3, Wallops Flight Facility, Virginia, USA The world's 259th orbital launch attempt, and 35th of 1963. Data: Launch Library 2, The Space Devs. Image by U.S. Air Force (Department of Defense Image Use Policy) via The Space Devs.