ESRS (Environmental Sciences Research Satellite, also (Research Satellite for Environmental Sciences) was a small magnetosperic research satellite built by the US Air Force Cambridge Research Lab. June 25, 1964 at 01:40 UTC · Launch Failure Scout X-4 — United States Air Force, to Low Earth Orbit Space Launch Complex 5, Vandenberg SFB, CA, USA The world's 334th orbital launch attempt, and 41st of 1964. Data: Launch Library 2, The Space Devs. Image by U.S. Air Force (Department of Defense Image Use Policy) via The Space Devs.