ESSA-4
ESSA-4 was a spin-stabilized operational meteorological satellite. Its name was derived from that of its oversight agency, the Environmental Science Services Administration.Launch
ESSA-4 was launched on January 26, 1967 at 17:31 UTC. It was launched atop a Delta rocket from Vandenberg Air Force Base, California, U.S.. The spacecraft had a mass of at the time of launch. ESSA-4 had an inclination of 102°, and an orbited the earth once every 113.4 minutes. Its perigee was and its apogee was.
