ESSA-7 (or TOS-E) was a spin-stabilized operational meteorological satellite. Its name was derived from that of its oversight agency, the Environmental Science Services Administration (ESSA).
ESSA-7 was launched on August 16, 1968 at 11:31 UTC. It was launched atop a Delta rocket from Vandenberg Air Force Base, California, USA. The spacecraft had a mass of 145 kilograms (320 lb) at the time of launch. ESSA-7 had an inclination of 101.72°, and an orbited the earth once every 114.9 minutes. Its perigee was 1,432 kilometers (890 mi) and its apogee was 1,476 kilometers (917 mi).
This article incorporates public domain material from the National Aeronautics and Space Administration document: "ESSA 7". Retrieved June 4, 2018.