ESSA-6 (or TOS-D) was a spin-stabilized operational meteorological satellite. Its name was derived from that of its oversight agency, the Environmental Science Services Administration (ESSA).
ESSA-6 was launched on November 10, 1967, at 18:00 UTC. It was launched atop a Delta rocket from Vandenberg Air Force Base, California, USA. The spacecraft had a mass of 299kg (659lb) at the time of launch. ESSA-6 had an inclination of 102.12°, and orbited the Earth once every 114.8 minutes. Its perigee was 1410km (880miles) and its apogee was 1488km (925miles).