Seasat
Orbiter
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Seasat was the first Earth-orbiting satellite designed for remote sensing of the Earth's oceans and had on board one of the first spaceborne synthetic-aperture radar. Wikipedia
Launch date: June 28, 1978
Manufacturers: Jet Propulsion Laboratory, Ball Aerospace & Technologies, and Lockheed Corporation
Orbit height: 497 mi
Launch site: Vandenberg Space Launch Complex 3
Year: 1978