US-K

Upravlyaemy Sputnik Kontinentalny is a series of Russian, previously Soviet, satellites used to detect missile launches as part of the Oko system. It consists of a constellation of satellites, usually in molniya orbits, designated under the Kosmos system. The satellites are built by the company NPO Lavochkin and are launched on Molniya-M rockets. Oko can be directly translated as the Russian word for eye. As of June 2014, only two of the eight satellites in orbit were still functional, rendering the system inoperable.

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Wikidata
86 produced, 
early warning satellite, NPO Lavochkin, Russia, Soviet Union, 
Russia, Dong Fang Hong 2, early warning satellite, Ekran, 

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Frameless

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