The Olenegorsk HEN HOUSE missile early warning radar system is in Russia's Leningrad military district. Work began on the system in 1963, with state tests conducted in the trans-polar area between 1968 and 1976. The Dnestr-M system is characterized by a Y-array, and it is equipped with transceiving phased array 200 meters long and 20 meters high. The radar is placed on the sloped surface of a building 200 meters long and up to 75 meters high. It can monitor a sector of space in the range of azimuths 220-3,100 km and at a distance up to 5,000 kilometers.
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