Dnestr radar

Dnestr/Dnestr-M/Dnepr
	A US military artist's concept of a Dnestr-M/Dnepr
Country of origin	Soviet Union, Russia
Designer	Mints Radiotechnical Institute
Introduced	1963 (Dnestr-M)
No. built	15
Type	Space surveillance (Dnestr) ; Early warning radar (Dnestr-M, Dnepr, Dnepr-M)
Frequency	154–162 MHz (VHF)
Beamwidth	0.5°(N-S), 10°(E-W)
Pulsewidth	0.8 ms long
Range	3,000 kilometres (1,864 mi) 1,900 kilometres (1,181 mi) for targets with an area of 1 m2
Diameter	Each array is 244 metres (801 ft) long, 20 metres (66 ft) high and 12 metres (39 ft) wide
Azimuth	30°, 30 per transmitter giving 120 in total
Elevation	5° to 35°
Precision	± 1 km range, 10 min azimuth, 50 min elevation, 5 m/s range rate
Power	Peak power of 1.25 MW per transmitter ; Radiating power 200 kW ; Consumed power 2100 kW
Other Names	NATO: Hen House ; GRAU: 5N15 (Dnestr), 5N15M (Dnestr-M), 5N86 (Dnepr)

Dnestr radar (Russian: Днестр) and Dnepr radar (Russian: Днепр), both known by the NATO reporting name Hen House,^{[note 1]} are the first generation of Soviet space surveillance and early warning radars. Six radars of this type were built on the periphery of the Soviet Union starting in the 1960s to provide ballistic missile warnings for attacks from different directions. They were the primary Soviet early warning radars for much of the later Cold War. In common with other Soviet and Russian early warning radars they are named after rivers, the Dnestr and the Dnepr.^{[note 2]}

The Dnestr/Dnepr radars were intended to be replaced by the newer Daryal radars starting in the 1990s. Only two of the planned Daryal radars became operational, due to issues such as the dissolution of the Soviet Union. As of 2012, the Russian early warning network still consists of some radars of this vintage. It is likely that all the existing radars will be replaced by the third generation Voronezh radars by 2020.

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Dnestr radar

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