Yeniseysk-15

Yeniseysk-15 radar installation
Siberia, Russia
US military artist's drawing of the Daryal radar at Krasnoyarsk
Yeniseysk-15 radar installation
Coordinates	57°52′05″N 93°07′07″E / 57.8680°N 93.1186°E / 57.8680; 93.1186
Type	Radar station
Code	OS-3
Height	100 metres (328 ft) receiver building
Site information
Condition	Demolished
Site history
Built	1983 (1983)
Built by	Soviet Union
Materials	concrete

Yeniseysk-15 was the site of a disputed Soviet phased array radar near Yeniseysk in Krasnoyarsk Krai, Siberia. The never operational Daryal radar installation was demolished in 1989 after the United States claimed it was in breach of the Anti-Ballistic Missile Treaty.

The radar being built at Yeniseysk was a Daryal-U (NATO codename "Pechora"), a large phased array radar consisting of two separate large phased-array antennas 850 metres (2,789 ft) apart. The transmitter array was 30 by 40 metres (98 ft × 131 ft) and the receiver was 80 by 80 metres (260 ft × 260 ft) in size. The system is a VHF system operating at a wavelength of 1.5 to 2 meters (150 to 200 MHz). The claimed range of a Daryal installation is 6,000 kilometres (3,728 mi).

Originally, at least seven Daryal facilities were planned, however, only the first two facilities completed, Pechora and Gabala, were ever operational. Two other Daryal-U type were to be built at Balkhash and Mishelevka, Irkutsk, neither were completed before the collapse of the Soviet Union.

The Soviet Union started a programme to replace all Dnepr (NATO: Hen House) radars with the intention that this would be complete by the mid 1990s and five Daryals were under construction by 1983. The early warning system had a gap as it did not cover submarine launches of ballistic missiles in the Pacific Ocean. A radar site was needed that would face north east covering this area. The 1972 anti-ballistic missile treaty placed restrictions on the location of early warning radars. Article VI b) states that the United States and the Soviet Union agree: