The Dunay-3 (Russian: Дунай-3М, Dunay-3M; NATO: Dog House) was an upgrade of the Dunay-2 located in Kubinka, Moscow and became operational in 1968. Following an extensive upgrade in 1978 it was renamed Dunay-3M as part of the upgraded A-35M ABM system. It consisted of separate receiver and transmitter buildings separated by 2.5 kilometres (1.6 mi).
The transmitter covered two sectors (roughly north and south) and its array was 200 metres (660 ft) long and 30 metres (98 ft) high. The power of each sector was about 3MW. The receiver was a building 100m x 100m containing 2 phased array radar as well as the command and control centre for the A-35 system. The range of the system was 2,500 kilometres (1,600 mi).
The radar was functional until it caught fire on May 8, 1988.
Read more about this topic: Dunay Radar