Duga radar
Videos
Duga was an over-the-horizon radar system used in the Soviet Union as part of its early-warning radar network for missile defence. It operated from July 1976 to December 1989. Two operational Duga rad
The array at Chernobyl, Ukraine, viewed from a distance in 2014
Duga-1 array within the Chernobyl Exclusion Zone. The array of pairs of cylindrical/conical cages on the right are the active elements, fed at the facing points with a form of ladder line suspended from stand-off platforms at top right. A backplane axial reflector of small wires is visible left of centre, most clearly at the bottom of the image. The elements appear to be a modified type of cage or bi-conical dipole providing wide operating bandwidth.
Steel structure of Duga-1 from below
Over-the-horizon radar
Videos
Over-the-horizon radar, sometimes called beyond the horizon radar, is a type of radar system with the ability to detect targets at very long ranges, typically hundreds to thousands of kilometres, beyo
Duga radar
…Duga (Russian: Дуга, lit. 'arc' or 'curve') was an over-the-horizon radar (OTH) system used in the Soviet Union as part of its early-warning radar network for missile defence. It operated from July 1976 to December 1989. Two…
How a skywave OTH radar works: A powerful shortwave signal from a large transmitting antenna (left) reaches a target beyond the horizon by refracting off the ionosphere, and the echo signal from the target (right) returns to the receiving antenna by the same route. In practice, the beams are much closer to the horizon than shown here.
MADRE over-the-horizon radar at the NRL's Chesapeake Bay Detachment
Coverage of the three U.S. Navy ROTHR stations in Texas, Virginia, and Puerto Rico