The radar is a Dneprphased array radar, and was the last one of this type to be built by the Soviet Union. It consists of a central building and two long wings over 250 metres long; each wing is a separate radar array. One had an azimuth of 196° and the other 260°. The radar had a range of. The radar started to be built in the early 1970s. Some sources say that it started operating in 1977, others say it became operational on 16 January 1979. A second generation radar, a Daryal-UM, was started at a different location outside of Mukacheve, away, north of the village of Pistryalovo. It was planned that this would replace the Dnepr but construction stopped in 1991, when the Soviet Union collapsed, and never restarted. The Daryal has separate receiver and transmitter buildings, at Mukachevo they are apart. The transmitter building is ruined, was being demolished in autumn 2011, and is at. The larger receiver building has been demolished and was located at. The azimuth of the Daryal was 218°.
Dispute with Ukraine
In 1991 the Soviet Union collapsed and the station ended up in the newly independent country of Ukraine, together with the radar in Sevastopol. Russia signed a 15-year agreement with Ukraine in 1992 to rent both radars for $840,000 per year, although unlike other overseas stations the radar was to be staffed by Ukrainians not Russians. In 2005 management of the radars transferred from the military to the civil Ukrainian National Space Agency and the rent increased to $1.3 million, although Ukraine asked for more. In 2008 Russia decided to stop using information from the two Ukrainian radar stations. According to some commentators it was partly about the then Ukrainian government's stated intention to join NATO. In 2007 Vladimir Popovkin had stated that Russia intended to duplicate or replace foreign radar stations as it could not rely on them in times of crisis. Replacing the station would reduce any leverage Ukraine was gaining over Russia from the ability to control access to the data. Pragmatic reasons were given for ending the lease. Popovkin said that the radars went out of warranty in 2005, and would cost $20m to modernise. In addition Russia said that the data from Sevastopol was unreliable due to pirate radio broadcasts from fishing boats in the Black Sea. Furthermore, it had concerns with the quality of the data due to the civilian rather than military operators. Data from Ukraine stopped on 26 February 2009 and Russia declared that a new Voronezh radar station in Armavir had begun operation on the same date, replacing the lost coverage. Following this the Ukrainian government announced that the stations would be closed for a month for maintenance and then used part-time for space surveillance, being part of an organisation called SKAKO.
