Serpukhov-15 (Russian: Серпухов-15) is a military townlet near Kurilovo in Kaluga Oblast which is the location of the western control centre for Russia's Oko satellites. These give early warning of ballistic missile launches, mainly from the continental United States. The site is part of the Main Centre for Missile Attack Warning and information from here is processed at the Russian Aerospace Defence Forces centre in Solnechnogorsk and could be used, together with early warning radar such as the Voronezh, for launch on warning of the A-135 anti-ballistic missile system. A similar facility is located at Pivan-1 in the Russian Far East.