Main Centre for Missile Attack Warning

The 820th Main Centre for Missile Attack Warning (Russian: Главный центр предупреждения о ракетном нападении (Гцпрн), romanized: GTsPRN) is the Russian Space Forces early warning network against ballistic missile attack. It has headquarters in the village of Timonovo near Solnechnogorsk outside Moscow and is part of the Russian Space Forces of the Aerospace Forces.

Source: Wikipedia — Main Centre for Missile Attack Warning (CC BY-SA 4.0)