Don-2N radar

The Don-2N radar is a large missile defense and early warning active electronically scanned array radar outside Moscow, and a key part of the Russian A-135 anti-ballistic missile system designed for the defense of the capital against ballistic missiles. Located near Sofrino in Pushkinsky District of Moscow Oblast, it is a quadrangular frustum 33 metres tall with sides 130 metres long at the bottom, and 90 metres long at the top. Each of its four faces has an 18 metres diameter Super high frequency band radar giving 360 degree coverage. To the right of each circular search and track array, separated by a vertical structure for shielding, is a square antenna array for guiding the interceptor missile by data link. The system is run by an Elbrus-2 supercomputer. ()