The Don-2N radar (Russian: Дон-2Н, NATO: Pill Box) is a large missile defense and early warning passive 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 in the Pushkino district of Moscow it is a quadrangular frustum 33 metres (108 ft) tall with sides 130 metres (427 ft) long at the bottom, and 90 metres (295 ft) long at the top. Each of its four faces has an 18 metres (59 ft) diameter Ultra high frequency band radar giving 360 degree coverage. The system is run by an Elbrus-2 (Russian: Эльбрус-2) supercomputer.
Don-2N radar in Pushkino
|Country of origin||Soviet Union, Russia|
|Introduced||1991  1996  Started building 1978, commissioned 1989, operational 1996|
|Type||Early warning radar, missile defence, space surveillance|
|Frequency||SHF 7.5 sm|
|Range||1,500–2,000 kilometres (930–1,240 mi) size of target 5cmx5cm or 2 inchesx 2 inches|
|Diameter||18 metres (59 ft) |
|Other Names||NATO: Pill Box|
It has a range of 3,700 km for targets the size of a typical ICBM warhead.
Under the 1972 Anti-Ballistic Missile Treaty both the United States and the Soviet Union had to designate one area to protect from missile attack. The USA chose North Dakota and the Soviet Union chose Moscow. The Don-2N radar is designed to be the control centre of the system and can operate autonomously if connection is lost to its command and control centre.
- Многофункциональная радиолокационная станция "Дон-2Н" [Multifunction radar Don-2N] (in Russian). Russian Ministry of Defence. n.d. Retrieved 2012-02-18.
- РЛС ПРО [ABM radar] (in Russian). RTI Mints. n.d. Archived from the original on 2012-01-23. Retrieved 2012-02-18.
- "Valdai Club 3: Touring the Don-2N Radar Facility". Russian Military Reform. 2011-06-02. Retrieved 2012-02-19.
- "Рлс Про".
- Bret Lortie, "A Do It Yourself SIOP," Bulletin of the Atomic Scientists, July/August, 57/4, (2001): p 29, http://journals.sagepub.com/doi/pdf/10.2968/057004008
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