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| COBRA DANE | |
|---|---|
| Name | COBRA DANE |
| Caption | AN/FPS-108 radar at Shemya Island |
| Country | United States |
| Type | Phased array early-warning radar |
| Site | Shemya Island, Aleutian Islands |
| Operator | United States Air Force / United States Space Force |
| Introduced | 1977 |
| Manufacturer | Raytheon / Lockheed Martin |
| Frequency | L-band |
| Range | ~6,000 km (ballpark) |
COBRA DANE is a long-range, phased-array radar system located on Shemya Island in the Aleutian chain, established to collect strategic intelligence, track ballistic missiles, and support arms-control verification. It has been operated by United States Air Force and later Space Force units, integrated into wider sensor networks involving agencies such as the Defense Intelligence Agency, North American Aerospace Defense Command, and the Missile Defense Agency. COBRA DANE played roles in monitoring Soviet and Russian activities, supporting treaty verification with organizations like the United Nations and task forces including Task Force 73 and bilateral efforts with Japan Self-Defense Forces.
COBRA DANE is an AN/FPS-108 L-band electronically scanned phased-array radar deployed to provide surveillance of the western Pacific and northern hemisphere trajectories, cooperating with assets like the PAVE PAWS sites, Perimeter Acquisition Radar Characterization System, and shipborne radars such as the Aegis Combat System. It serves intelligence consumers including the National Reconnaissance Office, National Geospatial-Intelligence Agency, and National Security Agency while contributing data streams to organizations such as STRATCOM, INDOPACOM, and regional partners like the Japan Maritime Self-Defense Force and Republic of Korea Armed Forces. The installation is sited to observe launches from ranges including the Kamchatka Peninsula, Siberia, and the broader Russian Far East.
Development of the system originated in the 1970s amid heightened strategic competition involving actors such as the Soviet Union, NATO members like the United Kingdom, and treaty frameworks including the Strategic Arms Limitation Talks and the SALT II process. The program involved contractors such as Raytheon, Lockheed Corporation, and later industrial partners like General Dynamics and Boeing. Deployment in 1977 followed test campaigns with platforms including the Boeing 747-based instrumentation, satellite collections from DSP satellites, and coordination with sensors like Distant Early Warning Line stations. During the 1980s, COBRA DANE supported monitoring of events including Soviet submarine exercises and missile tests from ranges near Novaya Zemlya and Plesetsk Cosmodrome.
The radar uses an L-band phased-array antenna with solid-state electronics and digital beamforming concepts pioneered by firms such as Raytheon Technologies and research from institutions like Massachusetts Institute of Technology and Stanford University. Key hardware components trace to suppliers including Texas Instruments, Northrop Grumman, and ITT Corporation. Performance metrics align with strategic sensors like the AN/FPS-115 PAVE PAWS and space-based sensors such as SBIRS and DSP program elements. COBRA DANE's architecture integrates signal processors akin to designs from IBM and Honeywell and uses telemetry and communication links compatible with systems fielded by U.S. Naval Research Laboratory and MIT Lincoln Laboratory.
Operational employment involved coordination with commands including North American Aerospace Defense Command and U.S. Strategic Command to provide early warning on intercontinental trajectories and theater ballistic missile launches. COBRA DANE supported operations alongside assets such as Aegis BMD ships, THAAD batteries, and Patriot units during crisis responses tied to actors like North Korea, and in exercises involving partners such as Australian Defence Force and Canadian Forces. The radar has been modernized through collaborations with contractors like Raytheon and Lockheed Martin to maintain interoperability with sensor webs including Global Positioning System timing references and fiber backhaul to nodes operated by the Defense Information Systems Agency.
Data processing chains combine techniques from digital signal processing research at MIT Lincoln Laboratory and analytic frameworks used by National Reconnaissance Office and Defense Intelligence Agency analytic centers. Integration includes linkages to command-and-control networks run by U.S. Strategic Command and passes tracks into mission systems used by NORAD and regional centers such as Alaska NORAD Region headquarters. Fusion algorithms incorporate inputs from space-based sensors like SBIRS GEO and Space-Based Infrared System components, surface and subsurface data from the Navy, and intelligence products from agencies including the Central Intelligence Agency and National Geospatial-Intelligence Agency.
COBRA DANE's presence influenced strategic stability dialogues involving the Soviet Union, Russian Federation, and NATO partners, informing arms-control verification regimes such as the Intermediate-Range Nuclear Forces Treaty monitoring and SALT-era verification. It provided high-value data during contingencies involving actors like China and North Korea that affected policy deliberations at the White House and within U.S. Department of Defense planning cells. The sensor contributed to missile defense testbeds used by the Missile Defense Agency and shaped procurement considerations for systems fielded by contractors including Lockheed Martin and Raytheon Technologies.
Controversies have arisen around issues of basing on Shemya Island affecting local communities and coordination with host-nation actors such as the Aleut people and environmental stakeholders. Technical incidents included outages tied to harsh Aleutian weather impacting operations and debates over transparency with international partners including Moscow-based analysts during the late Cold War and post-Cold War periods. Program disputes involved budgetary reviews by bodies such as the United States Congress and oversight from committees like the Senate Armed Services Committee and House Armed Services Committee regarding upgrades, force structure, and integration with other systems implemented by Defense Advanced Research Projects Agency-sponsored initiatives.
Category:United States military radars