Joint Surveillance System

Joint Surveillance System. It is a combined air defense and air traffic control radar network operated by the United States Air Force and the Federal Aviation Administration across the continental United States, Alaska, and Canada. Established during the Cold War, it provides a shared picture of airspace for both national defense and civilian aviation safety, serving as a critical component of North American Aerospace Defense Command's surveillance architecture. The system integrates data from military and civilian sensors to enable coordinated responses to potential air threats and routine air traffic management.

Overview

The primary mission is to provide seamless surveillance and identification of all aircraft operating within its area of responsibility, which encompasses the sovereign airspace of the United States and Canada. It functions as the backbone for the North American Aerospace Defense Command's air warning system, feeding data to command centers like the Cheyenne Mountain Space Force Station. By merging inputs from long-range military radars, such as those from the Alaska Radar System, with data from the FAA's extensive network, it creates a unified air picture. This integrated data supports a wide range of operations, from directing Air National Guard interceptors during Operation Noble Eagle to facilitating daily air traffic control across major centers like Jacksonville Air Route Traffic Control Center.

History

Development was initiated in the late 1970s to replace and consolidate several aging radar networks, including portions of the Semi-Automatic Ground Environment system. The system achieved initial operational capability in 1979, a period marked by heightened tensions with the Soviet Union and concerns over bomber and cruise missile threats. Its creation formalized the partnership between the United States Department of Defense and the Federal Aviation Administration, building upon earlier cooperation during the Cold War. A significant early test of its integrated capabilities occurred following the Korean Air Lines Flight 007 incident in 1983, which spurred enhancements to North American air sovereignty procedures. The system's role was further cemented after the September 11 attacks, when it became central to continuous homeland air defense operations.

System components

The architecture consists of a geographically dispersed network of sensor sites, communication links, and processing centers. Primary long-range surveillance is provided by Air Force-operated radars like the AN/FPS-117 and the AN/FPS-124, which are often co-located with FAA radars at sites such as those in Maine and Washington. Gap-filler radars, including the AN/TPS-78, cover low-altitude approaches and terrain shadows. Sensor data is fused and processed by the AN/FYQ-93 radar processor system at regional Sector Operations Control Centers. This processed track data is then distributed via secure networks to major command nodes, including the NORAD Combat Operations Center and the Eastern Air Defense Sector. The system is also supplemented by airborne assets like the E-3 Sentry AWACS during exercises or heightened alert periods.

Operational use

On a daily basis, personnel from the United States Space Force, Air Combat Command, and the Federal Aviation Administration monitor the integrated air picture for anomalies. The system enables the rapid identification and tracking of aircraft of interest, supporting the launch of alert fighters from bases like Joint Base Elmendorf-Richardson. It played a continuous role in homeland defense during the prolonged period of Operation Noble Eagle. Furthermore, it supports major national security events, such as providing enhanced surveillance during a State of the Union address or a Super Bowl, coordinating with agencies like the United States Secret Service. The data is also vital for managing airspace during natural disasters, assisting the Federal Emergency Management Agency with response and recovery efforts.

Upgrades and modernization

Ongoing efforts focus on replacing legacy components and integrating new technologies to counter evolving threats. Modernization programs have included the replacement of older radar models with the more capable AN/FPS-117 and the development of the Battle Control System-Fixed as a future command and control framework. A key initiative is the integration of data from the Space-Based Infrared System and other non-radar sources to improve threat detection timelines. The shift towards an open-systems architecture aims to facilitate the incorporation of new sensors, including those from the United States Space Force's Space Domain Awareness programs. These upgrades ensure continued interoperability with key allies and partner systems, maintaining robust defense ties with the Royal Canadian Air Force and other NATO members.

Category:Military electronics of the United States Category:Air defense Category:North American Aerospace Defense Command