Sentinel A4 Radar

Full Specifications

Sentinel A4 Radar, Mobile AESA Air Surveillance System

The Sentinel A4 radar is a next-generation mobile air and missile defense sensor deployed by the U.S. Army. It provides 360-degree coverage, rapid target acquisition, and tracking for aircraft, helicopters, cruise missiles, and unmanned aerial systems. Designed to replace legacy Sentinel radars, the system enhances situational awareness and networked air defense integration.

Equipped with an active electronically scanned array (AESA), Sentinel A4 delivers fast update rates, high-resolution 3D tracking, and strong resistance to electronic countermeasures. It integrates with the Integrated Battle Command System (IBCS) and Forward Area Air Defense Command and Control (FAAD-C2), supporting layered defense across tactical and theater-level operations.

Manufacturer

Sentinel A4 is developed and produced by Lockheed Martin at their Radar and Sensor Systems division in the United States. The radar is part of the U.S. Army’s modernization program for short- and medium-range air defense, leveraging decades of Lockheed Martin expertise in digital AESA radar technology.

Speed and Range

The radar detects and tracks high-speed aerial threats, including jets, cruise missiles, and UAVs, at ranges up to 200 kilometers depending on target size and altitude. It can simultaneously track hundreds of targets and provides continuous 360-degree azimuth and wide elevation coverage.

Cost and Price

Official unit costs are not publicly disclosed, but estimates place the system in the tens of millions of U.S. dollars per unit, depending on configuration, support, and integration with Army command systems.

FAQs