New LTADMS Radar Doubles Patriot PAC-3 MSE SAM Capabilities
Rocket A PAC-3 MSE lifts off from a MEADS launcher during a test flight at White Sands Missile Range.
System Defense The U.S. Army Patriot has completed test flights with the Patriot Advanced Capability-3 Missile Segment Enhancement (PAC-3 MSE) missile and the Lower Tier Air and Missile Defense Sensor (LTADMS) radar to demonstrate 360-degree azimuth coverage and engagement capabilities. The LTADMS radar is designed to replace the Patriot's existing AN/MPQ-65 radar.
test firing
This was the ninth test firing to integrate Lockheed Martin's PAC-3 MSE and Raytheon's LTADMS radar systems, which both companies announced on August 18, 2025. The test confirmed the successful integration of the LTADMS radar with the recently delivered Large Tactical Power Source (LTPS).
“The increased power provided by LTPS enables LTAMDS to achieve its full combat potential,” Raytheon explained. “The high power and full coverage of LTAMDS enables it to defeat massive coordinated attacks, including those using drones, modern aircraft, as well as ballistic, cruise and hypersonic missiles,” the company says.
“LTAMDS’s 360-degree sector sensing capabilities are specifically designed to defeat massive, coordinated enemy attacks,” said Tom Laliberty, president of Raytheon’s Ground-Based Air Defense Systems business unit. Brian Kubik, vice president of PAC-3 programs at Lockheed Martin, said PAC-3 “continues to demonstrate advanced and robust performance in increasingly complex operational environments, providing 360-degree coverage against threats from any direction.”
This follows the recent testing phase of the Milestone C radar prototype, which marked the beginning of the transition from prototype to production and deployment. However, both companies have so far only presented conceptual versions of the tests.
During recent tests, the PAC-3 MSE SAM hit a target for the first time
A few days earlier, the U.S. Army released its own statement , saying that during the test, the LTAMDS system detected, tracked, and classified a simulated air-breathing threat via the Integrated Battle Management System. The Army explained that this led to several firsts in the program, including the aforementioned first integration of the LTPS generator with the LTAMDS radar, the first successful interception of an aerodynamic high-speed target using the LTAMDS radar’s “secondary sector array,” and the first successful interception using the low-rate initial communications system (IBCS).
“This test demonstrates the next phase of LTAMDS capability development to deliver a state-of-the-art 360-degree sensor for the U.S. Army’s integrated air and missile defense architecture,” said Lt. Col. Farmer, LTAMDS product manager. “The LTAMDS program remains focused on developing and testing at the highest possible speed to ensure we deliver the robust, comprehensive defensive capability the warfighter needs to fight and win when needed.”
The Army and industry agree that: “…this is a major step toward the implementation of a modernized Integrated Air and Missile Defense (IAMD) architecture. The Army’s next-generation air and missile defense system will provide full 360-degree coverage and increased operational flexibility to defend against a broad spectrum of air threats.”
Growing Need for PAC-3 MSE
In early July 2025, Defense One reported that the Patriot SAM was among the munitions the Army had requested in its 2026 budget request to increase “magazine depth.” Citing budget documents, the report stated that “the goal to acquire a larger batch of Patriot Advanced Capability-3 MSE missiles would quadruple from 3376 to 13773 if Congress approved the Pentagon’s request.”
Air and missile defense radar
On October 27, 2024, the U.S. Army awarded Lockheed Martin a $752 million contract to increase annual production of PAC-3 MSE missiles from 550 to 650 units. On November 14, 2024, the company announced the contract with the U.S. Army, adding that it had already seen a 30% increase in PAC-3 production in the eight months prior to the contract award, with plans to increase it by another 20% next year, according to a press release.
By the end of that year, Lockheed said it would produce 500 Patriot PAC-3 MSE missiles, making it the 3th PAC missile since production began, adding that the effort was intended to “meet global demand” for the advanced missile. In a U.S. Army press release, Major General Frank Lozano, program executive officer for Missiles and Space, called the PAC-XNUMX MSE a “key component” of the U.S. Army’s air defense strategy across European Command (EUCOM), Central Command (CENTCOM), and Indo-Pacific Command (INDOPACOM), given the system’s advanced capabilities against ballistic and cruise missiles.
In the Pacific region, work is in full swing to equip the Guam base with missile defense systems to protect against Chinese missiles. Thus, the mention of the Indopac command may mean that the Patriot SAM will be intended there as a supplement to the Standard-3 anti-missiles.
Archive image of the U.S. Army Integrated Battle Command System (IBCS)
In a November 2024 Army statement, the PAC-3 MSE was described as an advanced, capable, and versatile next-generation interceptor with increased range, speed, and maneuverability to defeat tactical ballistic missiles, cruise missiles, and aircraft. Additionally, the PAC-3 MSE’s compatibility with existing Patriot launchers and flexible configurations allow for more tactically optimal positioning and deployment.
Patriot Upgrades and New Missile Variants
The PAC-3 MSE, designated MIM-104E, is the most advanced of the Patriot interceptor family, which also includes the MIM-104D PAC-2 GEM (Guidance Enhanced Missile) series – GEM-C, GEM-T, and GEM+. The PAC-3 series of missiles represented a near complete redesign of the entire system, including a Command and Control (C2) system now compatible with Link 16 and an improved communications suite.
By 2017, the AN/MPQ-65 radar also received GaN-based transmitters, becoming a modification of the AN/MPQ-65A. The MIM-104E missile from the PAC-3 MSE program, launched in 2004, featured 180 miniature pulsed solid-fuel radial microthrusters in the nose for better maneuverability and a dual-pulse solid-fuel cruise motor to ensure the missile achieves high speed for "strike-to-kill". The new Ka-band active homing head independently acquires targets in the final section of the trajectory without corrections and radio guidance commands from the ground-based SNR, which increases its effectiveness against high-speed ballistic targets.
The PAC-3 MSE is compatible with the Medium Extended Air Defense System Multifunction Fire Control Radar (MFCR), allowing it to receive signals from external sensors and interoperate with other NATO allied radar assets. The U.S. Army accepted the first PAC-3 MSE interceptors in October 2015, declaring initial operational capability (IOC) by August 2016.
Archive photo: Launch of a Patriot PAC-3 MSE SAM.
MEADS and LTAMDS radars
Two test firings of the MEADS-equipped PAC-3 MSE missile were conducted on November 29, 2012, and November 6, 2013, at White Sands Missile Range in New Mexico. The first test tested the full perimeter of the MEADS radar, covering 360 degrees of azimuth, with the PAC-3 MSE performing a "unique over-the-shoulder maneuver to engage a target attacking from behind a MEADS firing position."
During a November 2013 test, the MEADS air and missile defense radar “intercepted and destroyed two targets simultaneously attacking from opposite directions in a tense demonstration of its 3-degree surveillance capabilities,” the press release said. All elements of the MEADS system were tested and “performed as planned,” including the MEADS XNUMX-degree surveillance radar, the MEADS network weapon station, two lightweight launchers that fired PAC-XNUMX MSE missiles, and the MEADS XNUMX-degree multi-target designator.
The LTADMS program began with a $2017 million contract awarded to Raytheon in October 383 for an improved and modernized version of the Patriot's primary radar. The new system is capable of simultaneously detecting and tracking drones, cruise and ballistic missiles, and aircraft across the entire front, feeding information into the Army's expanded Integrated Battle Management System (IBCS) architecture.
At a press conference held at the Center for Security and International Studies (CSIS) earlier this month, U.S. Army Deputy Chief of Staff General James Mingus outlined the capabilities of LTADMS: “The system has a range of up to 85 kilometers in altitude and an intercept range of up to 300 kilometers against aerodynamic and ballistic targets. So it significantly increases the altitude of the target and the range, making it XNUMX degrees.”
“So you can take the same 15 Patriot battalions that we have today, equip them with IBCS and LTAMDS, and essentially, operationally, it immediately doubles their capability,” Mingus added. “You get the equivalent of about 30 Patriot battalions, because instead of deploying them in batteries, you can break them up and disperse them in a much more tactical way.”
Information