Defensa aérea

Sentinel A4

Also known as
  • AN/MPQ-64A4
  • AN/MPQ-64A4 Sentinel A4
  • Sentinel A4 radar

El AN/MPQ-64A4 Sentinel A4 de Lockheed Martin es un radar de defensa aérea y antimisiles del U.S. Army, montado en remolque, que reemplaza al Sentinel A3. El sensor digital AESA de banda X está diseñado para detectar misiles de crucero, UAS, aeronaves de ala fija y rotatoria, y amenazas de cohetes, artillería y morteros, mientras alimenta redes de mando de defensa aérea del Army e integradas.

Sentinel A4, Radar de defensa aérea y antimisiles, Defensa aérea
Image source: Eighth Army Showcases New Sentinel A4 Radar During Training at Camp Humphreys [Image 1 of 6]
Profile / Specs

Profile

Origin
Estados Unidos
Type
Radar de defensa aérea y antimisiles
Service note
Década de 2020-presente
Designed
2019
Produced
2023-presente
Developed from
AN/MPQ-64A3 Sentinel A3

Specifications

Banda de radar
Banda X
Arquitectura
Conjunto digital activo de barrido electrónico (AESA)
Cobertura
Vigilancia hemisférica de 360 grados y control de fuego
Amenazas
Misiles de crucero, UAS, aeronaves de ala fija y rotatoria, cohetes, artillería y morteros
Enlaces de mando y control
Diseñado para alimentar Army IBCS, FAAD-C2, IFPC y otras redes integradas de defensa aérea
Movilidad
Montado en un remolque M1095 modificado, con generador y equipo de comunicaciones en un camión de carga M1083 FMTV
Objetivo de adquisición
240 radares
Sistemas de defensa aérea compatibles

Sentinel A4 es un sensor, no un sistema de lanzamiento; las fuentes lo presentan como un radar que alimenta redes de mando y control y sistemas de defensa aérea en capas.

Compatible itemItem typeCompatibility evidence
NASAMS, Medium-range surface-to-air missile system, Air DefenseNASAMSSistema de misiles superficie-aire en red

Lockheed Martin incluye NASAMS entre los sistemas de defensa con los que Sentinel A4 puede integrarse, junto con ejemplos como IFPC, NCR-IADS, Aegis Combat Management System y NORAD.

Sources: Sentinel A4 | Lockheed Martin

Air Defense Network Role

La importancia del Sentinel A4 reside en su función de sensor dentro de la defensa aérea en capas. Suministra trazas de radar y datos de calidad de control de fuego a sistemas de mando y a sistemas de lanzamiento, en lugar de interceptar amenazas por sí mismo.

CapaFunción respaldada por fuentesPor qué importa
SensorRadar AESA tridimensional de banda X para amenazas aéreas de baja a media altitud y detección RAM.Reemplaza al Sentinel A3 con un radar multimisión capaz de buscar, seguir, clasificar, identificar e informar amenazas más variadas.
Red de mandoDiseñado para integrarse con Army IBCS y FAAD-C2, mientras proporciona datos a sistemas de mando y control.Permite que las unidades de defensa aérea pasen datos de trazas a una red de enfrentamiento más amplia en lugar de tratar el radar como un sensor aislado.
IFPCDOT&E describe a Sentinel como el radar principal de control de fuego para IFPC Inc 2, con el A4 destinado a reemplazar al A3 antes de la IOT&E de IFPC.Conecta Sentinel A4 con la capa del Army para defensa de emplazamientos fijos y semifijos contra drones, misiles de crucero y amenazas RAM.
Primeros desplieguesLockheed Martin informó de la entrega LRIP 2 y de la finalización de la Fase I de IOT&E en febrero de 2026; DVIDS documentó después entrenamiento del Eighth Army en Corea del Sur.Muestra al radar pasando de las pruebas del programa a actividades de entrenamiento y despliegue en unidades, sin afirmar uso en combate confirmado.
Timeline

Sentinel A4 Key Events

  1. El Army adjudica el contrato de desarrollo del Sentinel A4

    Lockheed Martin anunció que el U.S. Army había adjudicado a la empresa un contrato para desarrollar el radar Sentinel A4.

    Sources: U.S. Army Awards Lockheed Martin Contract to Develop Sentinel A4 Radar

  2. Primer radar completado

    Lockheed Martin informó que el primer radar Sentinel A4 se completó en agosto de 2022.

    Sources: Sentinel A4 | Lockheed Martin - First radar completed

  3. Comienzan las pruebas limitadas de usuario en White Sands

    El U.S. Army Operational Test Command describió una prueba limitada de usuario de tres semanas con un elemento Sentinel A4 de tamaño sección en escenarios de protección integrada contra incendios, defensa aérea de corto alcance y misión contra RAM.

    Sources: Modernized Sentinel sensor test eyes growing threat variety

  4. El Army aprueba la producción inicial de baja tasa

    Defense News informó de la aprobación del Army para la producción inicial de baja tasa, con 19 sistemas programados para entrega para el año fiscal 2025 y un objetivo de adquisición de 240 radares.

    Sources: US Army approves Sentinel A4 air defense radar for low-rate production

  5. Primer radar LRIP 2 entregado

    Lockheed Martin dijo que entregó al U.S. Army el primer radar Sentinel A4 de la Producción Inicial de Baja Tasa 2 y completó la primera fase de la prueba y evaluación operativa inicial.

    Sources: Lockheed Martin Delivers First Sentinel A4 from LRIP 2, Advances Toward Full-Rate Production

  6. El Eighth Army entrena con Sentinel A4 en Corea del Sur

    DVIDS documentó a soldados del U.S. Army de la 35th Air Defense Artillery Brigade entrenando con el radar Sentinel A4 recién implementado en Camp Humphreys.

    Sources: Eighth Army Showcases New Sentinel A4 Radar During Training at Camp Humphreys [Video]

Media

Sentinel A4 Videos

Sentinel A4 Images

Sentinel A4, Radar de defensa aérea y antimisiles, Defensa aérea - view 1
Source: Eighth Army Showcases New Sentinel A4 Radar During Training at Camp Humphreys [Image 1 of 6]
Sentinel A4, Radar de defensa aérea y antimisiles, Defensa aérea - view 2
Source: Eighth Army Showcases New Sentinel A4 Radar During Training at Camp Humphreys [Image 1 of 6]
Sentinel A4, Radar de defensa aérea y antimisiles, Defensa aérea - view 3
Source: Eighth Army Showcases New Sentinel A4 Radar During Training at Camp Humphreys [Image 1 of 6]
Related Weapon Systems
AN/MPQ-64 Sentinel, Mobile 3D air-defense radar, Air DefenseAir DefenseAN/MPQ-64 SentinelMobile 3D air-defense radarThe AN/MPQ-64 Sentinel is a Raytheon mobile X-band 3D air-defense radar used to cue short-range air-defense weapons, NASAMS batteries, and newer IFPC launchers against aircraft, helicopters, drones, cruise missiles, and other low-altitude threats. U.S. records identify Sentinel transfers and training for Ukraine in 2022, a DSCA notice later named the MPQ-64F1 in Ukraine's NASAMS package, and follow-on reporting documents sustainment and visual-loss evidence.
AN/TPQ-53 multimission radar, Mobile multimission counterfire and air-surveillance radar, Electronic WarfareElectronic WarfareAN/TPQ-53 multimission radarMobile multimission counterfire and air-surveillance radarThe AN/TPQ-53, commonly called Q-53, is a Lockheed Martin mobile active electronically scanned array radar that began as the Army's counterfire replacement for AN/TPQ-36 and AN/TPQ-37 Firefinder radars. Its baseline mission is to detect, classify, track, and locate mortar, artillery, and rocket launches in 90-degree or 360-degree modes, while software and open-architecture upgrades have extended the same family into counter-UAS, air-surveillance, and wider multimission radar roles.
EL/M-2084 Multi-Mission Radar, Mobile multi-mission air-defense and weapon-locating radar, Air DefenseAir DefenseEL/M-2084 Multi-Mission RadarMobile multi-mission air-defense and weapon-locating radarThe EL/M-2084 Multi-Mission Radar is IAI/ELTA's mobile AESA radar family for air surveillance, counter-rocket/artillery/mortar warning, weapon locating, and air-defense fire-control support. Public IAI reporting identifies MMR as a sensor tied to Iron Dome, David's Sling, Barak MX, and Spyder architectures, while official Canadian, Czech, and Slovak sources show the radar family also serving NATO air-surveillance and ground-force sensor roles. IAI directly names Multi-Mission Radar systems in Israel's Operation Rising Lion defense against Iranian rockets, missiles, UAVs, and other airborne threats.

Sources

Sentinel A4 | Lockheed MartinPublisher: Lockheed Martin | Note: Supports Sentinel A4 manufacturer background, replacement of Sentinel A3, mission role, integrated air-defense compatibility, mobility, and general specifications. | Accessed: 2026-07-01Sentinel A4 Product CardPublisher: Lockheed Martin | Note: Supports Sentinel A4 2025 initial fielding language, production context, and core program specifications. | Accessed: 2026-07-01DOT&E FY2024 Annual Report - Army - Sentinel A4 RadarPublisher: Director, Operational Test & Evaluation | Note: Supports Sentinel A4 radar role as a three-dimensional X-band phased array system, its counter-RAM mission, and its use in Army integrated air and missile defense. | Accessed: 2026-07-01DOT&E FY2025 Annual Report - Army - IFPC Inc 2Publisher: Director, Operational Test & Evaluation | Note: Supports Sentinel's primary fire-control radar role in IFPC Inc 2 and the planned replacement of Sentinel A3 by Sentinel A4 before IFPC IOT&E. | Accessed: 2026-07-01Modernized Sentinel sensor test eyes growing threat varietyPublisher: U.S. Army | Note: Supports the April 2023 limited user test, IBCS integration context, section-sized test configuration, and operationally realistic mission scenarios. | Accessed: 2026-07-01US Army approves Sentinel A4 air defense radar for low-rate productionPublisher: Defense News | Note: Supports Sentinel A4 low-rate initial production approval, scheduled early deliveries, and the Army acquisition objective of 240 systems. | Accessed: 2026-07-01U.S. Army Awards Lockheed Martin Contract to Develop Sentinel A4 RadarPublisher: PR Newswire / Lockheed Martin | Note: Supports the 2019 Sentinel A4 development contract award and program launch. | Accessed: 2026-07-01Sentinel A4 | Lockheed Martin - First radar completedPublisher: Lockheed Martin | Note: Supports the September 2022 Sentinel A4 progress milestone noted on Lockheed Martin's product page. | Accessed: 2026-07-01Lockheed Martin Delivers First Sentinel A4 from LRIP 2, Advances Toward Full-Rate ProductionPublisher: Lockheed Martin | Note: Supports the February 2026 LRIP 2 delivery milestone, IOT&E Phase I completion, FAAD-C2 integration, and production status. | Accessed: 2026-07-01Eighth Army Showcases New Sentinel A4 Radar During Training at Camp Humphreys [Video]Publisher: Defense Visual Information Distribution Service | Note: Supports the April 2026 Eighth Army training context at Camp Humphreys and documents the radar in U.S. Army training use. | Accessed: 2026-07-01Eighth Army Showcases New Sentinel A4 Radar During Training at Camp Humphreys [Image 1 of 6]Publisher: Defense Visual Information Distribution Service | Note: Supports public-domain image provenance for the primary Sentinel A4 gallery image. | Accessed: 2026-07-01Eighth Army Showcases New Sentinel A4 Radar During Training at Camp Humphreys [Image 2 of 6]Publisher: Defense Visual Information Distribution Service | Note: Supports public-domain image provenance for a second Sentinel A4 gallery image. | Accessed: 2026-07-01Eighth Army Showcases New Sentinel A4 Radar During Training at Camp Humphreys [Image 3 of 6]Publisher: Defense Visual Information Distribution Service | Note: Supports public-domain image provenance for a third Sentinel A4 gallery image. | Accessed: 2026-07-01Eighth Army Showcases New Sentinel A4 Radar During Training at Camp Humphreys [Image 4 of 6]Publisher: Defense Visual Information Distribution Service | Note: Supports public-domain image provenance for a fourth Sentinel A4 gallery image. | Accessed: 2026-07-01