AN/SPG-62

AN/SPG-62
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Name	AN/SPG-62
Country	United States
Introduced	1950s
Type	Fire-control radar
Frequency	X-band
Range	sector dependent
Manufacturer	Raytheon

AN/SPG-62 The AN/SPG-62 is an X-band naval fire-control radar developed in the United States during the Cold War for use with surface-to-air and surface-to-surface weapons systems. It served as an illumination and tracking radar paired with missile systems and gun directors on a wide range of United States Navy ships, contributing to engagements during crises and conflicts involving forces such as the United States Atlantic Fleet and United States Pacific Fleet. The system was integrated into combat systems alongside sensors and weapons from manufacturers like Raytheon Technologies and platforms built by shipbuilders including Bath Iron Works and Ingalls Shipbuilding.

Introduction

The AN/SPG-62 emerged in an era of rapid naval modernization led by programs like the Fleet Rehabilitation and Modernization efforts and the expansion of guided missile technology after World War II. Early deployments were driven by requirements from organizations including the Naval Sea Systems Command and testing by Naval Air Systems Command personnel at ranges such as Patuxent River and installations like Naval Station Norfolk. The radar was fielded as part of integrated weapons suites on ships supporting operations during episodes such as the Vietnam War and later Cold War confrontations, interoperating with combat direction systems influenced by doctrines from commands like Commander in Chief, U.S. Pacific Fleet and allied navies including the Royal Navy and Royal Australian Navy.

Design and Technical Description

The AN/SPG-62 is an X-band, monopulse, continuous wave/pulse radar optimized for target illumination and fire-control guidance for semi-active homing missiles and gunfire control. It was engineered by defense contractors working under contracts from agencies such as the United States Department of Defense and tested in cooperation with research centers including Naval Research Laboratory and MIT Lincoln Laboratory. The design incorporated rotating and stabilized antennas, servo systems from suppliers with ties to companies like General Dynamics and Honeywell, and signal processing hardware influenced by developments from Bell Labs and Fairchild Semiconductor. Its electronics used solid-state components increasingly adopted across projects like Aegis Combat System and earlier systems such as the Tartar Guided Missile Fire Control System.

Key technical attributes included beamwidth and power suited to semi-active missile illumination, integration with directors like the Mk 86 Gun Fire Control System and missile launchers such as Mk 13 missile launcher and Standard Missile family engagement profiles. Interfaces were developed to link with command systems including NTDS and later combat management upgrades from contractors like Litton Industries and Sperry Corporation.

Operational Use and Platforms

The AN/SPG-62 was deployed aboard a diverse set of surface combatants commissioned by navies including the United States Navy, Royal Netherlands Navy, and Japanese Maritime Self-Defense Force. Platforms using the radar encompassed cruisers of classes like Ticonderoga-class cruiser and destroyers such as Charles F. Adams-class destroyer and Kidd-class destroyer. It also appeared on frigates and aircraft carriers refitted with missile systems, supporting air defense tasks during operations involving fleets at locations like Gulf of Tonkin and formations operating from bases including Naval Station Pearl Harbor.

Operational doctrine tied the radar to layered air-defense schemes similar to concepts used in programs like NATO integrated air defense and during multinational exercises such as RIMPAC. Crews trained under curricula from institutions like Naval War College and used test ranges including Pacific Missile Range Facility to validate tracking and illumination against aerial threats such as aircraft types employed by adversaries in engagements like Operation Praying Mantis.

Variants and Upgrades

Over time, variants and incremental upgrades were produced to enhance reliability, signal processing, and electronic counter-countermeasures (ECCM). Upgrade initiatives involved contractors including Raytheon, Northrop Grumman, and BAE Systems for modernization programs akin to the refreshes undertaken for systems like Phalanx CIWS and Sea Sparrow. Enhancements added digital processing, improved cooling systems influenced by designs from United Technologies Corporation, and compatibility with modern missiles such as later iterations of the SM-2 and surrogate guidance links used in testbeds at facilities like Wallops Flight Facility.

Retrofit packages were applied during refits and overhauls at shipyards such as Newport News Shipbuilding and Boston Naval Shipyard, often coordinated with fleet modernization efforts led by Office of Naval Research initiatives and strategic plans from Chief of Naval Operations.

Combat Performance and Incidents

The AN/SPG-62 performed as the primary illumination radar in semi-active engagements and was involved in real-world incidents and exercises where fire-control fidelity was critical. Records from encounters during the Iran–Iraq War period, confrontations in the Persian Gulf and engagements tied to escort missions during operations like Operation Earnest Will illustrate roles where illumination radars supported missile engagements and surface gunnery. Investigations into failures and friendly-fire incidents led to procedural changes influenced by reports from boards such as the Holloway Board-era successors and inquiries conducted by entities like the Government Accountability Office.

Performance assessments compared the system to contemporaries such as the AN/SPG-51 and later passive systems integrated with the Aegis Combat System, prompting shifts toward multi-function phased array radars exemplified by the AN/SPY-1 family.

Operators and Deployment History

Primary operator was the United States Navy with secondary operators including allied navies such as the Royal Australian Navy, Japan Maritime Self-Defense Force, Royal Netherlands Navy, and others through Foreign Military Sales coordinated by the Defense Security Cooperation Agency. Deployment history spans Cold War forward deployments with fleets in the Mediterranean Sea under United States Sixth Fleet and the Western Pacific under United States Seventh Fleet, as well as peacetime patrols, exercises like NATO Exercise Northern Wedding and conflict-era tasking during episodes such as Gulf War-era operations. Decommissioning and replacement programs saw units retired or refitted as platforms transitioned to newer systems supported by commands including Naval Sea Systems Command and funded through budgets overseen by United States Congress.

Category:Naval radars