AN/TPQ‑37

AN/TPQ‑37
Name	AN/TPQ‑37
Origin	United States
Type	Counter-battery radar
Manufacturer	Northrop Grumman

AN/TPQ‑37 is a ground‑based counter‑battery radar system developed for detection and location of incoming artillery, mortar, and rocket fire. Designed to provide timely targeting information to United States Army and allied forces such as British Army, Israel Defense Forces, and Indian Army, it integrates surveillance, detection, and fire‑control support. The system has been employed in multiple conflicts including operations in Iraq War (2003–2011), War in Afghanistan (2001–2021), and regional confrontations like the Yom Kippur War‑era doctrinal evolutions.

Design and specifications

The AN/TPQ‑37 was produced by Northrop Grumman and originally developed from concepts advanced by contractors associated with Texas Instruments and General Dynamics. The radar uses a rotating phased array antenna and employs Doppler processing techniques similar to systems such as AN/TPQ‑36 and derivatives from AN/MPQ families. Its operational frequency bands and pulse‑Doppler modes enable detection of projectiles over ranges comparable to contemporary radars fielded by Raytheon Technologies and Lockheed Martin. Mounted on trailers compatible with transport platforms like the M939 5-ton truck and logistic chains utilized by United States Marine Corps, the radar features automated emplacement, azimuth stabilization, and IFF‑compatible electronics influenced by design practices from North American Aviation era avionics. Specifications include multi‑target track capability, rapid target acquisition time used in doctrines developed by US Army Training and Doctrine Command and system maintenance cycles aligned with standards from Defense Logistics Agency.

Operational history

First fielded in the late 20th century, the radar was adopted by units within United States Army artillery brigades and later exported to partner militaries including Egyptian Army, Jordan Armed Forces, and Philippine Army. It saw sustained deployment during Operation Iraqi Freedom, supporting counter‑battery missions alongside assets such as the M109 Paladin and the M777 howitzer. In Operation Enduring Freedom, it contributed to base defense arrangements and force protection plans coordinated with units from NATO member states like United Kingdom and Canada. Instances of use in hybrid conflicts implicated forces from Ukraine and the Syrian Arab Republic where comparable systems influenced tactical outcomes in engagements resembling actions during the Donbas conflict.

Deployment and users

Primary users include United States Army and export customers such as Israel Defense Forces, Indian Army, Turkish Land Forces, Royal Thai Army, United Arab Emirates Armed Forces, and several NATO and non‑NATO partners. Deployments are typically at brigade or division level within artillery, fire support, and surveillance units, integrated with command networks from organizations like CENTCOM and NATO Allied Land Command. The radar’s logistical footprint aligns with sustainment practices from Defense Contract Management Agency and interoperability protocols set by International Committee of the Red Cross‑informed rules of engagement in some theaters.

Tactics and employment

Tactically, the radar provides rapid time‑of‑flight calculations and impact point extrapolations enabling counter‑battery responses by platforms such as M270 MLRS and BM-21 Grad equivalents. Employment doctrine draws on procedures used by 1st Cavalry Division and artillery schools like United States Army Field Artillery School at Fort Sill for integrated counter‑fire, base protection, and registration missions. In combined arms operations it coordinates with reconnaissance units from 7th Cavalry Regiment and air assets including AH-64 Apache for terminal effects. Techniques include sensor network fusion with electro‑optical systems from Raytheon and data links compliant with standards from Joint Chiefs of Staff directives.

Variants and upgrades

Upgrades over time have introduced digital signal processors, enhanced user interfaces, and networking features akin to those in systems modernized by BAE Systems and Thales Group. Fielded variants emphasized mobility, reduced deployment time, and improved clutter rejection comparable to improvements in AN/TPQ‑53 programs. Modernization efforts by contractors such as Northrop Grumman and subcontractors with histories at Honeywell and Analog Devices added features for integration with battle management systems used by US Army Futures Command and NATO’s Alliance Ground Surveillance concepts.

Countermeasures and vulnerabilities

Countermeasures exploited by adversaries include obscurant tactics observed in actions attributed to irregular forces in Iraq and Afghanistan, use of salvo firing to mask point of origin as seen in engagements during the Yom Kippur War study analyses, and electronic attack techniques analogous to jamming employed against radars in conflicts involving Russian Armed Forces. Vulnerabilities include detection by signals‑intelligence platforms of agencies like National Security Agency and exposure when fixed in forward positions analogous to lessons learned by Iraqi Armed Forces and Syrian Arab Army units. Mitigation strategies parallel electronic protection measures fielded in systems used by NATO forces and incorporate mobility doctrine from USMC expeditionary practices.

Related systems and successors

Contemporary and successor systems include the AN/TPQ‑36, AN/TPQ‑48, and next‑generation radars such as the AN/TPQ‑53 and export variants produced by firms like Thales Group and Elbit Systems. Comparable international systems include radars fielded by KONGSBERG and platforms integrated with SIPRI‑documented force structures. Integration pathways mirror those of command and control projects overseen by NATO Allied Command Transformation and doctrinal evolutions promoted by US Army Training and Doctrine Command.

Category:Radar equipment