GPS-guided artillery
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| GPS-guided artillery | |
|---|---|
| Name | GPS-guided artillery |
| Origin | Multinational |
| Type | Guided munition |
| Service | 1990s–present |
| Used by | United States Armed Forces, British Armed Forces, Armed Forces of Ukraine, French Armed Forces, Islamic Republic of Iran Army, People's Liberation Army (China), Russian Armed Forces |
| Designer | Multiple contractors |
| Manufacturer | Lockheed Martin, BAE Systems, Raytheon Technologies, Rheinmetall, Nexter Systems, General Dynamics, Northrop Grumman, MBDA |
| Weight | Varies |
| Calibre | 120 mm–155 mm commonly |
| Filling | High explosive, submunitions, base bleed |
| Guidance | Global Positioning System-based inertial navigation |
| Launch platform | Towed artillery, self-propelled guns, naval guns, rocket artillery |
GPS-guided artillery is a class of precision munitions that use satellite navigation and onboard guidance to correct flight and strike selected coordinates. Developed to increase lethality against point targets while reducing collateral damage, these systems integrate technologies from satellite navigation programs, aerospace contractors, and ordnance manufacturers. Their adoption influenced doctrine in conflicts including the Gulf War, War in Afghanistan (2001–2021), Iraq War, and the Russo-Ukrainian War.
History and development
Early work on coordinate-guided munitions traces to programs funded by the Defense Advanced Research Projects Agency and procurement initiatives within the United States Department of Defense, leading to iterations such as the Excalibur (artillery shell) program. The success of satellite navigation services provided by the Global Positioning System accelerated development in the 1990s, alongside influences from the Strategic Defense Initiative ecosystem and technologies commercialized by firms like Hughes Aircraft and Raytheon Technologies. European counterparts—driven by organizations such as the European Defence Agency and national procurement offices in France, Germany, and the United Kingdom—produced competing guided rounds and helped standardize interfaces for platforms like the G6 howitzer and the M777 howitzer. Conflicts including the Kosovo War and the Iraq War validated demand, prompting production by companies including Lockheed Martin and BAE Systems. Export controls, influenced by treaties and export regimes such as the Wassenaar Arrangement, shaped proliferation to states like Israel, India, and Turkey.
Guidance and navigation systems
GPS-guided artillery rounds typically combine a receiver for the Global Positioning System with an inertial navigation system derived from aerospace projects at firms like Honeywell Aerospace and Thales Group. Enhanced variants fuse signals from GLONASS and Galileo constellations managed by Russian Aerospace Forces and the European Union respectively, and sometimes employ receivers compatible with BeiDou from China. Onboard processors running software architectures influenced by contractors such as Northrop Grumman provide waypoint updating, flight-control algorithms, and autopilot commands sent to movable control surfaces. Mission planning often uses battlefield management systems tied to staff centers at formations like V Corps (United States) or national headquarters in Paris and London, while target coordinates may be sourced from reconnaissance assets including MQ-9 Reaper, RQ-4 Global Hawk, M777 howitzer forward observers, and intelligence centers like the National Geospatial-Intelligence Agency.
Munition types and designs
Design families include base-bleed and rocket-assisted projectiles retrofitted with guidance kits similar to the M712 Copperhead lineage, and purpose-built shells exemplified by the XM982 Excalibur. Common calibres for modern guided artillery are 155 mm used on systems such as the M109 Paladin and 152 mm employed by variants of the 2S19 Msta; smaller guided mortar rounds mirror development trends in systems like the XM395 Precision Guided Mortar Munition. Warhead types range from unitary high explosive to sensor-fuzed submunitions—historically controversial under instruments discussed by the Convention on Certain Conventional Weapons—and modular payloads for specialized missions. Manufacturers such as Rheinmetall and Nexter Systems produce sealed guidance modules and control canards or jet-thrust sections to achieve cross-range corrections and terminal maneuver.
Tactics, employment, and doctrine
Doctrinal use evolved within formations including III Corps (United States), NATO headquarters at Supreme Headquarters Allied Powers Europe, and national armies during campaigns like the Operation Iraqi Freedom advance. GPS-guided rounds enable deep interdiction, counter-battery suppression, and precision strike against hardened points, influencing combined-arms tactics alongside assets such as AH-64 Apache, Panzergrenadier units, and mobile rocket artillery like the BM-30 Smerch. Fire-control networks integrate targeting data from reconnaissance at corps and division levels, and joint operations coordinate strikes with air assets including F-15E Strike Eagle and Tornado IDS. Logistics and ammunition allocation are affected by cost-per-shot analyses compared to unguided barrages and precision munitions such as the AGM-114 Hellfire.
Accuracy, effectiveness, and limitations
Guided shells like the Excalibur (artillery shell) demonstrated circular error probable figures measured in meters, markedly better than conventional rounds fired by systems such as the M198 howitzer. Effectiveness depends on satellite availability, onboard seeker performance, and meteorological data often sourced from agencies including the National Oceanic and Atmospheric Administration for mission planning. Limitations include degraded GPS signals in contested electronic environments, cost considerations compared to massed artillery fires observed in engagements like the Battle of Mosul (2016–17), and reduced utility against moving targets without terminal seekers.
Countermeasures and vulnerabilities
Adversaries employ electronic warfare suites fielded by units associated with formations such as the Russian Ground Forces and proxies in asymmetric campaigns to jam or spoof signals from the Global Positioning System, sometimes leveraging commercial technologies procured through entities in Belarus or Iran. Kinetic and cyber operations against satellite infrastructure administered by the United States Space Force or the Russian Aerospace Forces pose strategic risks. Tactics to defeat precision rounds include dispersion, hardening using facilities influenced by design principles from Kuwait reconstruction efforts, and rapid relocation doctrines practiced by units like the Ukrainian Ground Forces.
Legal, ethical, and strategic implications
Deployment engages international law considerations framed by precedents at institutions such as the International Court of Justice and treaties influenced by debates at the United Nations General Assembly. Ethical discussions involve proportionality doctrines examined by military legal services in capitals like Washington, D.C. and London, and concerns about escalation raised in writings by analysts at think tanks including the RAND Corporation and the International Institute for Strategic Studies. Strategically, proliferation affects deterrence dynamics among states including China, India, Pakistan, and Israel, while arms-control dialogues at forums such as the Conference on Disarmament consider transparency and risk reduction measures.