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| EPLRS | |
|---|---|
| Name | EPLRS |
| Origin | United States |
| Service | United States Army (major) |
| Used by | United States Armed Forces, Republic of Korea Armed Forces, Turkish Land Forces |
| Manufacturer | Rockwell Collins, Raytheon Technologies, Harris Corporation |
| Production date | 1980s–1990s |
EPLRS
EPLRS is a tactical packet radio network and position-location reporting system used for command, control, communications, computers, and intelligence in United States Army formations. It provides digital data links for Brigade Combat Team-level and lower echelons, enabling situational awareness, force tracking, and data exchange between platforms such as M1 Abrams, M2 Bradley, and artillery units like the M109 Paladin. Designed during Cold War force modernization, it remains a foundational element in combined arms operations and joint exercises involving partners such as United Kingdom Armed Forces and Republic of Korea Armed Forces.
EPLRS implements a mobile ad hoc network with frequency-hopping, secure digital links to support maneuver, fire support, and sustainment functions across a battlefield defined by corps and division boundaries. It interoperates with systems aboard vehicles including the HMMWV, Stryker, and armored engineering vehicles, and integrates with command posts such as the Tactical Operations Center and brigade-level Combat Information Center. The system supports position data for platforms, enabling commanders to coordinate with aviation assets like the AH-64 Apache and fixed-wing close air support such as the A-10 Thunderbolt II.
Development began in the late 1970s and 1980s to replace legacy line-of-sight and voice-centric links inherited from programs influenced by Cold War requirements and doctrines promulgated after conflicts like the Yom Kippur War. Early contractors included Rockwell Collins and later upgrades involved Raytheon Technologies and Harris Corporation under modernization efforts tied to programs such as the Force XXI transformation and network-centric initiatives influenced by work at DARPA and the U.S. Army Communications-Electronics Command. Fielding accelerated in the 1990s and the system saw operational use in theaters including Operation Desert Storm, Operation Iraqi Freedom, and Operation Enduring Freedom.
EPLRS comprises vehicular radio terminals, fixed and mobile relay nodes, network control elements, cryptographic devices, and position-reporting subsystems. Core hardware mounts on platforms like the M1 Abrams and integrates with battle management systems such as the Blue Force Tracking family and vehicle intercom systems. Frequency management and anti-jamming use techniques aligned with standards from organizations like NATO and cryptographic modules certified to National Security Agency requirements. Network architecture follows a routed, packet-switched model enabling multicast and broadcast for command posts, fire support coordination centers, and logistics nodes tied to Distribution Management Centers.
EPLRS provides real-time friendly force tracking, digital messaging for orders and reports, fire control data distribution, and automated logistics status reporting. It enables the dissemination of tactical graphics to units, supports artillery fire missions coordinated with systems such as the Advanced Field Artillery Tactical Data System, and provides position and status feeds to aerial reconnaissance assets including the RQ-7 Shadow. Operations exploit time-division and frequency-hopping waveforms to resist electronic warfare threats characterized in analyses by institutions like RAND Corporation and doctrines from U.S. Army Training and Doctrine Command.
Units that have employed EPLRS include Armored Brigade Combat Teams, Infantry Brigade Combat Teams, Field Artillery Brigades, and engineer formations during exercises like REFORGER-era successors and multinational events such as RIMPAC and Bright Star. National guard units and allied contingents from countries including Turkey, Republic of Korea, and NATO partners have fielded EPLRS variants or compatible radios during interoperability training in locations such as Fort Bragg, Fort Hood, and Camp Humphreys.
Interfacing with systems like Tactical Internet, Blue Force Tracking, and higher-echelon stovepipes required gateways and protocol translators developed in collaboration with agencies including U.S. Army Materiel Command and contractors who implemented standards from Institute of Electrical and Electronics Engineers for packet radio. Integration efforts addressed coalition operations with models from Combined Joint Task Force command relationships and liaison frameworks used in exercises led by United States European Command and United States Indo-Pacific Command.
Critiques of EPLRS have highlighted spectral efficiency limits, bandwidth constraints for modern data loads, and challenges in scaling to contemporary network demands posed by unmanned systems and high-definition sensor feeds. Analysis by public and policy institutions such as Congressional Research Service and think tanks like the Center for Strategic and International Studies pointed to life-cycle sustainment costs, upgrade complexity, and the need for migration to next-generation tactical networks exemplified by programs under Project Convergence and the Joint All-Domain Command and Control initiative. Operational limitations include line-of-sight propagation issues in complex terrain such as Afghanistan mountain valleys and urban environments like Baghdad.
Category:Military radio systems