AN/URC-117 Ground Wave Emergency Network, Military communication system in California, United States.
The AN/URC-117 Ground Wave Emergency Network consists of relay nodes with longwave transmitting towers reaching heights between 290 and 299 feet tall.
Established in 1992, this network was designed to maintain communication channels during nuclear warfare, particularly surviving electromagnetic pulse effects from high-altitude explosions.
The system represents American military technological advancement in creating resilient communication infrastructure for national defense purposes.
Each relay node operates in the low-frequency band at 150 to 175 kilohertz with broadcasting power ranging from 2,000 to 3,000 watts.
The network sites occupy 11-acre areas, secured by 8-foot-high chain-link fences with barbed wire, containing specialized radio equipment for emergency communications.
Inception: 1992
GPS coordinates: 34.75165,-115.23028
Latest update: March 3, 2025 16:22
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