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History of innovation November 17, 2021 Computing, Military, Radar, Safety, Security and Defense, Seminal Innovations, The 1970s, Transportation

Over-the-horizon radar

Over-the-horizon radar
SRI’s Wide-Aperture Radar Facility (WARF) , circa 1970s.

For the U.S. military, SRI pioneered technology to detect objects located thousands of miles beyond the horizon or conventional line of sight. SRI’s Wide-Aperture Radar Facility (WARF) in California was used for decades of over-the-horizon (OTH) research in aircraft, land vehicle, and missile detection; airfield surveillance; ship tracking; terrain mapping; advanced display and signal processing techniques; and remote ocean wave-height measurements.

The WARF design was used to develop the specification for the U.S. Navy’s Relocatable Over-the-Horizon Radar (ROTHR) in Virginia, the U.S. Air Force’s two installations in Maine and Northern California, and the Australian government’s Jindalee experimental OTH radar.

ComputingMilitaryRadarSafetySecurity and DefenseSeminal InnovationsThe 1970sTransportation

Read our 75th anniversary blog feature

75 years of innovation: Over the horizon radar

SRI 75 Over the horizon radar
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