History
In December 1939, the U.S. military established an Aircraft Warning Service (AWS) using radar to defend American territory. It employed the SCR-270 radar, the first United States long-range search radar created at the Signal Corps laboratories at Fort Monmouth, New Jersey, circa 1937. The radar's operating frequency was 106 megacycles, with a maximum range of 150 miles, or greater if the equipment was at an elevated site, and was suitable for detecting aircraft propellers.
Under the command of Col. Wilfred H. Tetley the AWS established six mobile radar detector sets in Hawaii at Kawaiola, Wainae, Kaawa, Kokohead, Schofield Barracks, and Fort Shafter. On Thanksgiving Day in 1941, the Schofield Barracks radar set was moved to the Opana Radar Site, a location 532 feet above sea level with unobstructed view of the Pacific Ocean. The set comprised four trucks carrying the transmitter, modulator, water cooler, receiver, oscilloscope, operator, generator and antenna.
Read more about this topic: Opana Radar Site
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