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  • Over the Horizon Backscatter Radar: East and West

    The AN/FPS-118 Over-the-Horizon Backscatter Radar System (OTH-B) was developed in the 1970s and 1980s to provide all-altitude, long-range surveillance of aerial approaches to the United States. OTH-B radar systems use the ionosphere to refract outgoing radar waves and return signals, enabling the system to detect and track targets that would
  • OC-135B Open Skies

    Mission The United States of America Open Skies OC-135B Observation Aircraft supports the Open Skies Treaty. The aircraft flies unarmed observation flights over participating parties of the treaty. Features The aircraft is a modified WC-135B. The OC-135B modifications center around four cameras installed in the rear of the aircraft. Since its
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