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22 May 2013
Pakistan adopts Chinese rival GPS satellite system »
13 May 2013
ESA's next Earth Explorer satellite Will Map The Tropics »
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Radio Telescope, GPS Use Ionosphere to Detect Nuclear Tests
U.S. Naval Research Laboratory radio astronomer, Joseph Helmboldt, Ph.D., and researchers at Ohio State University Department of Civil, Environmental, and Geodetic Engineering analyzed radio telescope interferometry and Global Positioning Satellite (GPS) data recorded of the ionosphere during one of the last underground nuclear explosions (UNEs) in the U.S., codenamed Hunters Trophy.
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