ALBUQUERQUE, New Mexico, Sept. 22 -- The U.S. Department of Energy Sandia National Laboratories issued the following news release:

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Space-based nuclear detonation detection mission endures

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ALBUQUERQUE, N.M. -- Roughly 12,550 miles above Earth, a constellation of U.S. global positioning satellites orbits the planet. GPS satellites also carry a sophisticated system designed to detect above ground nuclear detonations anytime, anywhere.