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Darpa

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https://www.space.com, By Elizabeth Howell

The XS-1 is a space plane under development by the U.S. military's high-tech agency, the Defense Advanced Research Projects Agency (DARPA).

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http://www.nextbigfuture.com

Unlike conventional radios, which are designed to work with specific waveforms (AM and FM, cellular, digital TV, and WiFi, for example), software defined radios can send and receive many different waveforms, and toggle between them on the fly by mean

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