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How Cruise Missiles Would Beat Gps Jammers in Libya

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A 1-kilowatt jammer can block a military GPS receiver from as far away as 80 kilometers (50 miles). A Russian company recently marketed a 4-[kilo]watt jammer that can deny a standard GPS signal within up to 200 kilometers (125 miles).

Now that jammers are cheap and potentially ubiquitous, how do Tomahawk missiles stay on course?

From Technology Review
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