Why GPS Doesnt Work

In the post 9/11 world, security is clashing with utility and aviation is on the front lines, with consistent and reliable GPS signals at the center of the conflict.

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Dark clouds are looming on the horizon of our otherwise exciting GPS future. With increasing frequency, the military is jamming or spoofing GPS over huge swaths of airspace. A typical GPS NOTAM for Albuquerque center covers a radius of 237 NM at 10,000 feet, 207 NM at 400 feet and 165 NM at 50 feet daily for most of a week. Pilots in the Southwest have become accustomed to these NOTAMs, but theyre becoming more frequent and expanding to other areas of the country.
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