Why GPS Fails In Cities. And What Researchers Think Could Fix It

ScienceDaily reports:Our everyday GPS struggles in "urban canyons," where skyscrapers bounce satellite signals, confusing even advanced navigation systems. Norwegian University of Science and Technology (NTNU) scientists created SmartNav, combining satellite corrections, wave analysis, and Google's 3D building data for remarkable precision. Their method achieved accuracy within 10 centimeters during testing [90% of the time]. The breakthrough could make reliable urban navigation accessible and affordable worldwide... "Cities are brutal for satellite navigation," explained Ardeshir Mohamadi. Mohamadi, a doctoral fellow at NTNU, is researching how to make affordable GPS receivers (like those found in smartphones and fitness watches) much more precise without depending on expensive external correction services.

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