30 Aug '16, 5pm

Centimeter-Level GPS Positioning For Cars

Superaccurate GPS may soon solve three robocar bugbears: bad weather, blurred lane markings, and over-the-horizon blindspots. These are things that cameras and LIDAR can’t always see through, and radar can’t always see around. A group led by Todd Humphreys, an aerospace engineer at the University of Texas at Austin, has just tested a software-based system that can run on the processors in today’s cars, using data from scattered ground stations, to locate a car to within 10 centimeters (4 inches). That’s good enough to keep you smack in the middle of your lane all the time, even in a blizzard. “When there’s a standard deviation of 10 cm, the probability of slipping into next lane is low enough—meaning 1 part in a million,” he said. Today’s unaided GPS gives meter-plus accuracy, which raises the chances that the car will veer outside of its lane to maybe 1 part in 10, or eve...

Full article: http://spectrum.ieee.org/cars-that-think/transportation/s...

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