Portable unit kicks in when GPS fades
(Credit: Seer Technology)Ahoy, GPS-stranded motorist. Stop banging the dashboard, and consider this timely reincarnation of dead reckoning to help you find your way out of “GPS-denied environments,” or at least alert others to where you can be found.
Seer Technology is offering a miniature, self-contained, electronic navigation unit called NaviSeer that mixes GPS and DR in a complex gumbo of hardware and proprietary algorithms to deliver user location in real time.
It does this by blending the output from three gyros, three accelerometers (one at each axis,) a magnetometer, and a baro altimeter, and then running it through a Kalman filter.
The result: coordinates accurate to within less than a yard, according to Seer. And no, it “does not require sensors to be worn on the legs or feet.”
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Originally posted at Military Tech
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