http://www.engadget.com/2006/12/05/sarnoff-researchers-tout-gps-fail-safe-system/ Engadget Comments for Sarnoff researchers tout GPS fail-safe system http://www.engadget.com/media/feedlogo.gif http://www.engadget.com en-us Copyright 2012 Weblogs, Inc. The contents of this feed are available for non-commercial use only. Blogsmith http://www.blogsmith.com/http://www.engadget.com/2006/12/05/sarnoff-researchers-tout-gps-fail-safe-system/http://www.engadget.com/2006/12/05/sarnoff-researchers-tout-gps-fail-safe-system/Dec 5th 2006 6:47PMhttp://www.engadget.com/2006/12/05/sarnoff-researchers-tout-gps-fail-safe-system/http://www.engadget.com/2006/12/05/sarnoff-researchers-tout-gps-fail-safe-system/Dec 5th 2006 7:37PMhttp://www.engadget.com/2006/12/05/sarnoff-researchers-tout-gps-fail-safe-system/http://www.engadget.com/2006/12/05/sarnoff-researchers-tout-gps-fail-safe-system/Dec 5th 2006 7:43PMhttp://www.engadget.com/2006/12/05/sarnoff-researchers-tout-gps-fail-safe-system/http://www.engadget.com/2006/12/05/sarnoff-researchers-tout-gps-fail-safe-system/Portability?]]>Dec 5th 2006 8:09PMhttp://www.engadget.com/2006/12/05/sarnoff-researchers-tout-gps-fail-safe-system/http://www.engadget.com/2006/12/05/sarnoff-researchers-tout-gps-fail-safe-system/
One of the methods used way back in the days before gps and before land based radio telemetry systems.... commercial aircraft used a gyroscope system to navigate. I believe i read it had to be set to the airport's lad/lon everytime the plane left and after a thousand mile round trip on return to the airport it would only be off by 50 feet or so. I would be suprised if there wasn't an equivalent modern technology that could be used with electronic accelerometers (similar to how those suunto / nike / polar running pedometers work with the shoe mounted accelerometer).

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Very interesting idea, Wouter.
Although several suspects come to mind such as resolution, computational power requirement, cost, and detection of angular velocity, I guess there should be ways to overcome these issues. Perhaps it IS the way to go...]]>Dec 6th 2006 3:46AM