The present invention discloses an improved vehicular inertial guidance navigation system, a.k.a. a dead reckoning system for navigation of a vehicle. The inertial guidance navigation system which may be used alone or in combination with other position determination means, such as GPS and map databases,...http://www.google.com/patents/US6282496?utm_source=gb-gplus-sharePatent US6282496 - Method and apparatus for inertial guidance for an automobile navigation system
