Editing Dead reckoning (section)

==={{anchor|ADR}}Automotive===
{{Unreferenced|section|date=May 2025}}
Dead reckoning is today implemented in some{{Weasel inline|date=May 2025}} high-end{{Unspecific}} [[automotive navigation system]]s in order to overcome the limitations of GPS/[[GNSS]] technology alone. Satellite microwave signals are unavailable in [[parking garage]]s and tunnels, and often severely degraded in [[urban canyon]]s and near trees due to blocked lines of sight to the satellites or [[multipath propagation]]. In a dead-reckoning navigation system, the car is equipped with sensors that know the wheel circumference and record wheel rotations and steering direction. These sensors are often already present in cars for other purposes ([[anti-lock braking system]], [[electronic stability control]]) and can be read by the navigation system from the [[controller-area network]] bus. The navigation system then uses a [[Kalman filter]] to integrate the always-available sensor data with the accurate but occasionally unavailable position information from the satellite data into a combined position fix.