A first navigation unit of an apparatus in one example comprises a hybrid global positioning system (GPS)/inertial navigation system (INS) component. The hybrid GPS/INS component provides first GPS information and first INS information for the first navigation unit. The first navigation unit is configured to receive second GPS information and second INS information from a second navigation unit. The second navigation unit comprises a GPS component configured to determine a double-differenced GPS carrier phase measurement through employment of the first GPS information and the second GPS information. The first navigation unit comprises a relative Kalman filter configured to update an INS error estimate for an estimate of a relative position between the first and second navigation units based on the double-differenced GPS carrier phase measurement and the first and second INS information.

 
Web www.patentalert.com

< Information storage medium and apparatus for reproducing the same

> System management user interface providing user access to status information for process control system equipment including displayed propagated status in a navigation pane

> Systems and methods for determining best path for avoidance of terrain, obstacles, or protected airspace

~ 00599