Patent ID: 8032300
Filing Date: 2011-10-04
Classification: G01C,G01S

Abstract:
1. A position determining system comprising a position determining component for receiving satellite based positional information, a memory for storing geographic information, a comparator for comparing information from the position determining component to geographic information from the memory, a receiver for receiving correction data, correction means for improving the accuracy of the satellite based positional information using the correction data, a data I/O, and a controller for controlling the functionality of the position determining component or controlling the data flow to the data I/O or controlling subsequent processing of the satellite based positional information, or including an offset distance into subsequent processing of the satellite based positional information, depending on the output of the comparator, and wherein the controller controls the receiver or the correction means to prevent the calculation of enhanced positional information from the correction data or prevents such enhanced positional information from being made available to the data I/O.