Abstract: A vehicle positioning system architecture according to the invention employs a satellite radio system (“SRS”) to deliver global positioning system (“GPS”) correction data to vehicles. A vehicle having a compatible onboard positioning system receives standard GPS data from GPS satellites, along with SRS signals from SRS satellites and/or SRS terrestrial repeaters. The onboard vehicle positioning system corrects the GPS data with GPS correction data received via the SRS signals.

Abstract: The present invention provides a method of operating a telematics device within a mobile vehicle communication system to provide a current telematics device geographic location. The method includes receiving odometer information including velocity information for a specified time period, and receiving positional information including velocity information for a specified time period. The method further includes determining a first distance traveled value based on the received odometer information and determining a second distance traveled value based on the received positional information. The method additionally includes selecting one of the first and second distance traveled values as a primary distance traveled value based on predetermined criteria, and determining a current telematics device geographic location based on the primary distance traveled value. The odometer information may include velocity information from a power-train sensor.