Patent ID: 7479922
Filing Date: 2009-01-20
Classification: G01S

Abstract:
1. A system for accurately determining a location of a vehicle, the system comprising: a first location determining receiver for determining a first location estimate of a vehicle, the first location estimate based on a first location determining receiver associated with satellite beacons; a second location determining receiver for determining a second location estimate of a vehicle, the second location estimate based on a second location determining receiver exclusiveiy associated with terrestrial beacons; a selector for selecting initially the first location estimate, associated with the satellite beacons, as a preferential location in accordance with an initialization scheme for the vehicle in a work area; a filtering module for applying a first weight to the first location estimate and a second weight to the second location estimate to derive a weighted estimate as the preferential location upon satisfactory completion of the initialization scheme; a focused acquisition manager associated with at least one of the first location determining receiver and the second location determining receiver for limiting a tracking loop of location measurement data; and a feedback manager for providing measurement predictions and variances from the filtering module to the focused acquisition manager.