Differential GPS for fleet base stations with vector processing mechanization
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United States of America Patent
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Jun 10, 1997
Grant Date -
N/A
app pub date -
May 4, 1995
filing date -
May 4, 1995
priority date (Note) -
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Abstract
A fleet management system for a base station to obtain differential GPS corrections to the location information for the fleet vehicles. A fleet vehicle first sends the information of 'position solution' back to the base station with time annotation, where the position solution only needs to specify position, velocity and the satellites observed. The base station, which already has an a priori fixed position vector for its location, generates a potential solution set for all the possibly observable satellites. This allows the base station to vector-process to determine the differential correction for each combinatorial set of satellites observed by the fleet vehicle. This way, equivalent differential GPS accuracy of 10 meters or better can be achieved for the fleet management system without imposing the communications burden to the system.
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