Differential GPS for fleet base stations with vector processing

Details Differential GPS for fleet base stations with vector processing Differential GPS for fleet base stations with vector processing

1995-05-04

1997-06-10

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

342457, G01S 502

Patent

active

056380771

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.

REFERENCES:
patent: 5495257 (1996-02-01), Loomis

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