Navigation system using GPS data
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United States of America Patent
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Sep 7, 1999
Grant Date -
N/A
app pub date -
Nov 8, 1996
filing date -
Nov 8, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
A system for tracking an object (for example tracking an automobile as it moves over streets) using an electronic map and a GPS receiver. The GPS receiver accepts data from a number of satellites and determines a GPS derived position and velocity. Based on the previous position of the object, the GPS derived position, the velocity, the DOP and the continuity of satellites for which data is received, the system determines whether the GPS data is reliable. If the GPS data is reliable, the previous position of the object is updated to the GPS derived position. The updated position is then matched to a map of roads.
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