Odometer assisted GPS navigation method
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United States of America Patent
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Jun 11, 1996
Grant Date -
N/A
app pub date -
Aug 1, 1994
filing date -
Aug 1, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
An odometer assisted global positioning system (GPS) method operates in a vehicle to indicate the position of the vehicle. The vehicle has an odometer, a processor, and a GPS receiver. The method knows the last position of the vehicle and finds a measured Doppler and a measured pseudo range for each satellite of the GPS which is in line of sight with the vehicle. The processor determines the Doppler compensation to the measured Doppler. The processor combines the speed of the vehicle with the Doppler compensation to the measured Doppler in order to produce a new heading of the vehicle. The processor combines the last known position of the vehicle with the new heading and with the Doppler compensation and the measured pseudo range to provide a new position of the vehicle.
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