Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment
Patent
1997-04-11
1999-12-07
Zanelli, Michael J.
Data processing: vehicles, navigation, and relative location
Navigation
Employing position determining equipment
701215, 34235703, 702 5, G01S 502, G01C 2100
Patent
active
059998784
ABSTRACT:
A system and method for acquiring differentially corrected GPS data for forming a digital database of road geometry in a geographic region. A vehicle having a GPS receiver and a DGPS demodulator located therein is driven on roadways in the geographic region. The GPS receiver receives standard GPS signals and the DGPS demodulator receives DGPS signals which are used to correct the standard GPS signals. The corrected GPS signals are stored where they can be processed to create a digital database. Alternately a GPS receiver is positioned at a stationary location along with a portable DGPS demodulator. A vehicle having a GPS receiver located therein is driven on roadways in the geographic region. The GPS receiver at the stationary location is continuously operated and the DGPS demodulator is operated once to receive a DGPS signal. The DGPS demodulator can then be moved to another geographic region. The GPS receiver in the vehicle is operated as the vehicle is being driven and the GPS receiver receives standard GPS signals. The standard GPS signals from the GPS receiver at the stationary location can be used to correct the standard GPS signals received by the GPS receiver in the vehicle.
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Hanson John L.
Shotz Robert H.
Kaplan Lawrence M.
Kozak Frank J.
Navigation Technologies Corp.
Zanelli Michael J.
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