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Thomas Michael King, George Jeffrey Geier, Rodney Patrick Landers, Michael Joseph Slade, Paul DeClerck: Time determination in satellite positioning system receivers and methods therefor. Motorola, Ronald K Bowler II, September 13, 2005: US06944540 (137 worldwide citation)

Method in a Global Positioning System (GPS) receivers, including determining pseudorange (PNR) measurements for at least four satellites (210), determining a coarse time (220) corresponding to the pseudorange measurement, determining an offset time (240) between a periodic GPS event of one of the fo ...


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George Jeffrey Geier: Portable dead reckoning system for extending GPS coverage. Motorola, Bradley J Botsch, John J King, July 18, 2000: US06091359 (55 worldwide citation)

This invention extends GPS coverage in an automotive environment without requiring direct interfaces to the vehicle's sensors in a unique and cost effective way. Since it removes all required vehicle interfaces (except power), it produces a virtually portable navigation system with no installation r ...


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George Jeffrey Geier, Roger Charles Hart, Thomas Michael King: Method and apparatus for accurately determining the position of satellites in geosynchronous orbits. General Dynamics Decision Systems, Jenner & Block, March 18, 2003: US06535801 (40 worldwide citation)

A method of determining the position of a satellite in a near geosynchronous orbit includes receiving at least one main lobe signal from an antenna on a first GPS satellite. A GPS signal, including GPS time and Doppler, is received from a pseudolite positioned on the Earth and an approximate positio ...


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George Jeffrey Geier, Chu Gen Wang: Method and apparatus for generating an indication of loss of positioning integrity in emergency call systems. Motorola, Bradley J Botsch, Nicholas C Hopman, John J King, November 21, 2000: US06151551 (34 worldwide citation)

The present invention provides an assessment, in real-time, of the integrity of the positioning solution and navigation sensors used to support an Emergency Calling System (ECS) that integrates positioning and cellular phone technology. This integrity information is used, via a warning light display ...


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Thomas Michael King, George Jeffrey Geier, Troy L Strother: Data message bit synchronization and local time correction methods and architectures. Motorola, Roland K Bowler II, March 11, 2003: US06532251 (30 worldwide citation)

Methods and architectures for data message bit synchronization of a spread spectrum signal having a repeating sequence of pseudorandom code bits modulated with data message bits having a data bit time that is an integer number of a repeat time of the pseudorandom code bits. In one embodiment, an adj ...


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George Jeffrey Geier: Method and apparatus for differential scale factor calibration in differential odometry systems integrated with GPS. Motorola, Bradley J Botsch, Michael L Smith, John J King, May 8, 2001: US06230100 (25 worldwide citation)

Calibration of a differential scale factor associated with left and right wheels of a vehicle having a terrestrial navigation system. The terrestrial navigation system includes a GPS receiver integrated with a dead reckoning system. The dead reckoning system has wheel sensors coupled to the left and ...


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George Jeffrey Geier, Roger Charles Hart, Gaylin David Brenchley: Method and apparatus for maintaining the integrity of spacecraft based time and position using GPS. Motorola, Frank J Bogacz, October 17, 2000: US06134484 (21 worldwide citation)

A method and apparatus for maintaining the integrity of spacecraft based time and position using GPS (11) is disclosed. A GPS receiver is provided with a Receiver Autonomous Integrity Monitor (RAIM) processor (12) and a Kalman filter (14). GPS signals are received from at least four GPS satellites a ...


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George Jeffrey Geier: Recognition of and method and apparatus for GPS antenna lever arm compensation in integrated GPS/dead reckoning navigation systems. Motorola, Bradley J Botsch Sr, July 21, 1998: US05784029 (19 worldwide citation)

This invention reduces the error growth associated with vehicle Dead Reckoning (DR) systems utilizing heading rate sensors (15) by compensating for the lever arm or offset between the Global Positioning System (GPS) antenna (11) and the center of rotation of the vehicle. When turning at moderate spe ...


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Thomas Michael King, George Jeffrey Geier, Troy L Strother: Data message bit synchronization and local time correction methods and architectures. Motorola, Roland K Bowler II, August 23, 2005: US06934322 (16 worldwide citation)

Methods and architectures for data message bit synchronization of a spread spectrum signal having a repeating sequence of pseudorandom code bits modulated with data message bits having a data bit time that is an integer number of a repeat time of the pseudorandom code bits. In one embodiment, an adj ...