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Onboard system in a vehicle and central system for locating the vehicle accurately

  • US 6,735,521 B1
  • Filed: 03/30/2000
  • Issued: 05/11/2004
  • Est. Priority Date: 03/31/1999
  • Status: Expired due to Term
First Claim
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1. An onboard system in a vehicle responsive to positioning signals and a time label signal received from a first satellite network for locating said vehicle accurately while said vehicle is moving, said system comprising:

  • a position determining system for continuously determining a current position of said vehicle from said positioning signals, and for providing a current vehicle position signal;

    a processor for continuously sampling the current vehicle position and said time label at short time intervals and for calculating a speed vector;

    a transmitter for periodically transmitting to a control center said current position and time label, said speed vector, and identity of said vehicle, wherein said control center can accurately determine an effective new location of at least one moving vehicle provided with said onboard system as a function of said current position, speed vector, time label and identity transmitted by said transmitter.

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