GPS based time determining system and method

  • US 5,724,316 A
  • Filed: 09/26/1995
  • Issued: 03/03/1998
  • Est. Priority Date: 09/26/1995
  • Status: Expired due to Term
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First Claim
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1. A method of providing current updated time of day, said method comprising the steps of:

  • receiving GPS radio wave signals;

    determining a current position from said GPS radio wave signals;

    determining a reference time of day from said GPS radio wave signals;

    providing a clock for providing a measured time;

    determining a direction of travel;

    determining a speed of travel;

    determining an approximate current position as a function of the determined direction and speed of travel when GPS radio waves are unavailable;

    determining the current time of day as a function of the approximate current position; and

    displaying the determined current time of day.

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