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Global navigation satellite system

  • US 7,683,831 B2
  • Filed: 03/15/2007
  • Issued: 03/23/2010
  • Est. Priority Date: 03/15/2006
  • Status: Active Grant
First Claim
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1. A method of communication comprising:

  • providing a location server adapted to communicate with a mobile station, a first satellite, and a second satellite, wherein the first satellite is adapted to operate according to a first specification including a first system time and wherein the second satellite is adapted to operate according to a second specification including a second system time;

    defining at the location server a virtual global navigation satellite system (GNSS) time;

    receiving at the location server a first signal from the first satellite including a first satellite code phase time;

    receiving at the location server a second signal from the second satellite including a second satellite code phase time;

    calculating at the location server a GNSS time offset as a function of the virtual GNSS time, the first satellite code phase time and the second satellite code phase time; and

    communicating the virtual GNSS time to the mobile station.

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