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US Patent 7554487 - Method and system for determining time in a satellite positioning system

US Patent Issued on June 30, 2009
Estimated Patent Expiration Date: Icon_subject March 26, 2027Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
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Abstract

Method and apparatus for receiving an estimate of time in a satellite signal receiver receives an estimate of time from a server and compensates for error of a clock in the satellite signal receiver using the estimate of time. The output of the compensated clock is used when computing a position of the satellite signal receiver. The estimate of time is received using a network time protocol (NTP), a simple network time protocol (SNTP), or by one-way broadcast from the server.

Other References

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Inventors

Assignee

Application

No. 11728391 filed on 03/26/2007

US Classes:

342/357.02With accuracy enhancing

Examiners

Primary: Issing, Gregory C

Attorney, Agent or Firm

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Foreign Patent References

  • 1167993 EP 01/01/2002
  • WO 99/53338 WO 10/01/1999
  • WO-99/53338 WO 10/01/1999
  • WO 00/10028 WO 02/01/2000
  • WO-00/10028 WO 02/01/2000
  • WO-00/58750 WO 10/01/2000
  • WO 00/58750 WO 10/01/2000
  • WO-01/39698 WO 06/01/2001
  • WO 01/73467 WO 10/01/2001
  • WO-01/73467 WO 10/01/2001
  • WO 03/010912 WO 02/01/2003

International Class

G01S 5/14

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