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GPS World Author

John W. Lavrakas


JOHN W. LAVRAKAS is president of Advanced Research Corporation, where he provides consulting and research and development services on satellite navigation. He is the current president of the Institute of Navigation. Over his 26-year career, he has provided technical support to GPS initiatives such as Integrity Failure Modes and Effects Analysis, Civil Performance Monitoring, and GPS Operations Center. He has also supported development of the GPS Control Segment, GPS user equipment for military range applications, GPS performance analysis capabilities, and GPS-based commercial asset location systems.


Article
Expert Advice - GNSS in the Year 2017   May 1, 2007
By: John W. Lavrakas

Three, perhaps four, Global Navigation Satellite Systems (GNSS) are planned to be fielded in the next 10 years. How likely is it that all these systems will be fielded? What will service really be like in the year 2017? Let me try and look into the future to answer this question.

Article
Expert Advice - Managing the GPS Constellation for Today's Needs   September 1, 2006
By: John W. Lavrakas

For many, GPS is at its best performance ever, with 29 satellites in orbit and user range errors at their lowest levels in years. Yet for others, GPS performance falls short of expectations.

Article
GPS for the Rest of Us   September 1, 2003
By: John W. Lavrakas

The remarkable accuracy and historical reliability of GPS service might lead observers to believe that the civil signals are closely monitored. They aren’t, but they could be. This article tells how.