The Business and Technology of Global Positioning, Navigation, and Timing.

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Read the Digital Issue: GPS World, April 2009

THE SYSTEM 10
Big Four Race Called from Munich; DAGR Extended; Jamming Trial Confirms Vulnerabilities; Briefly Noted
THE BUSINESS 14
Security Paramount, Strengthened by Location; Broadcom, SiRF Top ABI’s GPS Chip Vendor Ranking; ITT Awards Symmetricom Timing Contract for GPS III; more

BUSINESS OUTLOOK 27
How the Stimulus Plan Benefits Our Industry
How will the American Recovery and Reinvestment Act of 2009 affect our industry?
By Stephen Colwell

SBAS Interference 37
Worst-Case Scenario
Some applications using data collected by fixed- or low-dynamic WAAS or other SBAS receivers may encounter a tracking error due to C/A code cross-correlation.
By L. Lestarquit, J-L. Issler, O. Nouvel, M. Sihrener, G. Lamontagne, J.C. Guay, R. Landry, O. Julien, C. Macabiau, and M. Nouvel-Malicorne

Precise Point Positioning 43
A Powerful Technique with a Promising Future
Is there a viable alternative to real-time kinematic (RTK) positioning? In this month’s column, we take a look at the technique of precise point positioning (PPP). How close is PPP to prime time?
By Sunil Bisnath and Yang Gao

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This is GPS World. But the magazine has never limited itself to coverage of the U.S. Global Positioning System. We have also chronicled the development of GLONASS and Galileo; of WAAS and LAAS and NDGPS and EGNOS and private correction services; of MSAS, and QZSS, and Beidou, and GAGAN, and GRAS.

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