The phased transition of the 22-year-old Legacy GPS Master Control Station (MCS) to the Architecture Evolution Plan (AEP) control segment, which became operational in September 2007, constituted a multi-year cooperative effort to achieve a seamless navigation service transition to GPS users.

50+ Leaders to Watch Facing the Challenges of 2008/2009 May 1, 2008

Who will move the industry and its applications forward in 2008 and 2009? What strategies will they employ and what risks will they undertake? In this special report, we look ahead to identify key indivduals shaping the future of positioning, navigation, and timing (PNT).

Navigating These Mean Streets New Assistance Standards Embrace Galileo, GLONASS, QZSS, SBAS Oct 1, 2007 By: Umit Ozguner, Keith A. Redmill, Charles Toth, Dorota A. Grejner-Brzezinska

DARPA's upcoming Urban Challenge will showcase capabilities for effective real-time mapping by robotic vehicles requiring sophisticated sensing capabilities to cope with the object-rich urban setting, where moving objects will also be present.

Finders Keepers Uncovering the Value Chain for Location-Based Services Oct 1, 2007 By: Joseph Averkamp

The ultimate winners appear to be the Internet and software players. The key to success remains content and the software that delivers it.

Who will move the GNSS industry and technology forward into 2007 and 2008? What are their goals, and what strategies will they employ?

Meet GIOVE-A Galileo's First Test Satellite May 1, 2007 By: Elizabeth Rooney, Martin Unwin, Andrew Bradford, Philip Davies, Giuliano Gatti, Valter Alpe, Giuseppe Mandorlo, Maktar Malik

Galileo satellites must operate in a harsh environment more than 20,000 kilometers above the Earth, through the intense Van Allen electron belt. Key team members describe the design, manufacture, launch, and commissioning of the demonstration satellite GIOVE-A.

Want to know exactly where you stand in the world? The next generation of global navigation satellite technology will help you with pinpoint accuracy.

A pseudolite system developed for the U.S. Army uses signals of opportunity to enable high-precision navigation in regions of GPS denial. The embedded flexible, software-controlled architecture enables the system to reconfigure itself to meet diverse threat scenarios. The system can also cope with signal obstruction for civil users — including first responders — in urban canyons.

Ready to Receive: Developing a Professional Antenna for Galileo Feb 1, 2007 By: Robin Granger, Peter Readman, Steve Simpson

Can a multi-band antenna cover all the carriers necessary in a modern GNSS, or does the advent of Galileo demand a true wideband technology? The mechanical and resultant electrical symmetry of such a combined GPS+Galileo antenna must provide the phase-center stability with direction of signal arrival necessary for geodetic grade performance. The authors discuss the relative merits of different technologies and offer a detailed analysis of their candidate antenna design.