Galileo Validation The Navigation Message Feb 1, 2008 By: Michel Tossaint, Stefano Binda, Jörg Hahn, Marco Falcone

The GIOVE-A satellite broadcast Galileo's first signals on January 12, 2006. GIOVE-B is scheduled for launch on April 14, 2008. The authors describe generation of the first Galileo navigation messages, operational and performance aspects, and signal improvements. Some improvements have been already identified, and their implementation is ongoing.

Innovation: Time for GIOVE-A The Onboard Rubidium Clock Experiment May 1, 2007 By: GIOVE Mission Clock Experimentation Team

One candidate clock for future Galileo satellites is the European Rubidium Atomic Frequency Standard. Two of these clocks are flying onboard GIOVE-A.

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.

Galileo Signal Experimentation May 1, 2007

The GIOVE-A satellite, transmitting the full set of modulations envisaged for Galileo (except MBOC), presents the first opportunity to assess performance of the future signals in real-life conditions, under interference and multipath. Signal, receiver, and sensor-station experimentation demonstrate that all Galileo signals perform significantly better than GPS-C/A with regard to noise and multipath performance.

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.

GIOVE'S Track Nov 1, 2006 By: Marco Falcone, Daniel Navarro-Reyes, Jörg Hahn, Michiel Otten, Ricardo Piriz, Mike Pearlman

In preparation for the deployment of the Galileo system, the European Space Agency (ESA) began development in 2003 of two Galileo In-Orbit Validation Element (GIOVE) satellites: GIOVE-A and GIOVE-B.

Innovation: Searching for Galileo Reception and Analysis of Signals from GIOVE-A Jun 1, 2006 By: Mark L. Psiaki, Todd E. Humphreys, Shan Mohiuddin, Steven P. Powell, Alessandro P. Cerruti, Paul M. Kintner, Jr.

Researchers sought to determine whether the GIOVE-A L1 binary offset carrier signal could be acquired and the PRN codes uncovered using codeless acquisition and statistical signal processing techniques. The short answer: Yes!

The Big Five European nations have reached an interim financial agreement on Galileo’s first industrial phase.

Early Results Are In Nov 1, 2005 By: Neil Gerein, Michael Olynik, Michael Clayton, Jonathan Auld, Tony Murfin

The Galileo Test Receiver will enable developers to add other frequencies and services in the future, and a new single-channel L1/E5a Galileo transmitter lets designers perform in-lab demonstrations and signal-in-space testing.