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.

Apples to Apples Standardized Testing For High-Sensitivity Receivers Jan 1, 2008 By: Alexander Mitelman, Per-Ludvig Normark, Martin Reidevall, Stuart Strickland

Many products have similar performance specifications, but specified performance and measured performance can vary widely. Here, the authors describe how a standard methodology precisely defines acquisition, tracking, and reacquisition, using specific input signals to test each quantity.

Lieutenant General Michael Hamel (MH), Commander of Air Force Space Command?s Space and Missile Systems Center (SMC) in Los Angeles, California, spoke with contributing Editor Don Jewell (DJ) about changes to the space acquisition process, separation of the GPS ground and space segments, and the next generation of user equipment.

Orbit Data and Resources on Active GNSS Satellites

In 2007, we will witness an early glimpse of the magnitude of GNSS promise with satellite launches in GPS, GLONASS, Galileo GIOVE-B, and Compass. Today, customers all over the world understand the benefits of GNSS innovation. When they choose products that include expanded GNSS capabilities, they will continue to expect to improve the way they live and work.