摘要：The GIOVE-B satellite — formally, the second Galileo In-Orbit Validation Element — was launched on April 27, 2008 and began transmission of ranging signals on May 07, 2008.
Unlike its predecessor GIOVE-A, GIOVE-B is meant to be a real prototype of future Galileo satellites: the signal generation and clocks are very close to what will be used by the fully operational capability (FOC) Galileo system.
