This innovative book provides expert insight into the detailed operations of the European Global Navigation Satellite System, GALILEO. The title covers all elements necessary for a complete understanding of GALILEO, including existing and future concurrent systems like the GPS system, GLONASS, Beidou, the GALILEO system operation, the integration of GALILEO into GNSS, related items such as EGNOS, and other augmentation systems. Close attention is paid to the innovations offered by GALILEO, as well as details of its features. An extensive bibliography is provided, so that the reader can further explore areas of interest.