This innovative book provides an expert insight into the detailed operation mode of the European Global Navigation Satellite System, GALILEO. The title covers all the 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 the GNSS, related items such as EGNOS, and/or other augmentation systems. Close attention is paid to the innovative characteristics and services offered by GALILEO, and its detailed features are also covered. An extensive bibliography is provided, so that the reader can further explore areas of interest.