Apart from the support of telecommunication services, satellites also offer satellite navigation as one of their core functions. This method enables the determination of an object’s position. Using suitable technologies and programs, modern satellite navigation makes it possible to determine the coordinates of locations based on their distances to at least three satellites. The construction of the European satellite system Galileo, due to be operational by 2013, is of paramount significance for the commercial use of satellite systems. Galileo will be a system of the European Union which adds to the already existing state-owned US satellite system GPS (Global Positioning System) and to the Russian system Glonass (Globalnaja Nawigazionnaja Sputnikowaja Sistema). The system will comprise 30 satellites. Galileo will make it possible to offer different services which vary in regard to accuracy, number of signals, and reliability of service.