Three channels are reserved for future applications. This internet site is developed to provide extensive in-depth information on Eurofix understandable to potential providers, receiver manufacturers, users, scientists, students and other interested people. GNSS is short for the generic Global Navigation Satellite System.
Satellites broadcast precisely defined signals that are used for ranging and data transmission.
Ranging is used to measure the distance from user to the satellites. For this a GPS receiver measures the propagation time from satellite to receiver. Additionally data broadcast informs the user about the precise position of the satellites and tells the accurate time these signals left the satellites on their way to the users. By tracking at least 4 satellites simultaneously, with this information the user may establish his 3D-position . The two systems have many similarities, therefore, GPS will be discussed only.