The Galileo Open Service is a free of charge global ranging, positioning and timing information. Each Galileo satellite transmits navigation signals (Signal-In-Space, SIS) in three frequency bands. The OS SIS, broadcast on two of these bands (E1 and E5), provides seamless performance worldwide in terms of ranging, positioning and timing for users equipped with a Galileo OS compatible receiver.
The Galileo Open Service is provided in both single-frequency (SF) or dual-frequency (DF) mode. In the case of SF mode, the user equipment tracks and processes the information provided by only one of the OS signals.
The Galileo OS is compatible, i.e. operates on no harmful interference basis, with the other GNSS services, such as GPS, GLONASS and BeiDou services, and support an enhanced level of interoperability with GPS.
All the details about the Galileo Services performance can be found in the regular reports published under the Electronic library.