ESA reported on October 20, 2026, that the first Galileo Second Generation (G2) signal-generation module had passed examinations in Toulouse, France, and returned to Airbus Defence and Space’s facility in Friedrichshafen, Germany. The module generates navigation signals from timing information supplied by the satellite’s onboard atomic clocks.
What the signal-generation module does
The module turns precise clock timing into navigation signals for users on Earth. ESA says the G2 design can generate a variety of signals in real time and can be reprogrammed in orbit to create new ones.
ESA presents that flexibility as a way to adapt Galileo’s signals and potentially improve resistance to interference, signal-acquisition speed, and positioning accuracy. These are intended benefits of the design.
Three Galileo-related systems with different jobs
The spacecraft module, a ground-system test bed, and a receiver simulator all relate to Galileo testing, but they operate in different contexts and do different work.
| System | Operating context | Function |
| Galileo G2 signal-generation module | Spacecraft subsystem | Generates navigation signals using timing information from onboard atomic clocks. |
| G2 System Test Bed (G2STB) | Ground-system platform | Supports verification and validation, monitoring, troubleshooting, prototyping, and experimentation. |
| R&S®SMBV100A | Receiver-testing equipment | Simulates GNSS signals, including Galileo signals, for receiver tests. |
The G2STB is a ground platform associated with GMV. The R&S®SMBV100A is a GNSS signal simulator from Rohde & Schwarz. Neither is the signal-generation module examined for the satellite.
The next planned integration steps
In its October 20 update, ESA said the module was expected to be paired with a radio-frequency (RF) output module to form the satellite payload. Payload testing and full integration of the first flying satellite model were planned for 2027.
ESA also said six G2 satellites were at different stages of integration in Friedrichshafen at the time of its update, and that twelve were expected to join the existing Galileo fleet in the coming years.
