Europe’s satellite navigation ambitions reached a new milestone on 28 March, as the European Space Agency (ESA) launched the first two satellites of its Celeste in-orbit demonstration mission from New Zealand aboard Rocket Lab’s Electron rocket. The mission signals a bold move toward a more resilient, sovereign navigation infrastructure designed to complement and reinforce the existing Galileo constellation from low Earth orbit.
The two satellites, built by GMV and Thales Alenia Space respectively, successfully separated from the launcher approximately one hour after liftoff and have now entered their early operations phase, during which mission control teams are configuring the spacecraft for their operational environment.
At the heart of the mission is the validation of core technologies, next-generation signals and expanded service capabilities. The satellites will also bring into use the required L and S-band frequencies in compliance with International Telecommunication Union regulations, a critical step towards securing Europe’s long-term spectrum rights. With additional launches planned for 2027, Celeste will scale to a full constellation of 11 spacecraft, unlocking a broad range of experimentation opportunities across frequency bands, user environments and real-world applications.
“With this mission, we are exploring new frontiers for satellite navigation. Celeste will demonstrate how a satellite navigation constellation in low Earth orbit can complement Europe’s current Galileo system in medium Earth orbit. Celeste was among the first ESA missions to embrace a New Space-inspired development approach, enabling faster and more flexible deployment of satellites and technical capabilities, and ultimately ensuring Europe stays at the forefront of innovation in satellite navigation,” said ESA Director General Josef Aschbacher.
“Over the past two decades, satellite navigation has become integral to our society. Galileo and EGNOS are a European success today, fuelling our society, generating economic growth while ensuring our independence and security. With Celeste, ESA is ensuring that Europe continues to pioneer innovation in positioning, navigation and timing. The mission will demonstrate how a complementary layer in low Earth orbit can enhance Europe’s current navigation systems, making them more resilient, more robust and capable of delivering entirely new services,” said Francisco-Javier Benedicto Ruiz, ESA’s director of navigation.
By flying closer to Earth, Celeste offers the opportunity for more robust signals and new frequencies. The mission will offer an in-orbit test bench for a broad range of applications, such as enhanced navigation capabilities for autonomous vehicles, railway, maritime and aviation, increased availability in urban canyons and remote polar and arctic regions, enhanced positioning and messaging with emergency services during disasters, tracking of connected devices and Internet-of-Things applications, and even indoor navigation.
Following the demonstration activities, the Celeste in-orbit preparatory (IOP) phase, fully supported by ESA Member States at CM25, will leverage European industry to validate the technologies in-orbit and build pre-operational infrastructure. Ultimately, the results of the Celeste mission will prepare European industry and support the European Union’s decision towards the establishment of an operational navigation layer in LEO, complementing Galileo and EGNOS, Europe’s current position, navigation and timing systems.
Europe moves to future-proof its satellite navigation infrastructure | GIM International
