On 28th March 2026, the European Space Agency (ESA) launched the first two
Celeste demonstration satellites. This mission initiates ESA’s testing
of a complementary low Earth orbit (LEO) layer to enhance Galileo’s
resilience for European satellite navigation. Built by GMV and Thales
Alenia Space, the spacecraft launched from New Zealand via Rocket Lab’s
Electron. Following […]
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#^Rocket Lab Launches ESA’s Next-Gen Celeste SatellitesOn 28th March 2026, the European Space Agency (ESA) launched the first two Celeste demonstration satellites. This mission initiates ESA’s testing of a complementary low Earth orbit (LEO) layer to enhance Galileo’s resilience for European satellite navigation.
Built by GMV and Thales Alenia Space, the spacecraft launched from New Zealand via Rocket Lab’s Electron. Following a 10:14 CET liftoff, early operations commenced. They will validate core technologies, and new signals on L- and S-band frequencies.
ESA Director General Josef Aschbacher stated: “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.”
Francisco-Javier Benedicto Ruiz, ESA’s Director of Navigation, added: “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.”
LEO altitude offers robust signals and new frequency options, enabling diverse applications: enhanced navigation for autonomous systems, improved availability in challenging areas, and advanced positioning for emergency services.
Subsequently, the Celeste in-orbit preparatory (IOP) phase, backed by ESA Member States, will engage industry to validate technologies and build pre-operational infrastructure. Its findings will inform the European Union’s decision on an operational LEO navigation layer, augmenting Galileo and EGNOS.
Celeste, ESA’s LEO Positioning Navigation and Timing (LEO-PNT) initiative, saw its demonstration phase approved at ESA’s 2022 Ministerial Council and expanded at CM25. It contributes to the European Resilience from Space (ERS) program.
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