European Sovereignty Monitor

Defence and space

ESA's Celeste satellite sends Europe's first low orbit navigation signal

ESA's Celeste IOD-1 CubeSat, built by GMV and Alen Space with Thales Alenia Space and over 50 entities from 14 countries, sent Europe's first dual frequency navigation signal from low Earth orbit, testing a Galileo resilience layer.

Verified European Space Agency press release, 8 April 2026

What it does not test. Does not establish that a full low orbit augmentation layer will be built or funded beyond this demonstrator.

How this item counts. No movement: no answer to who owns, who operates, whose law governs or who made the parts changes. Weight 0. Demonstrator cubesat sent test signal only; no operational augmentation layer yet committed. European Sovereignty Index

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