Galileo is the European Union's Global Navigation Satellite System (GNSS), managed by the European Union Agency for the Space Programme (EUSPA) with design and development by the European Space Agency (ESA). It provides highly accurate, guaranteed global positioning services under civilian control with improved positioning and timing information. Galileo offers various services, including an Open Service (OS) for mass-market use, a Search and Rescue (SAR) function, a High Accuracy Service (HAS), and a Public Regulated Service (PRS) for authorized users.
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u-blox is assessing how an additional orbital layer could improve positioning performance when combined with systems such as Galileo.
Government-operated GNSS systems include U.S. GPS, European Galileo, Russia’s GLONASS, and China’s BeiDou.
Galileo operates in medium Earth orbit.
The EU Space Networks now include Copernicus, Galileo and EGNOS, SSA-STM, and IRIS² as members.
ESA’s Celeste InOrbit Demonstrator program aims to study and demonstrate the benefits of a low-Earth-orbit navigation layer that complements Galileo and EGNOS.
Celeste is ESA’s strategic program for demonstrating an additional low Earth orbit navigation layer that complements Galileo and Egnos.
Galileo operates in Medium Earth Orbit.
The Celeste mission is designed to demonstrate how a complementary low Earth orbit satellite layer can improve the performance and resilience of Europe’s Galileo system.
Norway participates in the Copernicus Earth observation programme and Galileo, the EU’s satellite navigation system.
The Celeste mission is intended to strengthen Galileo with a complementary layer closer to Earth.
GNSS signals from GPS, Galileo, GLONASS, and BeiDou are low in signal strength and are vulnerable to localized electronic warfare.
The Celeste IOD-2 satellite is an upcoming ESA mission designed to demonstrate how LEO satellites can augment MEO systems such as Galileo.
Luis Mayo previously served as CEO of the GMV Group and as president of Galileo Sistemas y Servicios.
The European Union previously established Galileo as a satellite navigation and positioning system that competes with the U.S. GPS system.
The ESA will decide from 2028 whether to approve a fully operational constellation that makes Celeste Galileo’s emergency-response arm.
Celeste is a 11-satellite constellation designed to complement Galileo with rescue capabilities in areas without coverage.
Beaconsat’s interference detection capability is intended to address disruptions affecting navigation systems such as GPS and Galileo.
The Galileo Competence Center at Oberpfaffenhofen began operating Europe's Galileo satellite navigation system in 2007.
The Celeste demonstration mission is scheduled for 2027 and will include Indra’s Vorax satellite platform as a technological contribution to complement the Galileo system.
Galileo’s Open Service Navigation Message Authentication (OSNMA) became officially operational on July 24, 2025.