Anna satellite has been marked healthy

FinnRef stations around Finland report that four new Galileo satellites have been marked healthy for navigation and positioning services since 11 February 2019. One of the satellites is nicknamed Anna, after the child who won the Galileo Children's Drawing Competition in Finland.

A picture of Earth.

The new satellites increases the Galileo constellation to a total of 26 satellites in orbit from which 22 satellites are in operation. The latest Galileo quadruple are named Tara (E36/GSAT0219), Samuel (E13/GSAT0220), Anna (E15/GSAT0221), and Ellen (E33/GSAT0222). They were launched on 25 July 2018.

"The development has dual benefit to the users. First, the users benefit from the increased availability of the Galileo-only services. Second, the users also benefit from more reliable navigation and positioning services by combining Galileo signals with signals from other constellations. Shortly, it means independency and complementarity”, says Senior Research Scientist, Dr. Octavian Andrei.


Kaavio. Vasemmalla Galileo-satelliitit, keskellä GPS-satelliitit, oikealla molemmat näkyvissä.
Available Galileo (left), GPS (middle) and combined (right) satellites as seen from the FinnRef tracking station in Metsähovi at 18:00 UTC on 11 February 2019. Picture: Octavian Andrei.


Galileo is the Global Navigation Satellite System (GNSS) built by the European Union. Galileo is the first and only GNSS under civilian control. Upon completion, the system will consist of 30 satellites in three orbital planes at an altitude of 23222 km. Galileo is expected to reach fully operational capability in 2020. Galileo satellites transmit signals on the same frequencies as other GNSS in order to enhance interoperability.

FinnRef tracks more than 100 GNSS satellites

"Our FinnRef station located at the Metsähovi geodetic research station has been tracking the new Galileo satellites since they started broadcasting testing signals. Therefore, the station detected immediately when the new satellites were marked healthy", says Dr. Andrei.

FinnRef network includes state-of-the-art multi-constellation tracking stations distributed around Finland. These stations are capable of tracking multiple satellite signals on multiple L-band frequencies from more than 100 GNSS satellites, including the European Union's Galileo, US GPS, Russian GLONASS, and Chinese BeiDou constellation.

Finnish Geospatial Research Institute is currently monitoring the quality of Galileo System using 20 FinnRef stations as part of an international project funded by the European GNSS Agency (GSA).

More information

Senior Research Scientist, Dr. Octavian Andrei, +358 46 921 1423,

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