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How the Galileo atomic clocks work
 
 
  Rubidium clock
 
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Rubidium clock
ESA chose the rubidium and hydrogen maser clocks because they are very stable over a few hours and their technology can fly onboard the Galileo satellites.

Credits: ESA
 
  Hydrogen maser clock
 
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Hydrogen maser clock
Hydrogen maser clock

Credits: ESA
 
  Last update: 1 July 2010 
 
First stages of Galileo
Galileo testbedsFirst two satellites
In-orbit validation
OverviewIn-orbit validation system: the first 4 satellites
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The constellation: 27 satellites + 3 in reserveGalileo system
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Galileo signals and frequenciesHow do the Galileo clocks work ?ReceiversServices
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Galileo website (European Commission)European GNSS Supervisory Authority (GSA)GPSGLONASSCENC
 
 
 
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