Swiss atomic clocks even, but they had some issues. https://spacenews.com/rash-of-galileo-clock-failures-cast-doubt-on-timing-of-upcoming-launches/ https://spac

Swiss atomic clocks even, but they had some issues. https://spacenews.com/rash-of-galileo-clock-failures-cast-doubt-on-timing-of-upcoming-launches/ https://spacenews.com/rash-of-galileo-clock-failures-cast-do... Wouldn't be too surprised if that ground station's job (which I guess is compensating for relativistic effects to the clocks' timing) was extended to compensate for rebooting clocks.