The first two Galileo satellites, launched on 21 October, are in the midst of their In-Orbit Test campaign. A detailed check-up is being carried out by ESA's Redu ground station in Belgium to ensure their payloads are performing as specified, with no degradation from the launch. The different Galileo signals are being activated and tested one by one. Soon after the payload power amplifiers were switched on and ‘outgassed’– warmed up to release vapours that might otherwise interfere with operations – the first test signal was transmitted in the early morning of Saturday 10 December by the first Galileo satellite. This signal was then captured at Redu. For more: ESA Portal - Galileo in tune: first navigation signal transmitted to Earth
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