Latest Galileo satellite arrives at ESA’s test centre

Europe’s latest Galileo navigation satellite has arrived at the Agency’s Netherlands-based technical centre for testing, as the previous two satellites are prepared for transport to French Guiana for launch in summer this year.

The new satellite travelled safely enclosed within an air-conditioned and environmentally-controlled protective container from its manufacturer, OHB in Bremen, Germany, to ESA’s ESTEC Test Centre in Noordwijk, the Netherlands.

The specially-engineered container was only unsealed once the satellite completed its journey by road to the cleanroom conditions of the Test Centre, Europe’s largest site for spacecraft testing, containing a suite of test facilities for space simulations and testing under a single roof.

Meanwhile the previous two Galileo satellites have completed their long test campaign at the Test Centre, and are being finalised for shipping to Europe’s Spaceport in French Guiana, for launch together by Soyuz.

Europe’s first four Galileo satellites are already in orbit, the minimum number needed for achieving a position fix. These ‘In-Orbit Validation’ satellites served to demonstrate the overall Galileo system works as planned, while also serving as the operational nucleus of the full Galileo constellation to follow.

Next comes the 22 ‘Full Operational Capability’ satellites being made by OHB in Germany, incorporating navigation payloads produced by Surrey Satellite Technology Ltd in the UK.

The three FOC satellites currently at ESTEC are the first of these 22 to be tested for launch – all of them will pass through the gates of ESTEC within the next few years on their way to space.

Now detailed ‘acceptance testing’ will be carried out on this latest arrival, to check the satellite workmanship is up to standard.

Key testing includes acoustic testing, to reproduce the violent forces of launch, and a session in a ‘thermal vacuum’ chamber to subject the satellite to the airlessness and temperature extremes it must endure over the course of its 12-year working life.

By its nature, this latest test campaign can occur quicker and less thorough than the full-scale ‘validation testing’ that the first two FOC satellites underwent over the course of the last year, with the overall satellite design having now been validated.

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