Arctic Sweden in race for Europe's satellite launches

As the mercury drops to minus 20 Celsius, a research rocket lifts off from one of the world's northernmost space centres, its burner aglow in the twilight of Sweden's snowy Arctic forests.

Video: Testing Galileo for space

Galileo has grown to become Europe's single largest satellite constellation, and the world's most accurate satellite navigation system, delivering meter-level positioning to more than 3.5 billion users around the globe.

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