DETLEV VAN RAVENSWAAY / SCIENCE PHOTO LIBRARY DETLEV VAN RAVENSWAAY / SCIENCE PHOTO LIBRARY
Galileo navigation satellite network. Artwork of six of the navigation satellites of the European Galileo network. Their orbits around the Earth are shown in yellow. Galileo will be a civilian global positioning system (GPS) that will consist of 30 satellites (27 operational plus 3 spares) orbiting over 23,000 kilometres above the Earth. The orbits will ensure sufficient coverage for the accurate calculation of positions on Earth. Galileo will be more accurate than, and compatible with, the other GPS systems. Applications include car, train and aircraft guidance, road use taxation, and rescue services. Full operation is scheduled for 2008.
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