The Satellite Safety Question

Inner space is getting more crowded. Since the 1980s, the Global Positioning System constellation of satellites has been in medium orbit some 20,000 kilometers above the Earth and now numbers more than 30. Since 2006 it has been joined by almost the same number of Russian GLONASS counterparts. The...
Alan Dron

Based in London, Alan is Europe & Middle East correspondent at Air Transport World.

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