The Magic of GPS
By Simon ShapiroScience fiction author Arthur C Clarke famously said "Any sufficiently advanced technology is indistinguishable from magic." Usually when you discover how a magic trick works, it stops being magic; it becomes much less impressive. But when you discover how GPS works, it becomes even more impressive. So how does it work?The Satellites The first step is to put a bunch of satellites into a geostationary orbit. Which means: the satellite orbits above the…