Satellite navigation systems act as guide both in space and on Earth

Last Updated: Tue, Nov 20, 2012 11:50 hrs

Satellite navigation systems are used by spacecraft - like Europe's ATV - for guidance in orbit, but they also help mobile-phone users figure out where they are based on their position relative to the satellites.

These location-centric services round out the experience by bringing in relevant local information - about shops, public transit or weather.

Europe's Galileo satnav system, built for civil use, is based on 30 satellites and a ground control network, and can define your position precisely to within a few metres. (ANI)

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