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New Scientist TV: Why GPS is just a clock in space

New Scientist TV: Why GPS is just a clock in space | Geography Education | Scoop.it

"Thanks to GPS, planes, cars and cellphones can quickly be guided to any destination. The system uses a network of satellites, but how do they relay the correct coordinates from space?  GPS is just a big clock in space. By communicating with four time-keeping satellites, a GPS device can determine it's exact position."

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Geography Education
Digital resources to strengthen the quality and quantity of geography education in classrooms the world over
Curated by Seth Dixon