How Does GPS Work? | In Orbit | BBC Earth Science

The breakthrough technology that lead to GPS was a clock - but not just any old ticker. Satellite engineer Maggie Aderin-Pocock reveals how this jaw-dropping technology makes our lives run smoothly. Best of Earth Science: http://bit.ly/EarthLabOriginals Best of BBC Earth: http://bit.ly/TheBestOfBBCEarthVideos In Orbit: How Satellites Rule Our World (2012) How the thousands of satellites orbiting the Earth have transformed the modern world. This is a channel from BBC Studios who help fund new BBC programmes. Service information and feedback: http://bbcworldwide.com/vod-feedback--contact-details.aspx