GPS receiver

GPS receiver

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Credit: MARTIN RIEDL/SCIENCE PHOTO LIBRARY

Caption: Global positioning system (GPS) receiver held in a hand. 24 GPS satellites trace precision orbits around the Earth. Each satellite transmits radio signals that can be detected by this receiver. Three signals allow calculation of latitude and longitude. A fourth signal allows altitude calculations. Transmission of time data allows the calculation of local time. This is a Magellan GPS 315 receiver being used in the Canadian Arctic.

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Keywords: 315, arctic, canada, canadian, cold, communication, communications, device, electronic, electronics, exploration, explorer, freezing, frozen, global positioning receiver, gps, hand, ice, location, magellan, navigation, navigational, polar, portable, remote, satellite, snow, survival equipment, technological, technology, telecommunication, telecommunications, wilderness

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