Satellite navigation device
Device to deduce location from satellite signals
Satellite navigation device
A satellite navigation device, also called a satnav device or GPS/GNSS device, uses satellites of the Global Positioning System (GPS) or other global navigation satellite systems (GNSS) to determine the user's geographic coordinates. It may also display the user's position on a map and offer routing directions (as in turn-by-turn navigation). There are four global navigation satellite systems (GNSS): the United States' Global Positioning System (GPS), the European Union's Galileo, Russia's GLONASS, and China's BeiDou Navigation Satellite System. These systems are often used together to improve positioning accuracy and availability. In addition, regional systems such as India's NavIC and Japan's Quasi-Zenith Satellite System (QZSS), augment the accuracy of a number of GNSS over their respective regions. A satellite navigation device can retrieve location and time information from one or more GNSS systems in all weather conditions, anywhere on or near the Earth's surface. Satnav reception...
Read on Wikipedia · Image Humberto Möckel, CC BY-SA 3.0
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