What Is GPS Navigation System
What is GPS (Global Positioning System)? How a GPS navigation system works?
✍: FYIcenter.com
The GPS (Global Positioning System) is a space-based satellite navigation system that provides location and time information in all weather conditions, anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. The system provides critical capabilities to military, civil and commercial users around the world. It is maintained by the United States government and is freely accessible to anyone with a GPS receiver.
GPS has become a widely deployed and useful tool for commerce, scientific uses, tracking, and surveillance. GPS's accurate time facilitates everyday activities such as banking, mobile phone operations, and even the control of power grids by allowing well synchronized hand-off switching.
A GPS navigation system can precisely calculate its location on the earth by
processing messages received from multiple GPS satellites as shown in the diagram below:
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