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GPS, or Global Positioning System, is a satellite-based navigation system that provides precise location and time information anywhere on Earth. It works by using a network of satellites that transmit signals to receivers, which use the signals to calculate their exact position, speed, and direction. This technology is used in countless applications, from vehicle navigation and logistics to mapping, and even military and emergency services.

How it works: A GPS receiver on the ground receives signals from multiple satellites orbiting Earth. By calculating the difference in the arrival time of these signals, the receiver can determine its precise location through a process called trilateration.

What it provides: In addition to location, GPS provides users with accurate velocity (speed and direction) and time data.

Key components: The system is comprised of three main parts:

Satellites: A constellation of satellites orbiting the Earth that continuously broadcast signals.

Receivers: Devices that receive signals from the satellites, like the one in your smartphone or car.

Ground control: A network of ground stations that monitor and control the satellites.