How can a satellite be used for navigation?

Satellites are used for navigation through systems like the Global Positioning System (GPS), which relies on a network of satellites that transmit signals to GPS receivers on the Earth's surface. By calculating the time it takes for signals from multiple satellites to reach the receiver, the system can determine the receiver's precise location through a process called trilateration. This technology enables accurate positioning and navigation for various applications, including driving directions, aviation, and maritime navigation. Additionally, modern smartphones and devices utilize these satellite signals for location-based services.