A GNSS Receiver is a device that receives signals from Global Navigation Satellite Systems, such as GPS, GLONASS, Galileo, and BeiDou. It calculates the receiver's precise location, speed, and time by analyzing the signals from multiple satellites. This technology is widely used in various applications, including navigation, mapping, and surveying. The GNSS receiver works by triangulating its position based on the distance from at least four satellites. Each satellite transmits a unique signal that includes its location and the exact time the signal was sent. By comparing the time it takes for the signals to reach the receiver, it can determine its position on Earth.