A GNSS receiver is a device that receives signals from Global Navigation Satellite Systems (GNSS) to determine its precise location on Earth. It uses signals from multiple satellites to calculate its position, speed, and time. Common applications include navigation for vehicles, smartphones, and outdoor activities like hiking. These receivers work by triangulating signals from at least four satellites. The time it takes for the signals to reach the receiver helps calculate the distance to each satellite. This information is then processed to provide accurate location data, making GNSS receivers essential for various industries, including transportation and mapping.