A Global Navigation Satellite System (GNSS) is a network of satellites that provide accurate location and time information anywhere on Earth. This system helps devices like smartphones and cars determine their precise position using signals sent from satellites orbiting the planet. GNSS is essential for navigation, mapping, and various applications in everyday life. The most well-known GNSS is the Global Positioning System (GPS), developed by the United States. Other systems include GLONASS from Russia, Galileo from the European Union, and BeiDou from China. Together, these systems enhance global navigation capabilities, making travel and logistics more efficient and reliable.