The GPS is a satellite-based navigation system that provides geolocation and time information to a GPS receiver anywhere on or near Earth, where there is an unobstructed line of sight to four or more GPS satellites. Operated by the United States Space Force, GPS consists of three main components: the space segment, with 24 to 32 satellites in medium Earth orbit; the control segment, which includes ground stations that monitor and manage the satellites; and the user segment, comprising the millions of GPS receivers used worldwide by civilians, businesses, scientists, and the military.

GPS has revolutionized navigation and timing across various fields. In everyday life, it enables precise route planning and real-time traffic updates for drivers, accurate timing for financial transactions and telecommunications, and tracking of shipments and wildlife. In science, it aids in earthquake monitoring, environmental studies, and meteorology. Military applications include navigation, targeting, and reconnaissance. Despite its widespread civilian use, certain high-performance GPS receivers are subject to export controls due to their potential military applications.