The GPS device is the Global Positioning System. Simply put, this is a satellite system consisting of 24 satellites covering the world. This system can ensure that four satellites can be observed simultaneously at any point on Earth at any time, ensuring that the satellites can collect the longitude, latitude, and altitude of the observation point, in order to achieve functions such as navigation, positioning, and timing. This technology can be used to guide airplanes, ships, vehicles, and individuals to safely and accurately follow the selected route and arrive at their destination on time.

　　Global Positioning System (GPS) is a new generation of space satellite navigation and positioning system jointly developed by the United States Army, Navy, and Air Force in the 1970s. Its main purpose is to provide real-time, all-weather, and global navigation services for the three major fields of land, sea, and air, and to be used for military purposes such as intelligence collection, nuclear explosion monitoring, and emergency communication. It is an important component of the United States' global dominance strategy. After more than 20 years of research and experimentation, costing 30 billion US dollars, by March 1994, 24 GPS satellite constellations with a global coverage rate of up to 98% had been deployed.

　　The GPS global satellite positioning system consists of three parts: the spatial part - GPS constellation; Ground control part - Ground monitoring system; User equipment section - GPS signal receiver.

　　GPS positioning technology has the advantages of high precision, high efficiency, and low cost, and is widely used by various mobile users such as ground vehicles, sea vessels, aircraft, missiles, satellites, and spacecraft for all-weather, real-time high-precision three-dimensional positioning, speed measurement, and precise timing.

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