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　　GPS global positioning system is a wireless navigation system that realizes positioning through navigation satellites. It can realize omnipotent (ocean, land, aviation, aerospace), global, all-weather, continuous and real-time navigation and positioning functions, and provide users with precise position and speed information. The system was originally used for military purposes and was later widely used in business and life.

　　Using GPS global positioning system, the positioning accuracy is high, the speed is fast, and the coverage is wide. Users can not only inquire about their location, but also accurately identify the surrounding environment and select the driving route in advance. At present, mobile phones, notebook computers, PDAs, business communications, etc. can implement this function by installing relevant equipment and software.

　　Handheld GPS, Connecting the World

　　Handheld GPS that is both a compass, speedometer, odometer, altimeter and timer. It is small in size, cheap in price, and can work for a long time with two AA batteries. The handheld GPS positioning accuracy is 5~10 meters, which can realize positioning, navigation, finding nearby objects, recording walking routes, and can also be used in combination with computers and handheld computers.

　　The device is widely used in automobiles, and can store hundreds of routes due to its memory function. The route you have traveled before will be automatically prompted the second time you travel. It is reported that the use of GPS does not require payment of subscription fees or installation service fees, but the corresponding GPS software and maps must be purchased. The current satellite positioning device can receive 8 to 10 satellite signals at the same time, and can also be connected to external devices through Bluetooth or data lines.

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In addition to seeing if the GPS is accurate, please also pay attention to the GPS radiation