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　　A tracking locator is a terminal that is equipped with a built-in GPS module and a mobile communication module. It is used to transmit the positioning data obtained by the GPS module to a server on the Internet through a mobile communication module (gsm/gprs network), allowing for querying the terminal position on a computer.

　　The spatial distribution of GPS is composed of 24 GPS working satellites, which together form the GPS satellite constellation. Among them, 21 are navigation satellites and 3 are active backup satellites. These 24 satellites are distributed in 6 orbits with an inclination angle of 55 ° and orbit the Earth. The operating period of a satellite is approximately 12 stellar hours. Each GPS working satellite sends out signals for navigation and positioning. GPS users use these signals for their work.

　　Used for controlling the whereabouts of children and the elderly, road patrols, tracking valuable goods, tracking and service dispatch, personal detective tools, personal property tracking, pet tracking, wildlife tracking, freight industry, car anti-theft, bicycle anti-theft, electric vehicle anti-theft, motorcycle anti-theft, bank cash transport vehicles, military and police exercise control, inspection and tracking, official vehicle management, etc.

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