source:truck tracking webfleet solutions release time:2022-10-25 Hits: Popular:realtime gps tracker online
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????Global Positioning System (GPS) is a positioning system studied by the United States. Its characteristics are as follows: it does not need a SIM card, does not need to connect to the network, as long as outdoors, you can basically accurately locate anywhere at any time. However, it takes a lot of time to search for satellites after GPS startup, which usually takes about 2 minutes (commonly known as cold start, which includes :1, the first use of GPS; 2, the depletion of GPS battery; 3, the movement of more than 1000 kilometers in the shutdown state or the continuous shutdown for more than 4 hours). ps: Positioning systems of various countries include: Beidou of China, GPS of the United States, GLONASS of Russia, Galileo of Europe, etc., which are collectively referred to as satellite positioning.
????Principle: The receiver receives the GPS satellite broadcast, through the analysis of visible GPS satellite position, distance and other information and the corresponding algorithm to get their own position information.
????Advantages: High positioning accuracy, as long as can receive the positioning signal of four satellites, can be positioned.
????Cons :GPS is greatly affected by weather and location. When the weather is bad, or under a viaduct/tree shade, or in the side corner of a tall building, underground garage, indoor or outdoor lower garage (or simply when the sky is not visible), the GPS location can be greatly affected, and even the location service can not be performed.
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