Don't think this problem is funny, there are people who are unclear. If you just determine the GPS on your mobile phone as the GPS satellite navigation system in the United States, it is still true. In fact, the "GPS" in the mobile phone setting is not exactly the GPS satellite navigation system in the United States, but refers to various satellite navigation systems. The most ridiculous thing is that a few people regard my country's Beidou navigation system as a "GPS". Well, this can only be said that the name of GPS is so good. The "global positioning system" is indeed easy to misunderstand it as a definition, not a name. If you accidentally put other satellite positioning systems in the category of its category Essence In fact, the global navigation satellite system is abbreviated with GNSS. The GPS is just a name, which is not essentially different from Zhang Sanli and Si. There are currently four global mature GNSS: the United States Global Positioning System (GPS), China's Beidou Satellite Navigation System (BDS), Glonass in Russia, and Galileo, the European Union.

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