2. China, the United States, Europe and Russia four major navigation systems

Satellite navigation and positioning system is an important information infrastructure and strategic facility of a country, and an important symbol of a country's comprehensive national strength.

With the process of social informatization, satellite navigation systems not only play an increasingly important role in national security, but also in commercial applications. The GPS system is a typical example. It uses 24 satellites to complete the air positioning, this system has been applied all over the world, everyone finds it very convenient, such as car GPS, as long as you set the target, it will choose the best route for you, it will tell you where the next intersection is, and ......

"Jin Yinan Speaks: The World Pattern, China Has an Attitude" Security Threats 1000 Kilometers Away from the Earth (Outer Space)_2.The four major navigation systems of China, the United States, Europe and Russia are being hit, please wait for a while,

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