Traditional Culture Encyclopedia - Traditional customs - What are the ancient ways of positioning and navigation in China?
What are the ancient ways of positioning and navigation in China?
Passive ranging (satellite real-time broadcast ephemeris) such as gps in the United States, glonass in Russia and galileo in Europe.
Active ranging (the receiver needs to send a signal to the satellite, and then the satellite sends it to the ground receiving station for confirmation, and then the satellite sends data to the receiver after confirmation), such as Beidou satellite navigation system in China, but it is said that passive ranging is not only true, but also false.
The positioning methods are all space rear intersection.
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