What does car navigation mean?

Use GPS (Global Positioning System) and electronic map for car navigation. It can tell the driver the shortest or fastest route to the destination conveniently and accurately, and it is a good helper for the driver.

Geosynchronous satellites located above the earth were originally used for military and aviation navigation. The U.S. government relaxed the restrictions on the use of synchronous satellites in the 1980s, which opened up a new world for the subsequent wide adoption and greatly increased the accuracy and coverage of communication satellites.

Vehicle navigation system is mainly composed of navigation host and navigation display terminal. The built-in GPS antenna will receive data information from at least three of the 24 GPS satellites orbiting the earth, so as to determine the current position of the car.

Extended data:

By matching the position coordinates determined by the navigation host through GPS satellite signals with the electronic map data, the accurate position of the car in the electronic map can be determined.

On this basis, it will realize many functions, such as driving navigation, route recommendation, information inquiry, playing AV/TV and so on. The driver only needs to look at the picture on the display screen, listen to the voice prompt and manipulate the remote control in his hand, so as to realize the above functions and drive easily.

Automobile GPS navigation system consists of two parts: one part is composed of GPS receiver and display equipment installed in the automobile; The other part is composed of computer control center, and the two parts are connected by positioning satellites.

References:

Baidu encyclopedia-automobile navigation