Car navigation is the use of car GPS (global positioning system) with electronic maps to carry out, it can easily and accurately tell the driver to the destination of the shortest or fastest path, is a good helper of the driver.
Geostationary satellites located above the Earth were originally used for military and aviation navigation. The United States government relaxed restrictions on the use of synchronous satellites in the 1980s, opening up a new world for their widespread adoption. The subsequent commercial communication satellites have greatly increased the accuracy and coverage of communication satellites.

In recent years, the development of car navigation system is very rapid. At present, people can not only choose the navigation system as an option when buying a new car, but also install the device in the existing car, and even configure a mobile satellite navigation system, drive that car, put it in that car, or take it to the wild, mountain climbing.
There are four important factors in a satellite navigation system for car drivers: satellite signal, signal reception, signal processing and map database.
In-car navigation features a GPS global positioning system that allows you to know your exact location whenever and wherever you are driving the car. Car navigation Its automatic voice navigation, the best path search and other functions let you all the way shortcut, unimpeded, integrated office and entertainment functions let you easily drive, efficient travel! General car navigation functions are DVD player, radio reception, Bluetooth hands-free, touch screen, optional function, intelligent track reverse, tire pressure detection function, virtual six disks, background control function!
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