GPS is the abbreviation of Globe Position-finding System, which is called “Global Navigation and Positioning Systemâ€. It mainly has navigation, positioning, timing and other functions. It was proposed by the United States from the 1960s and developed in the 1970s. It lasted for more than 20 years and cost 20 billion. The US dollar, a military satellite navigation system built in 1993, has a full range of real-time three-dimensional navigation and positioning capabilities in sea, land and air. With the increasing popularity of GPS applications, it has been widely used in various industries. The operation of the GPS navigator relies on the Global Positioning System (GPS).
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The GPS navigator is composed of three major departments: space satellite, ground monitoring and user reception. The GPS navigator is an instrument that can help users correctly locate the current position and calculate the itinerary according to the established destination. The GPS navigator guides the user to the destination by means of map display and voice prompts, and is widely used in transportation, tourism, etc. Usually, we use the car GPS navigator.
Nowadays, the application of GPS positioning system is not limited to the military field, but has developed into various fields such as car navigation, atmospheric observation, geographic survey, marine rescue, and manned spacecraft protection detection.
The operation of the GPS navigator also requires a car navigation system. It is not enough to have a GPS system. It can only receive data transmitted by GPS satellites, calculate the user's three-dimensional position, direction, and speed and time information. There is no path calculation capability. In order to realize the route navigation function, the GPS receiving device in the user's hand needs a complete set of car navigation system including hardware equipment, electronic map and navigation software.
The GPS navigator hardware includes components such as a chip, an antenna, a processor, a memory, a screen, a button, and a speaker. However, as far as the current situation is concerned, the GPS car navigation system in the market is not much different in hardware. The built-in software map is also difficult to distinguish who is good and who is bad. Now there are eight map companies in China engaged in navigation map software. The mapping and development, such as NavInfo, Kay LiDE, Dao Dao Tong, Intercity Tong......., after several years of continuous development and improvement, have been able to provide quite good navigation map software.
To sum up, a complete GPS car navigation system consists of nine main parts: chip, antenna, processor, memory, display, speakers, buttons, extended function slots, and map navigation software.
GPS navigators bring a lot of convenience to people's lives, so many people want to buy a GPS navigator that belongs to them. How to judge the advantages and disadvantages of GPS navigators? First, the number and path of GPS satellites that the navigator can receive. Planning ability is the key. The second is the planning ability of the path. As long as you can meet the previous requirements, you can purchase this GPS navigator with confidence.
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