Fun GPS navigation systems

The GPS navigation instrument in recent years, the rise in the market, it appears to people's travel has brought a lot of convenience. Cast aside the heavy maps, the driver entered the destination as long as car navigation systems, the system will be under the built-in electronic map automatically calculates the most suitable route, and in vehicles at any time during the trip to remind motorists to pay attention. Throughout the moving process, the drivers do not have to consider the routing problem, even in completely unfamiliar city, Navigator will automatically lead to an established destination for the driver OK.

While the 1.5 inch GPS navigation systems because of its professionalism, convenience and an increasing number of car owners of the concern, but there are still many consumption on the concept of GPS navigator confused, so let's open a literacy reprint, universal access to one point on the GPS navigation systems of knowledge.

What is a GPS navigator?

To put it simply, GPS navigation systems is the ability to help users to accurately locate the current location, and calculated in accordance with established travel destination, through the map display and voice prompts guide the user in two ways trip to the destination of the motorist auxiliary equipment.

It consists of two major components: First, global positioning system (Global Positioning System) referred to as GPS. It is from space satellites, ground control and user receiver such as three major components. In space, there are 24 satellites to form a distribution network, located in six separate 20 thousand kilometers from the ground, tilt angle of 55 ° of the Earth's quasi-synchronous orbit, each orbit has four satellites. GPS satellites orbit the earth every 12 hours a week, anywhere in the planet capable of simultaneously receiving 7 to 9 satellite signal. The ground control station, and a total of five monitoring stations are responsible for satellite monitoring, telemetry, tracking and control. They are responsible for each satellite observations to the master control station to provide observation data. Master station receipt of data, each satellite to calculate the exact location at every moment, and through three injection station will send it up to the satellite, the satellite and then the data via radio waves to the ground-launched to the user receiver equipment .

Note: This system was originally proposed by the U.S. armed forces in the 20th century, was jointly developed by 70 years, its main purpose is to land, sea and air to provide real-time three main areas, all-weather and global navigation services for intelligence gathering, nuclear explosion monitoring and emergency communications and some other military purposes, is a major global strategy for the deployment of U.S. hegemony. GPS system after more than 20 years of research laboratories at a cost of 30 billion U.S. dollars, until March 1994 global coverage of up to 98% of the 24 GPS satellite constellation was formally laid to complete. Now GPS System is not only limited to the military field, but rather developed to car navigation, atmospheric observations, geographic surveying, marine rescue, protection, manned spacecraft exploration and other fields.

Second, a car GPS navigation system. Light a GPS system is also not enough, it is only capable of receiving GPS satellites to send data to calculate the user's three-dimensional position, direction and velocity and time information, there is no path to computing power. Users in the hands of GPS receiving equipment in order to achieve route navigation function also need to include a complete hardware, electronic maps, navigation software, including car navigation systems