GPS is the Global Positioning System. In short, this is a satellite system consisting of 24 satellites covering the world. This system ensures that four satellites can be observed together on the planet at will, to ensure that the satellite can collect the latitude and longitude and altitude of the observation point in order to complete navigation, positioning, timing and other functions. This skill can be used to guide aircraft, boats, vehicles, and individuals to safely and accurately follow a selected route and arrive at the intent on time.
Application: Shaanxi GPS has been widely used in aerospace, aviation, sail sea, transportation, measurement, exploration, logistics industry, vehicle scheduling, car navigation and many other areas.
The full name is: Global System for Mobile Communications, Chinese is a global mobile communication system, commonly known as "Global Access", is a mobile communication skill specification originated in Europe, is the second generation of mobile communication skills, its development intention is to enable the world to Using a mobile phone network specification together, users can travel around the world with a single mobile phone. China introduced this skill specification in the early 1990s. It has been the use of cellular imitation mobile skills, that is, the first generation of GSM skills (December 31, 2001, China closed the imitation of mobile networks). At present, China Mobile and China Unicom each have a GSM network, which is the world's largest mobile communication network. The GSM system includes several frequency bands such as GSM 900:900MHz, GSM1800:1800MHz and GSM-1900:1900MHz.
Jiangmen car navigation system
Use: Generally used in remote meter reading, survey industry, etc.
GPS and GSM positioning principles and differences
GPS is used for satellite positioning. It requires a GPS chip (a GPS chip that contains a chipset of RF RF chips, baseband chips and microprocessors). Generally, it can be positioned by simply connecting three satellites.
GSM is based on base station positioning. The exact name of GSM is A-GPS positioning. GPS chips are not required. The principle is to confirm the position through neighboring signal base stations.
Comparison between the two
GPS demand to find satellite positioning, search speed depends on the thickness of the cloud layer and other factors, the first search speed is slower, but then only the proximity of the search star is faster, the advantage is accurate positioning, generally a few meters.
GSM uses the base station to confirm the azimuth, but only confirms the approximate orientation, and needs to connect to the network, which consumes traffic, and the positioning error is very large, generally about one or two hundred meters.
Therefore, GPS positioning is generally used, or with GSM, and now GPS positioning is generally GPS+GSM positioning.