Four worldwide satellite navigation systems, which is better and which is more outstanding?

As we all know, the United States gradually developed a satellite navigation system a long time ago and delivered it in 1964. In 1994, the GPS of the United States was already all sound, and at this moment, the worldwide penetration rate of GPS reached 98%, and many countries and their regions rely on the application of GPS. After the development trend, Russia, the European Union and China have released their own global satellite navigation systems one after another, getting rid of the monopoly of the United States on the industry. Therefore, at this stage, there are four major satellite navigation systems in the gnss module world, which are GPS of the United States, GLONASS of Russia, Galileo of the European Union and Compass of China. They have always been a variety of more, which of these four satellite positioning systems, which is better, which is more outstanding?

According to statistical analysis, among the communication satellites in orbit, 138 satellites are navigation satellites, and among the 138 satellites, Beidou has the highest proportion of communication satellites, followed by GPS, and finally GLONASS and Galileo. In terms of the role, these four systems have the same software, and the most important roles are navigation, precise positioning, rescue, etc. However, Beidou is relatively more extensive in terms of the aspects involved, but since the difference is not very big, it should be considered similar from these levels. In terms of market share, the U.S. has certain advantages, as it is an earlier website navigation system and has been in development for a longer period of time, but in China, most cell phones are now using Beidou software.

For the navigation and positioning system software, there is a very key indicator value, that is, the accuracy of the positioning and navigation are very high standards of accuracy, if the deviation is very large, then the navigation bar and accurate positioning will lose its practical significance. Just look at the civil industry, GPS accuracy of 10 meters, if in the area of nothing to block, can exceed 4-7 meters, GLONASS is 2-8 meters, Galileo is open to the public accuracy of 1 meter, China in the Asia-Pacific region is open to the public accuracy of 5 meters, the global scope of the words, and the United States is the same 10 meters, with improved system software, can achieve 1 meter. As the four sets of system software in the accuracy of the above has a certain fluctuation, so to be more actually less convenient, but it can be clear that the four sets of system software are in the average above, in which GLONASS and Galileo civil type accuracy to more.

The advantage of GPS depends on its high worldwide popularity, while Beidou is very compatible and has a large number of communication satellites, and Beidou also has a role that the other three cell phone positioning systems do not have, that is, it has a built-in communication role, which can transmit the user's location and can play a very important role in rescue. The advantage of GLONASS depends on its high accuracy, while Galileo is the system software with excellent technology and the greatest safety performance.

Comprehensively, it is very difficult to separate out which of the four major satellite positioning systems is better, because they can be said to be different, respectively, have advantages and defects, in some important index values are not very big differences. And in fact, we are now in the application of the navigation bar, and did not use a particular system software, all can accept the data signal of more than one system software, the actual effect can be considered the best.