Why does the U.S. only need 24 satellites for GPS, but 55 for Beidou? I figured it out today.

Why does the U.S. GPS only need 24 satellites, but Beidou needs 55? Today I figured it out!

China, with its 5,000 years of splendid civilization, has many classic poems that have been passed down to this day, in which there are descriptions of the beautiful starry sky. It can be seen that since ancient times, human curiosity about the sky has always existed. In modern times, after the emergence of airplanes and the freedom to fly, people were more eager to break out of the atmosphere and explore the more mysterious universe. After the end of the Second World War, human civilization developed rapidly, and the world industrial revolution began. Major breakthroughs were made in the computer and space industries.

The former Soviet Union successfully launched artificial satellites, and the United States, not to be outdone, successfully sent astronauts to the moon. The United States, in particular, jumped to become the world's superpower, and their GPS electronic navigation system, which is used by people all over the world, has become the world's most popular navigation system.

 
The wisdom of the Chinese people is also infinite, and now, our country's Beidou satellite positioning system has also proudly come out, in terms of accuracy and the U.S. GPS, compared with no less. We all know that modern life, has been inseparable from the use of electronic maps, we can get very accurate navigation services. Greatly improve the convenience and speed of life, which is unimaginable in the previous era when we can only rely on compass or paper maps. All this is inseparable from the civilization of satellite positioning system.
 
Undeniably, the first system to provide global positioning services for the world is the U.S. GPS positioning system, which consists of 24 satellites, while China's BeiDou system requires 55 satellites to achieve global positioning, the positioning system of China and the United States, the gap between the number of satellites is so big, why is it? In fact, experts have long given the answer, today is to understand.
 

Experts say that a positioning system requires that all the satellites serving it have global coverage and that each satellite must follow its own orbit to avoid collision and destruction. Internationally recognized space law has stipulated that the satellite orbit has always been the principle of first-come-first-served, and once another country takes the lead in occupying a certain orbit, the right of attribution is which country's, and other countries launching satellites will have to bypass it.

The U.S. space industry started the earliest, so they can get more and better orbits. The earth is a sphere, with the earth as the center point of the peripheral orbit, the closer to the choice, the shorter the circumference of the orbit, the above can be covered by a relatively small number of satellites. This is why the US GPS system only needs 24 satellites, because, the good orbits have long been selected and used by the US.

 
China launched satellites after the United States, can only choose a more distant orbit, in order to be able to achieve the effect of global coverage, China needs to use the number of satellites will naturally be more. In fact, China's BeiDou system only needs a maximum of 35 satellites is enough, but the Chinese astronauts have always been far-sighted, in order to be able to provide more accurate positioning, but also in order to cope with the possible emergence of satellite emergencies, so chose to launch 55 satellites.
 
In terms of market share, China's Beidou has a wider range of applications, and many neighboring countries are casting friendly gazes at China, expecting to get good cooperation. The technology of Beidou is so advanced that surpassing the GPS of the United States is already within reach. The successful use of Beidou system is a breakthrough in China's aerospace industry, a symbol of China's strength, and a concrete action made by the Chinese people in order to better maintain world peace.