When human beings have left footprints in the land, sea and air, they began to yearn for the more distant universe. After all, in this vast universe, human beings are too small, so out of instinctual curiosity about the unknown, human beings began to use their abilities to explore the mysteries of the universe. In 1957, mankind’s first artificial satellite was successfully launched. The country that launched the satellite was the Soviet Union, and this satellite was Sputnik 1. There is no doubt that the success of the Soviet Union represents a step closer to the exploration of the vast universe. Therefore, the following countries were not to be outdone, and launched one satellite after another into space.
As we all know, satellites are an indispensable existence in our lives. Because it is closely related to the satellite positioning and navigation system researched by the country, whether it is satellite TV or navigation APP, the help of satellite is indispensable. Of course, the most important thing is the guidance operation in the national military field. The satellite positioning system determines the accuracy of the national military weapons to a certain extent. At present, only three countries in the world have their own navigation systems, namely China, the United States and Russia. So do you know their respective satellite positioning accuracy?
The United States is the only superpower in the world today, and its strong economic strength is sufficient to support the United States to do various researches. More than half of the more than 1,000 satellites above the earth are owned by the United States. Relying on the huge satellite group, the United States made the world's first satellite navigation system GPS very early.
The early GPS global positioning system in the United States was actually developed for the military. Later, the United States developed a civilian system and opened it to the world for free. Because the GPS in the United States came out relatively early and the United States is willing to spend money, the accuracy of GPS has reached 0.1 meters, which is basically error-free.
Russia’s predecessor was the Soviet Union, and the Soviet Union was the only country in the world that could wrestle with the United States. The United States has GPS, and the Soviet Union is not to be outdone. The Soviet Union also developed the GLONASS system after the United States. After the Soviet Union collapsed, GLONASS was inherited by Russia. But Russia is also limited to economic issues, so GLONASS has not developed much. It is reported that its accuracy is only 1.5 meters, which is quite far from the United States.
In the early days of China, when it did not have its own satellite navigation system, it always used the American GPS system, but because this system is American, there are some contradictions between the two countries, so China has suffered from GPS several times America's loss. Later, China felt that it could not continue like this, so it began to develop its own country's satellite navigation system.
China's navigation system was not mature earlier, so China divided the navigation system into three steps to complete. In 2000, China had its own Beidou satellite navigation system, although it was only open to China at that time. Although the Beidou system is still immature, the accuracy of the Beidou system is very high, only 0.4 meters, which is already a very good result for China.
In 2020, China's Beidou-3 system has completed the basic construction. The Beidou-3 system and the previous Beidou-2 and Beidou-1 together form China's own Beidou navigation system. China also announced to the world that the Beidou system has officially opened its services to the world. The emergence of the three major navigation systems of
means that the US GPS dominance over the world has been broken. The US can no longer be as unscrupulous as before. China will no longer be threatened by the US because of the lack of a navigation system. Instead, China’s Beidou system is in In the future, it may also threaten the status of American GPS.
