China Beidou No. 3 is two years old!Douyin, the chief teacher of Beidou, answer where it is strong

Today, two years ago, on July 31, 2020, Beidou III global satellite navigation system was opened.

The "Beidou III System" is a global satellite navigation system developed by China. Its comprehensive completion and service means that China has become the third country in the world with the global satellite navigation system in the world.

Recently, Lin Baojun, deputy dean of the Teacher of the Chinese Academy of Sciences and chief designer of the Beidou 3 satellite system, was the "My Star Sea". He talked about the "Beidou III System" research and development process and the main functions of science. Lin Baojun expects that Beidou satellite navigation technology will benefit the world and allow everyone to enjoy high -tech services from China.

The Americans did not do anything

Chinese scientists have done it

I have dealt with Beidou for more than 10 years. Someone came to ask from time to time -there is no technology in the United States. Can we do it? Lin Baojun admits that this is his most difficult question.

In the field of aerospace, the proportion of satellites adopts new technologies generally does not exceed 30%. The overcome of a key technology often takes more than ten years of effort. Satellites have been on orbit for more than 10 years, which means that the satellites will inevitably encounter technology "ceiling" in the later period, and the competitiveness will be greatly reduced. Lin Baojun hopes to promote the leapfrog development of the Beidou satellite. He was unwilling to be restricted by difficulties. It took time to think about the feasibility of the team, not to take ordinary ways, and boldly innovated.

In the end, the new generation of Beidou navigation satellite starting star has more than 70%of the new technologies. In addition, the development team only took 3 years and 3 months to do the 20 -year thing from the US GPS2 to GPS3. Lin Baojun led the team to tackle dozens of key technologies. Among them, the Star -to -Star link technology was the first team, and the "one -star and star -seeking" were achieved. The efficiency is increased by 10 to 30 times, and the measurement and control coverage rate is increased from 30%to 100%, which solves the bottleneck problem that restricts the Global networking of Beidou.

In the show "My Star Sea", he recalled affectionately that when he was just doing the Star -Room link system, everyone felt unreliable. "Can the Chinese team have not done even if they have not done it? I decided to try it at that time. If I do n’t go forward, our Beidou III system may not be as good as everyone now. ","

Where is China Beidou stronger?

Lin Baojun has previously stated many times that compared with the US GPS and the Glonas navigation system in Russia, "the function of Beidou has its own unique secrets.

In the Douyin show, he summarized the "1+6" feature of Beidou. "1" refers to basic navigation, positioning, and timing function. 6 refers to services such as regional short newspapers, global short newspapers, search and rescue services, star -based enhancement, foundation enhancement, precision single -point positioning and other services. Subsequent development will make "1" stronger and stronger, and the function of "6" will become more and more abundant.

Lin Baojun said that the function of the short newspaper is the function of our Beidou and other systems. This function can be simply understood as "send text messages with satellite signals". For example, during the Wenchuan earthquake, all the navigation systems of the entire ground facility were not good. The first person to pass the information was to use Beidou's short newspaper. According to reports, Professor Parkinson, the father of the US GPS, praised Beidou's function: you can know where you are and where I am.

Lin Baojun said, "When the fishermen go out to the sea, they can seek help through Beidou. He can not only send out his position and situation, but also receive a reply. The fishermen know that someone has come to save him. After the successful networking of Beidou 3, the overall system of the system of the system has completed the upgrade and expansion, which can transmit text, but also transmit voice and pictures.

In addition, the network satellite of Beidou No. 3 uses "one star and two bells", and at the same time configures two hydrogen clocks and two clocks to ensure that the accuracy of Beidou is about 10 times higher than other navigation systems in the world. One second.

The popular science group behind "Beidou"

It is understood that the popular science programs participated by Lin Baojun have received 6.6 million people watching on Douyin. A netizen commented that Beidou was very good, but did not expect such a bull. In recent years, more and more scientists have paid attention to the "Beidou III" and answered questions including how the Beidou project was born, which technologies it used, and how Beidou influenced our lives.

Xu Ying, a researcher at the Institute of Empty Information Innovation of the Chinese Academy of Sciences, served as the chief designer of the Beidou Special Test System System. At the beginning of 2022, the University of Chinese Academy of Sciences moved Xu Ying ’s Popular Beidou video to Douyin, which was very popular, and the broadcast volume had exceeded 70 million.

In addition to openness and compatibility, another important principle of Beidou is "autonomous". All antenna, radio frequency, baseband, atomic clock and user terminal are 100%domestic. "The core key technologies will never be required. If you don't come, you can only rely on yourself. Only the core key technology does not depend on other countries can you be called true independence." Xu Ying said in the video.

The three -year -old rocket is called the "exclusive train" of the Beidou navigation project. In 20 years, the three -year -old series of rockets launched a total of 44 launch, successfully escorting the four Beidou navigation test satellites and 55 Beidou navigation satellites. In July of this year, the former three -year -old rocket chief designer and commander, 84 -year -old academician Long Lehao ​​appeared in the knowledge column "Academician Kai" jointly launched by Douyin and the Chinese Association for Science and Technology. He believes that the overall performance of the Beidou III system does not lose the US GPS. Long Lehao ​​said that the northern Dipper's core PNT system built in 2035 will be my country's core space infrastructure. From a physical distance point of view, Beidou Satellite is far from the high altitude of more than 30,000 kilometers from the ground. In another issue of "Academicians", he said that the agricultural machinery of the Beidou navigation positioning system can easily perform fertilization, spray pesticides, etc., and realize that people can complete farmland operation without entering the field. Zhao Chunjiang expects "agricultural machinery+Beidou" to attract more young people to engage in agriculture.

Xu Ying said that she was often asked by reporters. What are the disadvantages and deficiencies compared to other foreign guard systems abroad? She believes that Beidou's "biggest shortcomings" lies in two or three decades later than GPS, and it is not as good as GPS in terms of maturity and popularization of applications. This is one of the reasons for Xu Ying's insistence on popular science.

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