In the vast universe, the dotted light is not only the embellishment of the night sky, but also the beacon of human exploration of the unknown. And among these lights, there is a special set of "stars" - China's Beidou satellite navigation system, which is telling a scientific and technological legend from catching up to leading in a unique way. Today, China Exportsemi will take you to understand this story in depth.
1. From "Beidou-1" to "Beidou-3": a long march of science and technology spanning 20 years
In 2000, China launched the first Beidou navigation test satellite, opening the way to the construction of the Beidou system. At that time, China was still only a catch-up in the field of satellite navigation, and in the face of competition from mature systems such as GPS in the United States and GLONASS in Russia, the start of Beidou was particularly difficult. However, the Chinese astronauts did not back down, and it took them less than 20 years to complete the leap from Beidou-1 to Beidou-3.
The completion of the Beidou-3 system marks China's firm foothold in the field of global satellite navigation. Its global positioning accuracy is better than 10 meters, and the accuracy in the Asia-Pacific region is better than 5 meters. Behind this achievement is the efforts of countless scientific researchers day and night, which is a vivid portrayal of China's aerospace technology from "following" to "running" and then to "leading".
Today, the goal of the Beidou system is no longer limited to the earth's surface. By 2035, Beidou will achieve full coverage in deep space, indoors, and underwater. This grand blueprint is not only a challenge to technology, but also a firm belief in the future of Chinese astronauts.
Figure: By 2035, the Beidou system will achieve full coverage in deep space, indoors, and underwater
2. Technological innovation: the "double sword" of inter-satellite link and high-precision atomic clock
The core competitiveness of the Beidou system lies in its continuous breakthrough in technological innovation. Among them, inter-satellite link technology and high-precision atomic clocks can be called the "combination of two swords" of Beidou.
The inter-satellite link technology has enabled the interconnection between Beidou satellites, and the TT&C coverage rate has increased from 30% to 100%. This means that even when the ground station is insufficient, the Beidou system can maintain global navigation accuracy. The global constellation elastic multi-mode inter-satellite link invented by the space instrument team of the National University of Defense Technology solves the core requirements of "continuous real-time control of overseas satellites" and "precision orbit determination and time synchronization". This technology not only improves the reliability of the system, but also provides technical support for the global coverage of the next-generation Beidou system.
The high-precision atomic clock is the "heart" of the Beidou system. The performance of the atomic clock directly determines the positioning accuracy of the navigation system. The new hydrogen atomic clock successfully applied by the Beidou system weighs only 13 kilograms, but its performance is comparable to that of the early 23-kilogram atomic clock. This miniaturized, high-performance atomic clock will be used on a large scale in the next-generation Beidou system to further improve the positioning accuracy and reliability of the system.
3. From Aerospace to Civilian: How Beidou Changes Our Lives
The construction of the Beidou system has not only promoted the development of aerospace technology, but also profoundly changed our daily life. According to statistics, the overall output value of China's satellite navigation and location service industry will exceed 500 billion yuan in 2024. The application of the Beidou system covers many fields such as transportation, agriculture, forestry, animal husbandry and fishery, communication timing, and meteorological monitoring.
In Saudi Arabia, the Beidou system is used in the construction of urban municipal infrastructure and the positioning of desert personnel. In Tajikistan, the Beidou system is used to monitor dam deformation and ensure the safety of local people. In China, Beidou has long been integrated into our lives: from smartphone navigation to bike-sharing positioning, from fishing boats to drone delivery, Beidou is everywhere.
With the construction of the next-generation Beidou system, its industrial value will be further released. It is estimated that by 2035, the Beidou system will build a high-precision, high-security spatio-temporal information service infrastructure covering the sky, ground and sea. This will not only promote the deep integration of "Beidou +" and "+ Beidou" industries, but also give birth to a spatio-temporal application service market with a scale of trillions of yuan.
Fourth, to the world: Beidou's internationalization road
The internationalization process of the Beidou system is also accelerating. At present, the Beidou system has been applied in more than half of the countries in the world. China and Russia have signed a cooperation agreement on the interoperability of Beidou and GLONASS systems, and the cooperation between China and Africa and China and Argentina has also been deepened. The Beidou system is not only the pride of China, but also an important force in the field of global satellite navigation.
Through international cooperation, Beidou System is providing more high-quality and reliable navigation services for users around the world. It is not only a symbol of China's scientific and technological strength, but also China's wisdom and strength to contribute to global scientific and technological progress.
5. Beidou Vision 2035: Full coverage of deep space and deep sea
In 2035, the Beidou system will complete the construction of the next-generation system to achieve full coverage of deep space, indoor and underwater. At that time, the Beidou system will provide high-precision navigation services from meter to decimeter. The realization of this goal will not only enable China to occupy a leading position in the field of global satellite navigation, but also make greater contributions to the scientific and technological progress and improvement of human life.
The construction of the Beidou system is a microcosm of the development of China's aerospace technology. From Beidou-1 to Beidou-3, and then to the next-generation Beidou system in 2035, Chinese astronauts have interpreted what "corner overtaking" is with practical actions. The goal of full coverage of deep space and deep sea is not only a technical challenge, but also a firm belief in the future of Chinese astronauts.
Conclusion: Let the world witness the power of China's aerospace
The story of Beidou is a story of dreams and struggles. It tells us that the power of technology can change the world, and that strong belief and unremitting efforts are the key to realizing that dream. In 2035, when the Beidou system is fully completed, it will not only be the pride of China, but also the well-being of all mankind. Let us look forward to the light of Beidou illuminating a farther future and allowing the world to witness the power of China's aerospace.
