Press Conference on The Completion and Opening of Beidou-3 Global Navigation Satellite System
On the morning of August 3, 2020, the press conference on the completion and opening of beidou-3 global navigation satellite system was held in the Information Office of the State Council. Ran Chengqi, director of China satellite navigation system management office and spokesman of Beidou satellite navigation system, Xie Jun, deputy chief designer of Beidou system engineering and chief designer of beidou-3 satellite system, Lin Baojun, chief designer of beidou-3 satellite system, and Chen Jinping, chief designer of beidou-3 project operation and control system, attended the press conference to introduce beidou-3 global satellite The satellite navigation system has been completed and put into operation.
Ladies and gentlemen, dear media friends
Good morning, everyone. It's a great pleasure to attend today's press conference with my three colleagues. In July 31st, general secretary Xi Jinping announced to the world that the Beidou three global satellite navigation system was officially opened, marking the successful completion of the "three step" development strategy of Beidou, and the Beidou stride into a new era of global service. Next, I will introduce the situation from four aspects.
1. The project construction was completed half a year ahead of schedule, showing the speed of China
Overcome the difficulties and finish the job perfectly. Beidou-3 started construction in November 2009. Over the past 10 years, the project construction has gone through five stages: key technology tackling, test satellite engineering, simplest system, basic system and complete system. The global constellation deployment was completed half a year in advance and the whole system service was opened. When completed, it will be opened and opened as a service. The first is to overcome the key core technologies and realize self-control. More than 400 units and more than 300000 scientific and technological personnel have gathered their wisdom to tackle key problems, and more than 160 key core technologies, such as inter satellite links and high-precision atomic clocks, have broken through the localization research and development of more than 500 kinds of device components, and achieved 100% localization rate of core components of beidou-3 satellite. The second is to give full play to the advantages of the national system and complete the networking efficiently. We should strengthen centralized and unified leadership, strengthen the research and development teams of the overall project and the two general managers, innovate the research and construction system based on the overall, technical, quality and progress standards. The development cycle of single satellite is shortened by one quarter, the assembly period of launch vehicle is shortened by one third, and the period of satellite network access is shortened by three quarters. Build and form a risk analysis and control guarantee chain, launch without hidden dangers and go to heaven without doubts. Since November 2017, 18 arrows and 30 satellites have been launched with high-density in two and a half years, and more than 40 ground stations have been built, rapidly forming the satellite ground integrated operation capability. In particular, in the face of the impact of the new crown epidemic and the quality situation risk in the aerospace field since the beginning of the year, the project has paid close attention to the task organization and implementation, product quality review, and task risk prevention and control, so as to achieve a comprehensive victory in the battle of networking and epidemic prevention and control.
2. The system has powerful functions and first-class performance, showing Chinese quality
Pursuit of excellence, world-class. The construction target is benchmarked with the international standard, iterative upgrading and incremental engineering are implemented, and the functional performance index reaches the world-class level. First, the system is powerful. Beidou-3 has two major functions of navigation, positioning and communication data transmission. It can provide seven kinds of services, including positioning and navigation time service, global short message communication, regional short message communication, international search and rescue, satellite based enhancement, ground-based enhancement and precise point positioning. It is a powerful global satellite navigation system. Second, the performance index is advanced. The global positioning accuracy is better than 10 meters, the speed measurement accuracy is better than 0.2 meters / second, the time service accuracy is better than 20 nanoseconds, and the service availability is better than 99%. Here, I'd like to show you a picture to illustrate three points: first, the global service availability of Beidou system. The following picture shows the situation when the basic system of Beidou was just built in 2018. The shaded part in the figure shows the areas that the system can not cover, and the global service availability was 95% at that time; Now, after the completion of Beidou global system, there is no shadow in the above figure of 2020, and the global service availability is more than 99%. The second is the sky map of Beidou satellites over typical regions of the world. The red dots represent the observed Beidou satellites. It can be seen that the number of visible satellites over various regions has increased significantly compared with two years ago. The third is the positioning accuracy of the Beidou system. According to the calculation results of the global continuous monitoring and evaluation system in the latest week, the global measured positioning accuracy of the Beidou system is 2.34M.
Global Beidou system service performance diagram
The short message communication service has been upgraded and expanded. The regional communication capacity has reached 14000 bits (1000 Chinese characters) each time. It can not only transmit text, but also voice and pictures, and support 560 bits (40 Chinese characters) global communication capability each time. Satellite based augmentation service has a kind of vertical guided approach (apv-i) capability, which fills the gap of satellite based augmentation service in China. The detection probability of international search and rescue service is better than 99%, and it has the characteristic ability of back link confirmation, which can significantly enhance the survival confidence of personnel in distress. In addition, ground enhanced and precise single point positioning can also provide the highest centimeter level positioning service. Today, on the basis of the relevant documents released earlier, we released interface control documents for five types of services, including positioning navigation time service (B2B), star based augmentation (bdsbas-b1c), ground-based enhancement, precise point positioning (ppp-b2b) and international search and rescue, and the official website of Beidou was launched simultaneously. The interface control documents of regional short message communication and global short message communication services will be released. So far, the interface control documents released by Beidou system have covered all 7 types of services.
3. Remarkable comprehensive benefits, fruitful achievements, and condensation of China's wisdom "
First, it is an important tool of the country to benefit the country and the people. Beidou system has fully served transportation, public security, disaster relief and disaster reduction, agriculture, forestry, animal husbandry and fishery, urban governance and other industries, and has been integrated into the construction of national core infrastructure such as power, finance and communication. 28nm process chip has been mass produced, and 22nm process chip will be mass produced. Most smart phones support Beidou function, and mobile phones that support Beidou ground-based enhanced high-precision applications have been launched. Set up a set of chips, modules, boards, terminals and operation services as one of the complete industrial chain. In the past 10 years, the total output value of China's satellite navigation and location service industry has increased by more than 20%, reaching 345 billion yuan in 2019 and expected to exceed 400 billion yuan in 2020. Beidou has been applied in China Europe train transportation, construction and operation of Beijing Zhangjiakou high-speed railway, civil aviation, etc. the high-precision service based on Beidou has played an active role in fighting against the new epidemic situation and flood in southern China. It is speeding up its entry into new infrastructure, and is deeply integrated with new technologies such as new generation communication, blockchain, Internet of things, artificial intelligence, and so on Come forth. Second, China's Beidou, the world's Beidou. Beidou is one of the four major global satellite navigation systems approved by the United Nations. The compatibility and interoperability of satellite navigation with the United States, Russia and the European Union, as well as the cooperation between the systems, have continued to deepen. It has successively entered many international organizations such as civil aviation, maritime affairs, search and rescue satellite, mobile communication, etc., and a number of international standards supporting Beidou system have been released. China Arab Beidou Cooperation Forum and China Central Asia Beidou cooperation forum were successfully held. The first overseas Beidou center was built in Tunisia, and the Algerian foundation strengthening network project was awarded. At the 9th ministerial meeting of the China Arab Cooperation Forum, China and Argentina agreed to continue to promote in-depth cooperation. At present, Beidou related products have been exported to more than 120 countries and regions, providing services to users above 100 million. The land mapping, precision agriculture, digital construction and smart port based on Beidou have been successfully applied in ASEAN, South Asia, Eastern Europe, West Asia and Africa.
4. Build integrated positioning and navigation time service system, continue to create in China
Adhering to the development concept of "China's Beidou, the world's Beidou, and the first-class Beidou", and vigorously carrying forward the Beidou spirit of "independent innovation, openness and integration, unity of mind and pursuit of excellence", a more ubiquitous, more integrated and more intelligent national integrated positioning and navigation time service system will be built by 2035, providing core support for future intelligent and unmanned development We will promote the upgrading of the system, integrate new technologies such as new generation communication and low orbit enhancement, vigorously develop new quality capabilities such as quantum navigation, full source navigation, micro pnt, and build a space-time information service infrastructure covering the sky, earth, sea, benchmark unification, high precision, high intelligence, high security and high efficiency. Serve the world and benefit mankind!
