Function and Significance of 30 Beidou-3 Satellites Entering Long Tube Mode

On June 23rd this year, the last Dou-3 satellite was launched successfully, which also established the international status of China's satellite industry. Recently, 30 Beidou-3 satellites have entered the long tube mode. Let's take a look at the role and significance with constellation knowledge!

30 Beidou-3 satellites entered the long tube mode.

It was learned from Xi 'an Satellite TT&C Center that the last global networking satellite 1 of Beidou-3 successfully entered the long-term operation and management mode. At this point, all 30 global networking satellites of Beidou-3 have entered the long-term management mode, and China Beidou has taken a key step towards serving the world.

At present, TT&C Center of Xi 'an Satellite is actively carrying out the on-orbit test of the platform and inter-satellite link, making a final sprint for early access to the inter-satellite link system and providing network navigation services.

It is understood that on the basis of years of management of Beidou navigation satellite, this center has continuously improved its satellite diagnosis knowledge, established a complete satellite fault handling plan in advance, and developed automatic generation software for remote control operation according to satellite characteristics. Just fill in the remote control instruction and telemetry standard in a specific program, and the instruction block can be generated with one key, which makes satellite management more convenient, scientific and efficient.

At the same time, in order to realize the smooth transition from Beidou-2 to Beidou-3 system, facing the limited geosynchronous orbit resources, the center has successively controlled the orbits of several Beidou-2 satellites, ensured the orbital position of Beidou-3 satellites, effectively ensured that the user service was not affected, and achieved seamless connection.

On June 23rd, the last global networking satellite of Beidou-3 was launched from xichang satellite launch center. On June 30, it was successfully fixed in a geosynchronous orbit 36,000 kilometers away from the Earth.

Function and significance

With the launch of the last networking satellite of Beidou-3 system, the deployment of Beidou-3 global constellation has been fully completed. Beidou can be widely used in mobile navigation, smart city, modern agriculture, disaster warning, emergency rescue and other production and life fields by providing all-weather, all-day and high-precision positioning, navigation and timing services. It is a "clairvoyance" to ensure the safety of people's livelihood.

What will it bring to production and life?

1. Positioning is more accurate

Accurate single-point positioning is Beidou's characteristic high-precision service. Beidou can provide static centimeter-level and dynamic decimeter-level high-precision positioning. The speed measurement accuracy is 0.2 m/s, and civil users can get 10 m positioning service and 0.2 m/s speed measurement service for free, and paying users can get higher accuracy and grade service.

2. Timing is more accurate

Timing service is one of the basic services of Beidou. Using Beidou satellite for time calibration can avoid the error between clocks and unify the time. In the global scope, the timing accuracy of Beidou is better than 20 nanoseconds, and it is better than 10 nanoseconds in the Asia-Pacific region. Beidou's time service function is very important in fields such as finance and electric power that need accurate time calibration.

3. SMS communication is more perfect.

Short message communication is the exclusive secret of Beidou. When there is no cell phone signal at sea or communication is blocked in case of disaster, you can send short messages through Beidou terminal to get in touch with the outside world. Beidou-3' s short message communication ability has been significantly improved, and its information sending ability has been improved from once 120 Chinese characters to once 1200 Chinese characters, and it can also send pictures and other information. At present, more than 70,000 fishing boats and marine law enforcement vessels in China have installed Beidou special communication terminals, and ships in distress can call for help through Beidou short message communication.

4. Mobile phones are more widely used.

Smart phone application is one of the most important application fields of Beidou. At present, mainstream chip manufacturers at home and abroad have introduced integrated chips compatible with Beidou. In China, more than 70% of connected smartphones can provide Beidou service. At the end of last year, a 22nm RF baseband integrated navigation and positioning chip supporting the new Beidou-3 signal was released, which has lower power consumption and higher accuracy. The chip is almost invisible, but it can provide very high quality service.

5. Modern agriculture is more efficient.

Beidou navigation system has been widely used in many fields, such as wheat harvesting, stubble cleaning, subsoiling, UAV plant protection and so on. Agricultural machinery can obtain the position information of Beidou navigation system through the built-in positioning board. After setting the working path, even if there is no agricultural manipulator in the cab, the vehicle can still go straight ahead and work accurately. The unmanned agricultural machinery served by Beidou can not only improve the operation efficiency and quality, but also bring some operation processes into the supervision platform.

6. Disaster warning is more timely.

Through the short message and position report function of Beidou system, disaster early warning and quick report, disaster relief command and dispatch, rapid emergency communication and so on can be realized, and the response speed and decision-making ability of disaster emergency rescue can be improved. For example, the forestry management department can use Beidou to carry out forest resources inventory, forest land management and inspection, and carry out forest area measurement, timber quantity estimation, forest patrol, forest fire prevention, regional boundary determination and other applications to reduce management costs and improve work efficiency.

7. Intelligent transportation is safer

The advantage of satellite positioning technology lies in its wide coverage, but there will be some deviation in positioning accuracy indoors or in places covered by buildings. Beidou +5G technology can realize the integration of navigation and communication, which can be seamlessly and accurately positioned both outdoors and indoors, and soon find a parking space or direction. Beidou +5G can provide intelligent and trusted navigation service based on precise time and space. Coupled with artificial intelligence, in the future, smart cities based on 5G technology will have safer and more harmonious traffic.

8. International cooperation is more extensive.

As a member of the International Telecommunication Union, China Beidou has compatible and cooperative relations with American GPS, European Galileo and Russian GLONASS. Beidou satellite navigation system can provide quality services for people all over the world. Entering a new era of global service, Beidou's "circle of friends" that can provide global time and space services is constantly expanding. Domestic Beidou basic products have been exported to 120 countries and regions, and land ownership, digital construction and smart ports based on Beidou have been successfully applied in ASEAN, South Asia, Eastern Europe, West Asia and Africa.