What is the accuracy of BeiDou 3 satellite timing system? Introduction to BeiDou Timing System
What is the accuracy of BeiDou 3 satellite timing system? Introduction to BeiDou Timing System
Timing accuracy better than 20 nanoseconds
How many members are there in the Beidou-3 global satellite navigation system?
How many members are there in the Beidou-3 global satellite navigation system?
The BeiDou-3 global satellite navigation system has a total of 45 service satellites in orbit, including 15 BeiDou-2 satellites and 30 BeiDou-3 satellites, and the current BeiDou system operates continuously and stably, with a global horizontal positioning accuracy of about 1.52 meters and a vertical positioning accuracy of about 2.64 meters; the speed measurement accuracy is better than 0.1 m/sec, and the timing accuracy is better than 20 nanoseconds.
Transportation, hydrological monitoring, meteorological forecasting, power dispatching, disaster relief and mitigation, public safety, what system can span so many fields to become the protagonist? July 31 is exactly the protagonist's second birthday.
Detailed Showcase
July 31 marks the second anniversary of the launch of the Beidou-3 global satellite navigation system. Over the past two years, the BeiDou-3 system has operated stably and has been applied in more than 120 countries and regions around the world, providing services to more than 100 million users. Recently, in order to further optimize the global service performance of the BeiDou navigation system, the management team has carried out an in-orbit software upgrade of the BeiDou satellite system. How many satellites are there in the BeiDou-3 global satellite navigation system? How many services can it provide? What convenience can it bring to our daily life? What advantages will the software upgrade bring?
What are the advantages of the BeiDou short message communication function?
Having said that, what aspects of our daily life will use the Beidou system? Reporters yesterday (July 30) from the Beidou 3 short message communication service results conference learned that Beidou's unique short message communication function for the first time in the smartphone application, which also marks the short message communication service from the industry into a new stage of mass application.
Short message communication is a unique feature of the BeiDou system that distinguishes it from other global satellite navigation systems. Covering China and its neighboring countries and regions, the short message communication service is characterized by low cost, wide coverage, high reliability and on-demand access, and can effectively supplement the terrestrial mobile communication network to meet the needs of emergency communication, search and rescue and other services in areas without terrestrial network coverage.
Short message communication services play an active role in livelihood protection, disaster relief and mitigation, field search and rescue, as well as marine fisheries, transportation and border patrol.
Then Beidou short message communication function to realize the smartphone application, and will bring what kind of changes to the people's life?
Cell phones with BeiDou short message communication RF baseband integration chip, relying on the BeiDou system to send information, not only text, but also accurately marked the location where the information was sent.
Beidou satellite navigation system engineering chief designer Yang Changfeng, academician of the Chinese Academy of Engineering: you do not change (cell phone) card, you can take this phone to the place you want to go, you can keep in touch with some of the relevant aspects of the contact, so that in the event of danger, he can also be rescued in a timely manner.
What's the difference between rice transplanters fitted with a Beidou navigation system?
What other aspects of our daily lives benefit from Beidou's services? Let's take another look at the rice fields in Heilongjiang. During this year's spring plowing, Heilongjiang Reclamation District for 11,000 sets of agricultural machinery installed the latest Beidou navigation driving system, put into the spring plowing operation, let's see what is different about the spring plowing with the help of Beidou.
The reporter came to the 10th management area of the North Great Wilderness Group's Qianfeng Farm, where a rice transplanter equipped with the latest Beidou navigation and driving system was carrying out autonomous operations in the No. 2 field. The grower Feng Yujiang will carry the seedlings to the rice transplanter, and the rice transplanter will carry out precise rice-planting operations according to the pre-set trajectory.
Feng Yujiang, a grower in the tenth management area of the North Great Wilderness Group's Qianfeng Farm: With driverless navigation, this can save labor, the car can go by itself. I watered in the car to see the depth of the seedlings, especially save time and labor.
Feng Yujiang planted 320 acres of rice this year, the use of the installation of Beidou navigation driving system rice transplanter, the previous need for six people's work, now four people can be completed, and the operation is more accurate. This year, a total of 560 sets of rice transplanter installed this system in the front farm into the spring plowing.
Zhou Bingwen, deputy director of Agricultural Science and Technology Service Center of North Great Wilderness Group Fengfeng Farm: It can automatically plan and generate the operation path, truly realizing the rice transplanter driverless. Compared to manually driven rice transplanter, can accurately control the row spacing and plant spacing, so that the operational precision, straightness, standard is higher, the error is only about 2 centimeters.
How is the software upgrade progressing? What has changed since the upgrade?
As mentioned earlier, the management team carried out an in-orbit software upgrade of the BeiDou satellite system. This software upgrade is mainly aimed at enabling the BeiDou system to further reduce occasional failures, realize technical upgrades and enhance the stable operational performance and abnormality disposal capability of the satellite in orbit.
Xi'an Satellite Control and Measurement Center Engineer Li Wenshu: The software optimization and upgrading work involves most of the satellites in the whole system, with a total of more than a hundred configuration items, a large total number of tasks, a complex technical status involved in software optimization, a high timeliness requirement for upgrading test and validation, and a great difficulty in implementation.
In order to enhance the efficiency of software optimization, the scientific and technical personnel of the BeiDou Navigation Satellite Management Group have developed special software to realize the data review and comparison, and the operationalization of remote control commands. At present, the upgrading work is progressing smoothly, and the whole software upgrading task will continue for about three months in the future.
At present, the BeiDou-3 global satellite navigation BeiDou scale application has entered a key stage of marketization, industrialization and international development. Solutions based on the BeiDou system, such as land rights, precision agriculture and smart ports, have served the economic and social development of countries in Asia, Eastern Europe and Africa, and BeiDou products have been applied in more than half of the countries and regions in the world.
How big is our Beidou industrial system?
At present, how big is China's Beidou industrial system? In May this year, the China Satellite Navigation and Positioning Association released the White Paper on the Development of China's Satellite Navigation and Location Services Industry in 2022. The white paper shows that the overall output value of China's satellite navigation and location services industry reached RMB 469 billion in 2021, an increase of about 16.29% compared with 2020, and China has basically formed the Beidou industrial system. In the future, after the upgrade of the BeiDou satellite system is completed, it will serve every aspect of our life with more secure, stable and reliable performance.