What is the accuracy of the Beidou-3 satellite timing system

How many members are there in the Beidou-3 global Satellite navigation?
 

The Beidou-3 global Satellite navigation has 45 in orbit service satellites, including 15 Beidou-2 satellites and 30 Beidou-3 satellites. At present, the Beidou-3 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 meters/second, and the timing accuracy is better than 20 nanoseconds.

What system can cross so many fields as transportation, hydrological monitoring, meteorological forecasting, power dispatch, disaster relief and disaster reduction, and public safety, and become the leading role that cannot be ignored? July 31st happens to be the protagonist's 2nd birthday.

 

Having said so much, what specific aspects of our people's daily lives will use the Beidou system? Yesterday (July 30th), the reporter learned from the Beidou-3 short message communication service achievement press conference that Beidou's unique short message communication function has been implemented for the first time on smartphones, marking a new stage of short message communication services from industry applications to mass applications.

Short message communication is a unique service that distinguishes Beidou from other global Satellite navigation. Short message communication services cover China and surrounding countries and regions, with characteristics such as low cost, wide coverage, high reliability, and random access. They can effectively supplement ground mobile communication networks to meet the needs of emergency communication, search and rescue services in areas without ground network coverage.

Short message communication services play a positive role in ensuring people's livelihoods, disaster relief, field search and rescue, as well as marine fisheries, transportation, border patrol, and other aspects.

So what changes will the Beidou short message communication function bring to people's lives after implementing smart phone applications?

A mobile phone with a BeiDou short message communication RF baseband integrated chip, relying on the information sent by the BeiDou system, not only has text, but also accurately calibrates the location where the information is sent.

Yang Changfeng, Chief Designer of the BeiDou Project, CAE Member: If you don't change your (mobile phone) card, you can take this mobile phone to the place you want to go, and you can keep in touch with relevant aspects, so that in case of danger, he can also be rescued in time.

What is the difference between Rice transplanter installed with Beidou navigation system?

What other aspects of our daily lives benefit from Beidou's services? Let's take a look at the rice fields in Heilongjiang again. During this year's spring plowing period, the Heilongjiang reclamation area installed the latest BeiDou navigation and driving system for 11000 agricultural machinery, and put it into spring plowing operations. Let's take a look at how spring plowing with BeiDou assistance is different.

When the reporter came to the tenth management area of Qianfeng Farm of Beidahuang Group, a Rice transplanter equipped with the latest Beidou navigation and driving system was operating independently in No. 2. The planter Feng Yujiang will transport the seedlings to the Rice transplanter, and the Rice transplanter will carry out accurate rice transplants according to the preset track.

Feng Yujiang, a planter in the 10th management area of Qianfeng Farm of Beidahuang Group, said: With unmanned navigation, it can save labor and drive on its own. I water the car and check the depth of the seedlings, which is very time and effort saving.

Feng Yujiang planted 320 mu of rice this year. Using the Rice transplanter with the Beidou navigation driving system, it used to take six people to do the work, but now four people can do it, and the work is more accurate. This year, a total of 560 Rice transplanter equipped with this system were put into spring ploughing in Qianfeng Farm.

Zhou Bingwen, Deputy Director of Agricultural Science and Technology Service Center of Qianfeng Farm of Beidahuang Group, said that it can automatically plan and generate operation paths, which truly realizes the unmanned driving of Rice transplanter. Compared with the manually driven Rice transplanter, it can accurately control the row spacing and plant spacing, so that the operation accuracy, straightness and standard are higher, and the error is only about 2 cm.

How is the software upgrade progressing? What changes have occurred after the upgrade?

As mentioned earlier, the management team conducted in orbit software upgrades for the Beidou satellite system. The main purpose of this software upgrade is to further reduce occasional faults in the Beidou system, achieve technological upgrades, and improve the stable operation performance and abnormal handling ability of satellites in orbit.

Li Wenshu, an engineer at Xi'an Satellite Measurement and Control Center, said that the software optimization and upgrade work involves most of the satellites in the entire system, with a total of over 100 configuration items and a large task amount. The software optimization involves complex technical states, high requirements for timeliness in upgrade testing and verification, and high implementation difficulties.

In order to improve the efficiency of software optimization, the scientific and technological personnel of the Beidou Navigation Satellite Management Group have developed specialized software to achieve data review and comparison, and operational remote control instructions. At present, the upgrade work is progressing smoothly, and the entire software upgrade task will continue for about three months in the future.

At present, the large-scale application of Beidou-3 global satellite navigation Beidou has entered a Key Stage of marketization, industrialization and internationalization. Solutions such as land ownership confirmation, Precision agriculture and Smart port based on the Beidou system 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 China's Beidou industrial system?

At present, how large is China's Beidou industrial system? In May this year, the China Satellite Navigation and Positioning Association released the "2022 White Paper on the Development of China's Satellite Navigation and Location Services Industry". The white paper shows that the overall output value of China's satellite navigation and location service industry reached 469 billion yuan in 2021, an increase of approximately 16.29% compared to 2020, and China has basically formed a Beidou industrial system. In the future, after the upgrade of the Beidou satellite system is completed, it will serve all aspects of our lives with safer, more stable, and more reliable performance.