Why is the accuracy of Beidou Heart off by 1 second every 3 million years?

Beidou Heart's accuracy is off by 1 second every 3 million years

The rubidium atomic clock is the "heart" of the Beidou satellite, determining the accuracy of positioning, speed measurement and timing functions. Back then, it took 18 months to deliver an imported rubidium clock. The R&D team worked day and night for 8 months and successfully delivered the rubidium clock. The first BeiDou-2 satellite was launched as scheduled!

Since then, domestically produced rubidium clocks have gradually replaced imported rubidium clocks, with an accuracy of one second every three million years.

BeiDou system has covered more than 200 countries and regions. Ministry of Foreign Affairs: Serving China and the world

At the regular meeting of the Ministry of Foreign Affairs on July 31, a question was asked: This morning, China's BeiDou-3 global satellite navigation system was officially launched. Some media believe that this is part of Beijing's efforts to enhance its high-tech influence overseas. What do you think of this?

Wang Wenbin said that today is a day that makes the Chinese people feel deeply proud and excited. This morning, President Xi Jinping attended the completion and opening ceremony of the BeiDou-3 global satellite navigation system, announcing the official opening of this global satellite navigation system independently built and operated by China, opening a new chapter in which the BeiDou system will provide high-quality services to the world and benefit mankind.

We often say that Beidou is not only China's Beidou, but also the world's Beidou. It not only serves China, but also the world. After the Beidou system is completed, it will provide basic navigation, global short message communication, international search and rescue and other services to global users. At present, Beidou system services have covered more than 200 countries and regions, with more than 100 million users and 200 million daily services. More than half of the countries in the world have begun to use the Beidou system.