Comprehensive and successful completion of Beidou 3 satellite navigation signals
The 2017 Shanghai International Navigation Industry and Science and Technology Development Forum was held in Shanghai on October 27, which was themed: “Integration•leading—high-precision positioning and navigation”. The forum brought together well-known experts and scholars in the industry and business representatives. Participants centered on the mass application of high-precision positioning navigation and other topics, launched a warm thematic exchanges and discussions on common technologies, with a view to promoting in-depth cooperation among industry, academia, research and application, and promoting technological innovation and cross-border integration in the satellite navigation industry.
With “5G/GNSS high-precision positioning and spatial data depth application” as the theme. Emphasized the important position and significance of satellite navigation signals in system construction, application promotion and industrialization.
It talked about the terminal products of satellite navigation, such as chips, modules, boards, complete machines, etc.; it also talked about various applications of satellite navigation, such as high-precision positioning, intelligent navigation, accurate timing and so on. On talking about the signal of satellite navigation system. In fact, although the satellite navigation signal is invisible and untouchable, it is very important. To summarize, we can say this: satellite navigation signal is the core technology of satellite navigation system, which is listed as one of the three core technologies of Beidou 3 in our country, and is not only an important part of satellite navigation system, but also the key to the promotion and industrialization of satellite navigation applications. In fact, whether it is the construction of the system, or the development of terminal products, or a variety of applications, are essentially centered around the satellite navigation signal. The reason is simple, because satellite navigation system is an information system, the signal is the carrier of information, and its core is of course the signal.
From the early 1990s when Beidou 1 was launched to the present, China's Beidou satellite navigation system has gone through more than 20 years of development. According to the three-step development plan, it has gone through the two stages of BeiDou-1 and BeiDou-2, and is now developing towards BeiDou-3. From the user's perspective, we can find that the development history from BeiDou 1, BeiDou 2 to BeiDou 3 is actually the evolution history of BeiDou satellite navigation signals.
In the deployment of BeiDou III on September 5, 2017, the official website of BeiDou released a news article of less than 200 words, attached to an 80-page document, which is the "BeiDou Satellite Navigation System Space Signal Interface Control Document Open Service Signal B1C, B2a (Test Version)". Although the release of this ICD is unusually low-key, it is an important milestone in the history of the development of the BeiDou satellite navigation system, which not only unveils the official deployment of the BeiDou-3 system, but also finally unveils the BeiDou-3 navigation signals.
What is even more gratifying is that the complete success of the Beidou-3 navigation system, which we Chinese scientists are deploying to full completion in June 2020, today, after more than two decades of research, is both perfect and worthy of national pride. And it is completely assured in terms of credibility and reliability. Its technical performance is also ahead of the American GPS/Russian GLONASS/European Galileo GALILEO.
