Today (23rd) China launched the last global networking satellite of Beidou-3, when the global constellation deployment of Beidou-3 will be officially completed. In the past 30 years, the Beidou people have built a satellite navigation system that is fully self-controllable, first-class in technology, and serves the world. At the beginning of the design, the Beidou system used many original designs that were different from other countries' navigation systems, such as satellite orbit layout, information transmission, etc. From the technical route to the R&D and production model, it came out with an independent and unique Chinese characteristic. Road to the development of satellite navigation systems.
There are currently four major satellite navigation systems in the world, namely GPS in the United States, "Glonas" in Russia, "Beidou" in China, and "Galileo" in Europe. Unlike other systems consisting of single-orbit satellites, Beidou not only has medium-circular orbit satellites, that is, MEO stars, but also high-orbit geostationary orbit satellites, that is, GEO stars, and earth tilted orbit satellites, IGSO stars.
Wang Ping, chief designer of the Beidou-3 satellite of the China Academy of Aerospace Science and Technology: The hybrid constellation composed of three orbits can not only extend the scope of our national navigation service to the world, but also pass GEO (geostatic satellite) and IGSO (Earth Inclined Orbit Satellite) provides better and higher quality navigation and positioning services in China and surrounding areas, and can also provide some diversified special services.