In practice, the 13th communication satellite was successfully launched, and the speed of the high-speed rail of the aircraft will be greatly improved. It can connect the world to all kinds of transport passengers. It takes less than one minute to download 1G movies; it is planned to be used on airplanes and high-speed rails for three years.
Yesterday, China’s first high-throughput communication satellite practice was successfully launched on the 13th. The total capacity of the 13th communication is more than 20Gbps, which exceeds the sum of the capacity of all communication satellites developed in China.
According to reports, the implementation of the 13th satellite can achieve seamless "moving in the middle" (referring to the satellite communication guarantee of mobile carriers such as vehicles, ships, aircrafts, etc.), which can be used for aviation, shipping, railway and other vehicles. The passengers connected to the world to completely improve the online experience.
On the 13th, the first application of Ka-band multi-beam broadband communication system on China's satellites, the total communication capacity exceeds 20Gbps (transmission rate unit, commonly called "bandwidth"), user terminals can easily and quickly access the network, download and return The transmission rate is up to 150Mbps and 12Mbps respectively, which realizes the broadband application of satellite communication in the true sense and fills the technical gap in this field in China.
"This speed downloads 1G movies, it takes less than 1 minute." According to Zhou Zhicheng, the general commander of the 13th satellite system, the practice of the 13th satellite has also created a number of "firsts" in the domestic high-orbit satellite field: the first time in China The use of electric propulsion on high-orbit satellites (without the consumption of chemical propellants) completes the north-south mission during the whole life period. Compared with chemical propulsion, “less carrying a lot of chemical fuelsâ€, the satellite carrying capacity is significantly improved; for the first time on China’s high-altitude satellites. It is equipped with a laser communication system; for the first time, 100% engineering application of domestically produced products on China's high-rail long-life communication satellite has changed the long-term dependence on imports of related products.
Zhao Jian, deputy director of the Department of Systems Engineering of the National Defense Science and Technology Bureau, said that China has formed a satellite communication technology service system for fixed communication broadcasting, mobile communication and data relay, and 16 satellites in the orbital (commercial) communication satellite. A total of 273, built a satellite monitoring and control and business monitoring network interconnected by Beijing, Hong Kong and Kashgar, and built a satellite telecom port connecting South Asia, Africa, Europe and the Americas, basically forming a global satellite communication service capability.
Related reading: China plans to launch the 13th satellite in April, the first high-throughput communication satellite
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How can the practice number 13 help you in the air?
Adopting the concept of heaven and earth integration, it can provide high-speed “moving in the middleâ€
In the Internet age, people need the network anytime, anywhere. It is a desire of many people to surf the Internet when flying. With the launch of the 13th satellite, this desire has been realized.
Thoroughly improve the online experience
According to statistics, the average daily number of passengers in China exceeds 1.2 million, and the average daily passenger traffic of the railway reaches 7.6 million. However, the passengers' Internet experience is very poor: the aircraft cabin cannot access the Internet, and the mobile phone signal on the high-speed train is intermittent. After the cruise ship leaves the port, it becomes an information island. The demand for passengers to access the Internet anytime and anywhere is not satisfied for a long time.
Liu Fang, the chief engineer of the 13th satellite engineering, said, "These problems are due to the inability of the ground mobile network to achieve full coverage, or even coverage, but across different areas, resulting in too frequent switching, it is difficult to provide services for high-speed vehicles."
According to him, the practice of the 13th satellite adopts the concept of heaven and earth integration. One of the important services is to provide high-speed “moving in the middleâ€, which can be seamlessly switched by multiple beams to match the automatic tracking and capturing function of airborne, vehicle or shipborne terminals. It can connect the world to passengers in all kinds of transportation such as aviation, shipping and railway, and completely improve the online experience.
Handheld terminal is small and easy to carry
Zhao Jian said that China had previously lacked satellite mobile communication services, and the means of communication for aircraft, ocean-going vessels and fishermen were seriously inadequate. They relied mainly on foreign services for a long time. Now with the development of China's satellite communication technology, this passive situation is gradually changing.
Zhao Jian said, "I know that everyone is eager to get online and communicate on the plane. Now it has been conducting experiments on airborne and on-board, and the technology has been broken. It is planned to use the aircraft and high-speed rail for three years."
According to him, in China, the satellite communication service industry has developed rapidly. More than 70 million users of national direct broadcast satellites have been opened. The "airborne satellite live broadcast and television reception and service system" is expected to be deployed in 2,400 domestic passenger planes within three years. It can be promoted and used in ships and high-speed rails.
According to Liu Fang, the user terminal of the 13th satellite is small, effectively reducing the size of the user terminal antenna, and is very portable. After the tourists or the affected people are equipped with such user terminals, they can establish voice, data and video transmissions with the satellites at any time, and pass the situation on the way or in the disaster area for the first time, providing communication guarantee for the rescue and minimizing losses.
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