At 23:59 on November 12, 2020, China used the Long March 3B carrier rocket at the Xichang Satellite Launch Center to successfully put the Tiantong One 02 satellite into the scheduled orbit, and the launch mission was a complete success.

The Tiantong-1 02 satellite was developed by the China Academy of Space Technology. After being launched into orbit, it will form an integrated world-earth mobile communication network with the ground mobile communication system. Users in most waters of the Indian Ocean provide mobile communication services such as all-weather, all-day, stable and reliable voice, short message and data.

This mission is the 352th flight of the Long March series of carrier rockets.

2. What is Tiantong No. 1?

The Tiantong-1 satellite mobile communication system is a satellite mobile communication system independently developed and constructed by China, and it is also an important part of China's space information infrastructure. The system is composed of a space segment, a ground segment and user terminals. The space segment is planned to be composed of multiple geosynchronous orbit mobile communication satellites. With the characteristics of wide-area coverage and all-weather communication, it has realized the domestic research and development and production of satellites, chips, terminals, and customs stations, ensuring the communication security of users, getting rid of the long-term dependence on foreign satellite mobile communication services, and filling the domestic independence The blank of satellite mobile communication system. Each geosynchronous orbit satellite used by China can cover about one-third of the earth's area, and three can cover the entire earth's area. We look forward to the early completion of the Tiantong-1 satellite mobile global communication system.

3. When was Tiantong-1 01 launched?

At 00:22 on August 6, 2016, China successfully launched the Tiantong-1 01 satellite using the Long March 3B carrier rocket at the Xichang Satellite Launch Center.

Tiantong-1 01 is my country’s first mobile communications satellite and is also known as the "Chinese version of maritime satellite." Its successful launch marks China’s entry into the mobile phone era of satellite mobile communications, filling the domestic gap and realizing astronauts The long-cherished wish for more than 30 years is an important milestone.

According to reports, the Tiantong-1 satellite is based on my country's mature Dongfanghong-4 satellite platform. At the technical level, it marks that my country has broken the foreign technology blockade and entered the geosynchronous orbit mobile communication satellite club. In addition to the international mobile communication satellite system and the Iridium satellite system, there is a satellite mobile communication system with independent intellectual property rights by the Chinese. ; It indicates that my country has entered the international leading ranks in the development and application of new payloads and large platforms. At the same time, it also shows that China has reached a high technical level in the field of satellite design and manufacturing capabilities, platform technology, payload technology, basic components, raw materials, and ground simulation experiments. Editor/Xu Shengpeng