Long March 3B Rocket Successfully Launches Tiantong-1 02 Satellite

Long March 3B lifts off from Xichang Satellite Launch Center. (Credit: China Aerospace Science and Technology Group)

BEIJING (China Aerospace Science and Technology Group PR) — At 23:59 on November 12th, China successfully launched the Tiantong-1 02 satellite from the Xichang Satellite Launch Center using the Long March 3B carrier rocket. The satellite entered the scheduled orbit and the launch mission was a complete success.

The launch of the Tiantong-1 02 satellite was developed by the Fifth Academy of China Aerospace Science and Technology Corporation, and is an important part of the Tiantong-1 satellite mobile communication system.

The system is composed of space segment, ground segment and user terminal. After the Tiantong-1 02 enters orbit, it will be networked and operated with the Tiantong-1 01 satellite to form a space segment.

During its orbiting period, the Tiantong-1 02 satellite will expand the coverage of countries in the “Belt and Road” region on the basis of covering China’s land (including maritime).

The Tiantong-1 satellite is a satellite mobile communication system independently developed and constructed by China, and it is also an important part of the country’s space information infrastructure.

On August 6, 2016, the Tiantong-1 01 satellite developed by the Communications Satellite Division of the Fifth Academy was successfully launched. This is the first satellite of China’s country’s satellite mobile communications system and is also known as the “Chinese version of maritime satellite”, marking China’s entry into an the era of satellite mobile communication phones. The satellite has been in a stable orbit for four years.

After pilot application and review, on December 18, 2019, the Ministry of Industry and Information Technology approved the official commercial use of China Telecom’s Tiantong business. China Telecom has now launched the “1740” Tiantong dedicated number segment to provide stable and reliable voice, SMS, traffic and related value-added services. There are many Tiantong dedicated voice terminals and data terminals on the market.

Bian Bingxiu, the commander-in-chief of the Tiantong-1 02 satellite for the Fifth Academy of Aerospace Science and Technology Group, introduced that the Tiantong-1 02 is the second of the series of Tiantong 1 satellites, with a design life of 12 years, and the satellite fully inherits the technical status of the 01 star. The satellite platform and payload were further optimized and designed according to usage requirements, which enhanced the flexibility of the 02 satellite.

Tiantong-1 02 will serve the construction of the “One Belt One Road”, providing all-weather, all-day, stable and reliable mobile communication services for users in China and surrounding areas, the Middle East, Africa and other related regions, as well as most of the Pacific and Indian Oceans, and support voice , SMS and data services.

As the demand for mobile satellite services develops, international mobile satellite systems have formed multiple global or regional mobile communication systems, including the Iridium satellite system, the Celaya system and the International Mobile Communication Satellite System. In China, the Tiantong-1 satellite mobile communication system has been widely used.

According to Chen Mingzhang, chief designer of Tiantong-1 02, the satellite mobile communication system mainly provides diversified medium and low rate communication services for miniaturized mobile terminals (including ground personal mobile terminals, vehicle terminals, airborne terminals, and shipborne terminals). .

Compared with terrestrial mobile communication systems, satellite mobile communication has a wide coverage area and good environmental adaptability. It can achieve almost seamless coverage in areas such as oceans, mountains and plateaus, and meets the needs of various users for mobile communication coverage. It is important Civil and commercial value.

According to the survey and statistics of relevant departments, the demand for various satellite mobile terminal users in China will exceed three million by 2025. The users will cover personal communications, marine transportation, ocean fishing, air passenger transportation, bipolar scientific research and international peacekeeping.

In the future, the Tiantong-1 02 and Tiantong-1 01 satellites and subsequent planned satellites will further enhance the satellite mobile communication service capacity, system reliability and regional coverage capabilities, forming a satellite-ground integrated regional mobile communication system , To provide stable satellite mobile communication services for aviation and navigation routes in the countries along the “Belt and Road”.

The Long March 3B carrier rocket for this launch mission was developed by the First Academy of Aerospace Science and Technology Group. The rocket for this mission has been optimized and improved. The integral forming technology of the combustion agent tank was used in the flight mission to optimize the engine pre-cooling program. The effect is verified, and the reliability and safety are further improved.

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