Technology

Why does China focus on developing low-altitude orbital satellite beams?


According to a frequency spectrum allocation filing submitted by China to the International Telecommunication Union (ITU) last September revealed plans to build two low-range orbital satellite beams (LEO) with a total of 12,992 satellites. crystal.

Accordingly, this project called “Guowang” will include low-range satellite beams operating at an altitude of 500 km – 1,145 km above the ground and tilted from 30 to 85 degrees. Satellites will operate on many different frequency bands.

Satellite coverage illustration for telecommunications services

Recent revelations by senior Chinese officials indicate that the project’s implementation plans are being accelerated.

“We are planning and developing satellite internet,” said Bao Weimin, a senior official of China Aerospace Science and Technology Corporation (CASC), China’s main space contractor. is based on space and has launched an experimental satellite ”.

Meanwhile, Ge Yujun, President of China Spacesat, a subsidiary of CASC, added that the relevant agencies are working on a master plan for the construction of a low-range satellite cluster called Hongyan and Hongyun.

Both of these satellite clusters, announced around 2018, include hundreds of satellites operating in low-Earth orbit.

Several satellites have also been launched into space to verify the technology. CASC plans to launch 60 satellites in the original Hongyan satellite cluster in orbit by 2022.

It is not clear how this satellite beam project will proceed but the development Satellite Internet has become the Chinese government’s priority.

China’s National Development and Reform Commission (NDRC) added the category of “satellite Internet” to the list of “new infrastructure” in April 2020.

China’s 14th Five-Year Plan recently approved for the period 2021-2026 and goals through 2035 have also required the construction of an integrated communication network, Earth observation, and satellite navigation. Street.

China built the Beidou navigation and navigation system. The country is also deploying Gaofen satellites for the High Resolution Earth Observation System (CHEOS).

With the rapid development of low-range satellite beams by companies such as SpaceX and OneWeb in the past, along with plans to deploy satellite beams of Amazon, Telesat and China in the near future, requires International organizations should take the necessary measures to coordinate their activities to avoid possible collisions.

In addition, the proposed and developed large satellite clusters have raised concerns about an increased risk of debris in space. The growing number of low-range satellites is also a threat to astronomical research and observations.

Phan Van Hoa(According to Spacenews)

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