European Space Agency released photos of space waste computers
Special reporter of this newspaper Zhang Yichi reporter Liu Yang
Photo caption: Space debris computer synthesis photo released by European Space Agency
“China is one of the world’s largest manufacturers of space waste. If China tries to find ways to remove these wastes, China may be planning to deploy space-based weapons to the orbit.†Although not all Americans’ views on China’s space activities, It is the eyes of some Western media who look at China's space activities. The "Newsweek" website recently reported Chinese scholars' idea of ​​using giant space-based lasers to remove space debris. However, it has ulterior motives to say that outsiders fear that China will deploy weapons in space. Chinese experts said that the use of space-based lasers to remove space debris is currently a hot topic in the world. There are many institutions in China that have conducted theoretical explorations, but they have nothing to do with space-based weapons.
China plans to build a space-based laser station?
On the 16th of the “Newsweek†website titled “China plans to destroy space debris with a giant laserâ€, Chinese scientists have a bold proposal to use giant lasers to clean up messy space orbits and remove abandoned satellites and other space debris. . The report said that a paper published by a military university researcher in China entitled “The Effect of Space-Based Laser Stations on Clearing the Impact of Small-Diagram Space Debris on Orbital Elements†describes how to use space-based lasers to irradiate space debris to smaller ones. Less harmful debris.
The article stated that space debris has been plaguing international space agencies for many years and NASA considers multiple methods to track, detect and remove man-made space debris. Other methods of cleaning up space debris include giant nets that are used to remove and collect space debris, and magnets that can be used to suck them away from orbit. According to the article, the above-mentioned Chinese researchers simulated the laser station and concluded that it would be an effective method for cleaning the track. The abstract of the paper mentions: "(Simulation) provides the necessary theoretical basis for the deployment of space-based laser stations and the use of space-based lasers for the elimination of space debris."
Chinese space expert Pang Zhihao told the Global Times reporter that according to the size of space debris, international space debris is divided into three categories: First, large debris with a size greater than 10 centimeters, and now there are more than 20,000 pieces that can be monitored. Second, small pieces with a size between 1-10 cm are now more than 100,000 pieces. Third, there are tiny pieces with sizes between 1 mm and 1 cm. There are now about 370,000 pieces. Fragments up to 1 mm in size now have tens of millions of pieces.
Implicating China's deployment of space-based weapons
Chinese scholars studying the issue of space-based lasers to eradicate orbital rubbish were originally a good thing for the benefit of mankind. However, when American media articles made a move, they started accusing China. According to the article, China is one of the most serious "criminals" in the production of space debris. Only one anti-satellite test in 2007 produced thousands of dangerous debris.
Not only that, the article also seems to imply that the purpose of China's research on the space-based laser station is impure. According to reports, some people expressed concern about China’s intention to destroy orbiting satellites. The warning issued last year by the United States was that this superpower is building space weapons to “challenge the balance of world powerâ€. In March last year, John Hayden, commander of the US Strategic Command, told CNN: "They have been making weapons for space operations, including interfering with weapons and laser weapons, and they are not keeping this secret. They are building these capabilities. To challenge the United States and its allies ... we cannot allow such things to happen."
Laser clearing orbit rubbish is an international hotspot
According to Pang Zhihao, at present, due to increasing space debris, it poses an increasing threat to the safe operation of on-orbit spacecraft. The International Space Station conducts multiple evasion flights each year. Therefore, the development of technologies to actively remove space debris is increasing. More attention has been paid to such items as electric tethers, salvage nets, lasers, “harpoonsâ€, sails, and robotic arms. They are designed to capture space debris and pull it back into the Earth's atmosphere where it burns and decomposes.
Another Chinese expert told the Global Times reporter that the elimination of space debris by space-based lasers is an international research hotspot. Theoretical research is being conducted at home and abroad. The laser radiation method is one of the most promising methods for removing small-size space debris at home and abroad, and is also the focus of current research. The technical principle is not simply ablation. Instead, laser irradiation causes the debris to generate recoil impulses and decelerate the orbit until the debris enters the atmosphere and burns.
A survey by the Global Times reporter found that the U.S. science and technology website reported in April 2015 that an international team of scientists proposed a space-based system to solve the increasingly serious problem of space debris. The researchers published an article suggesting that the EUSO ultra-wide-angle field-of-view telescope developed by a Japanese team would be used to detect targets and then using the recently developed high-efficiency laser system CAN laser to track and remove space debris from the orbit. According to reports, using these two tools, it is possible to track and remove dangerous space debris of about 1 cm in size. The team plans to deploy a small proof-of-concept experiment on the International Space Station. If successful, a full-size model, 3-meter-diameter telescope and high-power laser will be installed on the International Space Station in the future to de-orbit the space debris within 100 kilometers. .
Experts said that there are many domestic organizations that conduct related research. The Chinese papers mentioned by the American media are actually limited to theoretical research, and related articles do not mention the "giant lasers" as eye-catching. Experts said that both the United States and the Soviet Union have conducted many anti-satellite tests and produced a lot of space debris. It is obviously ulterior motive for the American media to take China’s account alone. China is now committed to space debris cleanup technology and has been alluded to deploying space weapons. This again proves that some people in the United States have double standards for China's space activities. ▲
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