What are the results of my country's first solar "photographer"?

Xinhua News Agency, Beijing, August 30th: What are the results of my country's first solar exclusive "photographer" - "Xihe" have achieved?

Xinhua News Agency reporters Hu Yan, Chen Xiyuan, Song Chen

"Improved Xun and Yu Tianma, as ambitious in Changkong Muqun Star", my country's first solar detection science and technology test satellite "Xihe" has been successfully launched. On August 30, the results of the results of the "Hohe" results were held in Beijing. What are the important achievements of "Hehe"? What does it mean? The reporter interviewed relevant experts.

For the first time in the world to do "CT" for the low -level solar, "CT"

The sun is the most important environmental impact factor for human civilization and economic and social development, and is the source of all things. The sun is the largest celestial body in the solar system and is the most closely related to the human relationship with the earth. The role of the sun on the evolution of the earth and the development of human civilization is indispensable.

At the same time, the influence of the sun on the earth is omnipresent. Human beings have established the ground solar monitoring network, but because the earth's atmosphere is opaque to electromagnetic waves such as ultraviolet, X -ray, gamma rays, the visible light wave bands on the ground will also be affected by factors such as the atmosphere of the earth's atmosphere, disturbance and rainy weather. Planetary plasma and magnetic field information must go to the deep space.

Zhao Jian, director of high -scoring special designers and deputy general chiefs, and director of the major special project center of the National Defense Science and Technology Bureau, introduced that in the past year, the National Aerospace Administration has organized engineering task teams such as aerospace technology groups and Nanjing University to carry out the super high -point accuracy accuracy of satellite platform The ultra -high stability technical test has more than 300 times, and the solar spectrum imaging more than 1,000 times. It has successfully completed the "Jihe" in the rail testing and testing work, and has achieved important scientific research results, including 5 international first results.

"For the first time in the world, we have achieved the spectrum scanning of the solar Hα band in the space, and recorded the response process of solar activities in the optical ball layer and color ball layer." Zhao Jian told reporters that through a scan, "Xihehe" The solar images of 376 wavelengths can be obtained, and different wavelengths correspond to the solar atmosphere at different levels of light and color balls.

Zhao Jian said that for solar physics research, the Hα spectrum is very important. "Because it is the strongest spectrum line in the low -level solar atmosphere of the solar activity. To detect this spectrum, you can also obtain the activity information of the optical ball layer and color ball at the same time, which greatly improves our physical mechanism for the solar explosion. Cognition. "

It is reported that the resolution of the "Hehe" uses the Hα imaging spectrometer has increased by about 10 times compared to the ground filter to reach the international advanced level.

Ding Mingde, chief scientist of the satellite satellite and professor of Nanjing University, said that "Xiehe" has obtained the Sun Hα spectrum, SI I and Fei spectrum internationally on the orbit on the orbit. Help scientists calculate the temperature, density, and speed of the solar atmosphere, study the solar atmospheric structure more in depth, understand the cause of the trigger and dissemination process of the solar explosion activities, so as to better carry out space weather forecast and ensure the safety of human life.

Ding Mingde introduced that the satellite scientific data of "Jihe" has been opened to the world, and can be inquired and downloaded through the Nanjing University Sun Science Data Center. At present, it has been widely used by solar physics researchers such as the United States, France, and Germany.

Space "magnetic suspension", allowing the photo to be accurate and stable

As a "photographer", the camera must be accurate and stable. For the first time in the world, "Hehe" adopted a non -contact magnetic floating satellite platform based on the concept of "static isolation and the collaboration of the main and consuming".

Chen Jianxin, chief commander of the Eighth Hospital of Aerospace Science and Technology Group, introduced that traditional satellites use the design method of fixed connection between platform compartment and load compartment. The cabin affects the quality of camera observation. "Hehe" adopts a new method of "dynamic and static isolation and non -contact", which isolate the platform compartment from physical isolation from the load compartment, which effectively isolates the interference of the satellite platform. Camera points to accuracy and stability indicators from traditional satellites to increase by one to two.

At the same time, in order to realize the energy supply of the platform compartment to the load compartment and the information transmission between the two cabins, the "Hehe" has also verified a number of new technologies such as wireless energy transmission, laser communication, and wireless communication. In the future, the new platform will also be applied to a new generation of aerospace tasks such as spatial astronomical detection and high -resolution on -ground inspections to effectively complete high -precision observations.

Space speed measurement new solution

How can satellites fly in vast space, how to accurately obtain their own position and speed? Zhao Jian told reporters that compared with near -ground space tasks, deep space detection tasks can only rely on traditional radio ranging and speed measurement methods due to the lack of the auxiliary of navigation satellites. However, the accuracy of radio navigation will decrease significantly with the increase of satellite flight distance. This time the "Hehe" is equipped with an atomic frequency solar speed measuring navigator, trying to overcome this difficulty.

Satellites move in space. When the light emitted by the sun reaches the satellite, the frequency changes will occur, that is, Doppler frequency movement, frequent shift size is proportional to the speed of the satellite relative to the sun. Therefore, if the frequency changes in sunlight can be measured, you can also know the speed of the satellite's view of the sun.

Zhao Jian told reporters that "Xunhe" adopted the principle of atomic frequency internationally on the orbit internationally, and used the super fine dietary spectrum of the sodium atom itself as the frequency standard to determine the frequency of the solar light in real time, and then obtain the satellite relative to the sun relative to the sun.View speed.After actual testing, the speed measurement accuracy of the navigation instrument is better than 2 meters per second, providing a new type of speed measurement technical means for the independent navigation in the future deep space detection task, which consolidates my country's originality in the field of deep space detection fields Technology accumulation.In addition, the relevant scientific and engineering departments have jointly proposed a series of task plans such as the sun and ground L5 sun exploration, the posterior rail detection, and the sun detection of the sun.Origin and evolution, monitoring inter -planet communication and ground response to the solar explosion, and contributing to the development of human scientific civilization.

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