China News Service, Beijing, August 30 (Ma Shuaisha Tuo Yiqian) The reporter learned from the China National Space Administration that the results of China's first solar exploration science and technology test satellite "Xihe" were officially released on the 30th.
The results of the "Xihe" sun exploration released this time are mainly based on solar scientific exploration and new satellite technology, setting five international firsts, including the world's first space solar Hα band spectral scanning imaging, and the world's first atomic frequency discrimination solar speed navigator. track verification, etc.
The full name of "Xihe" is the solar Hα spectral detection and double-super-platform science and technology experiment satellite. It was launched on October 14, 2021 and operates in a sun-synchronous orbit with an average altitude of 517 kilometers. The main scientific payload is the solar Hα imaging spectrometer. .
As China's first dedicated solar "photographer", "Xihe" has successfully achieved the world's first space-based solar Hɑ band spectral scanning imaging, and the world's first in-orbit acquisition of the fine structure of the sun's Hα, SiI and FeI lines.
According to the fine structure of these spectral lines, high-precision all-solar chromospheric and photospheric Doppler velocity fields can be inferred, and the activities occurring in the solar atmosphere can be recorded in detail, so as to study the physical process of solar activity.
At present, the "Xihe" is carrying out scientific observations every day according to the established mission plan. Nearly 100 solar eruptions have been observed, and related research work is being carried out.
The scientific data of "Xihe" is open to the world for sharing.
In addition to the achievements made in solar scientific exploration, in terms of new satellite technology experiments, the "Xihe" international first realized the master-slave collaborative non-contact "double-super" (ultra-high pointing accuracy, ultra-high stability) satellite platform technology on-orbit performance verification And engineering applications, to achieve the world's first solar space Hα imaging spectrometer on-orbit application, to achieve the world's first atomic frequency discrimination solar speed navigator on-orbit verification.
The "Double Super" satellite platform breaks the technical bottleneck of "unpredictable and difficult to control" micro-vibration of the traditional satellite platform, and adopts the maglev control technology to completely isolate the physical contact between the platform and the payload, ensuring that the payload imaging is not affected by the platform disturbance, allowing its Taking pictures is "more stable and more accurate", which has improved the attitude control level of China's satellite platforms by 1 to 2 orders of magnitude, reaching the international advanced level.
In the future, the dual-superplatform technology will be popularized and applied in a new generation of space missions such as high-resolution remote sensing, three-dimensional solar exploration, and exoplanet discovery, promoting the leap-forward development of China's space technology.
At present, the National Space Administration has organized relevant units to propose a series of mission plans such as solar detection at the L5 point of the sun, solar polar orbit detection, and solar approach detection. , to contribute to the development of human scientific civilization.
(Finish)