Which is the first experimental satellite for solar exploration science and technology in China?

The full name of "Xihe" is the solar Hα spectrum detection and double super-platform scientific and technological experimental satellite, which is the first scientific and technological experimental satellite for solar detection in China. It runs in a sun-synchronous orbit with a height of 5 17km, and its main scientific load is the solar space telescope. Xi he was developed by the Eighth Institute of China Aerospace Science and Technology Corporation, and applied magnetic levitation technology in orbit for the first time, aiming at completing the first on-orbit flight test of ultra-high pointing accuracy platform and ultra-high stability platform. ?

Brief introduction of satellite

The full name of "xi River" is the solar Hα spectrum detection and double super-platform scientific and technological experimental satellite. It runs in a sun-synchronous orbit with a height of 5 17 km, and its main scientific load is the solar space telescope. Hα is one of the best spectral lines to study the response of solar activity to photosphere and chromosphere. By analyzing the data of this spectral line, we can get the changes of atmospheric temperature, velocity and other physical quantities during solar burst, which is helpful to study the dynamic process and physical mechanism of solar burst.

During the satellite's in-orbit operation, it will observe the photosphere and chromosphere performance of solar flares and coronal mass ejections, explore the dynamic characteristics and trigger mechanism of the source region of solar bursts, detect the chromosphere performance of the formation and evolution process of solar dark stripes, and reveal its internal relationship with solar bursts. We will also obtain the Doppler velocity distribution of the whole heliosphere in the Hα band and study the dynamic process of the lower atmosphere of the sun, which will provide important support for solving scientific problems such as "the physical model of the whole process of energy transfer inside and outside the solar explosion".