Shulou(Shulou.com)11/24 Report--

CTOnews.com, December 13, according to the website of the National Space Science Center of the Chinese Academy of Sciences, the press conference on the first scientific images of China's integrated solar exploration satellite Kuafu-1 was held this morning at the National Space Science Center of the Chinese Academy of Sciences in Huairou Science City, Beijing.

This press conference released to the public a number of scientific observation images of the sun obtained during the two-month operation of the three payloads since the successful launch of Kuafu-1 on October 9, 2022, realizing a number of scientific observation images of the sun for the first time at home and abroad. the observation ability and advanced nature of the three payloads of Kuafu-1 have been verified in orbit.

Up to now, the three payloads of "Kuafu-1"-FMG, HXI and LST-are in normal state, and the satellite platform and each payload meet the design requirements. High precision and stable attitude pointing, stable working temperature environment, reliable satellite-to-ground measurement and control and data transmission links have been established, and stable energy has been obtained. It effectively ensures that the satellite is working in orbit.

CTOnews.com learned that the National Space Science Center said that during its two months in orbit, Kuafu-1 carried out a large number of on-orbit tests and observations of the sun according to the established plan. Among them, the diurnal vector magnetic imager (FMG) realized the solar magnetic field observation in space for the first time in China, and the quality of the local longitudinal magnetic map of the sun has reached the international advanced level, in order to focus on the scientific goal of "one magnetic field, two storms". The realization of high time resolution and high precision solar magnetic field observation has laid a good foundation.

Solar hard X-ray imager (HXI) realizes the first solar hard X-ray imaging in China, and provides the only solar hard X-ray image from the earth's perspective at present. The overall image quality reaches the international first-class level, which lays a solid foundation for the observation of non-thermal radiation spatial distribution, time structure and energy spectrum characteristics of solar flares.

One of the three sub-loads of the Lehmann Alpha Solar Telescope (LST), the Solar Solar Imager (SDI) has obtained the Lehmann Alpha band all-day image on the satellite platform for the first time, in which the evolution image of the prominence is clear and complete. Another sub-load, the Solar White Light Telescope (WST), observed two rare "white light flares" on the edge of the sun, and the observation ability of Lehmann Alpha band was verified. As the sub-payload solar coronometer (SCI) starts to observe the coronal mass ejection, the Lehmann Alpha Solar Telescope (LST) will play an irreplaceable role in the observation of the solar surface formation and the recent coronal propagation of the coronal mass ejection.

According to reports, in the next stage, "Kuafu 1" will continue to carry out and complete the on-orbit test in accordance with the established plan, and turn into the stage of scientific operation in orbit at an early date. At the same time, "Kuafu-1" will give full play to the characteristics of the three payload combination observations, strengthen cooperation and data opening and sharing at home and abroad, and achieve the scientific goal of "one magnetic field, two storms" as soon as possible.

Kuafu-1, known as the Advanced Space-based Solar Observatory (ASO-S), is another space science satellite developed and launched by the second phase of space science of the Chinese Academy of Sciences. It was successfully launched with a long March 2d carrier rocket at the Jiuquan Satellite launch Center on October 9, 2022. " The scientific goal of the Kuafu-1 satellite aims at "one magnetic storm, two storms", that is, simultaneously observing the solar magnetic field and the two most violent explosive phenomena on the sun-flares and coronal mass ejections-- to study their formation, evolution, interaction and correlation with each other, and to provide support for space weather forecasting.

The following are the first scientific observation images of "Kuafu 1" released by the National Space Science Center of the Chinese Academy of Sciences:

Figure 1 shows the local monochromatic image and magnetic map observed by the diurnal vector magnetic imager (FMG) in orbit, as well as the comparison with the Huairou ground diurnal magnetic field telescope on the same solar surface at the same time. Figure 2 shows the comparison of the local longitudinal magnetogram observed by 00:50:15UT FMG on November 6, 2022 with the most advanced international HMI / SDO observations at the same time. The results show that the observation effect of FMG is much better than that of ground-based telescopes, and FMG is almost identical to the most advanced HMI / SDO in reflecting the details of local longitudinal magnetic field.

Figure 1. The local monochromatic image and magnetic map observed by FMG in orbit (right) are compared with the results of Huairou ground diurnal magnetic field telescope on the same solar surface at the same time (left). The figure is from the website of the National Space Science Center of the Chinese Academy of Sciences, the same below.

Figure 2. Comparison of 00:50:15UT local longitudinal magnetogram (right) observed by FMG on November 6, 2022 with HMI / SDO observations of the United States at the same time (left). Figures 3 and 4 show the comparison of the hard X-ray imaging results of the "double 11" series of flares observed by the Solar hard X-ray Imager (HXI) on November 11, 2022 with the UV 1700 An images simultaneously observed by AIA / SDO, and the flare hard X-ray light variation and hard X-ray imaging combined with AIA / SDO EUV / UV images, respectively. It can be clearly seen from the picture that the position of the hard X-ray source coincides perfectly with the position of the UV bright structure at high spatial resolution. It is particularly noteworthy that HXI has the imaging ability of complex sources, and the imaging reliability has been fully confirmed.

Figure 3. Comparison between the hard X-ray image of a class C flare observed by HXI on November 11, 2022 and the AIA / SDO UV 1700 image

Figure 4. Light variation, hard X-ray imaging of the "double 11" series of flares observed by HXI on November 11, and combined with AIA / SDO EUV / UV images work on the Lehmann Alpha Solar Telescope (LST) subpayload, the Solar Solar Imager (SDI). Several flares and prominences have been observed since boot. Figure 5 shows an explosive prominence observed by SDI / LST on November 25.

Figure 6 shows a rare marginal white light flare observed by the Solar White Light Telescope (WST) on LST on December 3, 2022, and Lehmann Alpha radiation is also observed by SDI. These results show that WST and SDI on LST have the ability of scientific observation, and the results provide valuable data for the detailed study of Lehmann alpha band evolution and multi-band diagnosis of white light flares.

Figure 5: eruptive prominence observed by SDI / LST on November 25, 2022

Figure 6. WST / LST observed a white light flare on November 7. The red isoline on the right is the position of the continuous spectral enhancement relative to the sunspot.

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