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

CTOnews.com, January 12 (Xinhua) Chinese lunar exploration officials said that with the support of the National Space Administration, Chinese and foreign scientists made use of China's "Tianmen-1" orbiter and ESA's "Mars Express" orbiter to measure and control communication signals during the Martian sun, and achieved important research results.

The relevant results have been published in the international professional journal The Astrophysical Journal Letters in the field of astronomy. The correspondent authors are Ma Maoli of the Shanghai Observatory of the Chinese Academy of Sciences and Guifre Molera Calv é s of the University of Tasmania in Australia. CTOnews.com is accompanied by a link to the article DOI 10.3847pm 2041-8213/ac96e7.

To put it simply, Mars Sunshine refers to the natural phenomenon that the earth and Mars move to both sides of the sun and the three are almost in a straight line. During the Martian sunrise, the radio signal sent by the Mars probe to the earth measurement and control station passes through the nearby solar space (hereinafter referred to as the solar space), which is disturbed by solar electromagnetic radiation, resulting in changes in its signal intensity and frequency. Through the study of these effects, scientists can invert the activity of the sun.

During the Martian sunrise from late September to mid-October in 2021, the Tianmen-1 orbiter and the ESA Mars Express orbiter mission team controlled two probes to regularly send radio signals to Earth. Scientists from many countries used more than a dozen radio telescopes at home and abroad to observe how the signals of the two probes were affected by the sun and obtained a large amount of data. On October 9, 2021, researchers found that six observation stations received radio signals from Tianmen-1 and Mars Express with the strongest ±20Hz disturbance for up to 10 minutes.

Through the analysis of the disturbance signal, the researchers found that when the radio signal propagated through the solar space, the total electron content in this area changed by thousands of TECU (total electronic units, 1TECU=1016 electrons per square meter).

In addition, the primary high-speed solar wind flow was detected when CME left. The primary solar wind refers to the solar wind that has just emitted from the sun. It is generally believed that the primary solar wind is of low speed and will form a high-speed solar wind only when it accelerates within the range of 5Rs~20Rs from the heliocentric. The researchers speculate that the primary high-speed solar wind may be affected by magnetohydrodynamic waves from the sun. This observation work also shows that the method of multi-station observation can provide observation data support for researchers to study the flow of solar wind and the fluctuation of magnetic fluid.

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