China News Service, October 24. According to the WeChat public account of the Lunar Exploration and Space Engineering Center, the Chang'e 4 lander and the "Yutu 2" lunar rover completed the 23rd day of work, at 21:40 on October 23. At 12 o'clock, complete the moon night mode setting according to ground instructions and enter moon night sleep.
During the 23-month scientific exploration, the lander's lunar surface neutron and radiation dose detector carried out the world's first on-site land particle radiation environment detection on the lunar surface.
Data map: The panoramic camera of the Yutu 2 patrol device imaged the Chang'e 4 lander.
Photo courtesy of China National Space Administration
As of today, the Chang'e-4 lander and the "Yutu-2" lunar rover have successfully worked on the back of the moon for 660 earth days, with a cumulative travel of 565.9 meters.
Based on the data of the panoramic camera stitched images and DOM images on the 22nd day, the "Yutu-2" lunar rover traveled to the basalt distribution area and the impact crater area with higher reflectivity during the 23rd day. Both locations are Located northwest of the lunar rover.
In this travel route, the infrared imaging spectrometer performed a spectral detection of a rock block with a diameter of about 30 cm.
The scientific research team is conducting in-depth research on the detection data.
During the 23-month scientific exploration, the lander's lunar surface neutron and radiation dose detector carried out the world's first on-site on-site particle radiation environment detection on the lunar surface, and obtained precious first-hand scientific data. The research results are in Science Advance Journal published.
The moon surface neutron and radiation dose detector can comprehensively measure the total particle radiation dose, neutral particle radiation dose, particle radiation LET spectrum, neutrons, and charged particles on the moon surface.
The actual measurement results show that the particle radiation dose rate near the landing zone is 13.2uGy/h(si), the dose equivalent is twice that of the surface of Mars and the interior of the space station, 5 to 10 times of a flight, and 300 times of the surface of the earth (Beijing).
These field measurement results provide important radiation environment parameters for the follow-up lunar exploration in my country.
The load also distinguishes the radiation doses of charged particles and neutral particles, thereby providing more accurate radiation physical quantities, which can serve the radiation protection of future astronauts.