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Thread: China's Chang'e 4 mission

  1. #181
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    Quote Originally Posted by Swift View Post
    I wonder what the life expectancy of the rover is. Did they expect it to last this long, or is it working longer than expected?
    It was supposed to have a three-month design life. See post #120
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  2. #182
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    "China's Chang'e-4 probe resumes work for 21st lunar day"

    http://www.xinhuanet.com/english/202..._139290129.htm

    The lander and rover of the Chang'e-4 probe have resumed work for the 21st lunar day on the far side of the moon.

    The lander woke up at 14:54 Thursday (Beijing Time) while the rover awoke at 20:34 Wednesday. Both are in normal working order, according to the Lunar Exploration and Space Program Center of the China National Space Administration. Enditem
    "The fifth batch of scientific data released on Chang'e-4" (the article is in Mandarin and has been translated by Google)

    http://moon.bao.ac.cn/pubMsg/detail-CE45.jsp

    On August 10, 2020, the ground application system of the lunar exploration project publicly released the fifth batch of scientific data on Chang'e-4. The Chang'e-4 probe successfully landed on the back of the moon on January 3, 2019 Beijing time, realizing the world's first soft landing and patrol survey on the back of the moon. As of August 2020, the Yutu 2 lunar rover has completed its scientific exploration for the 20th month, with a cumulative mileage of 490.9 meters.

    The data released this time is provided by the ground application system, including the scientific data obtained during the eighth day of the eighth month by the 4 scientific payloads carried on the Chang'e 4 lander and the patrol rover (Yutu 2 lunar rover), a total of 338 data File, the total amount of data is 2.83GB, please refer to the product description for detailed data description, specific data include:
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  3. #183
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    After 400 earth days on the moon, Chang'e-4 has traveled over half a kilometre.

    http://www.ecns.cn/news/sci-tech/202...u2685276.shtml

    The lander and the rover finished their work for the 21st lunar day and switched to the dormant mode for the lunar night on Tuesday. By this day, the rover traveled 519.29 meters in a new record.

    Queqiao (magpie bridge) the relay satellite is in normal working condition.

    Scientists have carried out extensive research based on the data transferred by the scientific payloads on the rover and achieved positive results.

    Through data from the visible/near-infrared imaging spectrometer, panoramic camera and lunar radar, they analyzed the spectrum, rock distribution, and shallow structure of the landing zone, and drew scientific conclusions on the morphology, material mineral composition, source and characteristics of the landing area.

    For the first time, the composition of deep lunar materials was obtained directly through in-situ exploration, revealing the complex geological evolution of the far side of the Moon, especially the South Pole-Aitken Basin where the probe landed last year. It provides key evidence of the formation and evolution model of lunar soil, and also important reference for site selecting for future lunar missions' landing, inspection and exploration.
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  4. #184
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    "Chinese lunar probe's 600 days on Moon's far side"

    Article has a cross section of the moon showing 3 distinct layers.

    http://www.ecns.cn/news/sci-tech/202...u2686072.shtml

    As of last Wednesday, the lander and the rover of the Chang'e-4 probe have completed work for the 21st lunar day on the far side of the moon and is currently in dormant mode during the lunar night due to lack of solar power, according to the Lunar Exploration and Space Program Center of the China National Space Administration.

    Last Tuesday was the 600th day of Chang'e-4 on the moon and the rover had traveled 519.29 meters.

    The rover Yutu-2, or Jade Rabbit-2, has far exceeded its three-month design lifespan, becoming the longest-working lunar rover on the moon.

    With the help of data transmitted to Earth, Chinese researchers have made progress in vital research such as the moon's geological evolution, radiation and low-frequency radio environment.
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  5. #185
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    "China's Chang'e-4 probe reveals landing site impact history on moon's far side"

    http://www.xinhuanet.com/english/202..._139352621.htm

    Based on data from China's Chang'e-4 probe, Chinese scientists have determined the thickness of the regolith and revealed the fine subsurface structures and evolutionary history of the probe's landing site on the moon's far side.

    The study revealed that the landing area of the probe, located within the largest and oldest impact basin on the moon, had experienced multiple impact events and basalt magma eruptions.
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  6. #186
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    "China's Chang'e-4 probe resumes work for 22nd lunar day"

    http://www.xinhuanet.com/english/202..._139363440.htm

    The lander and rover of the Chang'e-4 probe have resumed work for the 22nd lunar day on the far side of the moon.

    The lander woke up at 5:15 a.m. on Saturday (Beijing time), and the rover Yutu-2, or Jade Rabbit-2, woke up at 11:54 a.m. on Friday, sources with the Lunar Exploration and Space Program Center of the China National Space Administration said.
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  7. #187
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    Chang'e-4 has gone into dormant mode after traveling another 28 meters.

    http://www.xinhuanet.com/english/202..._139393419.htm

    The lander and the rover of the Chang'e-4 probe have been switched to dormant mode for the lunar night after working stably for a 22nd lunar day, according to the Lunar Exploration and Space Program Center of the China National Space Administration.

    The lander was switched to dormant mode at 7:30 a.m. on Thursday (Beijing Time) as scheduled, and the rover, Yutu-2 (Jade Rabbit-2), at 11:18 p.m. on Wednesday, said the center on its official social media platform accounts.
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  8. #188
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    The radar detection data from Chang'e-4 has given scientist insights on what is below the lunar soil and shallow structure of the landing area.

    https://news.cgtn.com/news/2020-09-2...dUk/index.html

    The results showed the materials detected by Yutu-2 come from the nearby Finsen impact crater rather than the basalt erupted from the lunar mantle, which filled the bottom of the Von Karman Crater.

    It was further revealed that the Von Karman Crater, the landing area of Chang'e-4, had experienced multiple impacts and basalt magma eruptions.

    The latest discoveries are of great significance for understanding the evolution of the South Pole-Aitken basin of the Moon, as well as for the future exploration and study on the composition and structure of the lunar interior.
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  9. #189
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    "How in*tense and dan*ger*ous is cos*mic ra*di*a*tion on the Moon?"

    https://www.dlr.de/content/en/articl...-the-moon.html

    The Chang'e-4 lunar lander touched down on the far side of the Moon on 3 January 2019, with a German instrument for measuring space radiation on board. Since then, the Lunar Lander Neutron and Dosimetry (LND) instrument has been measuring temporally resolved cosmic radiation for the first time. Earlier devices could only record the entire 'mission dose'. In its current issue, the scientific journal Science Advances reports on the work of the international group of scientists involved with the LND, including researchers from the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR). Their investigations have involved more precise radiation measurements on the Moon.

    "Over the coming years and decades, various nations are planning to send crewed missions to explore the Moon. Space radiation poses a significant risk to the health of humans. The Apollo astronauts carried radiation measuring devices, referred to as dosimeters, on their bodies. But these only determined the radiation exposure over the course of the entire mission," says Oliver Angerer, LND Project Manager at the DLR Space Administration. With the LND instrument it is possible to measure the various characteristics of the radiation field over time intervals of one, 10 or 60 minutes. This enables researchers to calculate the 'equivalent dose', which is important for estimating biological effects.
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  10. #190
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    "China's Chang'e-4 probe resumes work for 23rd lunar day"

    http://www.xinhuanet.com/english/202..._139432467.htm

    The lander and rover of the Chang'e-4 probe have resumed work for the 23rd lunar day on the far side of the moon.

    The lander woke up at 11:56 a.m. Sunday, Beijing Time, and the rover Yutu-2, or Jade Rabbit-2, woke up at 6:57 p.m. Saturday, said sources with the Lunar Exploration and Space Program Center of the China National Space Administration.
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  11. #191
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    Congratulations to the 3 Chang'e-4 scientist who were presented with the International Astronautical Federation (IAF)'s World Space Award.

    The article also includes a 1.3 minute video on Chang'e-4.

    https://www.space.com/china-chang-e-...n-lunar-day-23

    Yu Dengyun, Sun Zezhou and Wu Weiren received the accolade, with Yu, the deputy designer-in-chief of China's Lunar Exploration Program, delivering a highlight lecture at the 71st International Astronautical Congress 2020 on Monday (Oct. 12) to mark the award. The annual event was held online due to the COVID-19 pandemic.

    Yu's talk highlighted a number of breakthroughs that made the mission possible. Among these were demonstrating the first continuous, reliable communication with the far side of the moon through the Queqiao relay satellite. Queqiao orbits a special, gravitationally stable point beyond the moon, from which it maintains constant line-of-sight with both ground stations on Earth and the spacecraft on the lunar far side, enabling communications.
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  12. #192
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    China releases 7th batch of science data from Chang'e-4 mission.

    http://moon.bao.ac.cn/pubMsg/detail-CE47.jsp

    On October 9, 2020, the ground application system of the lunar exploration project publicly released the seventh batch of scientific data on Chang'e-4. The Chang'e-4 probe successfully landed on the back of the moon on January 3, 2019 Beijing time, realizing the world's first soft landing and inspection survey on the back of the moon. As of the end of September 2020, the Chang'e 4 lander and the Yutu 2 lunar rover have completed the 22nd month of scientific exploration, and the lunar rover has accumulated a mileage of 547.17 meters.

    The data released this time is provided by the ground application system, including the scientific data acquired during the tenth day of the tenth month by the 4 scientific payloads on the Chang'e 4 lander and the patrol rover (Yutu 2 lunar rover), a total of 360 data File, the total amount of data is 3.15GB. For detailed data description, please refer to the product description .
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