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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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  13. #193
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    Chang'e-4 has gone into dormant mode after traveling another 18.73 meters (it has traveled 565.9 meters in total).

    http://www.xinhuanet.com/english/202..._139464494.htm

    The lander and the rover of the Chang'e-4 probe have been switched to the dormant mode for the lunar night after working stably for the 23rd 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 9:40 p.m. Friday (Beijing Time) as scheduled, and the rover, Yutu-2 (Jade Rabbit-2), at 12 noon Friday, said the center.

    A lunar day is equal to 14 days on Earth, and a lunar night is the same length. The Chang'e-4 probe, which switched to dormant mode during the lunar night due to the lack of solar power, had been on the far side of the moon for 660 Earth days as of Saturday, and the rover has traveled 565.9 meters.

    During the 23rd lunar day, Yutu-2 went northwest, traveling toward an area with basalt and an impact crater area with high reflectivity. En route to the destination, the near-infrared spectrometer on the rover was used to detect a rock about 30 cm in diameter. The research team is analyzing the transmitted data.
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  14. #194
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    "China's Chang'e-4 probe resumes work for 24th lunar day"

    http://www.xinhuanet.com/english/202..._139505455.htm

    During the 24th lunar day, Yutu-2 will move northwest toward the basalt area or the impact craters with high reflectivity.

    Yutu-2 will take at least one panoramic photo, and its infrared imaging spectrometer, neutral atom detector and lunar radar will continue to carry out scientific explorations.
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  15. #195
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    Yutu-2 has been photographing the moon features on its journey on the far side of the moon. Unfortunately not much is published in the Western press. space.com has published the latest photo taken by Yutu-2 - 'stunning new panoramas from the moon's far side'

    https://www.space.com/china-moon-far...u-2-rover.html

    Meanwhile, a Chinese language drive diary, published while the two spacecraft hibernated during the very cold, roughly 14-Earth-day-long lunar night, details the Yutu 2 rover's latest activities, completed during the mission's 23rd day.

    Accompanying the drive diary are a host of stunning new photographs, including a panoramic image that shows a large crater amid a desolate landscape and the distant rim of Von Kármán Crater.
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  16. #196
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    Yutu-2 has now traveled a total of nearly 590 meters.

    Yutu-2 is reported as the second-longest-working rover on the moon. Can someone tell me which is the longest working rover on the moon? Yutu the 1st rover. It did not travel far but its instruments kept on working.

    http://www.ecns.cn/news/2020-11-25/d...h1835210.shtml

    China's Yutu 2 rover has been operating on the lunar surface for 692 Earth days, cementing its status as the second-longest-working rover on the moon, the China National Space Administration said.

    The second Chinese lunar rover, Yutu 2 is part of the ongoing Chang'e 4 mission, humanity's first endeavor to land on and closely observe the far side of the moon. The rover has traveled nearly 590 meters since it was deployed on Jan 3 last year.

    The administration said Chang'e 4's lander and the rover have finished their 24th lunar-day working session and are now in a dormant state for the lunar night.
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  17. #197
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    "China's lunar rover travels about 600 meters on moon's far side"

    http://www.xinhuanet.com/english/202..._139610902.htm

    China's lunar rover Yutu-2, or Jade Rabbit-2, has survived 719 Earth days and traveled 600.55 meters on the far side of the moon as of Tuesday.

    Both the lander and the rover of the Chang'e-4 probe have ended their work for the 25th lunar day, and switched to the dormant mode for the lunar night due to the lack of solar power, according to the Lunar Exploration and Space Program Center of the China National Space Administration.
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  18. #198
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    "Factbox: Fruits of Chang'e-4 probe on moon's far side in two years"

    Surprised to read, that there has been 4 articles published on Chang'e-4 data, in international journals to date.

    http://www.xinhuanet.com/english/202..._139641315.htm

    China's Chang'e-4 probe, including the lander and the rover, has worked on the far side of the moon for more than two years. The rover Yutu-2, or Jade Rabbit-2, has traveled more than 600 meters.

    Here are some facts about the Chang'e-4 probe and scientific findings during its two years on the moon's far side.
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  19. #199
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    NASA has kept track of Yutu-2

    https://www.space.com/china-chang-e-...er-2-years-old

    China's Yutu 2 rover just turned two years old, and NASA's Lunar Reconnaissance Orbiter has kept a sharp eye on its movements during its mission on the far side of the moon.
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  20. #200
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    "China's Chang'e-4 probe resumes work for 26th lunar day"

    http://www.xinhuanet.com/english/202..._139651439.htm

    The lander and rover of the Chang'e-4 probe have resumed work for the 26th lunar day on the far side of the moon.

    The lander woke up at 3:13 a.m. on Friday (Beijing time), and the rover Yutu-2, or Jade Rabbit-2, woke up at 10:29 a.m. on Thursday, according to the Lunar Exploration and Space Program Center of the China National Space Administration.

    Landing on the moon on Jan. 3, 2019, the Chang'e-4 probe has survived 736 Earth days on the moon.
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  21. #201
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    The Chang'e-4 probe is the receiver of the Chang'e-3 that launched on the Moon in 2013. Chang'e-4 made history by landing on the far side of the Moon in January 2019. Scientists believe that this region of the Moon contains ancient deposits of ice, preserved due to the lack of direct sunlight. The mission also intends to study the composition of the lunar crust and mantle in order to deepen our knowledge of how the Moon was formed billions of years ago.

  22. #202
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    "Chang'e-4 concludes work for 26th lunar day following new findings"

    https://news.cgtn.com/news/2021-01-2...1sY/index.html

    China's Chang'e-4 probe has been switched to dormant mode for the lunar night after working for a 26th lunar day, the Lunar Exploration and Space Program Center of the China National Space Administration said on Friday.

    The lander entered the dormant mode at 9:10 p.m. BJT on Wednesday after Yutu-2, the rover, switched to the mode at 2:06 p.m. BJT the same day.
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  23. #203
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    "Chang'E‐4 rover spectra revealing micro‐scale surface thermophysical properties of the Moon"

    This was published in the Geophysical Research Letters.


    https://agupubs.onlinelibrary.wiley....9/2020GL089226

    The Chang'E‐4 spacecraft landed in the Von Kármán Crater in the Moon's South Pole‐Aitken Basin. A Visible‐Near Infrared Spectrometer (VNIS) was carried on the “Yutu‐2” rover. The VNIS measured thermal emission on the surface of the Moon at short wavelengths and temperature variations at centimeter scales were retrieved during the 1st, 2nd, and 10th day of rover operations on the lunar surface. These in situ observations are an important complement to the existing large‐scale measurements taken from orbit and reveal that the millimeter scale roughness plays an important role when deriving temperatures and physical properties of the lunar surface regolith.
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  24. #204
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    "China's Chang'e-4 probe resumes work for 27th lunar day"

    http://www.xinhuanet.com/english/202..._139727894.htm

    The lander and rover of the Chang'e-4 probe have resumed work for their 27th lunar day on the far side of the moon.

    The lander activated at 4:48 p.m. on Saturday (Beijing time), and the rover Yutu-2, or Jade Rabbit-2, activated at 4:26 a.m. also on Saturday, according to the Lunar Exploration and Space Program Center of the China National Space Administration.

    Yutu-2 has traveled about 628.5 meters on the far side of the moon. It is currently located about 430 meters northwest of the landing site.
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  25. #205
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    "China's Yutu 2 rover finds 'milestone' on far side of the moon"

    https://www.space.com/china-yutu-2-m...tone-discovery

    China's Chang'e 4 spacecraft are back in action for a 27th lunar day on the far side of the moon, but it's the discoveries from the mission's previous lunar day that have scientists excited.

    The Chang'e 4 lander and Yutu 2 rover resumed activities on Feb. 6 after hibernating during the severe cold of lunar night, according to the Chinese state-run media outlet Xinhua. But one lunar day earlier the rover came across a curious rock specimen which the Yutu 2 drive team began to refer to as a "milestone."
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  26. #206
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    After traveling another 24.12 meters, Yutu-2 has called it a day.

    http://www.xinhuanet.com/english/202..._139754260.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 the 27th 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 1:30 p.m. Friday (Beijing Time) as scheduled, and the rover, Yutu-2 (Jade Rabbit-2), at 1:48 a.m. Friday, said the center.
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  27. #207
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    "China's Chang'e-4 probe resumes work for 28th lunar day"

    http://www.xinhuanet.com/english/202..._139794496.htm

    The lander and rover of China's Chang'e-4 probe have begun their 28th lunar day of work on the far side of the moon.

    Landing on the moon on Jan. 3, 2019, the Chang'e-4 probe has survived 795 Earth days on the moon, the Lunar Exploration and Space Program Center of the China National Space Administration said Monday.
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  28. #208
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    "China's lunar rover travels 682.77 meters on far side of moon"

    http://www.xinhuanet.com/english/202..._139827709.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 28th 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 2 a.m. Sunday (Beijing Time), and the rover, Yutu-2 (Jade Rabbit-2), at 5:09 p.m. Saturday, said the center.

    The Chang'e-4 probe, which was switched to dormant mode during the lunar night due to the lack of solar power, had been on the far side of the moon for more than 800 Earth days, and the rover has traveled 682.77 meters. A lunar day and night each equals about 14 days on Earth.
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  29. #209
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    "China's Chang'e-4 probe resumes work for 29th lunar day"

    http://www.xinhuanet.com/english/202..._139864462.htm

    The lander and rover of the Chang'e-4 probe have resumed work for a 29th lunar day on the far side of the moon.

    The lander woke up at 9:43 p.m. Tuesday (Beijing Time), and the rover, Yutu-2 (Jade Rabbit-2), awoke at 3:54 a.m. Tuesday, according to the Lunar Exploration and Space Program Center of the China National Space Administration.
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  30. #210
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    Two batches of scientific data released on Chang'e-4.

    "The thirteenth batch of scientific data released on Chang'e-4"

    https://moon.bao.ac.cn/pubMsg/detail-CE413.jsp

    On April 6, 2021, the ground application system of the lunar exploration project publicly released the thirteenth 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 March 2021, the Chang'e 4 lander and the Yutu 2 lunar rover have completed the 28-month scientific exploration work, and the lunar rover has accumulated a mileage of 682.77 meters.
    "The first batch of international cooperative payload scientific data released on Chang'e-4"

    https://moon.bao.ac.cn/pubMsg/detail-CE4-ic1.jsp

    On April 6, 2021, the ground application system of the lunar exploration project publicly released the first batch of scientific data on the Chang'e-4 international cooperative payload. The data released this time is provided by ground-based application systems, including the two international cooperative scientific payloads carried on the Chang'e 4 lander and the patrol rover (Yutu 2 lunar rover) during the first to December day. Data, a total of 194 data files, the total amount of data is 1.36 GB. For detailed data description, please refer to the product description . Specific data include:
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