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Chang'e 5 sample return mission
Paolo
post Jul 2 2017, 06:37 PM
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let's look at the bright side: maybe CE-4 will finally fly before CE-5
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Phil Stooke
post Sep 25 2017, 10:50 AM
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https://twitter.com/jeff_foust/status/912197913995911168

Confirmation that the Chang'E 5 schedule will change, though no details of how. Other rumours suggest CE4 in 2018, CE5 in 2019, CE6 in 2020. Paolo - you may be right!

Phil


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Phil Stooke
post Dec 14 2017, 11:16 PM
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Chang'E 5 T1, the mission which tested the return capsule design for Chang'E 5, also imaged the CE5 landing area near Rumker - see a few posts above this for more details. This paper:

https://www.spiedigitallibrary.org/conferen...623.short?SSO=1

describes attempts to de-blur these images. (you can't get the paper without subscription, but you can get the abstract from that page).

This probably explains why so few images have been released. In any case, LRO images will be better and are freely available for the mission planners to use.

Phil



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Phil Stooke
post Jan 12 2018, 07:26 AM
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Confirmation CE5 T1 is still operating in lunar orbit:


https://forum.nasaspaceflight.com/index.php....msg1770545#new


Phil



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Steve G
post Apr 16 2018, 12:34 PM
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Update on the long March 5 failure and schedule for Chang'e 5

http://spacenews.com/china-reveals-cause-o...turn-to-flight/
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Huguet
post Jan 17 2019, 02:58 PM
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Let's hope they acelerate their program due to CE4 success.

"China to launch Chang'e 5 mission to moon by year-end (Chinadaily.com.cn) 15:32, January 14, 2019
Wu Yanhua, deputy head of the China National Space Administration said at a news conference Monday that the next step in China's lunar exploration program, the Chang'e 5 mission, will take place around the end of this year."

http://en.people.cn/n3/2019/0114/c90000-9537543.html

"Experts are still discussing and verifying the feasibility of subsequent projects, but it's confirmed that there will be another three missions after Chang'e 5," Wu Yanhua, deputy head of the China National Space Administration (CNSA), said at the press briefing.

"Chang'e 6 mission will be designed to bring samples back from the moon's south polar region. Chang'e 7 mission will carry out comprehensive surveys around the moon's south pole, including studying terrain and landforms, the physical composition as well as the space environment in the region.
Chang'e 8 mission, in addition to scientific surveys and experiments, will test key technologies to lay the groundwork for the construction of a science and research base on the moon"
Xinhua reported.

https://www.space.com/43000-china-moon-expl...earch-base.html

...waiting gladly for more info in the 3D Lunar Base printing idea to be tested on the new ce8 project... 3D lunar printing technology can be the huge paradigm break of the XXI century,.. starting printing lunar base body, and then print new space ship body parts?... wink.gif ...the moon seens a good place to build factorys...


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SpaceListener
post Jan 17 2019, 03:22 PM
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QUOTE (Huguet @ Jan 17 2019, 08:58 AM) *
Let's hope they acelerate their program due to CE4 success.
http://en.people.cn/n3/2019/0114/c90000-9537543.html

Not only depends upon to the success of CE4 but also of the third launch of Long March 5 by 2nd quarter 2019 launching a telecommunication satellite Shijian-20. The fourth Long March 5 will turn to CE5, hopefully, it will occur by December 2019.
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nogal
post Jan 25 2019, 10:38 PM
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Quote from the ESA "Beckoning Moon" post at http://www.esa.int/spaceinimages/Images/20.../Beckoning_Moon
"... later this year, ESA tracking stations will provide critical support to China's Chang'e-5 lunar sample return mission, providing communications just after launch and helping Chinese mission controllers determine the precise trajectory of the return capsule."
Fernando
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Thorsten Denk
post Jan 29 2019, 12:49 PM
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Long March 5 return to flight in July.
If all goes well, Cháng'é-5 at the end of the year.

http://www.xinhuanet.com/english/2019-01/29/c_137784351.htm

Thorsten
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Huguet
post Dec 31 2019, 01:42 PM
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https://futurism.com/the-byte/china-launche...-march-5-rocket

Long March 5 Flying Again,.. now just to confirm chang-e´5, space station and mars mission for next year... smile.gif

Gladly waiting for 2020...

"The return of Long March-5 inspires China to reach for the stars"
http://www.xinhuanet.com/english/2019-12/28/c_138663650.htm


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Paolo
post Apr 17 2020, 05:22 PM
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some scientific results from the lunar orbiting phase of the CE-5T1 mission:

A degree-100 lunar gravity model from the Chang’e 5T1 mission

QUOTE
Context. Chinese lunar missions have grown in number over the last ten years, with an increasing focus on radio science investigations. In previous work, we estimated two lunar gravity field models, CEGM01 and CEGM02. The recently lunar mission, Chang’e 5T1, which had an orbital inclination between 18 and 68 degrees, and collected orbital tracking data continually for two years, made an improved gravity field model possible.

Aims. Our aim was to estimate a new lunar gravity field model up to degree and order 100, CEGM03, and a new tidal Love number based on the Chang’e 5T1 tracking data combined with the historical tracking data used in the solution of CEGM02. The new model makes use of tracking data with this particular inclination, which has not been used in previous gravity field modeling.

Methods. The solution for this new model was based on our in-house software, LUGREAS. The gravity spectrum power, post-fit residuals after precision orbit determination (POD), lunar surface gravity anomalies, correlations between parameters, admittance and coherence with topography model, and accuracy of POD were analyzed to validate the new CEGM03 model.

Results. We analyzed the tracking data of the Chang’e 5T1 mission and estimated the CEGM03 lunar gravity field model. We found that the two-way Doppler measurement accuracy reached 0.2 mm s−1 with 10 s integration time. The error spectrum shows that the formal error for CEGM03 was at least reduced by about 2 times below the harmonic degree of 20, when compared to the CEGM02 model. The admittance and correlation of gravity and topography was also improved when compared to the correlations for the CEGM02 model. The lunar potential Love number k2 was estimated to be 0.02430±0.0001 (ten times the formal error).

Conclusions. From the model analysis and comparison of the various models, we identified improvements in the CEGM03 model after introducing Chang’e 5T1 tracking data. Moreover, this study illustrates how the low and middle inclination orbits could contribute better accuracy for a low degree of lunar gravity field.
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Huguet
post Jul 23 2020, 12:23 PM
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Andrew Jones - https://twitter.com/AJ_FI/status/1286213255694823424
"Today's successful launch of Tianwen-1 also means China will move on to launch the Chang'e-5 lunar sample return mission in Q4 this year, also on a Long March 5. That will be a fascinating mission in terms of science and mission complexity."
Larry Teds reply - "I heard from the live interview at CCTV APP that the LM5 for CE5 will arrive at Wenchang in late Sep, and the launch date is set at Nov 24th. Look forward to this mini-Apollo-style robotic mission."

So, it seens Chang'e-5 will fly on november. And others missions will start to get dates...


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Phil Stooke
post Nov 19 2020, 05:19 AM
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Launch next week! Here's an interesting paper about using cameras on the sampling arm to map the sampling area. Sampling is twofold on this mission, with a drill and with an arm, doubling the chance of getting something. Monitoring cameras like MSL Hazcams will view the scene, but two cameras on the arm can be used for mapping as well.

https://www.int-arch-photogramm-remote-sens...0-1159-2020.pdf

Also there is an infrared spectrometer like that on the Yutu and Yutu 2 rovers. The rover instruments are body-fixed but the CE5 version can be pointed and will scan an area near the lander.

Fingers crossed - I hope to be mapping the site soon.

Phil


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nogal
post Nov 19 2020, 06:21 PM
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QUOTE (Phil Stooke @ Nov 19 2020, 05:19 AM) *
Launch next week!

ESA is collaborating with China on the Chang'e-5 mission, see this article ESA tracks Chang'e-5 Moon mission
Most interestingly two dates are given: November 23 for the outbound flight and "around 15 December" for the return to Earth.
Fernando
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Phil Stooke
post Nov 21 2020, 08:39 PM
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I forgot to mention in my recent post that there is a lunar-penetrating radar as well. Here is an interesting open-access paper about the radar:

https://www.essoar.org/doi/abs/10.1002/essoar.10504784.1

Phil


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