China's Chang'e-4 probe soft-lands on moon's far side - Xinhua

[JSCh]

中国航天科技集团
今天 09:02
【玉兔二号月球车已自主唤醒，开展第四月昼工作】玉兔二号月球车已于3月29日20时28分自主唤醒，中继前返向链路建立正常，平台工况正常。玉兔二号月球车将按计划开展第四月昼工作，继续实施巡视科学探测任务。科研人员将精确操作，严密监控，确保不断取得更加丰硕的科学成果。着陆器预计3月30日唤醒

China Aerospace Science and Technology Corp.
Today 09:02

[Yutu No. 2 lunar rover has autonomously awakened and ready to carry out the fourth month of work] The Yutu No. 2 lunar rover has autonomously awakened at 20:28 on March 29, the return link was established normally with the relay satellite, the working conditions of the system is also normal. The Yulu No. 2 lunar rover will carry out the fourth month of work as planned and continue to implement the scientific expedition mission. Researchers will operate accurately and closely to ensure that they continue to achieve more fruitful scientific results. The lander is expected to wake up on March 30.

 

[LKJ86]

 

[LKJ86]

 

[JSCh]

玉兔二号月球车完成出月午设置，继续开展第四月昼工作

中国探月工程 发布于 2019-04-09 14:26:12 投诉
4月2日7时25分，玉兔二号月球车进入月午休眠模式。4月8日22时4分，玉兔二号月球车完成出月午设置，前返向链路建立正常，平台工况正常，按计划继续开展第四月昼工作。截至目前，玉兔二号月球车已累计行走170.92米。

The yutu 2 lunar rover completed its lunar noon setting and continued its work for fourth lunar daytime
China lunar exploration project released at 2019-04-09 14:26:12

At 7:25 on April 2, the yutu no. 2 lunar rover went into sleep mode. At 22:4 on April 8, yutu no. 2 lunar rover completed the setting for lunar noon, and the forward backward communication link was set up normally, and the platform worked normally. It continued to work in the fourth lunar day as planned. So far, the yutu 2 rover has traveled 170.92 meters.

 

[LKJ86]

China's lunar rover travels over 170 meters on moon's far side
Source: Xinhua | 2019-04-09 22:07:12 | Editor: Yamei

BEIJING, April 9 (Xinhua) -- China's lunar rover has driven 170.92 meters on the far side of the moon to conduct scientific exploration on the virgin territory.

The rover Yutu-2, or Jade Rabbit-2, took a "noon break" from April 2 to April 8, as the temperatures on the moon were extremely high, and continued its exploration, according to the Lunar Exploration and Space Program Center of the China National Space Administration.

The rover was sent to the Von Karman Crater in the South Pole-Aitken Basin on the far side of the moon on Jan. 3 for the Chang'e-4 mission. It has worked longer than its three-month design life.

As a result of the tidal locking effect, the moon's revolution cycle is the same as its rotation cycle, and the same side always faces the Earth.

The far side of the moon was regarded as a virgin territory with unique features, and scientists expect important discoveries.

The 135-kg Jade Rabbit-2 is the first ever rover to drive on the moon's far side, as well as the lightest rover ever sent to the moon.

The rover has scientifically examined some stones on the far side of the moon, which might help scientists find out whether they are from outer space or native to the moon.

Scientists hope Jade Rabbit-2 will travel farther to send more images of the unknown terrain, "listen" to the stories recorded in the ancient lunar rocks, and find more traces of the early history of the moon and the solar system.

Source:http://www.xinhuanet.com/english/2019-04/09/c_137963322.htm

 

[JSCh]

China's Chang'e-4 probe switches to dormant mode
Source: Xinhua| 2019-04-12 14:28:18|Editor: zh

BEIJING, April 12 (Xinhua) -- The lander and the rover of the Chang'e-4 probe switched to dormant mode for the lunar night on Friday, with the rover traveling an accumulated 178.9 meters on the far side of the moon.

The rover Yutu-2, or Jade Rabbit-2, is expected to awaken again on April 28, and the lander to awaken the following day, according to the Lunar Exploration and Space Program Center of the China National Space Administration.

The Chang'e-4 probe made the first-ever soft-landing on the Von Karman Crater in the South Pole-Aitken Basin on the far side of the moon on Jan. 3.

As a result of the tidal locking effect, the moon's revolution cycle is the same as its rotation cycle, and the same side always faces the Earth.

The far side of the moon was regarded as a virgin territory with unique features, and scientists expect important discoveries.

A lunar day equals 14 days on Earth, and a lunar night is the same length. According to the measurements of Chang'e-4, the temperature of the shallow layer of the lunar soil on the far side of the moon dropped to as low as minus 190 degrees Centigrade, lower than data obtained by the U.S. Apollo mission on the near side of the moon.

 

[JSCh]

Scott Tilley the amateur astronomer that track what is alive and transmitting radio signal from lunar orbit and neighborhood. Three from China and one from US.

https://twitter.com/x/status/1116545191442178048

Scott Tilley@coastal8049

With the loss of @TeamSpaceIL #Beresheet today, I took stock of the goings on in lunar orbit and neighbourhood to remind me of how amazing the process of exploration is exploding around the Moon these days. Success only smiles on those that try. Indian is up next?

11:34 AM - Apr 12, 2019

 

[JSCh]

https://twitter.com/x/status/1117989970382168064

Yutu2 Rover@yutu2rover

Hello! I'm back again. My big sis #ChangE4 went to bed and will probably sleep until April 29, 7:00 am Beijing time. Guess I'll be on guardian duty to protect her!

#Yutu2 #JadeRabbit

11:15 AM - Apr 16, 2019

 

[Dungeness]

https://twitter.com/x/status/1117989970382168064

Yutu2 Rover@yutu2rover

Hello! I'm back again. My big sis #ChangE4 went to bed and will probably sleep until April 29, 7:00 am Beijing time. Guess I'll be on guardian duty to protect her!

#Yutu2 #JadeRabbit

11:15 AM - Apr 16, 2019

So, Yutu2 Rover is suffering from insomnia?

 

[JSCh]

So, Yutu2 Rover is suffering from insomnia?

Guess that mean that Yutu-2 is not exactly "sleeping", just immobile.

 

[JSCh]

From China Lunar Exploration Project (CLEP),

2019年4月18日，国家航天局在北京组织召开嫦娥四号国际载荷科学数据交接暨月球与深空探测合作机会公告发布仪式。仪式由国家航天局副局长吴艳华主持。

国家航天局局长张克俭致欢迎辞，并向瑞典交接了中性原子探测仪数据、向德国交接了中子及辐射剂量探测仪数据、向荷兰交接了低频射电频谱仪数据，三个国家的代表分别进行了发言。

On April 18, 2019, China National Space Administration organized a ceremony for delivery of scientific data from international payloads of Chang'e-4 mission in Beijing. The ceremony was presided over by Wu Yanhua, deputy director of the National Space Administration.

Zhang Kejun, director of the National Space Administration, delivered a welcome speech and handed over the data of neutral atom analyzer to Sweden, handed over the data of neutrons dosimeter to Germany, and handed over the data of low-frequency radio spectrum analyzers to the Netherlands. Representatives of the three countries respectively gave a speech.

 

[JSCh]

haibaraemily
4月18日 21:31 来自 iPhone 7 已编辑
#2019中国航天日# 开会真是太累了…晚上回来瘫倒开始挑一些之前没详细公布or总结的#嫦娥四号# 信息…

图3：嫦娥四号目前3个月昼里分别行走的距离
图4：嫦娥四号着陆器@看星星的嫦娥 上的低频射电频谱仪开机情况→截止3月11日共开机385个小时（图3，4来自孙泽洲大佬的报告）
图5：鹊桥的结构
图6：鹊桥中继星目前的轨道维持情况→已工作约10个月，共完成超过33次轨道维持，每次都只消耗了约80克推进剂（对，halo轨道需要不断调整维持轨道的）。鹊桥原本的任务计划寿命是保3年争5年，目前看来5年没问题，甚至剩下的50公斤推进剂可以维持10年

图7：@月球车玉兔二号 在鹊桥的帮助下目前运行良好
图8：鹊桥目前的运行状况
（图5-8来自张立华老师报告）

hold on，一会儿还有一波哈

 

[JSCh]

From CNSA - China National Space Administration website,

-> Announcement of Opportunities for Scientific Payloads onboard Chang'E-6 Mission
​

 

[JSCh]

China航天
今天 10:40
玉兔二号预计明天12时17分 ， 将自主唤醒开展第五月昼工作。

China航天
Today 10:40

Yutu no. 2 expected to wake up tomorrow at 12:17, to start work for the fifth lunar day.

​

From CASC, photo taken by Queqiao relay satellite. The one closer in white text is the moon, and the further one in blue text is Earth. Queqiao satellite can relay radio signal to and fro from Moon to Earth and vice versa, because it can see (or has line of sight) of both Earth and Moon at the same times.

 

[JSCh]

From 玉兔二号月球车今日下午自主唤醒 开展第五月昼工作 | 中国探月工程 (CLEP),

玉兔二号月球车已于4月28日13时45分自主唤醒，中继前返向链路建立正常，整器状态正常。玉兔二号月球车将开展第五月昼工作，继续实施巡视科学探测任务。截至目前，玉兔二号月球车已累计行走178.9米，超期服役近一个月。后续，科研人员将精确操作，严密监控，确保玉兔二号月球车走的更远，取得更多科学成果。

着陆器预计于4月29日7时唤醒。

The Yutu No. 2 lunar rover has autonomously awakened at 13:45 on April 28, the relayed communications link is established, and system state is nominal. The Yulu No. 2 lunar rover will carry out the fifth lunar day of work to continue to carry out the scientific investigation mission. Up to now, the Yulu No. 2 lunar rover has traverse 178.9 meters in total, and has served for nearly one month over designed-life. In the follow-up, the scientific research personnel will operate accurately and closely monitor to ensure that the Yutu No. 2 lunar rover goes further and achieve more scientific results.

The lander is expected to wake up at 7 o'clock on April 29.