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

U did claim that a delay was the reason for using a relay satellite. U need to come out of your indoctrination. Its unhealthy and convinces no one.
You are saying it is instantaneous, I am saying, even with a relay satellite, there is significant delay and hence they can't even have direct control of the landing let alone real time transmissions of the landing.
 
航天面面观
20分钟前 来自 微博 weibo.com
说一下,上午发布的照片是地形地貌相机在1月4号拍摄的,在图片中可以看到玉兔二号在A点的转弯动作还没完成。玉兔二号10号0点醒了之后就围着着陆器开始拍摄了,现在应该走到着陆器正面了。 个人估计应该走了40多米了。
航天面面观
20 minutes ago from weibo.com

Let me say that the photo released in the morning was taken on January 4th. The picture shows that the turning action of Yutu No. 2 at point A has not been completed yet. On the 10th Jan at 00:00, Yutu No. 2 woke up and started moving around the lander. It should now be at the front of the lander. l estimates it would have gone more than 40 meters.
 
You are saying it is instantaneous, I am saying, even with a relay satellite, there is significant delay and hence they can't even have direct control of the landing let alone real time transmissions of the landing.
Even for a earth satellite their is no real time instructions being given. It's all preprogrammed right from launch.
For a earth satellite once preset GTO orbit is reached, then orbit is circulised and instructions are given. Till GEO is reached.
Instructions are stored locally in the orbiter and a closed loop is initiated till target is achieved.
But for rover on the moon, instantaneous instructions are viable.
 
Even for a earth satellite their is no real time instructions being given. It's all preprogrammed right from launch.
For a earth satellite once preset GTO orbit is reached, then orbit is circulised and instructions are given. Till GEO is reached.
Your two statements are contradictory, the top portion says NO REAL TIME instructions are given then the bottom statements says instructions are given. :D. I think you are confusing rocket launch sequence to satellite control and tracking. :azn:. Rocket is supposed to deliver the satellite to the correct orbit without any command unless you have a maneuverable upper stage like China, then when the satellite is in orbit, commands are given REAL TIME to commence service and correction if needed.

Instructions are stored locally in the orbiter and a closed loop is initiated till target is achieved.
But for rover on the moon, instantaneous instructions are viable.
Why is it viable? There is already a delay from earth to relay and relay to rover and then rover back to relay and relay back to earth? If it's viable then the Chinese would have done it, no? Every Indian is a space genius, even when none have even landed on the far side before. =)
 
Live: Chang'e-4, far side of the Moon & lunar exploration “嫦娥四号”特别节目——解密月球背面
CGTN
Started streaming 19 minutes ago

10:26 BJT on January 3, 2019, spearheading a new chapter of Moon exploration both for the country and the world. It has sent back the world's first close-up shot of the Moon's far side via the relay satellite Queqiao (Magpie Bridge) and will send back high-quality visuals on January 11. Join CGTN at 16:15 BJT on January 11 for a 45-minute special program on Chang'e-4, the far side of the Moon and the lunar exploration.
 
Live: Chang'e-4, far side of the Moon & lunar exploration “嫦娥四号”特别节目——解密月球背面
CGTN
Started streaming 19 minutes ago

10:26 BJT on January 3, 2019, spearheading a new chapter of Moon exploration both for the country and the world. It has sent back the world's first close-up shot of the Moon's far side via the relay satellite Queqiao (Magpie Bridge) and will send back high-quality visuals on January 11. Join CGTN at 16:15 BJT on January 11 for a 45-minute special program on Chang'e-4, the far side of the Moon and the lunar exploration.
Awesome, tell the genius above to check if instantaneous transmission is possible. It took them 10 seconds just to send a video command. I guess the Yindoos have vedic transmission. :rofl:
 
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Craters surrounding Chang'e-4 pose challenge to lunar rover
Source: Xinhua| 2019-01-11 16:15:41|Editor: Li Xia

BEIJING, Jan. 11 (Xinhua) -- Images sent back from China's Chang'e-4 show that the first-ever probe to soft-land on moon's far side is surrounded by lots of craters of different sizes, which pose a great challenge for future exploration of the lunar rover Yutu-2.

The probe, comprised of a lander and a rover, touched down at the preselected landing area at 177.6 degrees east longitude and 45.5 degrees south latitude in the Von Karman Crater in the South Pole-Aitken (SPA) Basin on the far side of the moon on Jan. 3.

The China National Space Administration (CNSA) Friday unveiled several images taken by the Chang'e-4 probe transmitted back via the relay satellite Queqiao (Magpie Bridge).

One of the published images is a 360-degree panorama which was pieced together from 80 photos taken by a camera on the lander after the rover drove onto the lunar surface, according to Li Chunlai, deputy director of the National Astronomical Observatories of China and commander-in-chief of the ground application system of Chang'e-4.

"From the panorama, we can see the probe is surrounded by lots of small craters, which was really thrilling," said Li.

One of the craters close to the rover Yutu-2 has a diameter of about 20 meters and a depth of about 4 meters. The rugged terrain will pose great challenges for planning the route of the rover, said Li.

Compared with the landing site of Chang'e-3, which was sent to the Sinus Iridum, or the Bay of Rainbows, on the moon's near side, fewer rocks can be found in the area surrounding Chang'e-4, indicating the landing area of Chang'e-4 might be older, said Li.

He said the Chang'e-4 landed at an altitude of nearly minus 6,000 meters. The deepest region on the moon, where there is an altitude of minus 9,100 meters, is about 700 kilometers to the south of the probe.

"The information from the depths of the moon will be one of our focuses in the exploration," said Li.
 
Awesome, tell the genius above to check if instantaneous transmission is possible. It took them 10 seconds just to send a video command. I guess the Yindoos have vedic transmission. :rofl:
Here is some 50 year old soviet rover description.

"Lunokhod 2 was equipped with three slow-scan television cameras, one mounted high on the rover for navigation, which could return high resolution images at different rates—3.2, 5.7, 10.9 or 21.1 seconds per frame (not frames per second). These images were used by the five-man team of controllers on Earth who sent driving commands to the rover in real time.[13] There were four panoramic cameras mounted on the rover."
https://en.m.wikipedia.org/wiki/Lunokhod_programme

In real time. You can thank me later. Always Happy to educate some hans.
 
China declares Chang'e-4 mission complete success
Source: Xinhua| 2019-01-11 16:45:51|Editor: Li Xia

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The screen at the Beijing Aerospace Control Center shows the Chang'e-4 lander (R) and the Yutu-2 rover taking pictures for each other, Jan. 11, 2019. (Xinhua/Jin Liwang)

BEIJING, Jan. 11 (Xinhua) -- China announced Friday that the Chang'e-4 mission, which realized the first-ever soft-landing on the far side of the moon, was a complete success.

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