Author Topic: Chang'e-4 lunar operations  (Read 68769 times)

Offline cjx007

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Re: Chang'e-4 lunar operations
« Reply #240 on: 01/11/2019 07:51 am »
officially aannounced engineering phase successed, sciences research phase begins.

Offline pyr0bee

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Re: Chang'e-4 lunar operations
« Reply #241 on: 01/11/2019 07:55 am »
have to say this live stream was extremly satisfying. Plethora of new videos were released

Offline frensel

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Offline wahaha

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Re: Chang'e-4 lunar operations
« Reply #243 on: 01/11/2019 08:45 am »

Offline SciNews

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Re: Chang'e-4 lunar operations
« Reply #244 on: 01/11/2019 08:59 am »
Chang’e-4 landing (Onboard Camera View)

Online ugordan

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Re: Chang'e-4 lunar operations
« Reply #245 on: 01/11/2019 08:59 am »
Youtube mirror of the landing video. Note that the footage is sped up 2.5x as the original frame rate is 10 fps and played back at 25 fps in the video.


Offline wahaha

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Re: Chang'e-4 lunar operations
« Reply #246 on: 01/11/2019 09:16 am »


Offline chetan_chpd

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Offline Alter Sachse

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Re: Chang'e-4 lunar operations
« Reply #249 on: 01/11/2019 09:42 am »
Chang’e-4 landing (Onboard Camera View)

landed 02:25:53 ?

Online ugordan

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Re: Chang'e-4 lunar operations
« Reply #250 on: 01/11/2019 10:00 am »
Full res images:

Offline wahaha

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Re: Chang'e-4 lunar operations
« Reply #251 on: 01/11/2019 11:13 am »
In this photo released by Xinhua News Agency, the screen at the Beijing Aerospace Control Center shows the lander of the Chang'e-4 probe, right, and the rover Yutu-2 (Jade Rabbit-2) taking photos of each other, Friday, Jan. 11, 2019.

Offline eeergo

Re: Chang'e-4 lunar operations
« Reply #252 on: 01/11/2019 11:21 am »
Youtube mirror of the landing video. Note that the footage is sped up 2.5x as the original frame rate is 10 fps and played back at 25 fps in the video.



You can see how the probe hovers for a few seconds what looks like a few meters from the ground, while (presumably) the onboard hazard avoidance routine kicks in!
-DaviD-

Offline eeergo

Re: Chang'e-4 lunar operations
« Reply #253 on: 01/11/2019 11:25 am »
Full res images:

Look at that long pole following the left horizon in the second image :D
-DaviD-

Offline eeergo

-DaviD-

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Re: Chang'e-4 lunar operations
« Reply #255 on: 01/11/2019 11:48 am »
You can see how the probe hovers for a few seconds what looks like a few meters from the ground, while (presumably) the onboard hazard avoidance routine kicks in!

If the Chang'E 3 landing is anything to go by (it's the same architecture), that hover happened at 100 m altitude.

Offline eeergo

Re: Chang'e-4 lunar operations
« Reply #256 on: 01/11/2019 12:26 pm »
You can see how the probe hovers for a few seconds what looks like a few meters from the ground, while (presumably) the onboard hazard avoidance routine kicks in!

If the Chang'E 3 landing is anything to go by (it's the same architecture), that hover happened at 100 m altitude.

It looked lower than that to me when played in real time, but it's surely difficult to judge with the almost fractal lunar terrain -- although the hover happened at the point where the appearance of progressively smaller craters gave way to small-scale features like rocks.


EDIT: In fact, judging from this very not-to-scale diagram I found after posting (from here), it looks like the final avoidance phase would start with LIDAR at 100 m but the hovering would be at lower altitudes.
« Last Edit: 01/11/2019 12:32 pm by eeergo »
-DaviD-

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Re: Chang'e-4 lunar operations
« Reply #257 on: 01/11/2019 12:40 pm »
Here's the previous landing for reference, altitude is marked in the lower right:


Offline eeergo

Re: Chang'e-4 lunar operations
« Reply #258 on: 01/11/2019 12:44 pm »
Here's the previous landing for reference, altitude is marked in the lower right:

I think you converted me, I see now :) Thanks for the comparison!
-DaviD-

Offline Satori

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