The Moon

[nwgs]

It was 10 years ago on the far side of the moon, also tracked by NASA.

How does that have an effect on the camera ? You’d think China would be able to make a decent camera for the job by now.

 

[denso13]

How does that have an effect on the camera ?

No idea, it was just a comment. What camera did they use?

 

[nwgs]

No idea, it was just a comment. What camera did they use?

I’ve no idea. My point is the picture quality is shocking given the year.

I wonder why it’s not manned ?

 

[nwgs]

The mars rover is far superior and a lot further away.

 

[denso13]

Some hi res photos here.

Chinese photos show moon's surface in vivid detail | CNN

China has released hundreds of high-resolution photos taken by its Chang'e-3 lunar lander and rover, showing the moon's surface in vivid detail.

edition.cnn.com

 

[nwgs]

Some hi res photos here.

Chinese photos show moon's surface in vivid detail | CNN

China has released hundreds of high-resolution photos taken by its Chang'e-3 lunar lander and rover, showing the moon's surface in vivid detail.

edition.cnn.com

Cheers for that. But still, why would the landing be in black and white, the module looks as bad as the Apollo ones.

But tricky dickie called on a land line. So I’ll take it as gospel.

 

[SFK]

High quality video signal needs high data rate.
High data rate needs more power.
Sending signal further needs more power.
Colour needs more processing chips and more data which needs more power.
High data rate and sending video a long way into the sky to moving orbiting repeater spacecraft needs a lot more power.

Lunar module does not have a lot of power as batteries and solar panels are heavy.

Hence 'live video' from moon is intentionally selected to be lower quality (sometimes even black and white) as there is limited power and it is a long transmission distance.

Still Images are typically high quality as they contain the information they want and so are buffered and then sent with slow (lower power) data rate. But you get less images as you increase their size and quality as bandwidth (amount of data you can send) is fixed by the amount of power you have.

 

[nwgs]

High quality video signal needs high data rate.
High data rate needs more power.
Sending signal further needs more power.
Colour needs more processing chips and more data which needs more power.
High data rate and sending video a long way into the sky to moving orbiting repeater spacecraft needs a lot more power.

Lunar module does not have a lot of power as batteries and solar panels are heavy.

Hence 'live video' from moon is intentionally selected to be lower quality (sometimes even black and white) as there is limited power and it is a long transmission distance.

Still Images are typically high quality as they contain the information they want and so are buffered and then sent with slow (lower power) data rate. But you get less images as you increase their size and quality as bandwidth (amount of data you can send) is fixed by the amount of power you have.

How does the Rover get better quality.

And you’d think they would record some in 4k ?

 

[SFK]

4 Seconds of 4k video at 25fps would be 100 images of almost the same thing, with movement artifacts, and would take 'days' to download. And they do not want or need that type of information.

The scientists want still images of lots of different things in high quality. So they use the limited bandwidth to get very carefully selected high quality still images.

 

[robinbanks]

Also it's 360p YouTube; heavily compressed and not even as many lines as an old VCR

 

[IT Minion]

How does the Rover get better quality.

And you’d think they would record some in 4k ?

It's around 10x as large and a decade more modern.