NASA using green screen to fake ISS experiment footage

ki_cz

Member
This is a clip that is starting to make the rounds. It's clear that the grid is there to assist with calculating the results of an experiment, but I was hoping that maybe somebody would know exactly what kind of experiment is being conducted, or knows where to find the actual broadcast of what is being displayed:


Very short video, but the relevant section is from about 20-40 seconds.


Moderator add: Experiement is called Circular Motion.
Source: https://youtu.be/iginxrFn3jg?t=62
 
Last edited by a moderator:

Hevach

Senior Member.
I don't believe that's true.

But chroma key screens do tend to be different colours than the clothing of people stood in front of them.
They're usually solid, but not always.
From Wikipeidia:


This set has dots of several different colors. I assume to align the digital set to the physical one, but I'm not positive and the wiki article doesn't elaborate. I know some of the fancier ones that youtube streamers use have lines (there used to be a Star Trek Online podcast that looked like they were sitting on various bridges, and their screen had lines so they could do the camera shake explosion thing the shows liked so much.

In this case, however, it wouldn't work. You've got a blue screen with a prominent white grid behind a subject wearing a blue shirt with white markings. If they tried to use that as a bluescreen, the result would be something like this TV weather snafu:
http://www.nydailynews.com/news/nat...urce=fark&utm_medium=website&utm_content=link
 

jaceks

New Member
not sure if I understand this correctly, but does this video near the end suggests that based on some equipment position, NASA is using a blue screen to render ... more equipment and some flags? Wouldn't it be easier just to put the flags behind the astronaut?

Anyway, I think it's probably something like the measurement grid that mythbusters used all the time when filming moving objects. Known distances between the lines allows pretty precise measures of the movement speed of an object.
 

ki_cz

Member
not sure if I understand this correctly, but does this video near the end suggests that based on some equipment position, NASA is using a blue screen to render ... more equipment and some flags? Wouldn't it be easier just to put the flags behind the astronaut?

Anyway, I think it's probably something like the measurement grid that mythbusters used all the time when filming moving objects. Known distances between the lines allows pretty precise measures of the movement speed of an object.
I agree completely, hopefully the footage of the experiment will be available somewhere at some point.

I'm guessing that the point attempting to be made is that the 'green screen' can somehow be used to simulate zero gravity for these kinds of segments. But that's just my assumption, the video doesn't really show anything besides "hey look there's something in the background that is enough evidence for me to believe everything is faked!"
 

Hofnarr

Member
Video editing is a great thing, its no problem to just cut out the astrounaut and the ball, since most of the interior of the space station is white or gray. Laying a grid over the background is easy and very useful to see and calculate how things move.

As I mentioned the cutting out of the astrounaut and ball is an easy thing: chroma key's could be any colour, but he wouldn't be wearing a blue shirt on a blue screen this would make the whole chroma key unusable.

The other aspect. Look how the ball moves, he has the string in his hand. It wouldn't move like this down on earth.

Edit: Lookup the last link HeVach posted to see what I mean with "make the chroma key unusable"
 

Whitebeard

Senior Member.
Anyway, I think it's probably something like the measurement grid that mythbusters used all the time when filming moving objects. Known distances between the lines allows pretty precise measures of the movement speed of an object.
Think you have it spot on there. I've a bit of green screen work my self, mainly in a few music videos, and never seen one marked out with that kind of grid system in a filming context, but I have seen them in film of science experiments to show movement etc.
 

ki_cz

Member
Here is another video of the screen in use:


It definitely seems (as other have suggested) to be to provide more contrast for certain experiments/demonstrations.
 
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