OT: GoPro Space Jump Video - Incredible
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deusx
wrote on 2/3/2014, 1:33 AM
>>>According to Wikipedia, orbiting objects 100 miles up ("Low Earth Orbit," or LEO) experience rapid orbital decay due to atmospheric drag. This altitude is where nearly all the astronaut flights took place and where the Space Station is. So there are still air molecules at this height, four times higher than this jump.<<<
Had to check, Space station is at at least 330km above sea level and sometimes over 400km, so it's more around 10 times as high as this drop. Orbital decay listed as 2km per month.
Had to check, Space station is at at least 330km above sea level and sometimes over 400km, so it's more around 10 times as high as this drop. Orbital decay listed as 2km per month.
GeeBax
wrote on 2/3/2014, 4:01 AM
Space station is at at least 330km above sea level and sometimes over 400km, so it's more around 10 times as high as this drop. Orbital decay listed as 2km per month.
So how does that work? Does one of the residents have to get out and give it a shove from time to time?
So how does that work? Does one of the residents have to get out and give it a shove from time to time?
NormanPCN
wrote on 2/3/2014, 5:32 PM
The ISS has engines of its own to give itself a push and resupply vehicles also give a push while attached.
GeeBax
wrote on 2/3/2014, 5:42 PM
(it was a rhetorical question)
sodbuster-ca
wrote on 2/3/2014, 11:27 PM
musicvid10,
I remember this. It was a big deal at that time. The Science Channel and Discovery Channel ran adds promoting this jump. On the day of the jump, they pre-empted other programming to broadcast the jump as as Live event.
Those channels rarely do Live broadcasts. Of course I watched the live show (being a science nerd & retired technocrat). IIRC, the live broadcast showed different footage than the YouTube video you posted. Of course, the footage I saw would have had to have come from cameras connected to an up-link transmitter for live broadcast.
I remember this. It was a big deal at that time. The Science Channel and Discovery Channel ran adds promoting this jump. On the day of the jump, they pre-empted other programming to broadcast the jump as as Live event.
Those channels rarely do Live broadcasts. Of course I watched the live show (being a science nerd & retired technocrat). IIRC, the live broadcast showed different footage than the YouTube video you posted. Of course, the footage I saw would have had to have come from cameras connected to an up-link transmitter for live broadcast.
riredale
wrote on 2/4/2014, 12:44 PM
Not wishing to be nitpicky but actually I wasn't that far off (regarding my 99.9% percentage guesstimate of atmosphere below; I'm wrong on whole host of other topics, as my wife constantly reminds me).
Per this page, for every 5.6km of ascent you halve the mass of atmosphere above you.
So going up to 39km means the "halving" effect happens 39 / 5.6 = 6.96 times.
Now, 2 ^ 6.96 = 124, meaning that 1/124th of the atmosphere is still above you at 39km. That means 123/124th is below, or 99.2% is below.
All this discussion is making me want to see that Sandra Bullock movie "Gravity" when it comes out on DVD. I'm sure she would have an opinion.
Per this page, for every 5.6km of ascent you halve the mass of atmosphere above you.
So going up to 39km means the "halving" effect happens 39 / 5.6 = 6.96 times.
Now, 2 ^ 6.96 = 124, meaning that 1/124th of the atmosphere is still above you at 39km. That means 123/124th is below, or 99.2% is below.
All this discussion is making me want to see that Sandra Bullock movie "Gravity" when it comes out on DVD. I'm sure she would have an opinion.