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Old 17th August 2010, 12:58 AM   #11
Pano is offline Pano  United States
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That's exactly it!

And bandwidth is not a problem. They send full frame video. Getting voice is nothing.
But as T in AZ says, it can't sound too good, or we won't believe it.
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Old 17th August 2010, 01:10 AM   #12
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uuuuuh, is it SSB? they didn't have SSB in 1934. I don't even think they had DSB in 1934, just wonderfully modulated continuous wave with honkin' huge Collins transformers.
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Old 17th August 2010, 01:43 AM   #13
star882 is offline star882  United States
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Might it have something to do with the reduced pressure atmosphere? I believe the atmosphere onboard spacecraft is more or less pure oxygen with a pressure similar to the partial pressure of oxygen on Earth.
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Old 17th August 2010, 01:44 AM   #14
Pano is offline Pano  United States
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Not pure Oxygen! That went out with the Apollo One tragedy.
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Old 17th August 2010, 02:23 AM   #15
wwenze is offline wwenze  Singapore
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May I add - the video and audio transmissions must be done in analogue so that we get the white noise and crackle we are all too familiar with in sci-fi movies.

Oh and the white noise when the thing crashes. A blue screen is just so wrong.
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Old 17th August 2010, 03:02 AM   #16
Salas is offline Salas  Greece
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So its a party trick? Or the mics there don't pressurise? I mean the guys are floating around, are the capsules working right? Or they are on something like helium balloons inhaling?
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Old 17th August 2010, 03:06 AM   #17
imix500 is offline imix500  United States
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Also remember the technology used up there must be compatible with all the other nations involved. Some of which are more than a few years behind technologically. Also, it takes many years to develop and prove anything nasa uses. The radios used in the ISS were probably designed in the late 80's/early 90's. I actually have a couple insiders into this stuff. I'll ask them.
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Old 17th August 2010, 03:11 AM   #18
Pano is offline Pano  United States
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Cool. Please do ask. I know someone I can call in Alabama who might know. Worth a shot.

BTW, I'm glad I"m not the only one who has noticed this!
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Old 17th August 2010, 03:16 AM   #19
imix500 is offline imix500  United States
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Heh, yeah I'm from Huntsville. Raised by a Nasa dude.
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Old 17th August 2010, 05:02 AM   #20
T in AZ is offline T in AZ  United States
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Well it is a mystery, Boeing: NASA Systems - International Space Station - Communications and Tracking
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