Originally Posted by hak8or
How exactly would they use light to transmit data? Unless you are talking about the electromagnetic spectrum, or something like that.
But still, how do they transmit data to and fro an object traveling at such high speed? Do they run into doppler effect problems?
Radio waves travel at the speed of light...I am pretty sure that's what they use, radio waves (part of the electromagnetic spectrum), to transmit the various signal(s). I don't think the Doppler effect would apply to something that travels as fast as the speed of light. The velocity of the traveling radio waves would be so great as it wouldn't matter the velocity of the moving object (the rocket), so the Doppler effect wouldn't apply (or I could be wrong...).
Ooops...I was wrong. Doppler effect does apply but the equation is changed a bit...and goes under the presumption that the distance between the source and receiver is large relative to the wavelength of the waves and I'm guessing they would be using satellites to communicate so the change in frequency can probably be compensated for.
Originally Posted by Gizmo
Can someone fill me in on why everyone is referencing the speed of light when someone asks about data transfer from something going this fast? Is someone presuming they have a rather large spool of fiber optic cable laying around?
Again, radio waves, the method of communication between said vehicle and mission control, travels at the speed of light as it is part of the electromagnetic spectrum.Edited by Aznboy1993 - 8/11/11 at 8:33pm