reply to post by Hellhound604
If by op, you mean Allison Barrie, the writer of the article on fox news, then yes I agree. I think the original problem of the ATS op was getting
scientific information from a fox news writer lol. She talks about wifi, cellphone, tv, gps, and radio signals like they are all different things,
but really, they are all just radio waves.
reply to post by PaperbackWriter
Oh PaperbackWriter, where to begin, where to begin. I think i'll just do this point by point. Firstly ALL gps, cellphones, satellite television,
Radio, and wifi use radio waves to transmit information. They all use different and specific frequencies, but none the less, radio waves. And we do
this by "modulating" the information we want to send, into these waves.
Why would cell and GPS service ever be "spotty" if they are truly linked by satellites that "blanket" the Earth?
This does not surprise me that they would say that they can use "radio signals" instead.
They are spotty because we do not live in a vacuum. If reception is spotty it is due to a blocking of the signal, a weak signal, or a wave that has
been naturally "modulated" due to its interaction with a variety of things in our environment, or the doppler effect. And once again, its not radio
signals instead, its radio signals of varying wave lengths.
Let's just say that if there were satellites above that relayed signals over the Earth your GPS should have worked.
But, since we know they rely on relay cell towers and you weren't near one that that would account for lack of signal.
I have already stated the various reasons that ANY radio frequency device, not just gps, would not work. You are only considering lack of signal
strength in your assumption. And yes, GPS do use earth based towers as well to "triangulate" positions. Not angulate, not bi-angulate, but
triangulate, meaning to calculate based on 3 or more points. And the frequencies used from those towers are not cell frequencies, they are the same
designated gps frequencies shot out from the satellites.
Why do satellites in general when attached to homes face out instead of up?
Because they are using Earth bound relay systems.
First, that is not a satellite, that is a parabolic reflector, more commonly known as a dish. A satellite is an object in orbit. And your flip
flopping back in forth between gps and satellite tv clearly shows a lack of understanding of your own ideas. Satellite television works slightly
different than gps, it is shot from the earth, to the satellites and then to your receiver. And they are slanted because the earth is not upright, it
is tilted, and as such, the satellites above us are angled as well.
If GPS were " satellite" based, why would the signal NEED to travel through mountains?
Mountains would only be a hindrance to ground based relay systems.
I don't understand what you are trying to ask. Radio waves CAN'T travel through mountains, and yes, because of this, it is a hindrance to ground
based radio systems. What is your point? Please elaborate.
I, no longer believe this garbage. He would definitely be lacking since the GPS is really a ground based relay system that does not rely on the
ridiculous need for a satellite to be say 28,000 miles above him.
I don't know where that number came from, but it is really actually not ridiculous at all to presume you need a 10,000+ mile vantage point to
communicate with the 196,900,000 square mile entirety of the earth. The only ridiculousness i see is presuming towers would be able to communicate
with each other across that distance. And thats really the reason for GLOBAL positioning anyway, sure we can achieve assistants and local positioning
from ground based towers, but we wanted it to be GLOBAL, not continental. Another reason for their high altitude, they have to communicate AROUND the
globe, not through it.
Thereby negating pinpoint accuracy of say a triangulation.
This is actually why GPS satellites have started sending out two frequencies for a single calculation. We can calculate the error using multiple data
If you are standing with a transponder in your backpack broadcasting a signal, how do you know if the signal
I am going to stop you there, i don't think you know what a transponder is. Tell me why you are using this transponder and for what and we can go from
Or simply bounce off the ionosphere and return to Earth?
What determines this?
The strength and trajectory of the signal.
edit on 3-12-2012 by twistedlogic because: (no reason given)