Re: [Trisquel-users] A phone without GPS

[shiretoko]

Since we're talking about electro-magnetic waves (or am I completely  
mis-informed?), doppler effect is completely unsignificant considering the  
velocities of the sender and observer on earth (cars etc). You can messure a  
redshift only observing stars moving away from the earth.

Anyway, it would only be possible finding out about the velocity of the  
cellphone with help of the doppler effect, nothing more.
But if you are better informed than me and have further information, I'm very  
interested.