Re: Relative Positioning


<mattrapoport@xxxxxxxxx> wrote in message
news:f213ea81-0546-4397-aa5f-53e4b9a28368@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
If I take an RF transmitter (A) and an RF receiver (B) and I precisely
record the time it takes for the the signal to get from A to B, I
wonder how accurate the distance measurement would be. If I moved A
1mm away from B, would the recorded time accurately represent the
change in distance?

Yes, but....

Your 1mm distance would represent 3.33x10^-11 seconds at the speed of light
(elecromagnetic radiation, including radio waves). That's about 0.033
nanoseconds (unless my math fails me). Can you measure time differences
with enough accuracy to reliably measure that kind of difference?

Jim


.

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