[time-nuts] ARRL FMT results
Hal Murray
hmurray at megapathdsl.net
Thu Jan 4 17:19:13 EST 2007
> But there's a finite amount of time between when the signal is
> transmitted and when it is received. During this time, the earth
> rotates, thus bringing the receiver either closer to or farther away
> from the transmitter. Doesn't that cause a frequency shift? Isn't
> this the Sagniac effect? Small, but measurable as it is a
> relativistic effect, no?
Is that a frequency shift or a phase shift?
The transmitter is moving at the same speed as the receiver. That motion
changes the transit time between the pair, but if the velocity is constant,
that makes a time/phase offset rather than a frequency offset. Do get a
frequency offset you want a Doppler where one end is moving relative to the
other.
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