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Signal Propagation Time

A finite amount of time is required for a signal to travel from one place to another. In a vacuum, electromagnetic energy travels at 2.9979*108 m/s. The following equation holds for signal propagation time in a vacuum, where the dielectric constant is 1.


Signal Propagation Time - RF Cafe


If a radar type system is being evaluated where a round trip out and back needs to be accounted for, then double the distance figure. A "radar mile," which is a nautical mile out and a nautical mile back, is 12.36 μs.


Here is a 1-way propagation time calculator.

Here is a 2-way propagation (round-trip) time calculator.



Note: Only enter values in the yellow cells or risk overwriting formulas!

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