Gene Fuller wrote:
1. The classic relationship between current and voltage in a reactive
environment.

Very difficult to measure on an antenna.

2. The time and space connection in a traveling wave, the "kz-wt" term.

Can be used to measure the delay through a loading coil.

3. The amplitude shape factor in a standing wave, the "kz" term.

Can be used to roughly estimate the delay through a loading coil.
The "wt" term of the standing wave cannot be used to measure
the delay through a loading coil.

4. Fixed offsets that effectively show different starting times for
waves. For example, "kz-wt" vs. "kz-wt-d".

Or the difference between the phase of a traveling wave entering
a loading coil and that traveling wave exiting the loading coil.

5. The sign reversal every half-wave on a long antenna. This is merely a
reflection of the periodic nature of a cosine function, but it is often
called a "phase reversal".

The same thing happens in a transmission line with reflections.
--
73, Cecil http://www.qsl.net/w5dxp