How 'bout you model it with your concept of an "artificial ground", and
let us know the result? You can measure the voltage with EZNEC by
connecting the two points to be measured with a wire and inserting a
zero amplitude current source in the wire. The source will act like an
open circuit, and the voltage will be reported in the Source Data output.

After you've determined the voltage relative to your "artificial
ground", modify the "artificial ground" and note the effect on the
voltage. Then see if you can figure out what the voltage is between the
"artificial ground" and the Earth. Or, give us your justification for
assuming that it's zero. If it is zero, via what path? As Tom has been
saying, the voltage between two points depends on the path you take
between them.

Roy Lewallen, W7EL

Cecil Moore wrote:
Ian White, G3SEK wrote:

In practice that will means that the voltage you measure between say
the end of a whip and ground will depend on how you choose to route
the connecting leads to the voltmeter, and how you connect to
ground... and above (below?) all on what you define "ground" to be.


How about using an artificial ground at the measurement point?
--
73, Cecil, W5DXP