Roy, W7EL wrote:
I haven't looked into this carefully, but one person I know who was very
involved in NVIS operation (where ground characteristics are important)
tried it some years ago. He concluded that it wasn't possible to
set the antenna height and make measurements with sufficient accuracy to
infer the ground characteristics with any confidence.

Roy Lewallen, W7EL

Understood, Roy, but was this person saying that with just one height it
wouldn't give sufficient accuracy, or is he saying that with impedance knowledge
at many different heights there would still be no determination of any of the
ground characteristics?

Would you not like to see my data before concluding it couldn't reveal any
ground characteristics.?

Walt