On 08/03/15 12:24, Roger Hayter wrote:

I suspect that the sort of precision with which one can measure signal
strength. plus very local variations of surface wave intensity due to
varying ground conditions, mean that it would be hard to know if the
signal level resulted from, say, one, five or fifty percent of the
transmitted power.

So I suspect your question has never been answered.

But somebody must have done the research, somewhere...

An opportunity for some collaborative research between local amateurs?

No-one wants to run verticals...too difficult....

A 160m vertical aerial feeding a webSDR, located somewhere near the
centre of England, would, using surface (redacted) have a
fair-to-considerable percentage coverage of the UK Amateur population
and be very useful as a test-bed. Sadly, I don't live near Coventry,
although I've been sent there once or twice. The usual webSDRs seem to
run on horizontals, unsurprisingly, so not a lot of use for this sort of
thing.

--
Spike

"Hard cases, it has frequently been observed, are apt to introduce bad
law". Judge Rolfe