On Sat, 19 Jan 2008 21:36:16 +0000, Billy Burpelson wrote:
Unfortunately, it seems like a rather meaningless comparison, as the
terrestrial signal can be all over the board due to the vagaries of
propagation. Sort of like measuring something with a rubber ruler... :-)

Doug Smith W9WI wrote:

True enough, though I would suggest the same would apply to the lunar
signal. The Moon isn't perfectly flat - and any signals bounced off it
have to pass through the ionosphere (twice).

No, the moon certainly isn't flat, with a radio reflectivity of about 7%.

Additionally, the effects of libration of the moon can cause the signal
to fluctuate a bit.

I would suggest the purpose of the graph was to show in general terms how
to identify whether you were hearing the HAARP signal or not, and if you
were, whether it was the terrestrial signal or the lunar signal. (or both)

Agreed. They just didn't label it properly; as 'I.H.' (the HAARP
spokesperson) stated in his response to me: "I'll need to add some
clarifying information to the figure, I can see".