Re: [IRCA] [NRC-AM] Recent DXpedition to Grayland, WA & Florence, OR

[Nick Hall-Patch <nhp@xxxxxxxx>]

I suspect that the Florence location suffered somewhat from being 1000 feet
inland, Gary and Bill.  My limited experience has been that you're generally
better off being right at the coast for the best DX, although Gary's experience
seems to point to an advantage to being right at the coast and higher up, and
that phenomenon certainly needs to be looked at more carefully.  

There was a research paper done years ago by the BBC, I believe, showing the
"coastal effect" as a wavefront moved from the water to the land, and although
there were peaks in signal strength as one moved inland, their location depended
on the frequency of the received signal, were compensated for by  lower signal
strength in the area between the peaks, and, overall signal strength dropped the
further inland one went.   I'll look it up again when I'm home; I have a vague
recollection that cliffs might have been incidentally involved, though I don't
think that clifftop vs. seashore was investigated.

best wishes,

Nick

Quoting d1028gary@xxxxxxx:

> Hi Bill,
> 
> Thanks very much for your detailed investigation of relative DU signal
> strengths at the 800 ft. high ocean coast elevation near Florence and
> at the much lower elevation near the Grayland Motel. I'm sure that your
> detailed work will be very helpful in clarifying the principles
> affecting ocean cliff propagation. Thanks also for posting the links to
> many Australian and New Zealand signal recordings made at each
> location, all of which are most interesting. Having recently gone
> through the process of recording and posting many MP3 recordings from
> the recent Cape Perpetua ocean cliff DXpedition, I can certainly
> appreciate all the time and effort that was required.
> ....................


-- 
Nick Hall-Patch
Victoria, BC
Canada

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