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From: "Alan Melia" <alan.melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
Date: Sat, 14 Jul 2007 17:06:58 +0100
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Subject: LF: Path to Shetland
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Hi Dave (and Dave !) Interesting that there seems little fading but I am not
really surprised, I guess being daylight the lower ionosphere is fairly well
ionised and doing all the reflections. What I would be very interested to
see on a path of nearly 100km is whether the night-time signals suffer
significant fading at this range. The fading is probably due to returns from
two layer, and I am guessing this is worse at short distances where more
signal probably passes through the lower layer. At shallower angles like
that for the near 1000lm path to John I am hoping that less signal will get
through the lower layer/ there may well be fading but the return from the
upper layer may be weaker at this range leading to shallower fading. I could
just be totally wrong, but the proof is in the practical results. It will
only be a guide as John still barely has any night time and I am guessing
that the upper reaches may still be illuminated quite a long way south.

 This is what its all about !!

Cheers de Alan G3NYK