To: | <[email protected]> |
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Subject: | LF: Path to Shetland |
From: | "Alan Melia" <[email protected]> |
Date: | Sat, 14 Jul 2007 17:06:58 +0100 |
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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 |
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