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Old Oct 23, 2009, 05:43 AM
Hueber is offline
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Switzerland
Joined Oct 2006
16 Posts
Yes, it can make a big difference, especially if you're flying low! Line of sight is only half the truth, you need also free space over and UNDER this line. Otherwise, you can loose up to 6dB, which results in half the range, even if you have direct sight to the plane.
See here: http://en.wikipedia.org/wiki/Fresnel_zone

Cheers, Roman
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