It is a known that the ionosphere is not a perfect sphere. It is always
moving and it is lumpy and tilted. Together these occurrences can cause
focusing and defocusing of the wave due to deformities especially if they
are concave or convex. One-way-propagation can reveal itself as a deep
and/or prolonged fade on only one end of the link because of the
aforementioned reasons. Of course fades can be caused by other reasons,
such as multiple paths, etc.
I can't recall anyone who has made a study of this citing that as a reason
for non-reciprocity, and Carl's recent post about a broadcast study said the
effect someone reported seeing was only on a west-east path and no one knew
why. The reasons theorists have cited have only to due with gyrorotation.
I'm not saying you are wrong, but what have they missed to not bring the
issues you highlight up? In all of the conditions you mention, what specific
mechanism causes a path to be non-reciprocal at any instant of time?
I know why things like lossy networks can be non-reciprocal in impedance,
but what is the mechanism at work?
73 Tom
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Topband reflector - topband@contesting.com
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