Topband: Skywave vs. Earth Conductivity

[Richard Fry]

>Lower angle skip, such as WFAN being received in Europe, Africa, Caribbean, 
>etc. would definitely be affected.  In the extreme, the shape of the 
>antenna pattern would look more like the one for groundwave.
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Below is a link showing the complete 0.15 mV/m groundwave contour of WFAN, 
to approximately the same map scale as the skywave chart linked earlier.

Note that even though this GW field intensity is lower than the 0.25 mV/m 
contour shown for the 50% nighttime skywave of WFAN, the distance along the 
surface of the ocean to that GW contour is less than for the skywave contour 
for those paths.

http://s20.postimg.org/r9ceghfu5/WFAN_Groundwave.gif