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Re: Topband: Skywave vs. Earth Conductivity

To: <topband@contesting.com>
Subject: Re: Topband: Skywave vs. Earth Conductivity
From: "Richard Fry" <rfry@adams.net>
Reply-to: Richard Fry <rfry@adams.net>
Date: Sat, 14 Feb 2015 04:23:08 -0600
List-post: <topband@contesting.com">mailto:topband@contesting.com>
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
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