Topband: Fwd: Re: Skywave vs. Earth Conductivity

[K1FZ-Bruce]

Better, these look more like measured signal levels,

The sky wave plot looks like a use of a drafting compass.  Actual 
measurements would reflect slight aircraft measurement irregularities. 

Thanks for the info. 

73
Bruce-K1FZ
www.qsl.net/k1fz/pennantnotes.html

On Sat, 14 Feb 2015 04:23:08 -0600, Richard Fry <rfry at adams.net> wrote:
> 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. 
> ________
>
> 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 _________________
> Topband Reflector Archives - http://www.contesting.com/_topband
>
>

 

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