Re: [TenTec] ground wave Mode? How to know?

[tongaloa <tongaloa@alltel.net>]

Stuart-

Yes, but there is also tropospheric ducting, atmospheric refraction, and 
scattering.
Ducting and atmospheric refraction  are pretty common, specially over
the ocean. Was wondering, in your experiments,  how you distinguish 
these from
the 'ground wave' which refers the radio wave that propagates along the 
surface.

For the bbenefit of other readers (based only on my limited knowledge of
radio physics so don't assume I'm an authority), the earth and 
atmosphere have
two different indices of refraction for radio waves and radio waves that 
are 'bent'
along the curvature of the earth because of this difference are what one 
commonly
refers to as 'ground waves'.

73,
-Bob
ah7i

Stuart Rohre wrote:

> Bob,
> very simple really.  When the band at 10m is open for skywave, then you hear
> the distant stations in multi hop skip zones, and you can tell by their
> calls or QTH reports.
>
> When 10m band noise causes AGC to run open, and you are not hearing any
> other stations except close by stations, then you have ground wave
> operation.  100 miles is well under the typical first hop skip distance at
> 30MHz.
> 73,
> Stuart Rohre
> K5KVH
>
>
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>  



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