RE: [HCDX] Re: Antipodal Focusing

["Charles Hutton" <charlesh3@xxxxxxx>]

Since an antipodal path length is 12,500 miles and the error between the
true antipode and the antipode proposed earlier by Mr. Giella is over 3,000
miles, I know I would not consider his example to be anywhere near
antipodal.

I don't know of any previous claims that antipodal effect extend that far. I
wish it did, as southeastern Africa would be most welcome here.


Chuck

-----Original Message-----
From: hard-core-dx-bounces@xxxxxxxxxxxxxxxx
[mailto:hard-core-dx-bounces@xxxxxxxxxxxxxxxx]On Behalf Of Thomas Giella
KN4LF
Sent: Saturday, September 06, 2003 4:09 AM
To: a Topica ABDX E-List; a HCDX E-List
Subject: Re: [HCDX] Re: Antipodal Focusing


Glenn  And All,
  Yes you are being a stickler. Yes I didn't pick the best path example for
antipodal focusing BUT in my mind as a teacher I was trying to pass along an
idea in a simple form, in layman's terms that popped into my head at the
moment. Yes I'm still suffering from a summer flu and am not on my toes. Yes
I think you are flaming me because our political ideologies differ.

73,
Thomas F. Giella, KN4LF
Plant City, FL, USA
EL87WX

KN4LF Daily Solar Space Weather & Geomagnetic Data Archive &
Daily HF/MF Radio Propagation Outlook:
http://www.kn4lf.com/kn4lf5.htm


----- Original Message -----
From: "Glenn Hau-ser" <ghauser@xxxxxxxxxxx>
To: <hard-core-dx@xxxxxxxxxxxxxxxx>
Sent: Friday, September 05, 2003 10:43 PM
Subject: [HCDX] Re: Antipodal Focusing


>
> I don`t think I`m being too much of a stickler to point out that the
> antipodes of Plant City out in the Indian Ocean west of Australia, at
about
> 28 S, 98 E, is more than 3000 miles, 5 megameters, from Udorn, Thailand.
> This is ``NEAR``??
>
> Grayline enhancement is a far more likely explanation, and this happens
over
> paths much shorter than antipodal.
>
> I can`t speak to 160m contact experience, but I`ll bet the signals from W
&
> C Australia are coming from close to the true azimuth, and not from random
> or any/multiple azimuths as would be the case with true antipodal
focusing.
> Have you checked this with your 160m beam?
>
> I`m with Walt about antipodal focusing being from a tight area. During his
> period of activity from Hawaii, Richard E. Wood also made much of
antipodal
> reception from Zambia.
>
> As for programs about propagation prediction, I think experience and
> understanding the basic principles are more useful.
>
> 73, Glenn Hauser
>
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