[HCDX] Re: Antipodal Focusing

["Glenn Hau-ser" <ghauser@xxxxxxxxxxx>]

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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