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Here are a few more references to add to the discussion.
http://en.wikipedia.org/wiki/Horizon
http://www.firestik.com/Tech_Docs/dist2horizon.htm
http://www.rudhar.com/vizhoriz/vizho-en.htm
Wayne
HP-14 "6F"
http://www.soaridaho.com/
"RST Engineering" <jim@rstengineering.com> wrote in message
news:G3wNh.4$1e2.123001@news.sisna.com...
> The equation may be written in either of two common formats:
>
> h = horizon (in statute miles)
> a = altitude (in feet)
>
> h = sqrt (2*a)
>
> or
>
> h = 1.414 * (sqrt (a))
>
> If we are ballparking instead of surveying, we generally drop it to 1.4.
>
>
> Jim
>
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Re: theoretical radio range....
