Hi Russell,

Yes, it deals with fresnel zones.

It is freeware, meant for specifically determining the coverage of 
different systems over fixed paths using dted files. After you set up 
the parameters on both ends of the path, including tower height), you 
enter the frequency and you get the expected signal strength.

Regards,

Art

At 04:33 AM 9/26/2006, you wrote:

> >>You can do 30 miles LOS if you are high enough at each end and there
> >>are no high spots too close to the ends. Fresnel zones that occur if
> >>you don't meet the preceding requirememnts kill your link quite well
> >>in most cases.
>
> > There are a few small bumps that nearly
> > block the path, so tree attenuation will be an issue possibly.
>
>If your program can deal with Fresnel zones that's fine.
>If not then intermediate points that  " ... nearly block the path ..."
>need to be analysed for Fresnel Zone problems - this can make  a path
>unusable even without trees etc.
>
>Basically the issue is mulipath signals which interfere in an
>undesirable manner. Murphy is expert at doing this.
>
>
>
>         Russell
>
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