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[aprssig] PHG calculation formula?

Gregory A. Carter aprssig at gcarter.infodns.com
Tue Oct 24 23:33:33 UTC 2006


Here's the snippet that calcs it from OpenAPRS's daemon...

  power = pow(base_power, 2.00);
  haat = (10 * pow(2.00, base_haat));
  gain = pow(10.00, (base_gain / 10));
  range = sqrt((2 * haat * sqrt((power / 10) * (gain / 2))));

73

Greg
N7NXS

On 10/24/06, Alan P. Biddle <APBIDDLE at mailaps.org> wrote:
>
> I was looking for the formula which is used for the PHG values for the
> beacon.  No problem finding a site which would calculate it, but I flunked
> Google 101 on the formula itself.
>
> TNX
>
> Alan
> WA4SCA
>
>
>
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