[aprssig] PHG calculators

Heikki Hannikainen hessu at hes.iki.fi
Mon Jan 12 11:12:21 EST 2009

On Mon, 12 Jan 2009, Jan T. Pharo wrote:
> "Dave Baxter" <Dave at emv.co.uk>, Mon, 12 Jan 2009 10:52:16 -0000
>> Does the PHG calculator at:-
>> http://www.perite.com/vk7ybi/dev/phgcalc.htm
>> do it right?, especialy for non omni antennas.
> East made a 3 which is correct AFAIK.
> However, it doesn't include a fifth digit (for the number of beacons
> per hour); I think that's within the standard. aprs.fi doesn't like
> that fifth digit, though.

Well, it's not that it didn't like it, it just didn't show it on the 
map. It was parsed and stored in the database, I just forgot the 
presentation. But it's there now. I added directivity support in the 
plotting around Christmas, too (with fancy cardioid patterns).

The calculator at http://www.apritch.myby.co.uk/phgrcalc.htm includes 
support for rate. The power selection is funny, though, the steps are 
10-15-25 W, and both 10 W and 15 W result in the same power byte of 3 
(10 W). 16 W would be 4.

   - Hessu, OH7LZB

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