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[aprssig] Q: What's the Omni DF Formula

Steve Noskowicz noskosteve at yahoo.com
Thu Jul 23 07:03:57 UTC 2009




Reading the spec, I see the PHG circle formula, but not the Omni DF circle formula.  Can anyone provide it?
I made an Excel spreadsheet with a nifty bubble chart and somewhat of a size approximation, but would like to use the formula that is (hopfully) determined by more than my (highly, of course) educated guesses.

-- 73, Steve, K9DCI

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--- On Sun, 7/19/09, Heikki Hannikainen <hessu at hes.iki.fi> wrote:

> From: Heikki Hannikainen <hessu at hes.iki.fi>
> Subject: Re: [aprssig] Q: NOGATE Method(s)
> To: "TAPR APRS Mailing List" <aprssig at tapr.org>
> Date: Sunday, July 19, 2009, 10:37 AM
> On Sat, 18 Jul 2009, Steve Noskowicz
> wrote:
> 
> > Steve Dimse <steve at dimse.com>
> wrote:
> >> !x! was implemented as a shorthand for the
> internet standard...
> >> 
> >> ...I implemented it in findU...as a way to allow
> hams to
> >> opt out of having their positions stored on findU,
> ...
> >> Years ago we settled on NOGATE and RFONLY...
> > 
> > I was hopin' cuz' on the D700 & D7 changing
> between two different status texts is easier than the
> path.  No biggie.  Easier to remember anyway.
> 
> I hadn't seen this in any of the specifications, so it's
> not implemented in aprs.fi yet. It seems useful, so I'll put
> it in the code now. Is it documented somewhere else than the
> mailing list archives?
> 
> The feature doesn't seem to be really used, I only have a
> single station in my database using it, and it has last
> transmitted in May 2009. I'll delete that track now. :)
> 
> Steve Noskowicz should make a note that Steve Dimse said:
> 
>   "I added !x! in order to allow mic-e users to add it
> to their comment text... "
> 
> That's *comment* string, not the *status* message. They're
> two different things. The comment is transmitted together
> with position packets, and our server-side software can
> conveniently drop the position packet if !x! is seen in the
> beginning of the comment text. The separate status packet
> might be only transmitted much later, or it might be lost.
> 
>   - Hessu, OH7LZB
> 
> 
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