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[aprssig] Balloon DFing on APRS (test lines)

Steve Noskowicz noskosteve at yahoo.com
Sat Mar 3 00:24:43 UTC 2012


I can't comment on the specifics because I haven't examined it, but doesn't Google hunt by WB6EYV, Bob Simmons' do all this?

 pelican2 at silcom.com 
 http://groups.yahoo.com/group/PicoDopp/ 

-- 
73, Steve, K9DCI


> My KML server application,
> aprskml.dev.java.net, will do this for you if you 
> provide the appropriate filter.  It will listen to the
> aprs-is, and provide a 
> KML stream that you can point google earth at.
> 
> Gregg Wonderly
> 
> On 3/2/2012 4:19 PM, Andrew Rich wrote:
> > I could see google earth being used with an icon and a
> line drawn into direction of the target
> >
> > Sent from my iPhone
> > Andrew Rich
> >
> > On 03/03/2012, at 5:14, "Bob Bruninga"<bruninga at usna.edu> wrote:
> >
> >> Subject: Re: [aprssig] Balloon DFing on APRS (test
> lines)
> >>
> >>> I ONLY look for BRG/NRQ after a CSE/SPD Data
> Extension.
> >> Yes.  This was for mobile DFing, so assume it
> is always there.  But do not
> >> require there to be anything specific in that
> /000/000 field.  APRSdos puts
> >> in OBJECT in that location if it is an
> object.  So look for NRQ in its fixed
> >> location whether or not it has valid CSE/SPD data
> or not.
> >>
> >>> Q is a quality which governs the degree width
> of the wedge...
> >> Actually, The "quality" was simply intended to be
> on a subjective 1-to-9
> >> scale.  There is no way to define it much more
> precise than that.  The only
> >> reason we need an actual value is if you want to
> display a wedge.  But
> >> wedges are not at all well defined either.  RF
> does not have edges.  SO we
> >> usually define an antenna pattern by its 3 dB line,
> but this does not mean
> >> there are no signals beyond it.
> >>
> >> OK, lets go with 9 is one degree and back off from
> that as y ou suggest.
> >> But we must make it very clear to users that this
> stuff is all subjective...
> >>
> >> People have a better chance at remembering 1, 2, 4,
> 8, 16, 32, 64...
> >>
> >> But again, they really have no such data in most
> cases.  What they have is a
> >> gut feel as to how well their bearing line
> is.  On a scale of 1 to 9.  You
> >> can use your power=s of two to define the width of
> the wedges (that is what
> >> it was intended for) but we need to not let then
> people start taking these
> >> overlapping wedges and then trying to make
> *computational* assessments.
> >> Garbage in  garbage oiut.
> >>
> >> The value of the wedges is again, to display the
> sender's opinion as to his
> >> quality.
> >>
> >> Anyway, Glad to hear of your implementation!
> >>
> >> Bob, Wb4APR
> >>
> >>
> >>
> >> _______________________________________________
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> >> aprssig at tapr.org
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> >
> 
> 
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