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[aprssig] An Empiracal Analysis: 6 meter APRS or meteorscater?

Robert Bruninga bruninga at usna.edu
Mon Jan 28 19:23:37 UTC 2008


> I would think a slower but improved C/N protocol, 
> e.g. WSJT, should cut the power requirements and 
> get through the local noise...thoughts?

But needs an SSB transceiver ($1000) instead of the cheap if not
free low-band VHR radios that are hitting the streets...

No question that there are better ways to do it.  Problem is, in
ham radio, unless it is free or cheap, there is never much of a
following to make new great things work on a large scale.  But
if WSJT can show improvement with FM radios, then it is worth
looking into I guess.

Bob, WB4APR



> ----- Original Message -----
> From: "Ev Tupis" <w2ev at yahoo.com>
> To: "TAPR APRS Mailing List" <aprssig at lists.tapr.org>
> Sent: Thursday, January 24, 2008 8:18 AM
> Subject: [aprssig] An Empiracal Analysis: 6 meter APRS or 
> meteorscater?
> 
> 
> > Ok, now we're cookin' with gas.  Here's what 'ya got to work
with...
> >
> > Bob, I've taken the information that you found on the web 
> about several
> (commercial?) meteor-scatter stations that seem to operate 
> successfully and
> re-presented the data in chart format for easier comparison.
> >
> >
> > Freq  Pwr    Antenna Data  Msg.  RX    DX to  Success  Rate
> >              Gain    Rate  Size  Stns  RX stn Min/hr Max/hr
> > (MHz) (W)    (dBd)  (kbd)  (b)   (#)   (mi)   (full
deliveries)
> > ----- ----   -----   ----  ----  ---  -----   ----    ----
> >
> > 38     200   10+10      2   150    1    600     18      46
> > 38     400   10+10      2    50    1    500     15      60
> > 38     400   10+10           50    1   1000      8      30
> > 38     600    2+10      2   130    4    600    360    1200
> > 38    2000    6+12          130       4-900     75     240
> > 46     750    0+11      2                       12      30
(June)
> >
> > The questions are many, but this can serve as a first step 
> to know what
> has been successful in the past so as to know what to 
> engineer for future
> duplication in the Amateur service.
> >
> > I have what I hope to be constructive input...but will 
> share a bit later
> in the day.
> >
> > Kind regards,
> > Ev, W2EV
> >
> >
> >
> >
> >
> >
> >
> >
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