[aprssig] 434 MHz tracking
Stephen H. Smith
wa8lmf2 at aol.com
Sun Aug 5 23:54:22 CDT 2007
Andrew Rich wrote:
> Um the glider was at 8000 feet and i was on the ground.
> Mind you when I drove it, i got 1.9 km's out of it.
> -----Original Message-----
> *From:* Stephen H. Smith [mailto:wa8lmf2_ at _aol.com]
> *Sent:* Monday, 6 August 2007 11:09 AM
> *To:* vk4tec_ at _people.net.au; TAPR APRS Mailing List
> *Cc:* ozaprs
> *Subject:* Re: [aprssig] 434 MHz tracking
> But how fast were you moving? In what kind of terrain. Over
> what distance?
> 1200 baud is much more tolerant of mobile flutter, fading and
> multipath from moving vehicles than higher data rates, because
> it's individual symbols are much longer. The differences
> between even 1200 and 9600 on a Kenwood D700 in motion are quite
No wonder it worked! That's "cheating" - a pure line-of-sight
minimum-loss reflection-free path. Try it from a terrestrial mobile to
a base station, especially in a mountainous area or a built-up urban
area with lots of reflections from buildings, bridges, etc.
Stephen H. Smith wa8lmf (at) aol.com
EchoLink Node: 14400 [Think bottom of the 2M band]
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