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Re: Not transmitting while moving

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  • francois.rogez
    Thanks for the links; this probably answers my question, although I might still do my own survey for fun.
    Message 1 of 24 , Dec 14, 2011
      Thanks for the links; this probably answers my question, although I might still do my own survey for fun.

      --- In tracker2@yahoogroups.com, Marcel S <ki6qdj@...> wrote:
      >
      > You may find the digi coverage maps on aprs.fi quite useful to debug good
      > coverage zones as well. Note that these maps a based on the number of
      > packets received in an area and not necessarily the quality of signals from
      > there. See example at: http://aprs.fi/heard/a/N6EX-1
      >
      > (You'll want to use SPLAT! for actual propagation mapping. Or visit the
      > KE5QHX site: http://k5ehx.net/repeaters/qrepeater.php)
      >
      > Cheers,
      >
      > -Marcel AI6MS
      >
      > On Wed, Dec 14, 2011 at 10:14 AM, francois.rogez <ffdef@...> wrote:
      >
      > > **
      > >
      > >
      > > Thanks Scott, I will look into that for a future antenna
      > >
      > > Here is an update, and maybe an end to this topic:
      > >
      > > After spending more time looking at the aprs.fi data and map, I believe
      > > that the current performance of my setup (GPS, T2-301, antenna) is quite
      > > good: I can hit repeaters several tens of miles away when the topography is
      > > favorable (and, I guess, when those repeaters are not already busy dealing
      > > with some other packets that I can't hear).
      > >
      > > It looks like my mistake was to think that the area where I live ought to
      > > have good coverage from the nearby high-altitude digi's. In fact, there is
      > > clearly a shadowed area at the base of the mountain where the coverage
      > > varies within short distances.
      > > This statement is based on 2 things:
      > > - looking at those packets that made it to aprs.fi and what stations
      > > heard me directly
      > > - driving around with a laptop announcing the callsign of the digi's being
      > > heard directly
      > >
      > > I would like to refine this into more systematic coverage maps:
      > > 1 - a map showing where I send a packet from, and whether I hear it echoed
      > > back
      > > 2 - a map showing the locations where I received any packets from each digi
      > >
      > > For (1) I would need a way to detect when the t2-301 decided to send a
      > > packet
      > > For (1) and (2) I would need a way to get a GPS position, and a way to log
      > > all the time (a laptop is not a good long-term solution). Probably
      > > something with a micro-controller and flash memory card.
      > >
      > > I will start a new topic when/if I seriously get started with this idea.
      > >
      > > Thanks to all that helped rule out issue with the radio/TNC/GPS.
      >
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