Re: Not transmitting while moving
- Thanks for the links; this probably answers my question, although I might still do my own survey for fun.
--- In email@example.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)
> -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.