Order Tray | Contact Us | Home | SIG Lists

[aprssig] Proportional Pathing NOW in KPC3+ trackers

Robert Bruninga bruninga at usna.edu
Thu Nov 30 01:10:17 UTC 2006


> But those BLT settings you show would send a 3-hop 
> packet every 6 minutes!

OOPS.  Yes, the BLT-4 was supposed to be every 12 minutes.

> Three-hop path routines are not desirable at all in the 
> Western USA.

That depends on what you mean by "west".  I think in the central
plains states out to the Rockies, that 3 hops is usually OK.  

> Also, you need a ToCall something like GPSMV 
> (in the LTP settings) to produce a "car" map symbol.

Ah thanks again!

> Maybe more like:
> 
> DIGI OFF
> GPSH 1 $GPGLL
> GPSH 2 $GPRMC
> GPSH 3 $GPRMC
> GPSH 4 $GPRMC
> BLT 1  EVERY 00:01:30 START 00:00:00 CLEAR
> BLT 2  EVERY 00:03:00 START 00:01:00 CLEAR
> BLT 3  EVERY 00:06:00 START 00:02:00 CLEAR
> BLT 4  EVERY 00:24:00 START 00:05:00 CLEAR
> LTP 1  GPSLK             ;pickup truck map symbol
> LTP 2  GPSLK VIA WIDE1-1
> LTP 3  GPSLK VIA WIDE1-1,WIDE2-1
> LTP 4  GPSLK VIA WIDE2-2
> 
> 
> Or, you can use the fourth GPSH/BLT/LTP/LT combination as a 
> Status text
> packet instead, like:
> 
> GPSH 4
> BLT  4 EVERY 00:59:00 START 00:05:00
> LTP  4 APRS via WIDE2-2
> LT   4 >Courteous digipath, Base:WIDE2-2
Mobile:WIDE1-1,WIDE2-1 .
> 
> <grin>
> 73, Cap KE6AFE


> > -----Original Message-----
> > From: aprssig-bounces at lists.tapr.org
> > [mailto:aprssig-bounces at lists.tapr.org]On Behalf Of Robert
Bruninga
> > Sent: Wednesday, November 29, 2006 07:00 AM
> > To: 'Wes Johnston, AI4PX'; 'TAPR APRS Mailing List'
> > Subject: [aprssig] Proportional Pathing NOW in KPC3+
trackers
> >
> >
> > > From: johnstonwes at gmail.com [mailto:johnstonwes at gmail.com]
On
> > > I once did [proportional pathing] with my... kpc3....
> > > When I was the only one on aprs in my town I had a
> > > beacon rate of 20 seconds out 0 hops, and once a minute
> > > (or three can't remember), went out 2 hops.
> >
> > Wes,
> > Wow!  I forgot that the KPC3+'s  have had proportional
pathing
> > built in all along!  I guess I have been so focused on
getting
> > it added to the new trackers coming out, that I overlooked
what
> > we could be doing with it in existing KPC-3+ trackers.
> >
> > Of course, stand-alone KPC3 trackers are kind-of unpopular
these
> > days because they are verbose with the LONG NMEA raw GPS
packet,
> > instead of the more efficient APRS or Mic-E protocol.  But
maybe
> > we need to do go after these KPC-3 NMEA trackers and instead
of
> > "looking down at them" because of their long packets, we
simply
> > encourage them to use the proportional pathing capability
that
> > they can all do easily!
> >
> > Ill add this to my FIX14439 WEB page:
> >
> > Here would be my recommended settings?
> >
> >  GPSH 1 $GPGLL
> >  GPSH 2 $GPRMC
> >  GPSH 3 $GPRMC
> >  GPSH 4 $GPRMC
> >  BLT 1  EVERY 00:03:00 START 00:00:00
> >  BLT 2  EVERY 00:03:00 START 00:01:00
> >  BLT 3  EVERY 00:06:00 START 00:02:00
> >  BLT 4  EVERY 00:06:00 START 00:05:00
> >  LTP 1  APK383
> >  LTP 2  APK383 VIA WIDE1-1
> >  LTP 3  APK383 VIA WIDE1-1,WIDE2-1
> >  LTP 4  APK383 VIA WIDE1-1,WIDE2-2
> >
> > The result is:
> > A LOCAL packet every minute (is also short, GLL data)
> > A 1 hop packet 2 of every 3 minutes
> > A 2 hop packet 1 of every 6 minutes
> > A 3 hop packet 1 of every 12 minutes.
> >
> > Bob, WB4APR
> >
> > > On 11/28/06, Robert Bruninga <bruninga at usna.edu> wrote:
> > >
> > > 	Arno,
> > >
> > > 	> Aprstracker is an open source firmware for PIC based
> > trackers
> > > 	> like the  TinyTrak, KF161-Tracker, or KF163-Tracker.
> > > 	> ...including... SmartBeaconing...
> > >
> > > 	Smart beaconing was a great improvement over fixed
> > rates.  APRS
> > > 	was never intended for fixed rates anyway, but was
> > supposed to
> > > 	use algorithms such as "decaying" to limit duplicates
> > and old
> > > 	data and provide priority to new and fresh data.  I am
> > glad you
> > > 	have this in your code.
> > >
> > > 	But there are many user settings for smart-beaconing
> > that need
> > > 	to be changed depending on the situation and this can
> > sometimes
> > > 	make things worse instead of better if these settings
> > are set
> > > 	improperly.
> > >
> > >
> > >
> >
> >
> > _______________________________________________
> > aprssig mailing list
> > aprssig at lists.tapr.org
> > https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
> >
> 
> 





More information about the aprssig mailing list