[aprssig] Explain path please

Steve Noskowicz noskosteve at yahoo.com
Sun Oct 19 18:03:28 CDT 2008

--- Lynn  wrote, with Steve's interjected comments:

> Close.  As I understand it, each digi that hears AND sends should add 
> it's own ID.  

Words can get in the way sometines.  I believe Lynn is correct, but I'd pick a nit and modify it this way:

  Each digi, in sequence, that is in the path to the IGate, that hears AND sends it on to the next digi, will add it's own ID. The digi that uses up a path designator, marks it with "*".

  Shouldn't  the "WIDE1" be "WIDE1*" - indicating it was used up...or is that stripped off to shorten the packet?

>  Therefore, it is not quite accurate that -10 and -14 both 
> heard W4MIN.  

   Right.  They heard it, but the second one heard it *from* the first one as Lynn explains.  It is a sequential thing.  The other digis did not hear "him" , but heard the digipeated packet in sequence, one from another.
  Several other digis could have heard any of these packets, but they weren't in teh path to the IGate seen.

> N8JE-9 sent to APT406 (loosely speaking) 

  I wouldn't call it loose.  The packet was sent to all and any APRS station in earshot.  The AP part of APT406 means that.   The T406 is the software version in use by this station and I don't know which and am too lazy to look it up in the TOCALL document. 

73, Steve, K9DCI

with a path of
> WIDE1-1,WIDE2-2
> W4MIN heard the signal, consumed the WIDE1-1 and repeated
> (probably with 
> WIDE1*,WIDE2-2)
> WC4PEM-10 heard that, consumed one of the WIDE2's and
> repeated (probably 
> with WIDE1,WIDE2-1)
> WC4PEM-14 heard that, consumed the final WIDE2 and repeated
> (probably 
> with WIDE1,WIDE2*)
> KC4ZVV-2 heard that and gated it to APRS-IS
> I'm doing a bunch of APRS-IS data collection (along
> with over-the-air 
> collection via KJ4ERJ) and crunching on some 2 meter
> propagation 
> numbers.  When conditions are good, I directly hear most of
> the 
> WC4PEM-nn family.  Right now (since 8:00pm or so tonight),
> reception is 
> again on the downhill slope and I'm only hearing their
> digi's from 
> WX4MLB-3 (that digi has a taller tower than I do).
> If anyone knows for sure, feel free to throw your hat in
> the ring on 
> interpreting this particular packet path.
> Lynn (D) - KJ4ERJ
> Stan Leeds wrote:
> > I saw this today on findu
> >
> >
> N8JE-9>APT406,W4MIN,WIDE1,WC4PEM-10,WC4PEM-14,WIDE2*,qAR,KC4ZVV-2:!2716.84N\08150.06Wk028/010/A=000101/Scanning
> > Local Repeaters
> >
> > So does it say that W4MIN heard him first and
> digi'd, then WC4PEM-10 and 
> > -14 both heard him and digi'd and then more than
> likely KC4VV-2 heard 
> > and gated him?
> >
> > Thanks in advance and 73,
> > Stan/KC7EHJ
> >
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