[aprssig] "station which heard ... directly on the radio"

Erv Heimbuck erv at heimbuck.com
Sun May 19 14:41:11 CDT 2013


I believe this is due to the fact that some digipeaters do not amend their
own call to the packet so that when it is received by you it appears to have
come direct because there are no amended digipeater call letters.  
This maybe an over simplication but I think is the essence to the problem

Erv  K0OTZ


-----Original Message-----
From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
Of Kristoff Bonne
Sent: Sunday, May 19, 2013 11:27
To: aprssig at tapr.org
Subject: [aprssig] "station which heard ... directly on the radio"

Hi All,


yesterday and today, I have been experimenting with the project to use a 
20 dollar RTL DAB/DVB-T dongle as SDR radio for a RX-only igate.

Now, looking at my page on aprs.fi (http://aprs.fi/info/ON1ARF-2) I see 
this:
Stations heard directly by ON1ARF-2 –
(...)
and then some stations, like this one:
ON4NS-9 1 2013-05-19 12:08:31 2013-05-19 12:08:31 JO11NB > JO11LF 	19.6

km 148° 	2013-05-19 12:08:31

I did find this pretty odd so I looked in the "raw messages" for this 
station:
2013-05-19 12:08:32 CEST: 
ON4NS-9>UQPTY6,ON7EQ,ON0OST,qAR,ON1ARF-2:`y_.oR9>/`"4F}_"

This does not look to be a "heard directly". It has been digipeated 
twice before reaching my node.


So am I missing something here? Or is this a bug?


73
kristoff - ON1ARF

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