[aprssig] Duplicates evident on aprs.fi

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Sun Jun 26 20:47:00 EDT 2011

APRSISCE/32 doesn't remove trailing spaces.  It's more likely the TNC 
that is stripping them before delivering them to the client.

What IGate is it and what other IGates are in the area?  And do you know 
what TNCs are in use at the one that preserves and the one that strips 
the spaces?

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
(and jealous protector of non-modifying packets!)

On 6/26/2011 6:07 PM, Rob wrote:
> On 26/06/11 19:25, Heikki Hannikainen wrote:
>> I looked up the packets on aprs.fi. The packets have been modified by 
>> a digipeater or an igate, either by adding or by removing a space 
>> character in the end of the packet. Since the packet contents differ, 
>> they're not treated as duplicates by the APRS-IS, and they're not 
>> filtered.
> Yes, that seems to be the answer. The packets in question all have 
> trailing spaces until they pass through one igate where the spaces 
> disappear. I believe the spaces are part of the OT reporting temp and 
> voltage in the comment so removing it would require turning off the 
> reporting or adding something extra to the comment. As far as I can 
> tell, the igate in question is using APRSISCE win32 (APWW08)

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