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[aprssig] Curious about bogus packets on Findu

Robert Bruninga bruninga at usna.edu
Thu Sep 30 22:16:14 UTC 2010


In these examples you cut off the data, so we cannot see what
kind of packet it is...
A Mic-E posit begins with either ` or '.  A message begins with
:...

?
Bob

> --- On Thu, 9/30/10, Robert Bruninga  wrote:
> 
> > APK101 is the TOCALL version number for the radio.
> > You wont see it except when the radio is sending a message.
> > Otherwise, for positions, it is the latitude encoded.
> > Bob
> 
> 
> Thanks bob, but I have studied Mic-E a little bit - the 
> latitude (TOCALL)field only.
> 
> I'm pretty sure I didn't send any messages this trip and the 
> bogus TOCALL packets I see on Findu are "beacon-like" in the 
> rest of the packet.
> 
>  ARRRRRG!  Points to the radio hickupping.
> 
> I see what must be the two last bogus ones, around one bogus
TOCALL:
> 2010 09 29
23:57:41,K9DCI-9>TQ3V9T,WIDE1-1,WIDE2-1,qAR,W9EAA:...
> 2010 09 29
23:58:46,K9DCI-9>APK101,WIDE1-1,WIDE2-1,qAR,W9EAA:...
> 2010 09 29
23:59:49,K9DCI-9>TS2V3R,WIDE1-1,WIDE2-1,qAR,W9EAA:...
> 2010 09 30
00:00:57,K9DCI-9>TQ3V2Q,WIDE1-1,WIDE2-1,qAR,W9EAA:...
> 
> These jump north about two degrees latitude and back.
> 
> Here's another:
> 2010 09 30
00:12:42,K9DCI-9>TQ3U8S,WIDE1-1,WIDE2-1,qAR,W9EAA:...
> 2010 09
30:00:14:48,K9DCI-9>APK101,WIDE1-1,WIDE2-1,qAR,W9EAA:...
> 2010 09
30:00:15:50,K9DCI-9>TQ3U6W,WIDE1-1,WIDE2-1,qAR,W9EAA:...
> 2010 09
30:00:16:53,K9DCI-9>TP3U2Q,WIDE1-1,WIDE2-1,qAR,W9EAA:...
> 
> This jumps about a degree south.  Looks like around the time 
> crossing ole' Mississippi.  Ahhh, so the D700 is gray-line 
> sensitive.  (:-)
> 
> Either W9EAA is munging packets or the D700 is.  Since I 
> didn't send messages, W9EAA wouldn't even know I was a D700 
> (unless it's munging somebody elses packets with mine.
>   Except I see that another two bogus TOCALLS are gated by 
> WA9LT, but without an adjacent hyper-jump.
> 
> 
> Thinking back...
> On my previous trip to Denver area, I had a very tenacious 
> "OPENING TNC" lockup...on every power up I had to clear it 
> with some GPS command wrangling I found on the Yahoo group.   
> I finally tried a reset of the TNC and it went away.
> 
> Perhaps it's time for a reset-&-reload-fest.  Hmmm...I never 
> had to replace the battery either...
> 
> Steve, K9DCI
> 
> 
> 
> 
> 




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