[aprssig] Another Clueless Balloonist On The Rampage With A TinyTrack...

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Mon Mar 17 12:43:35 EDT 2014

Yes, he was lighting up quite a large geographical area:

First KF6RFX-2:

Then KF6RFX-3:

Red lines are the first or direct hop.  Green lines are digipeated 
copies of the packets.   Rest assured that there are LOTS of green lines 
completely covered by the red lines.  And yes, the red direct links are 
really that long for a transmitter at altitude.  The direct RF footprint 
is big anywhere over 1,000 feet AGL.  That's why no path i necessary 
when flying at altitude.

All of the plots are available at:


The high resolution *-RF-7.png images show the balloon's actual path 
inside the red blob and lets you see more of the completely redundant 
green digipeater links at the fringe.  The larger red dots are IGates 
and the smaller red dots are digipeaters.

The following link is a dump of the raw packets received by all 
APRSISCE/32 IGates that mention KF6RFX.  This includes the BALLOON 
ANSRVR group launch detection and various DX reports from APRSISCE/32 
IGates.  The packets received per IGate can be found in the Packets 
directory of the original link.


At its peak altitude (apparently 104,038 feet), I counted 41 copies of 
the packet received by APRSISCE/32 IGates across a span of 10 seconds 
(remember, digipeated copies take time to propagate, especially on a 
busy frequency).

Lynn (D) - KJ4ERJ - APRS Infrastructure Visualization

PS.  Note that these plots were generated from raw RF traffic as 
received directly from APRSISCE/32 IGates.  You won't see this sort of 
coverage information from the APRS-IS as it will show only the first 
copy of any packet received.  The RF traffic represents ALL original and 
digipeated packets received by any APRSISCE/32 IGate with no duplicate 

For comparison, here's the much less dense APRS-IS dupe-suppressed 
pictures of the two balloons. mostly IGates as the directly received 
packets are typically delivered to the APRS-IS much quicker than the 
digipeated copies which end up dupe-suppressed out of existence.

On 3/16/2014 11:04 AM, Stephen H. Smith wrote:
> I awoke this morning to hear the WIDE1-1 digipeater in my APRS 
> igate/webserver setup keying up every 10-15 seconds constantly.
> There are TWO balloons running a WIDE1-1,WIDE2-1 path every 10 seconds 
> at 30,000', about 20 miles west of Detroit.
> o   They are hitting:
> o   CHLSEA (VERY wide area digi about 10 mi west of Ann Arbor, MI) on 
> the first hop, and my digi on the second.
> o   And my station directly, with the local Lansing area wide as the 
> second hop.
> o   And the local Lansing-area wide on the first hop.
> o   And at least two other digis directly and/or via second hops, 
> within 40 miles that I can hear off the air from here.
> The result is almost 100% occupancy of 144.39 non-stop, as monitored 
> off-the-air, in the Lansing/East Lansing area.    (And I assume most 
> of the rest of Michigan, northern Ohio, northern Indiana and southwest 
> Ontario.)
> A clear demonstration, if there ever was one, of why one should NEVER 
> NEVER NEVER use WIDE1-1 in the path of an airborne trackcer
> This log is monitored off the air with my TH-D7 listening to my 
> digipeater/igate in Haslett, MI (about 5 mi north-east of East 
> Lansing, MI)
> 2014-03-16 14:44:51 START UTC
> 2014-03-16 14:45:01 KF6RFX-2>APT312,WA8LMF-10*,WIDE2-1 <UI>:
> /144455h4200.38N/08411.05WO000/000/A=037966/UMich Testing
> 2014-03-16 14:45:12 KF6RFX-2>APT312,WA8LMF-10*,WIDE2-1 <UI>:
> /144509h4200.46N/08410.61WO000/000/A=038134/UMich Testing
> 2014-03-16 14:45:24 KF6RFX-3>TRPP5Q,WA8LMF-10*,WIDE2-1 <UI R>:
> `p&?#\gO/>#Y"}=
> 2014-03-16 14:45:30 KF6RFX-2>APT312,WA8LMF-10*,WIDE2-1 <UI>:
> /144524h4200.54N/08410.18WO000/000/A=038294/UMich Testing
> 2014-03-16 14:45:42 KF6RFX-2>APT312,WA8LMF-10*,WIDE2-1 <UI>:
> /144539h4200.61N/08409.72WO000/000/A=038488/UMich Testing
> 2014-03-16 14:46:01 KF6RFX-2>APT312,WA8LMF-10*,WIDE2-1 <UI>:
> /144555h4200.68N/08409.26WO000/000/A=038672/UMich Testing
> _______________________________________________________________
> -- 
> Stephen H. Smith    wa8lmf (at) aol.com
> Skype:        WA8LMF
> EchoLink:   14400  [Think bottom of the 2-meter band]
> Home Page:          http://wa8lmf.net
>  Long-Range APRS on 30 Meters HF
>     http://wa8lmf.net/aprs/HF_APRS_Notes.htm
> High Performance Sound Systems for Soundcard Apps
>    http://wa8lmf.net/ham/imic.htm
>    http://wa8lmf.net/ham/uca202.htm
> "APRS 101"  Explanation of APRS Path Selection & Digipeating
>   http://wa8lmf.net/DigiPaths
> _______________________________________________
> aprssig mailing list
> aprssig at tapr.org
> http://www.tapr.org/mailman/listinfo/aprssig

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