[aprssig] Interesting APRS RF Behavior at Dayton....

Fredric Moses fred at moses.bz
Fri May 16 23:05:36 CDT 2014


And that’s why we put a device there…  We have for the past 4 hamventions put different style devices in and recorded traffic to compare after the fact loading and just how well “x” did…   The “digi” is a direct only with a viscous delay so that it would only digi a station it heard direct only if it wasn’t already digied by an outside station…   

The -14 also logs all traffic to a log file no matter if it digied or made it to aprs-is..  As that’s one of it’s missions is to just see how well it RXed in the hostile environment of hamvention.  And from inside the arena itself.   Myself and Mr.Love manage a very large APRS network in michigan we put up temporary dig’s for events and experiment with different setups/devices…  Just look at our garages and the amount of APRS gear we have… Second thought don’t.. our wives might start to wonder…

I tried to open your events map but was getting a server not found… How are you getting your “RF” activity from around the arena.. where is your receiver located?  Or are you just filtering apris-is feed?

--
Fredric Moses - W8FSM - WQOG498
fred at moses.bz




On May 16, 2014, at 9:01 PM, Gregg Wonderly <gregg at wonderly.org> wrote:

> I’d guess that most likely the front ends are overloaded with RF in general.  Overall, that’s a horrible place to try and receive something.
> 
> Gregg
> W5GGW
> 
> On May 16, 2014, at 5:00 PM, Stephen H. Smith <wa8lmf2 at aol.com> wrote:
> 
>> I currently have my special events UI-Webserver (normally used for balloon launches) displaying all the RF activity within 6 miles of the Dayton Hamvention.    See it at:
>> 
>>    <http://wa8lmf.net/map>    Click on the "Special Events" server link.
>> 
>> Note that I am filtering for a radius of 6 miles around the venue, while the range scale of the map display is only 1 mile; i.e. the immediate vicinity of the event.   Click the list of "All Stations Heard" below the map to see stations at numerous motels in the area as well as actually at the Hara Arena. Sixty-plus stations are currently being heard within 6 miles of Hara.....
>> 
>> =========================================================
>> 
>> Looking locally at the details in the "Stations Heard" list, I am noticing a somewhat odd behavior.    There are two stations on-site at the Hara Arena (venue of the Hamvention)serving as igates:   W8FSM-11 and ON6WFO-10 .  W8FSM is also acting as a digipeater (god only knows why in this temporary patch of TOTAL RF SATURATION).
>> 
>> However the vast majority of stations in the area are being igated by either W8GUC (about 5.5 mi / 8.8 km north-east)  or W8VFR-1(about 20 mi / 32 km southwest) of the arena.    Are the on-site igates so totally overloaded by the 2-meter RF onslaught that they aren't hearing anything?
>> 
>> 
>> 
>> ______________________________________________________________
>> 
>> 
>> --
>> 
>> Stephen H. Smith    wa8lmf (at) aol.com
>> Skype:        WA8LMF
>> EchoLink:  Node #  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
>> 
>> 
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