[aprssig] What is APRS, really? USA Coverage?

[Fred Hillhouse]

This display shows the aircraft AIS beacons at different flight levels that I have received. It continually updates as time passes. It would be interesting to see a similar display of APRS stations received directly. I imagine a multiline packet could show the general area of receive ability.

 

Best regards,

Fred N7FMH

 

 

 



 

 

From: aprssig [mailto:aprssig-bounces at lists.tapr.org] On Behalf Of Lynn W Deffenbaugh (Mr)
Sent: Friday, October 23, 2020 2:03 PM
To: Robert Bruninga; R Kirk
Cc: aprssig at lists.tapr.org
Subject: Re: [aprssig] What is APRS, really? USA Coverage?

 

Already done.   Just run APRSIS32 and set the following:

 

View / None - Get rid of everything

View / Transport / Digipeater - Shows all stations that have digipeated

Screen / PHG Range Circles / Full or Half

 

And if you want to see them darker, just crank up the opacity number in Screen / PHG Range Circles / Opacity

 

Of course, this relies on all the digipeaters actually including valid PHG information.

 

For instance, here's central Florida with 1/2 sized circles (good coverage for mobiles).  And you can see why tracking from Melbourne (WX4MLB-3, just north of ME) to Orlando (west of K4EOC) takes you through an APRS RF dead zone.  As is most of the I-95 corridor up through Daytona Beach.  K4EOC is actually a digi, but doesn't beacon PHG information.



 


Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32 

 

On 10/23/2020 1:04 PM, Robert Bruninga wrote:

Apples and oranges sorta.  The APRS (thin line) map is just a plot of actual position reports actually on the highways, not of "coverage",.  Just widening each dot by 30 miles would still not be a "coverage" map? 

 

We need the overlapping plot of the PHG circles of all digipeaters.

 

I bet Lynn could do that. 

 

Bob  

   [Go to Google Images and try "cell phone coverage maps" to get an idea of just how much cell coverage has blossomed,... Then contrast that with the thinner APRS coverage map at Bob's aprs.org site. That map was 2008 and I can't help but think it's even skimpier now that APRS has shrunk.]

 

This is not to say APRS is not underutilized along with most other forms of amateur radio, but I'd rather leave the discussion of the reasons that is to others. The concept of APRS is a very, very powerful system. As Bob has been saying for how many years, it just needs to be thought of as something more than just location tracking.

 

   [Really, it is just location tracking despite the many other uses that Bob has thought of that aren't really used. Think Voice Alert, roadside traffic counting etc ...]

 

I loved it but its time has passed. Look at the traffic volume trend on this group, for instance.

 

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