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<div dir="ltr" data-setdir="false"><div><div dir="ltr">FYI, here's my view from an unfiltered APRS-IS feed,
showing North-Central and North-East United States filtered to only show
stations identified as digipeaters by their symbol code. The green
filled-in circles with crosshairs around some of the stations are their
range circles based on PHG or RNG parameters. Ignore the smaller
filled-in circles in other colors, indicating the station states you
specified for APRS-DOS, or the solid rings just barely larger than the
icons indicating the Mic-E status of those stations. Note that most
digipeaters in the mid-West don't specify an RNG value (or it's
extremely small). Also note the number of digipeaters with red question
marks; those are "stealth" digis who don't send beacons, and only do
their legal identification by doing TRACE digipeating, whose position I
estimate using your vicinity plotting in reverse.</div><div dir="ltr"><br></div><div dir="ltr" data-setdir="false"><a href="https://www.ka2ddo.org/ka2ddo/US-nc-ne-digipeaters-2020Oct23.png">https://www.ka2ddo.org/ka2ddo/US-nc-ne-digipeaters-2020Oct23.png</a><br></div><div dir="ltr"><br clear="none"></div>Andrew, KA2DDO</div><div><br></div></div><div><br></div>
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On Friday, October 23, 2020, 5:34:38 PM EDT, spam8mybrain via aprssig <aprssig@lists.tapr.org> wrote:
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<div><div id="ydpc6109bf3yiv9987135087"><div>No, because if they did, I could compute a range instead of using the very small default range you specified when you revised the equation for estimating range from PHG.
<div><br></div><div>Andrew, KA2DDO</div><div></div>
<br><br><div style="font-size:100%;text-align:left;color:#000000;">-------- Original message --------<br>From: Robert Bruninga <bruninga@usna.edu> <br>Date: 10/23/20 17:02 (GMT-05:00) <br>To: spam8mybrain <spam8mybrain@yahoo.com> <br>Cc: R Kirk <isobar@verizon.net>, aprssig@lists.tapr.org <br>Subject: Re: [aprssig] What is APRS, really? USA Coverage? <br><br></div><div dir="ltr"><div dir="ltr">But they at least have PHG data?<div>Bob</div></div><br><div class="ydpc6109bf3yiv9987135087gmail_quote"><div dir="ltr" class="ydpc6109bf3yiv9987135087gmail_attr">On Fri, Oct 23, 2020 at 3:27 PM spam8mybrain <<a href="mailto:spam8mybrain@yahoo.com" rel="nofollow" target="_blank">spam8mybrain@yahoo.com</a>> wrote:<br></div><blockquote class="ydpc6109bf3yiv9987135087gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div>Looking around a feed of all digis from APRS-IS, it is sad how few digipeaters report their expected range.
<div><br></div><div>Andrew, KA2DDO</div><br><br>-------- Original message --------<br>From: spam8mybrain via aprssig <<a href="mailto:aprssig@lists.tapr.org" rel="nofollow" target="_blank">aprssig@lists.tapr.org</a>> <br>Date: 10/23/20 15:09 (GMT-05:00) <br>To: Robert Bruninga <<a href="mailto:bruninga@usna.edu" rel="nofollow" target="_blank">bruninga@usna.edu</a>>, R Kirk <<a href="mailto:isobar@verizon.net" rel="nofollow" target="_blank">isobar@verizon.net</a>> <br>Cc: <a href="mailto:aprssig@lists.tapr.org" rel="nofollow" target="_blank">aprssig@lists.tapr.org</a> <br>Subject: Re: [aprssig] What is APRS, really? USA Coverage? <br><br>YAAC can do it too (View->Layers...->Show Range Circles), although I'm improving it to display more obviously.
<div><br></div><div>Andrew, KA2DDO</div><div>author of YAAC</div><br><br>-------- Original message --------<br>From: Robert Bruninga <<a href="mailto:bruninga@usna.edu" rel="nofollow" target="_blank">bruninga@usna.edu</a>> <br>Date: 10/23/20 13:04 (GMT-05:00) <br>To: R Kirk <<a href="mailto:isobar@verizon.net" rel="nofollow" target="_blank">isobar@verizon.net</a>> <br>Cc: <a href="mailto:aprssig@lists.tapr.org" rel="nofollow" target="_blank">aprssig@lists.tapr.org</a> <br>Subject: Re: [aprssig] What is APRS, really? USA Coverage? <br><br><div dir="ltr"><div class="ydpc6109bf3yiv9987135087gmail_quote"><blockquote class="ydpc6109bf3yiv9987135087gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div style="color: black; font-style: normal; font-weight: normal; font-stretch: normal; font-size: 10pt; line-height: normal; font-family: arial; font-size-adjust: none;"><div><div id="ydpc6109bf3yiv9987135087gmail-m_4817809636701155129gmail-m_14099840380629497yiv4671580702"><div><div style="color:black;font-family:arial, helvetica;font-size:10pt;">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? </div></div></div></div></div></blockquote><div> </div><blockquote class="ydpc6109bf3yiv9987135087gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div style="color: black; font-style: normal; font-weight: normal; font-stretch: normal; font-size: 10pt; line-height: normal; font-family: arial; font-size-adjust: none;"><div><div id="ydpc6109bf3yiv9987135087gmail-m_4817809636701155129gmail-m_14099840380629497yiv4671580702"><div><div style="color:black;font-family:arial, helvetica;font-size:10pt;"> We need the overlapping plot of the PHG circles of all digipeaters.</div></div></div></div></div></blockquote><div><br></div><div>I bet Lynn could do that. </div><div><br></div><div>Bob </div><blockquote class="ydpc6109bf3yiv9987135087gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div style="color: black; font-style: normal; font-weight: normal; font-stretch: normal; font-size: 10pt; line-height: normal; font-family: arial; font-size-adjust: none;"><div><div id="ydpc6109bf3yiv9987135087gmail-m_4817809636701155129gmail-m_14099840380629497yiv4671580702"><div><div style="color:black;font-family:arial, helvetica;font-size:10pt;"></div>
<div dir="ltr" style="color:black;font-family:arial, helvetica;font-size:10pt;"> <span style="font-style:italic;font-weight:bold;"> [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 <a href="http://aprs.org" rel="nofollow" target="_blank">aprs.org</a> site. That map was 2008 and I can't help but think it's even skimpier now that APRS has shrunk.]</span><br>
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<div>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.</div>
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<div> <span style="font-style:italic;font-weight:bold;"> [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 ...]</span></div>
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<span style="color:black;font-family:arial, helvetica;font-size:10pt;font-style:italic;font-weight:bold;">I loved it but its time has passed. Look at the traffic volume trend on this group, for instance.</span><br clear="none">
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