<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><span id="yui_3_16_0_ym19_1_1490031769619_43256">I
do a lot of road trips, long ones, and my friends and family like to
follow the little red truck on findu and google maps. It would be handy if they could interrogate the radio remotely for posit and status data. Recently I have
been involved in some large public events and we used aprs to track our
vehicles as the followed a route or moved around the desert in SAR
mode. </span><span id="yui_3_16_0_ym19_1_1490031769619_43256"></span><div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1490031769619_43121" style="display: block;"><div style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1490031769619_43120"><div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1490031769619_43119"><div class="y_msg_container" id="yui_3_16_0_ym19_1_1490031769619_43127"><div id="yui_3_16_0_ym19_1_1490031769619_43258"><span id="yui_3_16_0_ym19_1_1490031769619_43259"><br id="yui_3_16_0_ym19_1_1490031769619_43260"></span></div><div id="yui_3_16_0_ym19_1_1490031769619_43261"><span id="yui_3_16_0_ym19_1_1490031769619_43262">We
found that frequent collisions on the frequency lost a lot of packets
and our maps were not updating. So I had the idea of trying to implement
a transponder mode whereby we could sequentially query each vehicle and
have the vehicle send it's position report in the reply message. <br id="yui_3_16_0_ym19_1_1490031769619_43263"></span></div><div id="yui_3_16_0_ym19_1_1490031769619_43264"><span id="yui_3_16_0_ym19_1_1490031769619_43265"><br id="yui_3_16_0_ym19_1_1490031769619_43266"></span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43267"><span id="yui_3_16_0_ym19_1_1490031769619_43268">I did find in the APRS SPEC 1.1 "Chapter 15: Station Capabilities, Queries and Responses"</span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43269"><span id="yui_3_16_0_ym19_1_1490031769619_43270">a reference to using an Igate to send a <br id="yui_3_16_0_ym19_1_1490031769619_43271"></span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43272"><span id="yui_3_16_0_ym19_1_1490031769619_43273">"APRSP" Directed Query to an individual station for its position, the station should reply with it's Station’s position.</span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43274"><span id="yui_3_16_0_ym19_1_1490031769619_43275"><br id="yui_3_16_0_ym19_1_1490031769619_43276"></span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43277"><span id="yui_3_16_0_ym19_1_1490031769619_43278">This
poses a few issues. We don't really need an Igate. The only IP network
is a LAN and a few WiFi routers. Can we "spoof" the igate in some way
so that the rf transmissions from net control to the vehicles APRS
radios look like they came from an Igate?</span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43279"><span id="yui_3_16_0_ym19_1_1490031769619_43280"><br id="yui_3_16_0_ym19_1_1490031769619_43281"></span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43282"><span id="yui_3_16_0_ym19_1_1490031769619_43283">I'm
also not sure if the trackers or radios we have will respond to the
queries. Does anyone know which trackers or radios have implemented this
protocol? <br></span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43284"><span id="yui_3_16_0_ym19_1_1490031769619_43285"><br id="yui_3_16_0_ym19_1_1490031769619_43286"></span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43287"><span id="yui_3_16_0_ym19_1_1490031769619_43288">For
experimentation I have a Kenwood D700. I can add the RC-D710 control
head to get D-710 capability (or most of it?). I also have a Kenwood
TH-D72. <br id="yui_3_16_0_ym19_1_1490031769619_43289"></span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43290"><span id="yui_3_16_0_ym19_1_1490031769619_43291"><br id="yui_3_16_0_ym19_1_1490031769619_43292"></span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43293"><span id="yui_3_16_0_ym19_1_1490031769619_43294">This might turn out to be an interesting project.</span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43295"><span id="yui_3_16_0_ym19_1_1490031769619_43296"><br id="yui_3_16_0_ym19_1_1490031769619_43297"></span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43298"><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43299"><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43584"><span id="yui_3_16_0_ym19_1_1490031769619_43300">73 de Dave, K1LPI</span></div></div></div><div id="yui_3_16_0_ym19_1_1490031769619_43193"><br></div><div id="yui_3_16_0_ym19_1_1490031769619_43191"><br></div><div id="yui_3_16_0_ym19_1_1490031769619_43189"><br></div><font id="yui_3_16_0_ym19_1_1490031769619_43123" size="2" face="Arial"><b><span style="font-weight:bold;"></span></b></font><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43157">Message: 2<br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43153">Date: Sun, 19 Mar 2017 16:40:46 +0000 (UTC)<br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43187">From: K1LPI <<a ymailto="mailto:k1lpi@yahoo.com" href="mailto:k1lpi@yahoo.com" id="yui_3_16_0_ym19_1_1490031769619_43186">k1lpi@yahoo.com</a>><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43183">To: "<a ymailto="mailto:aprssig@tapr.org" href="mailto:aprssig@tapr.org">aprssig@tapr.org</a>" <<a ymailto="mailto:aprssig@tapr.org" href="mailto:aprssig@tapr.org" id="yui_3_16_0_ym19_1_1490031769619_43182">aprssig@tapr.org</a>><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43151">Subject: [aprssig] Auto-response position reports<br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43181">Message-ID: <<a ymailto="mailto:961062914.3197887.1489941646489@mail.yahoo.com" href="mailto:961062914.3197887.1489941646489@mail.yahoo.com" id="yui_3_16_0_ym19_1_1490031769619_43180">961062914.3197887.1489941646489@mail.yahoo.com</a>><br></div><div dir="ltr">Content-Type: text/plain; charset="utf-8"<br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43149"><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43370">Is there a way to interrogate an APRS radio to send it's position in response to a message or "ping" from a another station? In effect, a "transponder" mode. I was thinking a message followed by an automatic reply message might work but I don't see how to include the surrent position in the reply message.<br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43544">Dave, K1LPI-1 Videbat esse notitia bona id temporis<br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43537"><br></div><div dir="ltr">-------------- next part --------------<br></div><div dir="ltr">An HTML attachment was scrubbed...<br></div><div dir="ltr">URL: <<a href="http://www.tapr.org/pipermail/aprssig/attachments/20170319/c28fc89a/attachment-0001.html" target="_blank">http://www.tapr.org/pipermail/aprssig/attachments/20170319/c28fc89a/attachment-0001.html</a>><br></div><div dir="ltr"><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43577">------------------------------<br></div><br><div dir="ltr" id="yui_3_16_0_ym19_1_1490031769619_43560"><br></div><div dir="ltr">End of aprssig Digest, Vol 153, Issue 12<br></div><div dir="ltr">****************************************<br></div><br><br></div> </div> </div> </div></div></body></html>