<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Mar 14, 2016 at 5:35 PM, Robert Bruninga via aprssig <span dir="ltr"><<a href="mailto:aprssig@tapr.org" target="_blank">aprssig@tapr.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">The reason the compressed objects were depricated is because there were about ten thousand APRS radios (D700’s) out there that could not decode them. (Problem is, I lost my notes on what does and does not work… argh!)</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">But, if the idea is to have consistent performance and end-to-end communication in a tactical real-time network, it did not seem to be a good idea to have a built-in, known failure mode in a standard.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Also, the compressed format has no more precision than a regular object. Its still to the nearest 60 feet. Only the !DAO! protocol has increased precision.</span></p></div></div></blockquote><div><br></div><div>You may wish to re-examine the spec on that one. We implemented a nice little red bounding box in Xastir that bounds where the station is based on the type of sentence sent. For non-compressed it's about 40' x 60' where I live, compressed is 2' x 3'. The bounding box also indicates which directions from the plotted symbol the station may be located in.<br><br><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">If anyone has the exact list of what the D700’s or any other radio for that matter, do or do not decode, then maybe it is time to re-look at this.</span></p></div></div></blockquote><div><br></div><div>D700's/D710's are fine for those who have them. I don't believe there are any in our SAR organization so it's not a controlling factor. Even if we did, the controlling factor would be the type of rig/software installed in the command truck. We don't spend much time driving anyway: We're mostly on foot or at command.<br></div></div><br>-- <br><div class="gmail_signature">Curt, WE7U<br><a href="http://wetnet.net/~we7u" target="_blank">http://wetnet.net/~we7u</a><br><a href="http://www.sarguydigital.com" target="_blank">http://www.sarguydigital.com</a></div>
</div></div>