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<div class="moz-cite-prefix">As I understand the history, there are
some radios that won't even display the 67 characters. There
are/were TNC limits on how long UI packets could be overall. Some
TNCs can do longer, and the APRS-IS carries a much longer limit.
But the specification tells you what should work. Exceeding those
limits may result in unexpected behavior, but as you've observed,
there are lots of packets out there that seem quite long.<br>
<br>
BTW, after the colon is the payload. That particular packet has a
timestamp, position information, weather, and a final comment.<br>
<br>
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and
Win32<br>
<br>
On 11/10/2012 11:21 AM, Bryan Hoyer wrote:<br>
</div>
<blockquote
cite="mid:788DAF93-1681-44C9-900C-BF9A343E338C@gmail.com"
type="cite">APRS1.01 states 67 characters for a message and up to
43 for a comment, yet I see packets twice that long on APRS.FI.
This ones 109 after the :
<div><br>
</div>
<div><b style="font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 12px; white-space: nowrap; background-color:
rgb(255, 255, 255); "><a moz-do-not-send="true"
href="http://aprs.fi/?c=raw&limit=&call=KA8OAD-1"
style="color: rgb(0, 0, 255); cursor: pointer;
outline-style: none; text-decoration: none; ">KA8OAD-1</a></b><span
style="font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 12px; white-space: nowrap; background-color:
rgb(255, 255, 255); ">>APU25N,</span><a
moz-do-not-send="true"
href="http://aprs.fi/?c=raw&limit=&call=K8YSE-1"
style="color: rgb(0, 0, 255); cursor: pointer; outline-style:
none; text-decoration: none; font-family: Verdana, Arial,
Helvetica, sans-serif; font-size: 12px; white-space: nowrap;
background-color: rgb(255, 255, 255); ">K8YSE-1</a><span
style="font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 12px; white-space: nowrap; background-color:
rgb(255, 255, 255); ">,WIDE1,</span><a moz-do-not-send="true"
href="http://aprs.fi/?c=raw&limit=&call=K8UI-1"
style="color: rgb(0, 0, 255); cursor: pointer; outline-style:
none; text-decoration: none; font-family: Verdana, Arial,
Helvetica, sans-serif; font-size: 12px; white-space: nowrap;
background-color: rgb(255, 255, 255); ">K8UI-1</a><span
style="font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 12px; white-space: nowrap; background-color:
rgb(255, 255, 255); ">,WIDE2*,qAR,</span><a
moz-do-not-send="true"
href="http://aprs.fi/?c=raw&limit=&call=K8LI-1"
style="color: rgb(0, 0, 255); cursor: pointer; outline-style:
none; text-decoration: none; font-family: Verdana, Arial,
Helvetica, sans-serif; font-size: 12px; white-space: nowrap;
background-color: rgb(255, 255, 255); ">K8LI-1</a><span
style="font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 12px; white-space: nowrap; background-color:
rgb(255, 255, 255); ">:@101613z4108.09N/08136.25W_190/004g005t057r000p020P020b10220h51FWX_<a class="moz-txt-link-freetext" href="http://">http://</a><a
moz-do-not-send="true" href="http://pages.sssnet.com/kend">pages.sssnet.com/kend</a> Fairlawn,OH</span><br>
<div><br>
</div>
<div>AX.25 says 256 bytes for the UI payload</div>
<div><br>
</div>
<div>A Tweet is 140 characters</div>
<div><br>
</div>
<div>An SMS is 160 characters</div>
<div><br>
</div>
<div>Is it just the display limit of some radios?</div>
<div><br>
</div>
<div>Just exploring the capabilities and limitations of APRS</div>
<div><br>
</div>
<div>Thanks!</div>
<div>Bryan Hoyer - K7UDR</div>
<div><br>
</div>
</div>
<br>
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</pre>
</blockquote>
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