I'm getting back into APRS after a few years (oh, about 15, I think). I'm in the process of writing a ground-up Java parser, as my eventual goal is to run a native application on the Android G1 that uses it as a position reporting device.<br>
<br>I've run across a few packets that I can't determine the contents of based on the 1.0.1 and 1.1 specifications. For example, the packet below:<br><br><div style="margin-left: 40px;">CCDES-1>APRSWX,WIDE1-1,WIDE2-2,qAR,W3AHL-4:@200150z3957.34N/07535.07W_108/000g000t029r000p000P000h48b10170L000gt41.93vw0.243bv12.78fr000.C100<br>
<br></div>We have a 'g000' that says what the gust is. Then we have a 'gt41...' I have no idea what that is. There's also the question of when to stop parsing, and treat the remainder as a comment. In the 1.0.1 PDF file, a number of the example weather packets are shown with 'wRSW'. 'w' should be the software version, but it's not define in the list that follows. Is there a known sigil for deciding the remainder of the packet are comments?<br>
<br>I also see a number of improperly formatted packets hitting aprs-is. Like this one:<br><br><div style="margin-left: 40px;">"WN0X-2>AP1WWX,KA0GFC-5,WIDE1,KB0WZI-3*,WIDE2-1,qAR,AC0JK-5:@200812z3837.76N/09220.63W_014/00<br>
</div><br>Note the incomplete speed field. What's the appropriate course of action? Discard it?<br><br>Then there are these packets:<br><br><div style="margin-left: 40px;">N1HQ>APS227,TCPIP*,qAC,THIRD:N/<br>N1HQ>APS227,TCPIP*,qAC,THIRD:08<br>
N1HQ>APS227,TCPIP*,qAC,THIRD:54<br>N1HQ>APS227,TCPIP*,qAC,THIRD:0.<br></div><br>I'm guessing these might be a QSO or something, but I don't understand how to programmatically identify them. <br><br>Can someone point me to some documentation i might be overlooking? Or provide some insight from experience?<br>
<br>Thanks,<br>--jc (K4JCW)<br>