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<BODY lang=EN-AU link=blue bgColor=#ffffff vLink=purple>
<DIV><FONT size=2 face=Arial>Why should a time stamp make a difference
?</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>You haven't moved</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=gordon.t@internode.on.net
href="mailto:gordon.t@internode.on.net">Gordon Taylor</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=ozaprs@aprs.net.au
href="mailto:ozaprs@aprs.net.au">'Australian APRS Users'</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, March 09, 2011 8:33
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [OZAPRS] FW: Was Something is
wrong, this is a fixed location....Now,we fixed it..</DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoNormal>The issue of duplicate packets and speeds in excess of
500kmh have been fixed in my area.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Some troubleshooting by Dave VK4UN has shown that whenever
my Igate was running the duplicate packets and excessive speed changes
occur. With my Igate disconnected from the internet we confirmed all was
good as I drove from Brisbane to Buderim this afternoon.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>We employed that well known and often used Windows
troubleshooting technique of rebooting the Igate. This has fixed the
problem. Below are two packets that demonstrate the issue I
had.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>It is clear that the packet through VK4OG-1 was gated
nearly 6 minutes before the packet through VK4VP-1.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>I assume the time stamp is added when the packet is
received not when it is transmitted, which in the telemetry and SCADA world I
work in, is just not on. Our systems always time stamps event as they
occur so that any delays in the comms network do not compromise the
credibility of the data, as has happened here. I am not complaining just
highlighting that this is an issue.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><SPAN class=rawline><SPAN style="COLOR: black"
lang=EN><o:p> </o:p></SPAN></SPAN></P>
<P class=MsoNormal><SPAN class=rawline><SPAN style="COLOR: black"
lang=EN><o:p> </o:p></SPAN></SPAN></P>
<P class=MsoNormal><SPAN class=rawline><SPAN style="COLOR: black"
lang=EN>2011-03-09 03:49:40 UTC: <B><A
href="http://aprs.he.fi/?c=raw&limit=&call=VK4VP-7">VK4VP-7</A></B>>R7R4X6,<A
href="http://aprs.fi/?c=raw&limit=&call=VK4RBR-3">VK4RBR-3*</A>,WIDE2-2,qAS,<A
href="http://aprs.fi/?c=raw&limit=&call=VK4OG-1">VK4OG-1</A>:`Q]/ }WK\]"3t}=</SPAN></SPAN><SPAN
style="COLOR: black" lang=EN><BR> type:
location<BR> srccallsign:
VK4VP-7<BR> dstcallsign:
R7R4X6<BR> latitude: -27.41433333333333
°<BR> longitude: 153.0865 °<BR> course: 359
°<BR> speed: 90.74799999999999
km/h<BR> altitude: 2 m<BR> symboltable:
\<BR> symbolcode: K<BR> mbits:
101<BR> posresolution: 18.52
m<BR> posambiguity: 0<BR> comment:
]=</SPAN><o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><SPAN class=rawlineerr><SPAN lang=EN>2011-03-09 03:55:01
UTC: <B><A
href="http://aprs.he.fi/?c=raw&limit=&call=VK4VP-7">VK4VP-7</A></B>>R7R4X6,<A
href="http://aprs.fi/?c=raw&limit=&call=VK4RRC-13">VK4RRC-13*</A>,WIDE2-2,qAS,<A
href="http://aprs.fi/?c=raw&limit=&call=VK4VP-1">VK4VP-1</A>:`Q]/ }WK\]"3t}=
<B>[Duplicate position packet]</B></SPAN></SPAN><SPAN style="COLOR: black"
lang=EN><BR> type: location<BR> srccallsign:
VK4VP-7<BR> dstcallsign:
R7R4X6<BR> latitude: -27.41433333333333
°<BR> longitude: 153.0865 °<BR> course: 359
°<BR> speed: 90.74799999999999
km/h<BR> altitude: 2 m<BR> symboltable:
\<BR> symbolcode: K<BR> mbits:
101<BR> posresolution: 18.52
m<BR> posambiguity: 0<BR> comment:
]=<o:p></o:p></SPAN></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><B><SPAN
style="FONT-FAMILY: 'Trebuchet MS','sans-serif'; COLOR: #310900; FONT-SIZE: 10pt"
lang=EN-US>Regards,<BR>Gordo VK4VP</SPAN></B><SPAN
lang=EN-US><o:p></o:p></SPAN></P>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<P>
<HR>
<P></P>_______________________________________________<BR>OZAPRS mailing
list<BR>OZAPRS@aprs.net.au<BR>http://lists.aprs.net.au/mailman/listinfo/ozaprs<BR></BLOCKQUOTE></BODY></HTML>