[OZAPRS] "To" field

[Norm McMillan]

Returning to APRS after a small hiatus. I'm running the local iGate
VK3WRM-5. xastir on an r-pi, Tiny2, FM828. All pretty bog stansard I would
guess!
Mobile is an old Garmin GPS12 and D-700.

Watching a number (quite a number!) of packets as I set up and fine tune
things, something caught my eye. The first fiel in the string following the
"from" callsign seems to change. I always thought this was generated by the
TNC/Tracker .
2018-10-10 13:45:40 AEDT: *VK3XCI-7
<https://aprs.fi/?c=raw&limit=&call=VK3XCI-7>*>*DEB1W0*,WIDE1-1,WIDE2-2,qAR,
VK3WRM-5 <http://aprs.fi/?c=raw&limit=&call=VK3WRM-5>
:'F`cl#XK\]"4Y}Let the Good times Roll
2018-10-10 13:48:29 AEDT: *VK3XCI-7
<https://aprs.fi/?c=raw&limit=&call=VK3XCI-7>*>*DEB1W0*,WIDE1-1,WIDE2-2,qAR,
VK3WRM-5 <http://aprs.fi/?c=raw&limit=&call=VK3WRM-5>
:'F`bl#XK\]Let the Good times Roll
2018-10-10 13:48:49 AEDT: *VK3XCI-7
<https://aprs.fi/?c=raw&limit=&call=VK3XCI-7>*>*DEB1W0*,WIDE1-1,WIDE2-2,qAR,
VK3WRM-5 <http://aprs.fi/?c=raw&limit=&call=VK3WRM-5>:'F`bl#XK\]"4Q}
2018-10-10 13:49:51 AEDT: *VK3XCI-7
<https://aprs.fi/?c=raw&limit=&call=VK3XCI-7>*>*DEB1V9*,WIDE1-1,WIDE2-2,qAR,
VK3WRM-5 <http://aprs.fi/?c=raw&limit=&call=VK3WRM-5>:'F`_ls<0x1d>K\]"4M}
2018-10-10 13:50:52 AEDT: *VK3XCI-7
<https://aprs.fi/?c=raw&limit=&call=VK3XCI-7>*>*DEB1V0*,WIDE1-1,WIDE2-2,qAR,
VK3WRM-5 <http://aprs.fi/?c=raw&limit=&call=VK3WRM-5>:'F`Tl#*K\]"4B}
2018-10-10 13:51:53 AEDT: *VK3XCI-7
<https://aprs.fi/?c=raw&limit=&call=VK3XCI-7>*>*DEB1S0*,WIDE1-1,WIDE2-2,qAR,
VK3WRM-5 <http://aprs.fi/?c=raw&limit=&call=VK3WRM-5>:'F`wm*IK\]"4E}
2018-10-10 13:52:55 AEDT: *VK3XCI-7
<https://aprs.fi/?c=raw&limit=&call=VK3XCI-7>*>*DEB1P6*,WIDE1-1,WIDE2-2,qAR,
VK3WRM-5 <http://aprs.fi/?c=raw&limit=&call=VK3WRM-5>:'Fa0n>IK\]"4J}
2018-10-10 13:53:56 AEDT: *VK3XCI-7
<https://aprs.fi/?c=raw&limit=&call=VK3XCI-7>*>*DEB0X1*,WIDE1-1,WIDE2-2,qAR,
VK3WRM-5 <http://aprs.fi/?c=raw&limit=&call=VK3WRM-5>:'FaNn*KK\]"4N}
2018-10-10 13:55:01 AEDT: *VK3XCI-7
<https://aprs.fi/?c=raw&limit=&call=VK3XCI-7>*>*DEB0Y6*,VK2RBX-1
<http://aprs.fi/?c=raw&limit=&call=VK2RBX-1>,WIDE1*,WIDE2-2,qAR,VK3WRM-5
<http://aprs.fi/?c=raw&limit=&call=VK3WRM-5>:'Famn!=K\]"4Z}
etc
On the other hand, VK3WRM is constant at APX204
Where does this field originate,  how is it generated and is there usefull
data encoded?

norm vk3xci
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