[aprssig] Data in APRS-IS

[rttyman]

Hello APRS-gurus!

I'm new to the group, but have follow problem:


We need to filter APRS-IS traffic for Russian/Ukrainian and other CIS HAMs,
but found that quite much of traffic originated by "pirates" callsigns,
look here:

UN5YSQ-3>APS228,qAR,W5GWH-1:@301318z3339.81N/09532.43W-APRS+SA Billy in Paris, TX
RM-1>APU25N,WIDE1-1,WIDE2-1,qAR,W5GWH-1:;147.000-R*220057z3222.44N/09515.54Wr[147.000]- 88.5 PL Tyler
RM-1>ARC Repeater
RS5LM-15>APN383,W5NCD-15,WW5RM-1*,qAR,W5GWH-1:!3126.51N/09742.29W#APRS by www.tarc.org/A=001060
UWW5ND-5>S0PT4U,W5BII,AC5U*,qAR,W5GWH-1:'yQ%l"m-/]"3w}Orange ARC- OrangeTX
RU2>APRS,TCPIP*,qAU,T2ITALYS:=3921.43N/00916.30EmRU2 430.050 shift + 1600 (Monte Serpeddi -CA) (Link RU2>regionale Sardegna) - Alt.1067m
RV5>APRS,TCPIP*,qAU,T2ITALYS:=4044.20N/00840.90EmRV5 145.725 shift -600KHz -Subtono 179.90Hz (Monte Rasu -SS) -Alt.1304m
EX-1>APN383,W5BEC-5*,WIDE2-1,qAR,W5GWH-1:!!00000027----000027AF0361--------0018053D00000000
RM-1>APU25N,WIDE1-1,WIDE2-1,qAR,W5GWH-1:>301023z[146.640]- 444.725+ Both 136.5 Tone Longview Area.
RNKNPW>APRS,qAS,WXSVR::NWS_ADVIS:031600z,WIND,VAZ43>47-58-59 {37vHB
REVNPW>APRS,qAS,WXSVR::NWS_ADVIS:031200z,WIND,CAZ73 {35rCB
ROSLDG>BEACON,OR2-1,qAR,W7GC-3:>Oregon Coast Repeater Group: WX: Rose Lodge, OR: www.ocrg.org:W7GC-5
UNION>APN391,qAR,KB7KFC-1:!3424.86NS11224.25W#PHG7830/SAR DIGI  JEEP POSSEPRESCOTT  KB6TWC    7900FT
UCAPK>APNK01,96UHF2-2,qAR,AC7YY-15:!4658.38NU12308.30W#PHG5830/K7CPR UCAPK UHF 9600B APRS 
RIWWSW>APRS,qAS,WXSVR::SKYRIW   :WINTER STORM WARNING IN EFFECT FROM 6 AM {37xAC
RLXNPW>APRS,qAS,WXSVR::NWS_ADVIS:031545z,WIND,WVZ46-47 {37hAB
RAHSWO>APRS,qAS,WXSVR:;RAH_OUTLK*040900z3542.60N\07918.00WyCheck For Activation {38uAA
EURKA>APNU19,CAVE,HOLDEN,WIDE2*,qAR,KA7EZO:!3926.98NS11559.07W#PHG9800/W4,NVn, Info:  w7xz at arrl.net  A=009578
RAVEN>APN382,WIDE2-2,qAo,KM5VY:!3459.19NS10620.70W#PHG5630/W4,NMn/K5CQH-15 Digi www.urfmsi.org 
LYTTLE>BEACON,BAKER*,WIDE2-1,qAR,VE7NEK:        VOICE 146.25/85 INVERMERE - VA7CAO
RVRHTS>APN382,qAR,N7UWX:!4143.33NS11149.31W#PHG7140/W2, UTn, RIVER HEIGHTS DIGI N7UWX
RANCHO>APN391,ECHO,WA6AFT-3*,WIDE2,qAR,W6YX-5:!3843.52N112038.40W#PHG2560/NCAn,TEMPn/AG6AU/Rancho del Sol,Camino,CA/A=003400
REX>APN382,qAS,KB7KSU:!4348.06NN11146.44W#PHG5360W3,ID3-3 KB7ITU-NWS REXBURG DIGI
USEA>TWSRRQ,VBALDI,WIDE2*,144350,qAR,TACOMA:'22]l 
#/]
...e.t.c


Most of this traffic come from USA, but some EU and Asia too. This failure
users set in packet source call chars R*, U*, EX*, EW*, and other that is true
russian/ukrainian/other-exUSSR hamradio prefixes.

So we can't filter just our activity by prefix-filter and this
'failure' packets digipeated by our DIGI's and create much useless
traffic on RF too!


What you think about why this guys use strange source call's in
their APRS packets?


73, Sergej
uz2hz/ut1hzm
(one of the first APRS'ers in exUSSR)