[aprssig] Beacon parsing help
Jim (List)
jim.list at stuckinthemud.org
Fri Mar 22 17:13:21 EDT 2019
Looking for help from someone experienced in parsing ARPS beacons to assist
in understanding differences in the position beacons I'm seeing from various
stations.
I'm dusting off some code I wrote a few years ago to parse APRS beacons,
which at the time was decoding everything perfectly and was used on various
activities.
However, monitoring positional data today it's picking up beacons with
differences that do not appear in the specification.
Are these differences recent changes to the APRS spec, or are they clients
that are just sending bad data?
Monitored beacons are listed below, with a note of what I'm seeing wrong.
K3NAL-1>BEACON,qAR,KK4ZWW-1:!146.64-000000z3812.05n/07623.07WrT146 R25 NetTu
1930 Mtg 4th Th
*** Appears to have a frequency, a dash and a time inserted before the Lat,
plus the Lat letter is in lower case
W9GO-3>BEACON,qAR,KC9MWQ-1:!146.91-4028.82N/08609.33W# Kokomo Repeater Club
*** Another with what looks like a frequency and a dash before the Lat
SV1GCB-3>APMI06,SV3ISZ-11*,SOUTH2-1,qAR,SV3IRM-10:!222024S3704.18N/02225.79E
#QTH T=18.5C, U=13.2V, WX3in1Plus2.0
*** Has "222024S" inserted before Lat
WB5OER-2>APTT4,WX5II-3,WIDE1*,WIDE2-1,qAO,KG5YOV:!2847.0333N/09729.2666W#PHG
71304/ 13.0V
*** Too many digits after the decimal in both Lat and Long
W3EPE-3>APTT4,WIDE1-1,WIDE2-1,qAO,BEARCK:!4048.31N07531.34W#PHG51304/ W1
*** No symbol table ID
POINT6>APN382,qAR,N6MLD-1:!4702.46NS11359.W#PHG5860/ 11,22,21,33 harc's pt6
thanks mso wx.
*** No digits after the Long decimal
OE3FRE-15>APNL51,TCPIP*,qAI,OE3FRE-15,SQ6KXY-2,T2DENMARK,T2HUB5,T2CAEAST:!48
04.66NN/01618.46EE`Radiosondetracker
*** Lat N/S and Long E/W duplicated
DC1SK-15>APNL51,TCPIP*,qAI,DC1SK-15,SQ6KXY-1,T2BIO,T2HUB5,T2CAEAST:!5112.018
N/01117.042E`Radiosonde Tracker - Based on kxyTrack 1.0-1805
*** Too many digits after the decimal in both Lat and Long
DO2ATR-10>APGW1K,TCPIP*,qAC,T2KA:!5005.05N/007 0.07E#DO2ATR iGate APRS
432.500 JO30MU
*** Spaces in the Long that don't conform to position ambiguity
Jim, G1HUL
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