I was looking at the GRLevel3 map to see what is going on with hurricane Michael this morning.
Conspicuous on the map was a a pennant with four long barbs and a short one for CWOP station
FW2930. Although the wind barb is showing NNE, floating over the station shows "Unknown at 255 mph".
I checked CWOP and looked at the raw packets.
FW2930>APRS,TCPXX*,qAX,CWOP-4:@090802z3025.67N/08635.49W_072/022t077h96b1005421BTSTWx Upload 2.3.0
FW2930>APRS,TCPXX*,qAX,CWOP-2:@091332z3025.67N/08635.49W_053/023t077h96b1005210BTSTWx Upload 2.3.0
FW2930>APRS,TCPXX*,qAX,CWOP-7:@091902z3025.67N/08635.49W_073/022t077h96b1005150BTSTWx Upload 2.3.0
FW2930>APRS,TCPXX*,qAX,CWOP-2:@092432z3025.67N/08635.49W_076/020t076h95b1004943BTSTWx Upload 2.3.0
FW2930>APRS,TCPXX*,qAX,CWOP-3:@093002z3025.67N/08635.49W_076/020t076h95b1004983BTSTWx Upload 2.3.0
FW2930>APRS,TCPXX*,qAX,CWOP-7:@125332z3025.67N/08635.49W_32767/255t3277h255b1000359BTSTWx Upload 2.3.0
FW2930>APRS,TCPXX*,qAX,CWOP-7:@125902z3025.67N/08635.49W_32767/255t3277h255b1000299BTSTWx Upload 2.3.0
FW2930>APRS,TCPXX*,qAX,CWOP-2:@130432z3025.67N/08635.49W_32767/255t3277h255b1000029BTSTWx Upload 2.3.0
FW2930>APRS,TCPXX*,qAX,CWOP-6:@131002z3025.67N/08635.49W_32767/255t3277h255b999959BTSTWx Upload 2.3.0
FW2930>APRS,TCPXX*,qAX,CWOP-2:@131532z3025.67N/08635.49W_32767/255t3277h255b999889BTSTWx Upload 2.3.0
The raw weather data for this station (1
st)does not seem to have the problem, but the APRS packets (2
nd) do. The raw packet parsing info that I found online seems to not reflect everything in these strings.
Apparently CWOP raw data is a little different and does not suffer from this issue present in the raw APRS data.
Ironically, I have seen the "255 mph" problem on DW5664 which is a Davis station that NWS Gaylord has installed. (not happening currently)
Anyone have any ideas or explanation for this? The "255 mph" sticks out like the proverbial sore thumb on the GRLevel3 map.
Interestingly, looking at this station on
aprs.fi looks normal with no sign of the "255"...
Greg H.