[CQ-Contest] Fwd: 20m Intruder

Courtney Judd k4wi at k4wi.net
Sat Feb 2 16:57:12 EST 2019

yesterday morning it was strong S-9 plus toward 40 deg from west central 
Alabama. I could copy it from 13998.3 to 1403.6 and then it dis-appeared 
and hasn't been back since. Hard to tell! 73's Cort K4WI

> *From:* Ben Antanaitis - WB2RHM <wb2rhm at wb2rhm.com>
> *Date:* Saturday, February 02, 2019 10:36 AM
> *To:* cq-contest at contesting.com
> *Subject:* [CQ-Contest] 20m Intruder
> All,
> I sent a question about the 'bogey' signal over to some of the 
> 'numbers stations', SDR signal analysis, Mil-Comms monitoring type of 
> groups, yesterday.
> I got a reply from one of the groups. That group looked at the signal, 
> and recorded it for 'examination, identification, & decoding' 
> attempts.   The result that came back from   them said that this 
> signal appeared to be 'a known Canadian Navy signal type and was in 
> STANAG 4285 and appears like Thales 3000 modems'  No way to tell if 
> this was a stationary transmitter or a 'mobile' (water or air).
> https://www.rtl-sdr.com/stanag-4285-decoding-with-rtl-sdr/
> If mobile, that might be why it might have been in different seeming 
> locations.  Speculation was also it might have been on a patrol 
> routing between NA and Greenland air space.
> 73,  Ben - wb2rhm
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