#hf

I had a feeling I knew what this was but I just confirmed it. Military Electronic Counter-Counter Measure (ECCM) Frequency Hopping Spread Spectrum. I don't know if anyone has noticed lately but the lower HF bands are filled up with this crap right now. Even some appear to cross an entire band and overlap everything else. I'm picking this up in North America.

#shortwave #sigint #hf #signalidentification