Not so much a pattern, but a type of signal not found in nature; narrowband CW. :)
IIRC, you recently explained the reasoning behind this. Isn't it both because narrowband CW is not found from known natural sources, and because it is found from known intelligent sources (human-made radio stations)?
IIRC, you recently explained the reasoning behind this. Isn't it both because narrowband CW is not found from known natural sources, and because it is found from known intelligent sources (human-made radio stations)?