[Spooks] Pulses on 14066 and 14296 kHz

[Martin H. Potter]

Thanks, Jim.  

"Ionosonde" probably came from the French and is an abbreviation for
ionospheric sounder, used for studying the density and structure of
the ionosphere.  I sort of grew up with them and logged many of them
on shortwave during International Geophysical Year, 1957-58.  Most of
them identified back then by keying the pulse train to send a call
sign in Morse several times an hour.  (Guess that kind of dates me!)  

Nowadays, most HF sounders use FMCW (sweep) or chirp mode with no
explicit ID.  

73, 
... Martin    VE3OAT


James Weinert wrote:
> 
> Curious, what is an, "Ionosonde"? Sounds Interesting.
> 
> 73 Jim WB9NNK