[CTSARA] Frequency Shifting During a DX QSO?

[Andrew Siegel]

I don't know for sure, but I'd guess that if the ionosphere was 
*actively* expanding and contracting somewhere between the two of you 
during the QSO, you would experience Doppler shift, despite the fact 
that you were both standing still.  Given that your propagation path was 
extremely long, there'd be plenty of ionosphere for your signals to 
traverse.

Jon Perelstein wrote:
> I was listening to a VK7 in Tasmania this morning (PSK-31 on 20 meters) and
> his frequency kept shifting by about +/- 50Hz.  None of the other signals
> on the band at that time were shifting in frequency.  All of the others
> were shorter range (e.g., Western Europe, Florida).
> 
> When I QSO'd with him, he said that he noticed the shifting on my signal,
> but had not experienced any frequency shifting on the other QSOs he had
> participated in before talking with me.  He checked his waterfall and did
> not see any frequency shifting on any other signals on the waterfall.  All
> of his QSOs before me were shorter range for him (e.g., China and
> Singapore).
> 
> Given where his beam was pointing, It's possible we were bouncing over the
> North Pole.
> 
> Are there atmospheric conditions on long DX (especially over one of the
> poles) that would cause the received frequency to bounce around a bit?
> 
> 73s
> Jon
> WB2RYV