Hi all,
Andy G4JNT wrote:
Read the article on Dopplergrams by G3PLX in RadCom three or four years
ago
...
There is likely to be several Hz of Doppler shift on that frequency at
night
time.
Guess who forgot that simple fact last night !
From monitoring of overseas beacons and LF standard frequency and time
signals, with significant skywave component in the DX paths (signal strength
is much higher at night time), I have not seen evidence of frequency shift
from the assumed stable frequency of the transmitter. If there is Doppler
shift, it would seem to have limits of no more than 0.1 Hz for carriers
around 200 kHz, and is probably proportionally less for lower frequencies.
73, Bob ZL2CA
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