[Lowfer] MF Multipath Propagation

[Dexter McIntyre W4DEX]

Eric KD5UWL wrote:

> On Sun, 18 Jan 2004, Eric KD5UWL wrote:
>
> > Fascinating.  Dale Rice, I believe, saw this effect on my UWL HiFER signal
> > back in the late summer or so...

Yes I remember seeing that Eric.  My guess is there are two different paths the
signal takes to the receiver.  The Doppler shifted signal has to come from a
moving median.  This median would need to move at a speed of 16 km/hr at 13.555
MHz to produce a 0.2 Hz shift.  But to produce the same 0.2 Hz shift at 1705 kHz
the median movement would have to be 127 km/hr and 190 km/hr for 0.3 Hz!

Neat Doppler calculator at:

http://www.ualberta.ca/~norris/navigation/DopplerShift.html

Dex