Re: [amsat-bb] off toppic -- multipath doppler??

["kc6uqh" <kc6uqh@xxxxxxx>]

I think we called that airplane flutter.
Art,
 KC6UQH
----- Original Message ----- 
From: "KT2Q" <dxdx@optonline.net>
To: <AMSAT-BB@amsat.org>
Sent: Wednesday, November 16, 2005 7:53 PM
Subject: [amsat-bb] off toppic -- multipath doppler??


> All:
>
> Sorry about the off topic question...
>
> While working a local station on two meter CW (about 12 miles away), we 
> noticed what seemes like multi-path with momentary "blips" of doppler 
> shift (about 100hz). This happens both ways.
>
> To the best of my knowledge, doppler is not associated with multi-path 
> unless the reflecting objects are in motion. The only things I can think 
> of is meteor or airplane scatter.
>
> Having worked meteor scatter on 2 meters before, the signal strength and 
> number of random meteors needed to match this situation seems unlikely.
>
> Airplane scatter seems possible, but it happens so often duing a QSO, 
> there would have to be a lot of them overhead, all the time :  ).
>
> So, is it possible for multi-path signals on 2 meters to show doppler 
> without being caused by something in motion? I have a recording of the 
> signal if anyone would like to hear it.
>
> Thanks,
>
> 73, Tony KT2Q
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