[Lowfer] [Fwd: Dale Rice's UWL reception (was)[OK, how about this]

[Dexter McIntyre W4DEX]

Trying to get this thru qth.net's spam filter......Dex

Dexter McIntyre W4DEX wrote:
> 
> riese-k3djc@juno.com wrote:
> >
> > Wouldnt that be most likely caused by multi path
> 
> I thought multipath didn't change the frequency of a signal.  The phase
> would be changed due to the difference in path distance.  This would add
> or subtract from the received signal strength but not change the
> frequency.
> 
> > hmmm there are the odd effects of Long Delayed Echoes
> > which havent been reported and an area worth looking into
> 
> I've never experienced an LDE but many years ago while I was working
> VK4JP on 10 meters there was an echo on the path that sounded like close
> to half a second. (An SDE?) I've heard DX stations via short and long
> paths simultaneously and back scatter signals but VK4JP's signal was
> unlike any other I've heard.  We tried to come up with an explanation
> but the best we could do was to say the signal was making several paths
> around the earth.  Even so the frequency was the same on both signals.
> 
> >
> > Those that have access to UHF or Microwave beacons watch those
> > to see the effects of airplane and other reflection sources
> 
> I've spent many hours watching aircraft doppler shifts on UHF and
> microwave signals displayed on Spectran.  Recently I noticed something
> peculiar on the WA1ZMS 903.055 MHz beacon.  It turned out to be a
> reflection from a nearby Nexrad radar's dish while it rotated.  A screen
> shot can be seen here:
> 
> http://w4dex.com/temp/zms2.jpg
> 
> So back to the question of what is responsible for the hifer dual
> frequency pattern like Dale's UWL reception:
> 
> http://www.orecal.com/argo/split00000.jpg
> 
> Multipath from a moving ionspheriac reflection perhaps?
> 
> W4DEX