Topband: Large TSTM areas as MF "wall"

[W8JI@contesting.com (Tom Rauch)]

> Refraction of 160M signals by cold fronts? That's the first I've heard
> of this. Where might we head to read some studies about this? Any
> experimental data available?

All of the data I have seen shows the effect rapidly dimiminishes as 
the frequency moves below upper VHF and is immeasurable at HF and 
lower.

The only noticeable effect of weather is in noise (from static 
discharges) and to a smaller extent conductivity of upper layers of 
soil (from moisture changes).73, Tom W8JI
W8JI@contesting.com