Hello Tom,
The skeds were at random times, during the week in the evenings,
on weekends often over the day, always same symptoms.
I am pretty shure that this will be not possible on HF, but was often found
on 10m backscatter signals.
> Why didn't the local broadcast stations, with megawatts of ERP,
> keep the path open?
The broadcaststations in germany are running not to much power
on the FM band. Most with 10KW ERP, just a few with 100KW.
We think on our path, both sites use the same troposheric aeria for reflection
and keep that spot better ionized.
As there is a major industrial aeria ( Ruhrgebiet ) between us we feel
that probably the layer of small dust particels covering the aeria most of
the time is responible for that phenomena.
73 Peter
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