ARLA/CLUSTER: Um novo Caso de Estudo envolve a abertura incrível em 144 MHz entre as ilhas de Cabo Verde e a Polónia no modo FT8 na passada Sexta-feira a "só" 5.600 km de distancia,

[João Costa > CT1FBF]

Amazing opening on 144 MHz from Cape Verde Islands to Poland

On Friday the 29th of May 2020, there was an extensive Sporadic-E opening
across Europe which reached as high as 144 MHz allowing stations across the
continent to make many fine contacts.

The most extraordinary contacts however were probably from the Cape Verde
Islands off the coast of Africa to Poland on 144 MHz. The longest path
recorded with the FT8 digital mode seems to have been from D4VHF to SP5MXU
in Warsaw, a distance of just over 5,600kms.

To put that into context, the same distance from Cape Verde Islands to the
north would reach as far as Oslo, the capital of Norway or far to the north
of the whole island of Iceland. The equivalent distance to the west would
reach as far as the US capital Washington DC.

The most likely mode of propagation was via a maritime tropo duct from Cape
Verde Islands to the coast of Spain and Portugal and from there via
Sporadic-E to Poland.

More details here...
https://ei7gl.blogspot.com/2020/05/amazing-opening-on-144-mhz-from-cape.html
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