Re: 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,

[Miguel Pelicano]

Foi um dia que fica na história! Foi também incrível o facto de uma estação
de EA7 ter sido escutada no Brasil  !!!

73, Miguel
CT1BYM

A segunda, 1/06/2020, 13:50, João Costa > CT1FBF <ct1fbf  gmail.com>
escreveu:

> 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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> da  ARLA - Associação de Radioamadores do Litoral Alentejano
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