This map from 9-July-2003 covers from 15:05z to 17:42z. This was a replay of yesterday's opening but this time the cloud over central France was more consistent and more QSO were achieved. Several contacts were made from EA8 over 3000 Km with a combination of the sporadic-E plus the good tropo conditions from EA8 to Spanish mainland at that time.
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It shows the evolution, size and MUF of the sporadic-E cloud that caused the opening on 144 MHz. and it is an estimation based on the information I have picked up here and there of QSOs and reports of European stations. I don't claim it to be accurate but just an estimation that could help understand what happened that day.
Also please notice that sometimes you will see MUF rise very quickly. This is because of the almost complete lack of data for frequencies between 51 and 144 MHz. and that leads to shown MUF rising almost 90 MHz in one minute. You should understand that this is not the usual behaviour of MUF, but the result of the lack of data mentioned above.
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