This map from 22-July-2003 covers from 13:50z to 17:00z. This has been the longest openning of the season so far. Almost seven hours of sporadic-E on 144 MHz provided by a huge cloud located over Poland (almost at the same place that in yesterday's opening) with the MUF staying over 200 MHz for many periods. There are no words to describe this openning so just look at this map that shows the evolution till 17:00z.. The rest of the opening (17:00z to 20:37z) is shown in another map (The 512 MB of memory of my computer were not enough to produce a single animated map with the whole opening..hi)

This animation can take some time (minutes) to load because of its size. Be patient and wait !
If you can see the map only partially press the "Refresh" button of your browser.

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.

Use the "Stop" button of your browser to stop the animation and the "Refresh" button to run it again from te begining.

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