If you've not already done so, download and install Google Earth. If
you've not heard of it, Google for it! ;-)
Then when that is working (and after you've found you house, and had a
good look at your neighbors garden etc) go to...
And click the "Radio availability" link, select "Open" when you get the
choice, sit back and wonder!..
It's a 4D (3D + Time) visualisation of the current state of the earth's
ionosphere!.... Very nice...
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