Strawja,
Welcome to the list.
Here is a link to the Radarsat page, which has an explanation.
http://www.holloworbs.com/Radarsat.htm
The video clips are attached. Notice the point from which the auroras are emanating., i.e., from an orifice in the middle of Antarctica.
I'll send you some other pages this afternoon or tonight, I am pressed for time.
Dean
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