see follow up posts and links in this thread
https://www.hfunderground.com/board/ind ... 774.0.html
"A friend who worked at haarp and is still up there at the university did plasma research that shows the ionosphere doesn't refract or reflect radio signals, it re-radiates them on an electron level. His research was front page on qst back in the day."
Propagation questions, answers and general information
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