I seem to remember that ill-thoughtout "experiments" like this have been
mooted before. Did not the Americans want a one stage to improve the
ionosphere by tipping a lorry load of thin wire dipoles into orbit, the
Russians wanted to paint the Artic ice black to make Arctic Russia more
habitable. Someone wanted to inject sodium ions into the ionsphere to
"improve" it. Fortunately most of these hare-brained schemes have been
squelched at an early stage.

"HF?? Nobody uses HF for communication these days....do they ??"

Cheers de Alan G3NYK