I've recently been asked (by a flat earther no less) how Exalt have managed to achieve a world record data/communications microwave link if the earth is indeed spherical (which it obviously is).
I pointed out that radio waves can travel via line of sight (his argument) or groundwave, skywave or troposcatter.
He then pointed out that the troposcatter (at least in the article/visualisation that I'd directed him to) ends at around the 3GHz area. The exalt communication is at 7GHz.
I've had a quick look into how this was achieved, but so far not managed to find much other than the chances are that the broadcast/receiver towers were more than likely at a decent altitude, thus negating a large part of the earths curvature. Also, as expected the various press releases are very vague when it comes to sharing details as to how this was achieved. I appreciate this might be worth asking on an electronics/atronomy stackexchange but thought I'd begin here first.
Any help would be much appreciated, always looking to learn new things myself.