The existing WiFi frequencies go right through the atmosphere. How do I know? I have used them, as a ham radio operator, to communicate with satellites.
All the ground-side devices need to transmit to the sat-side. This takes lots of power, especially if the ground antenna is not directed - an omni antenna. But, this could work when lithium ion batteries are replaced by fission or fusion batteries...
I made that point too, at 2400 Mc, I think it is doable. Heck, we hams have a band next to it at around 2300 Mc and that is a sat band too.