There's somewhere around 15 thousand relevant planes in the air at any time. If you sent two updates a minute over Iridium, using their 25 byte message plan, y

There's somewhere around 15 thousand relevant planes in the air at any time. If you sent two updates a minute over Iridium, using their 25 byte message plan, you'd be looking at a megabyte per minute for the entire planet. That's such a tiny fraction of what that single constellation can do.