If we are able to get satellites into a low-level orbit, with the technology to connect those on the ground - surely a bigger risk is space debris and the possibility of colliding with other objects in space? From what I understand most, if not all space agencies do spend a fair bit of resources tracking and projecting the trajectories of all objects in space - and constantly altering the paths of those under their control to avoid such items? ... not saying it isn't impossible - but surely that's another challenge to take into account?