It looks like, as the crow flies distance between Chicago and Frankfurt, would take a pulse around 23ms to arrive, at the speed of light. It looks like for a LEO satellite, the round trip time, is around 40ms.
They mention it uses the ionosphere, so curious exactly how long it takes the short-wave pulse to arrive.
They mention it uses the ionosphere, so curious exactly how long it takes the short-wave pulse to arrive.