Iridium constellation orbits at 780km, while Starlink is slightly lower at 550km. Don't know how much, if any, difference that makes in the signal strength requ

Iridium constellation orbits at 780km, while Starlink is slightly lower at 550km. Don't know how much, if any, difference that makes in the signal strength requirements. As I understand it, Iridium was designed with the tradeoff of accepting weaker signals with lower throughput, while Starlink wants high throughput and needs a stronger signal.