A single great circle isn't a great way to model an orbit because it won't take into account the precession of the earth. It's a bit more accurate (but still no

A single great circle isn't a great way to model an orbit because it won't take into account the precession of the earth. It's a bit more accurate (but still not quite right) to say that that the constellation covers every single great circle with the same value of theta. In other words, it covers any part of the earth with equal or lower latitude. However that's a bit of a simplification that ignores things like the need for ground stations, local laws (I will be astounded if they're allowed to broadcast over China), gaps in their orbital shells (such gaps probably don't actually exist, I haven't looked carefully at their orbits), local obstructions like mountains/valleys, etc