I think the most interesting distansera would be 1,000 km, 450 km and 160 km.
Since they correspond to the maximum possible (horizontal) distance (d in image below) to the top of the noctilucent clouds,
the cumulonimbus clouds, and the “typical, run-of-the-mill, non-storm cumulus clouds, at their typical maximum heights (h in image below) respectively.
