That makes sense except for the irregular height. If they were all the same, or even if they were roughly parabolic themselves it would make more sense. Perhap

That makes sense except for the irregular height. If they were all the same, or even if they were roughly parabolic themselves it would make more sense. Perhaps it's an optical illusion. This photo seems more regular and confirms the tie-down aspect (I'm sure it's how the curvature is maintained). https://forum.nasaspaceflight.com/index.php?action=dlattach;topic=43786.0;attach=1448995;image https://forum.nasaspaceflight.com/index.php?action=dlattach;...