If they can achieve this level of fine detail, I would err on the side of assuming any mirror they chose to fashion would be anything but crude. I wonder what

If they can achieve this level of fine detail, I would err on the side of assuming any mirror they chose to fashion would be anything but crude. I wonder what Eric Schmidt's robotic submarine project is upto - it would be wonderful to see lidar / ground radar along all sea-shelves/continental-shelves... to see submerged coastal cities.