I use photos as a reference. So the reflections you see in the balloons is mostly at the area where the wall is in the background. When I take the pictures, it's a reflection of me there ...
How do you get images downlinked from 30 km up? Hams might guess SSTV — slow scan TV — and that’s the approach [desafloinventor] took. If you haven’t seen it before (no pun ...