When I launched a radiosonde at 0830 UTC (1730 SMT), August 20, I could confirm a balloon was traveling in the rainbow sky.

We have spent here on-station over two weeks and could obtain various observation data. The sky was decorated with this beautiful rainbow, as if they had celebrated us. I had better say rain-ball rather than rainbow to indicate this nice combination.

by BG (edited at J-Office for English ver.)