Gemini 4 Experiment Debriefing, 1967

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in fact complete absorbant below 3000 for solar radiation coming . . . does not penetrate. There is another weak band of ozone in the red, yellow, and green . . . in the . . . band uh, at, uh, distance 5000 . . . 4000 . . . 6000 . . . 7000 and if by clock uh, absorption this way then a weak ozone band or something like that. And it does subtract, it does absorb a bit of the red, yellow, green and the ozone is completely transparent and the reason 4500 down to 35 then it starts taking off again and then it becomes again the well known deep absorption uh, in the ultraviolet. Well, uh, there is only an equivalent of 2 milimeters or 3 milimeters . . . 2 or 3 milimeters equivalent of ozone in the upper atmosphere that is of course, because complete (continuation) of the sunlight. However, when you look at this edge on you're looking through quite a long path and this, perhaps, this ozone does seem to this weak absorption begins becoming equal. So it does attract out a lot of red, yellow, and green light that otherwise would exist in this rarely atmosphere, this blue atmosphere that (uses) . . . scattered light. There's certainly a lot of red, yellow, and green in the blue sky anyway. And by attracting that out you end up with another kind of blue, ozone blue, which looks probably differently from, different from the . . . blue. In fact, this is what it was. We weren't sure and then yesterday, late yesterday, uh, the astronauts showed us some of the movies they were taking, they had been taking with their gun camera and uh, on the whole in some of the very spectacular sunsets, there this band appears. There's a light of blue. Again, uh, they weren't that light that the coloring in the top of these . . . naked eye, but, uh, this is very true.

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