Preliminary Gemini 4 Crew Debriefing, Part II, 1965

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208
McDivitt
White
GQ ► •fiJDEN l -JA k~
down.
lt' s much, much higher than the air
glow that you see at night .
If you're looking over at the daylight side, it
looks l i ke the light tl..:ie, goes up probably
three times as high as the air glow does.
What
do you think about that?
Let me go into my impressions of the air glow in
the evening.
I saw the same thing you did, of
course, and it looked like to me that the dark
part was roughly t wo or three times as thick
as the lighter air glow layer below it. We
were both impressed with the phenomenon of the
apparent rise in the air glow as you go from the
daylight to the dark, and as soon as you get out
in full daylight, the earth's layer is all gone.
But as you transition between the daylight and
the dark, you see the layer start out and narrow
down to what you see as you get into the dark
side as the air glow layer.
And when you
initially get into the dark area, the air glow
seems to disappear for a moment, and then the air
glow layer pops out when you get into full dark, ,
very clearly.