Preliminary Gemini 4 Crew Debriefing, Part I, 1965

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233
White
McDivitt
White
McDivitt
as a sequence of pictures every five minutes.
The sequence is three pictures every five minutes,
for as many passes as you can get .
So you have to
start this thing at sunup, or as soon as the hor­
izon becomes light.
We took our first three pic­
tures .
We went on through and we were supposed
to start our Horizon $canner Check--.
Jim, the time we started you ' ve logged in here as
11:04.
Okay, at 11 :04 we started our MSC- 10 Experiment .
We were given instructions to start the Horizon
Scanner Sunset Check at 11:54. It just so turned
out that we were going along and we weren ' t out
of frames of film yet for MSC- 10 .
It was still daylight.
Yes, it was st.ill daylight, that's right, and we
could still get some more good pictures, I thought.
Here we had instructions to start our Horizon
Scanner Sunset Check, and in looking through this
thing, it looked to me like that was the only
place we were going to get it; so I don't under­
stand exactly why we had to run MSC-10 and the
Horizon Scanner Check simultaneously. They
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