Astronaut Scientific Debriefings, 1962-1963

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Scientific Debriefing
-22­
(MIT Horizon)
Dr. Peterson: The purpose of these pictures is that we are teying to
find definite informa.tion."about the earth for Apollo guidance. This is
of a group of four pictures taken in four_different yaw directions, one
the sun. Is this maneuver an expensive and troublesome· thing to do'l
Cooper: It takes control power; ·it takes control fuel, , it takes time.
However, it is not real expensive as far as fuel. You have to stay power
up.
We debated back and forth about 'the most accurate wa;y of making sure we· .
get these 90° points.
We were a little concerned about accuracy and decided
to stay powered up and utilized .the gyros ~o locate the 90°·positions. • But
it does take that period of time of power ·to dr;Lve the automatic system;
does take that fuel to move around•
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Dr. Peterson:
I noted you mention 25 hours 20 minutes.
A1; that ~t
there is a hole in the transcript.
25 hours and 26 minutes.
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·Co0per:
I got those at 25 hours and some odd minutes when the moon was set
in the west. It was right where ·we had plann~d to get it the first time.
We rescheduled them later in the flight if we didn't get them at the original· 1
time.
But I took them as planned initial.:cy,.
Did those come out all right'l
Dr. Peterson:
On two of those ~twas possible to locate. the moon.
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~ not all of them.
Bill .Armstrong: Yes, .these are all of them.
(Looking ·at p~ctures)
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