Astronaut Scientific Debriefings, 1962-1963

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lot of information about these flights.
Schirra = That was my intent in taking the exposure meter and the
Hasselblad because you took light values rather than F-stops
and shutter speeds and this means nothing ... those numbers.
The
light values connote exactly what you want to know.
Dunkelman - And a few of those and you've got it all made and
you know all the circumstances.
Schirra - Cooper will have this very same type of li ght meter.
Nordberg - You know why I asked this question, Larry, because
we are measuring visible radiation in one channel of the TIROS
satellite which is essentially the same thing as an incident
light meter measuring in one direction and when we compute the
reflected energy from the earth, it always comes out too little
which is the same thing as overexposed pictures .
Schirra = Sure, Sure.
It just depends on how much it sees.
I f it
sees the horizon, it's going to have some black in there relative
to the bright surface of the earth, so it averages it out.
Shoemaker = I ' d like to add some questions of my own to this.
You were over Africa during daylight on part of your flight,
were you not?
Schirra -
Oh yes .
Shoemaker - And how about Australia?
Were you over there during
daytime at all?
Schirra - No, never having daylight over Australia.
Shoemaker - I am curious as to how much detail you could see on the