Gemini 4 Experiment Debriefing, 1967

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<>n uorir-d S<J tt1i1.t d urlnp; the; clny sid.<.: one can :took and observe p hysically
what the day air glow is.
Now t his is very important b ecau se here we
have the orbiting . .
next year and very i mportant background prob­
lem.
Two of t he orbiting
. observatories . . . . . are above the
1:dr glow, t hjs air glow.
nut the day air- gl ow is much higher and uh,
at l ea.st , there ' s p;ood evidence in the rocket measurements that it ' s
higher and it ' s sort of u.ssoc:iatecl witli a red air glow.
And, so here 's
our situat ion where an o.etronaut was a1Jle to : mbjectively note the d i fference
between day and nip:ht in the (sky)
Uh, McDi v·i tt and White were able to
sec d1.')\v.J'l to 7tl1 antl 8t!1 lf'll:ll '.Tliturc r.; tar::; where as the other astronauts
were not al>lc to sec so well.
AgEr i .n i. t may be: 1:t question of time
(darkmcntation) perhaps not that much more t ime but uh, . . .
t hey were ge tting down to uh, the kinda of sensitivity . ..
that uh,
should be possible under , under good conditions of dull a tmosphere.
Uh, should we mention anything (about) the window (pane ) and uh, . .
to hear more about it, the question on did uy, White smear someth i ng on
Lhe window or tak e something o:ff w:i L:h ld s elbow or somethi ng.
It appeared,
rcom what w(~ heard, thn.t he tood sometl1:i ng oJ'.L' there h~s been some
nr:cumu.11;1 t i on ( 't) them ::.w:lt Lering tile mc<li um on Lhe wi ntlow and we took
:~omc (;!' :I t oJT m1<i ,rltcn it look at whnl. lie dici. they have to l ook inJ in
Lhr-0111•11
t.1 1<' w-i11dow , i L lnok.ed blac-k wlH-rc he ltnd. rubbed something off,
:;caU.vrinp: u !T W-:iJ1d.ow w·J1l<:l1 !ind. a1T11m1Llal:ion (>1' little particles which
1u·c; brou~hL or- ::a)lll\:tltJ np: wl1i<:li wo11lcl get in tlic light t he place where
he moved it :md. again j t lol)ked.
I\u t 1cl'ter nll the cockpit inside is