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Apollo 13 The Second ALSEP.Ei!!!. the E l l r l ~ Af) r ~ ,

o pe ra t lo n o f a ~ e c o n dpOIs,.i"" s " i a . . ~ lIon1l0r~ d " n t i c a l to t h a t opo r a t ill'l" On th e A pollo 12AL5EP so t h a t dat l l fro",d i f f e r " ,n t c

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Theae senso r s a re se l e c t edt ram the group oC s c l s n t l f i c in s t r umen t ' t h a t have been e s p e c i a l ~ly developed fo r l u n a r au r r ace ex p lo r .. t i o n . The da ta prov ided byt h i s mul t i - s enao r "y"tem .. 111 ba n a l y ~ e d and i n t e r p r e t ed under theguidance a t lIASA . " i " n t i 5 t 5 andPr inc ipa l I n v e s t i 9 ~ t o r .

A L S ~ P wi l l be e a r r i e ~ by anApo l l o 13 ... . s t ronau t IF i , ! " r . 1) to

.. l o ca t i on ".st o f th " Lunar Modul ..and deployed a .. shown in r iqure 2.Tho ALSEP equipment it . . . . . a rsdep ic t ed in r i9ure 1 .

Th.. to ur ex pe r i .." n t , t h a t co .. -p r i s e th s second ALStP wi l l b"l in k ed to the Cen t r a l Sta t i on byhe a t - r " s i a t a n t r ibbone o t wire .Designed and bu i l t by Bendix A eroepace , the C en tr .. l s t a t i on 1 .ALSEP'" cO \ ln lca t ion c "n t e r . Itcont .a ine th " r .. c e i v " r , da ta p roces ea r , t . r a n s . i t t e r and power .. ana9"'ment. con t r o l s fo r the expe r i . en t " .The aource a t power wi l l b .. ar ad io i so tope t h e r ~ o e l a c t r i e gene ra to r (RTG). t.he StlAF-Z7 bu i l t byGanara l E l . e t r i c . T ~ i a i a t ~ "amepo"",r "ource t h a t pe r fo ....ed 80r e l i ab l y on th e f i r 8 t ALSEP.

T ~ p r i .. con t r a c tua l r espon8i b i l i t y to r a l l the expe r i . e n t , ont h i s "ackage , " i t h t ~ e ~ c e p t i o nof the Lunar At",osphere Experi. . , ..n t ,w ~ a"arded to Bendix Aerospace . Amore de t a i l e d desc r i p t i on o t th eApol lo 13 ALSEP exper i . en .. , ",aybe found on tk e fo l lowing pages .

Al"" 11("'_"' 1Il ."

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=':. lO' D::"".tuUAll

"'"''''..-..., ......""""IoIDSubpackllg8 No.1

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SubpackBg& No.2

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O ~ ~ n d . r . t . . l l d i n q o f th. co . pos i t . ion o f t . h ~ i l l t . . r i o r o f t .h.ear t .h c o . " . i l l p a r t f r o . , "o l l i t .or in q . , a r t h ' l " . k . . . The . o t i o n p r o dllc v i b r a t i o n . . . h i , .h , t h .ytrav.l t .hrou9h va r i ou s t y p " . o fr ock , h a v ~ sp d . . .hi , .h ar. ch.racteri.rlc o f th e rock thrOl lgh..h ieh t .hey t . r . v e l e d .

ay e o r r ~ l . t i n q i n f o r - a t . l onf r o . a net. . .o rk o f 5e1 . . .o t.r.p l . e . d .t diff.r."t l o c . t . l on . onth e l u n . r .urfa"., th e o r i q l n o f i".ie "lq".l. . . Ill heco ., morec l e a r .

I n [ o r t i on . b o u t th e .truc-t u r e o f th o . oon may he lp toan .... r th e qua . t l o n o f It. o r i g I n /..he "h . r it i. p a r t o f th e lOa f ro . . .h ich th e r t h ....fo r d . o r . .ha t h e r it i a v t lo l lyun l i ke th e e a r t h , c . p t u r . dp i . e a o f th e e:o o . . Th i . intur l l .. ill h . l p i nd i e : . " . th e

PASSIVE SEISMIC EXPERIMENT

o r iq ln o f t h a a.rth and th e .olar.y.t .

Til "iIlIlO t.r Ul' byree :o rd inq th " 1I0t lon b.t.... n tv o..e i q h t . . On" .." i q h t , th e body o fth e I n . t r ~ . " n t , en e l o a " cond.. . ,1qht ..h i eh I. s u sp . nd sd on a. . . ry f l a " l b ) . h l n q . . Th" &"i o . e tell ' .. ill .0"" .. ith "h .. g round..h i 1 . th a . u . p end . d .... i g h " i".id.It t .a l ld. to r " Jn i obil.. Pour..n.or. o f tbi. t ypa all''' e :on ta i " .din .a e l l l ln i t pl.c.d on t.lla . o onfo r . " . a l l l ' i nq ill d i f f a r e n t d i r a c t i o n a .n d f r . q l l . n e l e

Thn s i t i v i t ) , o f t . h i . devie :eia . ue l l th.t, all Apol lo 11, i t .r e po r t a d ~ a t r o n a u t f o o t a t . p a .n d" h a i r . o v n ta i n a i d . th e LunarModul .

Tha P r in c ip a l I n v e l lt i, a to r fo rth a pa iv a S . i s . i e : E2pa r l . . n" i.Dr. Cary Latb o f Lon t C . o l o q i e:al Ob rva to l ' ) ' .

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Tha t th e ",oon has p r a " t i " a i i yno a tmosphero "an b'l ve r i f l ed~ i t h an i n expens ive L' l l06"ope .One wat "haa whe the r or no t th e11gh t fro," a a t a r dillla j u a t be -fo r s it p aaasa b eh in d th e 1lI00n.To ~ a t h a t th a moon has noa tmosphs r s a t all, however , la toaay t h a t t h e r e a re ab so i u t a l y nopi l r t !" l ' lB o f any k ind nea r I t sBur f ace . and t h a t iB an un l i k e l yCa . . . . .

While th s a tNosphe ra wi l l bevs ry s l i g h t , it Nay c a r r y t r a c s so f vo l c an i c gas sea , which w ould~ _ a l l a g re a t d e a l , ind' le

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Th" "bsenc" o f " s i 9n i f i e " n t" tmosphe r " and m"qn" t i c f i e l d onth e . oon ~ i l l " l l o ~ i l e i e ~ t ! s t B tous"' !t a, " l a r ' l " l a bo r a t o r y to t udy th e e l .. e t " i c a l 1y eh" rgedp a e t i c l .. s which i n h a b i t ou t " "apac" . Th . . . . . p a r t i c l e s , which.. re p a r t . o f a t om . , ~ i 1 l h"v", awid" r an9" o f apeeds and .. n" r9 i e5 .They w i l l hav .. a i t h e r po s I t i v e orneqa t ! v e char ' l e s and w i l l behevea c co rd i ng t o whe teve r " l e e t e ! c~ n ma' lna t i c f i e l d s t heee a,,"around th e 1Il00n,

Ob . . . rv in ' l e l l " . " p a r t i e 1 " . andno t i n9 wha t happens to t h a ~ n"a rt i l" aoon "ill

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\ f he the r o r no t U . ., moon ha sa 1II01ten co re a . th e e.rth is ..very impo r t . n t q u s s t i o n . 1I0t onlywould a ~ o l t e n co re i n d i c . t e ei.i-l a r o r i 9 ! 0 and d ev elo p .a nt o f th e1Il00n and th e e a r t h , bu t a mol tenco ra would i n d i c a t e t h a t vo l c an i c c t i v i t y cou ld have cauIOed manyo f th e . .o o n ' . s u r f a c e f e a t u r e s .If th e 1Il00n doe . no t have a ho tc en t " r , it lIlay literally be no th in '1 flIOre t han a bi '1 r o ck , fonn"de l . ewhe r e in th e co . " o nd cap t u r ed by th e ""rth'. q r .. v i t y .

A . e " s u r e o f th e i n t e r n " l h e a to f th e . oon "nd how t h a t h e a t d i s s i p a t e s throu '1h th e &loon wi l l i n d i c a t e no t on ly th " h i . t o r y o f thf!. o on . bu t its compos i t i o n as we l l .

The Hea t r low ! . :xper lment wI l ld e t e c t whethe .- 0.- no t the.-e 18 ..he" t flow th .-ou9h th " 111000 whlchis s i l l i l a . - to t h a t o f th e e a r t h .On tt." ea . - t h . ha .. t f low i. rei.t i v e l y un i f o r .....xc ep t In e e r t a l n

HEAT FLOW EXPERIMENT

r e910n . such as th a &lid-At lIOn ticrift.

The t " c hn i que o f th e h t t lowexp .. . - i . e n t 1 I . .p I . / two t . n - tOO tho l e s a re d r i l l e d In th e . oon anda cOllbin .. t io n o f h ea te .- / th .rmO I l. t . rp rob . . . i. in r t e d i n t o each ho I .E . .ch p robe earrie. s e v e r " l h."t.r.and t h " rmo . a t .. r.. The th"r l l lo l l le ter .l Ieasure t h e r l l a l 9 r " d i e n t . wi tha c cu r i l c i e . to O.OOSop. " e .... r e ~ e n t . i l re . " d e a l on9 each p robeand be tween p r o b . . . Both t pe .... -tur. d I f f e r en c e and h t conduCtivity "ill be . .ea . . . r . d .

Bee .uee Uttl. i. known o f th et h e r l prop.rtie. o f th e . o on ,th e He . t Flow xp . r im . n t wi l l bei:lblo to ...... r e . u b su r f a e e eeOlp"ra t u r e . ove r th e r . n g . - lOO1 ' to+1101'.

Th . P r in e ip a l lo v ee tig a to c fo rth e l Ies t Flow Exper i n t ioOr. Msreuo G. L a n ' 1 5 ~ t h o f ColuJObiaUn i v e n i t y .

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Apollo 13 ALSEPVital Statistics

P a ~ ~ i v e Seismic Senso r21 p o u n d ~

H ~ a t Flow E x p e r i M e n ~Weigh t , 10 poun

5 .0 . . . . tta

Ea r t h s c i e n c e .. , A ' l ' e ledy" .. Co . pany ; Ar t hu r D. LIttl", Inc.:Gu l t o n Industri"s, 11 ' 0 . , D a t a sy"t". , . D i v i s i o n ; The S " " d I xCorpo r a t i on . Researoh Labo ra to r i e s