marisat-b press kit

8/7/2019 Marisat-B Press Kit

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NewsNationalAeronautics andSpaceAdministrationWashrngton.D.C.20546AC 202 755-8370*

PressKitForRelease IMMEDIATE

, Project ~arisat-BRELEASE NO: 7 6 4 3

Contents ,GENERAL RE&EASE........:.....e...................... 1-3DELTA LAUNCH VEHICLEoooo...o........oom....a...o.o. 4............TRAIGH$-SIGHT DELTA FACTS AND FIGURES. 5-6...............YPICAL LAUNCH SEQUENCE FOR MARISAT-B 7-8LAUNCH O P& ~ T I O N S , . . . . . . . . . . . . . . . . . . . . . . . . . . : . . . . . . 9'NASA TEAM...................^.^..^.^.^..^.^^^ 9-10COMSAT GENERAL CORP.,.............................. 11

.- - - - -- - - - - - - - - - - -- - - - - -(111SA-lleus-Release-76-83) . NASA T O AUNCHSECOND BABISAT POB COBSAT GENERAL COOP -( N A S A ) 1 2 p Unclas

43127


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N ! ewsNationalAeronauticsandSpaceAdministration' . >

t r IWashington,0.C.0546 I )AC 202 755-8310For Release:

' Bill O'bonnellHeadquarters, Washington, D.C. IMMEDIATE(Phone: 202/73518487) .. +.4 . :

RELEASE NO: 76-83

NASA TO LAUNCH SECOND . ~ R I S A TOR COMSAT GENBRAL,CORP.

The 98cond maritime satellite (Marisat) will be launcheda , 'by NASA for COMSAT General Corp. from Cape Canaveral, Fla.,

about May 27.1 ,

The spacecraft will be the second in the new Marisatsystem designed to provide communications t6 the :u.s. Navy,commercial shipping and offshore industries.

I ,

Marisat-B will be il'alaced into synchronous orbit. over'the equator above the Pacific Ocean at 176.5 degrees W,longitude just west of Hawaii. A third Marisat has been

t

built as a spare.


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T h e f i r s t s p a c e c r a f t , M a r is a t- 1 , was la un ch ed s u c c e s s-f u l l y Feb. 1 9 on a D e l t a v e h i c l e a nd i s i n o r b i t o ve r t h eA t l a n t i c a t 15 d eg re es W. l o n g i t u d e , w h e r e it has been pro-v id in g s e r v ic e on UHF f r e q ue nc ie s t o t h e Navy s i n c e March 25.

It i s p l an n e d t o i n a u g u r a t e f u l l - t i m e c om m erc ia l v o i c ean d d a t a co mm un icatio ns v i a b o t h M a r i s a t s a t e l l i t e s on J u l y 1.

A D e l t a r o c k e t w i l l p la ce t h e 655-k i logram (1 ,445-pound)M arisat-B i n t o a h ig h ly e l l i p t i c a l t r a n s f e r o r b i t of a bo ut3 6,7 90 k i l o m e t e r s ( 22 ,3 00 m i l e s ) w i t h an i n c l i n a t i o n o f 2 6d e g re e s t o t h e E a r t h ' s e q u at o r. A 293-kg ( 6 4 6 l b . ) a poge eki ck motor augmented by t h e onboard hydra z ine sy s tem w i l ll a t e r c i r c u l a r i z e t h e e l l i p t i c a l t r a n s f e r o r b i t i n t o a nEa rth- syn chr on ou s 35,788 km (22 ,30 0 m i . ) 2 .5 d e g r e e i n c l i n e do r b i t .

A t t h i s a l t i t u d e t h e s peed of t h e s p a c e c r a f t i n o r b i tm atch es t h e r o t a t i o n a l s pe ed o f t h e E a r t h t o ho ve r o ve r t h eP a c i f i c . S m al l g a s j e t s on b o ar d w i l l keep Mar isa t -B ons t a t i o n and o r i e n t e d p r o p e r l y to wa rd E a r t h t o r e c e i v e andr e t r a n s m i t s i g n a l s , From t h i s va nt ag e p o i n t t h e s a t e l l i t ecan s e r v e an a r e a o f a b ou t o n e- th i r d of t h e ~ a r t h ' s u r f ac e .


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COMSAT G e n e r a l w i l l r e i m b u r s e NASA f o r t h e c o s t o f t h el a un c h v e h i c l e , l au n ch s e r v i c e s and o t h e r a d m i n i s t r a t i v ec o s t s . COMSAT G e n e r a l h a s a r r a n g e d f o r a l l g ro u nd s t a t i o ns u p p o r t r e q u i r e d f o r t h e l a un c h and c o n t r o l o f t h e s a t e l l i t e .T h e r e a r e no r e q u i r e m e n t s f o r NASA gr ou n d s t a t i o n t r a c k i n go r command su pp o r t .

The D e l t a p r o j e c t i s ma na ge d f o r NASA's O f f i c e of S p a c eF l i g h t by NASA's Goddard Spa c e F l i g h t C e n t e r , G r e e n b e l t , Md.K enn edy S p a c e C e n t e r , F l a . , i s r e s p o n s i b l e f o r l a u n ch o pe ra -t i o n s . P r im e c o n t r a c t o r f o r t h e D e l t a r o c k e t i s McDonnelLD o ug la s A s t r o n a u t i c s C o . , H u n t i n g to n B ea ch , C a l i f . P r im ec o n t r a c t o r f o r t h e M a r i s a t s p a c e c r a f t i s Hughes A i r c r a f t ,C u lv e r C i t y , C a l i f .

(END O F GENERAL RELEASE. BACKGROUND INFOWIATION FOLLOWS.)


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DELTA L A U N C H V E H I C L E

F i r s t S ta geThe f i r s t s t a g e i s a McDonnel l Doug las mod i f i ed Thorb o o s t e r i n c o r p o r a t i n g n i n e s t r a p- o n T hi ok ol s o l i d - f u e l r o c k e tm o t o r s . The b o o s t e r i s p ow er ed b y a R o cke t dy n e en a i n e u s i n gl i q u i d oxygen an d l i q u i d h y dr o ca r bo n p r o p e l l a n t s . The maine n g i n e i s g im ba l- mo un te d t o p r o v i d e p i t c h a n d yaw c o n t r o lfrom l i f t o f f t o m ain e n gi n e c u t o f f ( M E C O ) .

Second S tageThe s eco n d s t a g e i s powered by a TRPJ l i q u i d - f u e l ,p r es s ur e - f e d e n gi n e t h a t a l s o i s g im b al -m o un ted t o p r o v i d e

p i t c h a n d yaw c o n t r o l t h r o u g h t h e t wo s e c o nd s t a g e b u rn s .A n i t r o g e n g a s s ys te m u s e s e i g h t f ix ed . n o z z l e s f o r r o l lc o n t r o l d u r i n g powered a nd c o a s t f l i g h t , a s w e l l a s p i t c hand yaw c o n t r o l d u r i n g c o a s t a nd a f t e r s ec on d s t a g e c u t o f f s .Two f i x e d n o z z l e s , f e d by t h e p r o p e l l a n t t a n k , h e li ump r e s s u r i z a t i o n s y s te m , p r ov id e r e t r o t h r u s t a f t e rt h i r d s t a g e s e p a r a t i o n . Twentv-two m in u t e s a f t e r s p ac e -c r a f t s e p a r a t io n t h e s ec on d s t a g e w i l l be r e i g n i t e d f o ro n e- s ec o nd b u r n . D a t a on t h i s b u r n w i l l be c o l l e c t e d f o rs t u d i e s r e l a t e d t o f u t u r e D e l t a m i s s i on s .T h i r d S t a g e

The t h i r d s t a g e i s t h e TE-364-4 s p i n - s t a b i l i z e d , s o l i dp r o p e l l a n t T h i o ko l mo to r. I t i s s ec u r ed i n t h e s p i n t a b l emounted t o t h e s ec on d s t a g e . The f i r i n g o f e i g h t s o l i dp r o p e l l a n t r o c k e t s f i x e d t o t h e s p i n t a b l e a cc om pl is he s s p in -up o f t h e t h i r d s t a g e s p a c e c r a f t as se mb ly .I n j e c t i o n I n t o S yn ch ro no us O r b i t

The D e l t a v e h i c l e w i l l i n j e c t Mar i s a t - B i n t o a t r a n s f e ro r b i t h av i n g an ap o g ee o f 3 6 ,7 6 2 km ( 2 2 , 8 2 7 m i . ) . A t t h i sp o i n t ~ A s A / D e l t a r e s p o n s i b i l i t i e s e n d. Command, c o n t r o l ,t r a c k i n g a nd d a t a a n a l y s i s become t h e r e s p o n s i b i l i t i e s o ft h e COMSAT and COMSAT G e n e r a l C o n t r o l C e n te r i n l.!ashinqto n,D . C . T h e c e n t e r s w i l l , f o r example , command th e anogee k i ckm o t o r on t h e f o u r t h a po g ee ( 4 3 s e c . b u r n ) t wo da \rs a f t e rl a u nc h , p l a c i n g t h e s p a c e c r a f t i n t o a q eo sy nc hr on ou s o r b i tof 35 ,78 8 km ( 22 ,30 0 m i . ) .


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STRAIGHT-EIGHT DELTA FACTS AND FIGURES

The D e l t a h a s t h e f o l lo w i ng g e n e r a l c h a r a c t e r i s t i c s :Heigh t : 35 .4 meters (116 f e e t ) i n c l u d i n g s h ro u dllaximurn D ia m et er : 2.4 m ( 8 f t . ) w i t h o u t a t t a c h eds o l i d sL i f t o f f W e ig h t: 1 3 3 ,1 8 0 k g ( 2 93 , 00 0 l b . )L i f t o f f T h r u s t : 1 , 74 1 ,4 7 5 n ew to ns ( 3 91 , 34 3 l b . )i n c l u d i n g s t ra p -o n s o l i d s

F i r s t S t a a e( L i q u id o n l y ) c o n s i s t s o f a n e x t e n d e d lo n g t a n k T ho r,produ ced by McDonnel l Douglas . The RS-27 e n g in e s a r e pr o-d u ce d by t h e R oc ke td yn e D i v i s i o n o f R oc kw e ll I n t e r n a t i o n a l .The s t a g e h a s t h e f o l lo w i ng c h a r a c t e r i s t i c s :D i am e t e r : 2 . 4 m ( 8 f t . )H e i g h t : 2 1 . 3 m (70 f t . )P r o p e l l a n t s : R J - 1 k e ro se n e a s t h e f u e l a nd l i q u i d

o xy g en (LOX) a s t h e o x i d i z e rT h r u s t : 9 1 2 , 0 0 0 N ( 20 5, 00 0 I b * )Burn ing T i m e : Abou t 3 .48 minu tesW ei g ht : A b ou t 8 4 ,6 00 k g ( 18 6 , 0 0 0 l b . ) e x c l u d i n gs t ra p - on s o l i d sS tr ap -o n s o l i d s c o n s i s t o f n i n e s o l i d p r o p e l l a n t r o c k e t sp ro du c ed b y t h e T h i o ko l C he m ic al C o rp . , w i t h t h e f o l l o w i n gf e a t u r e s :Diamete r : 0 .8 m ( 3 1 i n . )H e i g h t : 7 m ( 23 .6 f t . )T o t a l W e ig ht : 4 0, 30 0 k g ( 8 8, 6 50 l b . ) f o r n i n e4 ,475 kg ( 9 ,8 50 l b , ) f o r e ac hT h r u s t : 2 , 0 8 3 , 0 0 0 M ( 46 8,0 00 l b . ) f o r n i n e231,400 N ( 5 2, 00 0 l b . ) e a c hBurn ing T i m e : 38 s e c o n d s


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S e c ond S t a s e

Produced by McDonne ll Douglas A s t ro na u t ic s Co . , us in ga TRW TR-201 r o c k e t e n g i n e ; m a jo r c o n t r a c t o r s f o r t h e v e h i c l ei n e r t i a l g u id an ce s ys te m l o c a t e d o n t h e se co nd s t a g e a r eHa m i l ton S t a nd a r d a nd T e l e dyne .P r o p e l l a n t s : L i q u i d , c o n s i s t s o f A er oz en e 50 f o r t h ef u e l a nd n i t r o g e n t e t :r o x i de ( N2 04 ) f o rt h e o x i d i z e r .D ia m e te r : 1 . 5 m ( 5 f t . ) p l u s 2 .4 m (8 f t . ) a t t a c h e dr i n g .H e i g h t : 6 . 4 m ( 2 1 f t . )Weigh t : 6 ,180 kg (13 ,596 l b . )Th ru s t : About 42 ,923 N ( 9 , 6 5 0 l b . )T o t a l B u r n i n g T i m e : 335 seconds

T h i r d S t a g eT h ioko l C he m ic a l C o . TE-364-4 motor.P r o p e l l a n t s : S o l i dH e i g h t : 1 . 4 m ( 4 . 5 f t . )D ia m e te r : 1 m ( 3 f t . )We igh t : 1 , 160 kg ( 2 , 560 l b . )T h r u s t : 6 1 , 8 5 8 N ( 1 3 , 9 0 0 l b . )B ur n ing T i m e : 4 4 s e c o n d s


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LAUNCH OPERATIONS

The K enn ed y S p ace C en t e r ' s E x p en d ab l e V eh i c l e s D i r e c -t o r a t e i s r e s p o n s ib l e f o r t h e p r e p a r a t i o n f o r l a un ch o f t h et h ru s t- a u gm e n t ed D e l t a r o c k e t c a r r y i n g M a r is at -B .

D e l t a 1 2 4 w i l l b e l au n c h ed f r o m P ad A a t C om plex 1 7 ,C ap e C a n a v e r a l , F l a .The D e l t a f i r s t s t a g e a nd i n t e r s t a g e we re e r e c t e d onPad A A p r i l 15-1G. The n i n e s o l i d s t -r a p -o n r o c k e t m o t o r s

w e r e mounted i n p l a c e a r ou nd t h e b a se o f t h e f i r s t s t a g eA p r i l 1 9-2 3 a nd t h e s e c o nd s t a g e was e r e c t e d A p r i l 25 .The M a r is a t- B s p a c e c r a f t was r e c e i v e d d u r i n g F e b r u a r y ,

c he ck ed o u t a nd m ate d w i t h t h e D e l t a t h i r d s t a g e . The th i r d .s t a g e / s p a c e c r a f t a ss em b ly i s t o b e m ate d w i t h D e l t a May 2 0an d t h e p a y lo a d f a i r i n g w hic h w i l l p r o t e c t t h e s p a c e c r a f td u r i n g i t s f l i g h t t h r o ug h t h e a tm o sp he re i s t o he e r e c t e da t o p t h e v e h i c l e May 25.

NASA TEAM

NASA H e a d q u a r t e r sJohn F. Y ard leyJ o s e p h B . Mahon

P e t e r T. E a t o n

G od da rd S p ac e F l i g h t C e n t e rD r . John F. C l a r kR o b e r t S . CooperR o b e r t L i n d l e yTecwyn RobertsA l b e r t G , F e r r i s

A s s o c i a t e A d m i n i s t ra t o rf o r S pa ce F l i g h tD i r e c t o r o f E x p en d ab leLaunch Veh ic le P rog ramsManager, D e l t a P rogram

D i r e c t o rD e p u t y D i r e c t o rD i r e c t o r o f P r o j e c t sD i r e c t o r o f N e t w o r k sD i r e c t o r of L l is s i on a ndD a t a O p e r a t i o n s


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-10-

G od da rd C e n t e r ( c o n t d . )C h a r l e s R. GunnW i l l i a m R . R u s s e l l

R o b e r t G o s s

W i l l i a m B u r r o w b r i d g e

W i l l i a m E. HawkinsD al e C a l lRobley E. SawyerWayne MurryW a l t e r V . F r a z i e r

K en ne dy S p a c e C e n t e rL e e R . S c h e r e rM iles RossD r . W a l t e r J . Kapryan

Georg e F. Pa ge

Hugh A . Weston , J r .

B e r t L. G r e n v i l l e

Edmund t4. C h a f f i n

D e l t a P r o j e c t M an ag erD ep uty D e l t a P r o j e c tM a n a g e r , T e c h n i c a lC h i e f , f l i s s i o n A n a l y s i sa n d I n t e g r a t i o n B r an c h,D e l t a P r o j e c t O f f i c eD e l t a l \l is si on I n t e g r a t i o nE n g i n e e rNetwork Su pp or t ManagerN e t w o r k D i r e c t o rNetv;ork Op er a t io ns XanagerNe twork Op er a t io ns ManaqerNASA C o m m u n i c a t i o n s E n g i n e e r

D i r e c t o rD e p u t y D i r e c t o rD i r e c t o r , S pa ce V e h i c l e sO p e r a t i o n sD i r e c t o r , E x pe n da b leV e h i c l e sC h i e f , D e l t a O p e r a t i o n sD i v i s i o nComplex 1 7 O p e r a t i o n sManagerS p a c e c r a f t C o o r d in a t o r


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Edward J. M a r t i n A s s i s t a n t V ic e P r e s i d e n t ,Mobi le Sys tems, COMSATGeneralEugene T. J i l g A s s i s t a n t V i c e P r e s i d e n t ,E n g i n e e r i n g , COMSAT

*COMSAT G enera1 i s a s u b s i d i a r y of Communications S a t e l l i t eCorp. (COMSAT) .

May 7 , 1976

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