interplanetarymissiondesign handbook, volume i, part 3

284
JPLPUBLICATION82-43 ": InterplanetaryMissionDesign Handbook, Volume I, Part 3 Earth to Jupiter Ballistic Mission Opportunities, 1985-2005 _ '- / Andmy B. 8ergeyevsky .- Gerald C. Snyder ¢, (N ASA-CP- 16S9 l._) TNT__PPLA NF"a I_Y qI_S:UN Li83- 18775 DESIGN HA}IDBCOK. VOLrlRg 1, P.a._T 3: .P.._RTIt TO J£PITER P._LLI_TTC _.TSSICN CfFCF'ICNITII',S, 1985-233q (Jet Propulsion lab.) __BU p Ox,clas IIC AI3/MF AOI C_CL 22A G3/12 02865 December1, 1982 NaUor_ Aeronautk_ and space _n_nm_k)n Jot _ La_ CldWomkn Imlitum of Tech_ PaMdenl, California

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JPL PUBLICATION82-43 ":

InterplanetaryMissionDesignHandbook, Volume I, Part 3Earthto Jupiter Ballistic Mission Opportunities,1985-2005 _ '-

/

AndmyB. 8ergeyevsky .-GeraldC. Snyder ¢,

(N ASA-CP- 16S9 l ._) T NT__PPLA NF"a I_Y qI_S:UN Li83- 18775DESIGN HA}IDBCOK. VOLrlRg 1, P.a._T 3: .P.._RTItTO J£PITER P._LLI_TTC _.TSSICN CfFCF'ICNITII',S,1985-233q (Jet Propulsion lab.) __BU p Ox,clasIIC AI3/MF AOI C_CL 22A G3/12 02865

December1, 1982

NaUor_Aeronautk_andspace_n_nm_k)nJot_ La_CldWomknImlitumof Tech_PaMdenl, California

1983010504

• JPL PUBLICATION 82-43

Interplanetary MissionDesignHandbook, Volume I, Part 3Earth to Jupiter Ballistic Mission Opportunities,1985-2005

Andrey B. SergeyevskyG 3raid C. Snyder

December 1, 1982

NASANat!onalAeronauticsandSpace Administration

Jet Propulsion LaboratoryCalifornia Instituteof TechnologyPasadena, California

&

1983010504-002

1983010504-003

Abstract

]'hl._ doc.:'_e.I CL'qll_llil$ l_raphic:ll data .L'¢_'._._ll._ foI tile ptehi.lil:ll_ dL'.'ill_ll 0|" baUislic

IlltS._liSll._I_ .Ili|_lll'l. ('L_ll|t_tll,_ 0|" I_llll£h L'll¢[l_._ IL'LlllZlL'lllL'lll,_, _15Wt'i] ;I._ In:lll._ ollt¢'l

I.Itllldl ,lIlt| .IIIl_llt'l ;illlV_ll p31.11llt't¢'l$. ;Ill." I_lt'st'lllt'd I!l I;Itllldt dillt" 311lV:l] d31@ $|l-'le'L"

tL_l .l!l I,nlllCh t)i_plHllillltlt'5 |'lL_lll Iq')_._ thlOtl_h 2l)L)._. hl addl|lllll, :lIt t'XIl.'l|xl¥_ It'.Xl I$

lll_'itidt'dWitk']l¢%.pl:ltll,'_tlIIS$1tH|tl¢_Sl.l_llIlICtht_J._,.IlL,IlllilllllL'h_._lttdL_%1,JcYt']_plll¢'lllto

]Iip11elpie,be.rodL_ibltct,itiiv:llde._tl_,,iltill_IIll"the _t,II_llt¢:IId,il,IIlllhl._v_hlI,e iI$

wellil_IIIIIII¢.'I,_II:it'qllilll_It._I_'I,11111_,_JllOll_p.llillllt'l¢l.',.'l'hl._l._|he 111._I_I",Ip]iUlllt'd

_'_ies"f llll._._I_i_Je,_l,_lld_CIItlleltl._which will:Ippl_l_ .Illpl,I'let._,rod,_om¢ _lhel bodies

iii|lieiOLli._%1.I¢'III.

IIi

1983010504-004

Preface

This publication is one of a series of volumes devoted to interplanetary trajectories ofdifferent types. Volume 1, of which the present publication is Parl 3, describes ballistictrajectories. Parts 1.2, and 4, which will be published in 1983. will treat ballistic trajec-tories to Venus. Mars, and Saturn, respectively.

1983010504-005

Contents

I. Introduction ..................................................... 1

II. Computational Algorithms ...................................... 1

A. GeneralDescription............................................. 1

B. Two-BodyConicTransfer ........................................ 1

C. PseudosteteMethod ............................................ 3

III. Trajectory ChamcteriMics ..................................... 4

A. MissionSpace .................................................. 4

B. TransferTrajectory............................................... 5

C. Launch/injectionGeometry ....................................... 9

1. LaunchAzimuthProblem .................................... 9

2. DailyLaunchWindows ...................................... 10

3. RangeAngleArithmetic..................................... 15

4. ParkingOrbitRegression.................................... 16

5. DoglegAscent ............................................. 17

6. TrackingandOrientation .................................... 17

7. Post-LaunchSpacecraftState ............................... 18

8. OrbitalLaunchProblem ..................................... 18

D. PlanetaryArrivalSynthesis ....................................... 18

1. FlybyTrajectoryDesign ..................................... 18

2. CaptureOrbit Design ....................................... 24

3. EntryProbeandLanderTrajectoryDesign .................... 28

E. LaunchStrategyConstruction..................................... 31

IV. Description of Trajectory Characteristics Data ............... 32

A. General ........................................................ 32

B. Definitionof DepRrtureVariables .................................. 32

C. Definitionof ArrivalVariables ..................................... 32

V. Table of Constants ............................................. 33

A. Sun ........................................................... 33

B. Earth/MoonSystem ................................... 33

C. JupiterSystem, ..................................... 33

V

• i

1983010504-006

D. Sources ....................................................... 33

Acknowledgments .................................................... 34

Refe,ences ............................................................. 34

Figures

1. The Lambert problem geometry ................................... 2

2. Departure geometry and velocityvector diagram .................... 2

3. Pseudostate transfer geometry .................................... 3

4. Mission space in departure/arrival date coordinates,typical example ,. 5

5. Effect of transfer angle upon inclinationof trajectoryarc .............. 6

6. Nodal transfer geometry .......................................... 6

7. Mission space with nodal transfer ................................. 7

8. Broken-plane transfer geometry .................................. 8

9. Mission space with broken-plane transfer, effective energyrequirements ................................................... 8

10, Launch/injection trajectory plane geometry ......................... 9

11, Earth equator plane definitionof angles involvedin thelaunch problem .................................................. 10

12. Generalized relative lau'lch time tRLTVS launch azimuth _Land departure asymptotedeclination,_z ............................ 11

13. Permissible regionsof azimuth vs asymptote declinationlaunch

space for Cape Canaveral ....................................... 12

14. Typical launch geometry example in celestial (inertial) Mercatorcoordinates ................................................... 12

15. Central range angle () between launch site and outgoingasymptote direction vs its declination and launch azimuth ............ 13

16. Typical example of daily launch geometry (3-dimensional) as

viewed by an outside observer ahead of the spacecraft .............. 14

17. Basic geometry of the launch and ascent profile in the trajectoryplane .......................................................... 15

18. Angle from perigee to depaff.ure asymptote ....................... 16

19. Oefinition of cone and clock angle .............................. 17

20. Planetary flyby geometry ..................................... 19

21. Definition of target or arrival B-plane coordinates ................ 20

22. Two "_-axisdefinttic,-s in the arnval B-plane .................... 21

23. Defintbon of approach onentatK)nalcoordinatesZAPSand ETSP. ZAPE and ETEP .......... 22

vi

&

1983010504-007

24. Phase angle geometry at arrival planet ..................... 22

25. Typical entry an(; flyby trajectory geometry ............... 23

26. Coap_-,daland cotangential captureorbztinsertiongeometries ..... 25

27. Coapsidal capture orbit ,nsertion maneuver .IV requ,rements

for Jupder ......................................... 26

28. Coapsidal and intersectingcapture orbit ,nsertion geometnes ......... 27

29. Charactenstcs of intersectingcapture orb,t ,nsertmnand

constructionof optimal burn envelope at Jupiter .................. 29

30 Minimum ._V requ,red for ,nserhoninto Jupiter captureorbit of

given apsidal orientation ................................. 30

31. General satellite orbit parameters and precessK)nalmot,ondue

to oblateness coefficient"/2 .............................. 31

32. Voyager (MJS77) trajectory space and launch strategy ............ 31

Mission Design Data Contour Plots,Earth to Jupiter Ballistic Mission Opportunities,1985-2005 .............................................. 35

1985 Opportunity ...................... 37

1986 Opportunity ......... 49

1987 Opportunity ............... 61

1988 Opportunity ....... 73

1989 Opportunity ..... s5

1990 Opportunity 97

1991 Opportunity to9

199213Opportunity 121

199314Opportunity f33

199415Opportunity t45

1998 Opportunity 157

1997 Opportunity 16,.3

1983010504-008

1998 Op.r_rtunity ,e:

19S3 Opportunity 1_.;

2000 Opportunity _._

2001 Opportunity 217

2002 Opportunity 229

2003/4 Opportunity ."41

200415 Opportunity 2._

2005/6 Opportunity ._5

1983010504-009

I. Introduction but certainl_ nut unrealistic nsing future urbital assemhlyl*'t'tl niqlle'_.

The purpose of tl,ts series of Mission i)esign Iiandh.oks isto provide trajectory designers and mission planners with A separate series of vohnnes (Rel, 3l is being published

graphical trajectory inlornlation, sufficient for preliminar_ concurrently to provide purely geometrical {i.e.. trajectory-

interplanetar_ mission design and evaluation, in ernst respects independent) data ol planetary positions and vi_,'in',_ortenta-

the series is a continuation ,if tile previous three _,ohltnes of tion angles, expeuenced by a spacecraft in tile vicinity of these

tile Mission Design Data. TM 33-736 {Ref. I I and its predeces- planetary bodies. Tile data cover tile time span thr, utgh 2020sots [e.g.. Ref. 2}; it extends their coverage to departures A.D.. ill order to allow sufficient nlission duration time tot all

through tile year 2005 A.D. I-arth departures, up to 2005 A.I).

The entire series is planned as a sequence ofvohlmes, each Tile geonletrit" data are presented in graphical form anddescribing a distinct mission mode as follows: consist of 20 quantities, combined ,, ",, eight plots fi_r each

caler.dar 3,'earand each target planet. Tilt .,raphs display equa-Vohmle 1" Ballistic (i.e.. unpowered) transfers be-

torial declination and right ascension uf i'arlh and Sun (plan-tween Earth and a planet, consisting of

etocentricl, as well as th,_ of tile target planet (ge-cemricl;one leg trajectory arcs. For Venu_ :(nil

heliocentric (cclipticl longitude of tile planet, its h21iocentricMars missions tile planet-tt,-Earth return

and geocentric dist;lnce: cone angles of l-arth and ('anopus.trajectory data are also provided, clock angle of l-arth (when Sun,'Canopus-,ric:_tedl. l-arth-Sun-

Volunle i1: Gravity-Assist IG'AI trajectory transfers, planet, as well as Sun-Earth-planet angles and fin:ally, rise and

comprising from two to four ballistic set times for six deep-space tracking stations assuming a t_-deg

interplanetary legs. connected by SilO- horizon tnask. Tilts information is similar to that ill the secondcessive planetary swingb_ s. part of each of tile vohlnles previously published (Ref. 1).

Vohlmelli: Dt,lta-V-EGA (AVI'.GAI transfer trajec-

tories utiliting an impulsive deep-space II. Computational Algorithmsphasing and shaping bum. fi_llowed b._ a

return to l'arth f,,r a G,'A swingb.v nl:lnell- A. General Descriptionvet taking tilt' spacecraft (S ('t t,_ the

eventual target planet. rhc plots for tilt' entire series _,ere computer-generated. Alninintunl of editorial and gr:lphic suppoit was postulated frt,,n

Each volume consists of several parts, de.,,cltbllig tralecto L the outset in an effort to reduce cost.opportunities fur Illt_Mon._,toward ,,pecfflC talget el ,,wingb%

l_tdtes. A number of computer progra:ns were created and/or tnodi-

This Voh(nle l. Pall 3 of the' series is dew_ted to baUistic fled to suit tile needs of the llandhook productio,i.

transt_'rs between I-arth and Jupl.ter. It ,.,,..scribes tlaiectoric.,,lhe computing effort involsed tile generation el arrays eltaking from I to 5 yeats of flight time tt,r tile 20 successive

n,issiol) opportunities, dep:lrting l-alth ill tile folhtwing ye:lr.,,: transter traieclor._ arcs conuecting departllre :rod arri_,al10I'IS. IriSh, I()H"_. ItlSg, It),_tl. itlttt}. It)el. IOO2,:3 lilt)3 4. planets on a large nunlber o! ._uitable d:ltes at each body.

• • _ , AIgorlthnls tconlputational int_delsl to ,_t_lv.."tills problem CallJell4'. ¢,. ]t)t)O, ] t)Q7. Iqt)8. l tlt)tl. 2|)00. 2Ill)l, .00_. _IX)., 4.2004 S. and 2ties t, V:lry grcatl_ as to their coml_lexity, c.st t_l data generated, and

resulting data accuracy. In light of these ctm:'idelations, tilechoice of lllelhods used In this elloft has been "lSSCs.,a.,d.

Individual valiahles presented herein are described in det:lil

in subsequent sections and sunlmarited again in Section IV.B. Two-Body Conic Tr,,nsfer

Silt'rice it to say here that :ill tilt, data ate presee:e,I In ,_ets:d

I I contour plots each. dlspla._ ed till the ]allnt.ll date arrival !- :oh departure attltal dale COlltblnalt.tn ;CplC.Setlt',. a (Itlltl(le

•late space 1"Oleach oppt,rtltllit_. Required depilltllte eneig_ flair, let tlalectt_l_ bel_,eell two ,p, .ttwd bodle,,, it the Ill(.'lbel

('.t, departure a._._nll_tOt, dechl_:ltlOn anti light il_,cen,Mt_ll, el Iclohlthtll,, tit the _pa_:e_latt .ibt,tll tile pllltlal_, le._z, the

arrival I:. and its equahut;tl dlrCCtlOll'_, ,Is _ell .', Still and SIllll I, ,,pe_ !led l;-te I .tlnbelt lheol¢lll ptO_,lde', a ,,ultableI-alth dlreCtltql angle,, _tth respect to the tlelt4rtute atllt,ll Ilattle_olk |.tl tilt' , 'lllptll,ltltHI t_l ,,ut.h tlale_bttle',, btil

as._nli'ttote,.i, ate ple.lentetl, t_[l]_ It l t.',,,tllcted t_,tt hods, _..ttlll_,. lllOthtll prec,.ill, ,..

It should be '" led that pall .... l lilt" l.lltlh l, ,pa,¢ ,'t,_, ..,i Ige,,trtctt.'d two-bod_, lutttlon ItUlqlC,, th.lt tile d_nanlt_:al

In,l_,. tell(lit,: I,iLlHdlet enelgh", not ple,,entl_, I "d.%3) a_,atl,ible. ",A_lelll CItII._,I_.I,.,tit Olll_, t_&t_blare,,, one el _ltt,lt. th,- pllmat_,.

i

1983010504-010

ORIGINALPAGE moFPOOR

iss,,..,oh ntore,.assiv.tha.th. other,that:ill ,,t the'_yste,.'s ! 1

gravitational allraclioll may he . _stlnletl as c, mcentrated at :n [_ ........... 2a- - -point tile center ol It:at primary body. Ihe sect.adary hod)

lerian(coniclorbitsabout tileprimary(e.g..theSunl insuch

a wa_ that the center of the primary is located at one of the

foci of the conic (an ellipse, palahola, or hyperhola). _"s

tati,,lal parameter _ (al_ known as GM) for the central hod', EARTH ....

the time of Ilight between two arhitrar], points in space. __ _('- _"_"= = ;J_ _"._L.V"R I and R,. Is a function of onl), three independent variables: _ _PLANET

the sllnl of the distances of the two points fronl the fi)cus, _ /IRnl + IR21, the distance between the two points C = IR: - R I1. /

and the semimajor axis. a. of the conic orbital flight path T=/(R 1 +R 2 .C,a) /between them (Fig. I.J

l)etailed algorithm descriptions of the Latnbert method, in. Fig. 1. The Lambert problem geometryeluding necessal._ branching and singularity precautions, are

presented in numerou_ publications, e.g., Refs. 2 and 4. The

computatk)ns resuh m a set of conic classical elemel_ts (a. t'. i. the hyperbolic excess velocity, '"I,:infinity'" or simply "'speed"

[2. to. vI ) and the transle_ angle. A%:, ol Iwt_ equivalent (e.g.. Ref. 4). TheY.. represents the velocity of the spacecraft

,,pacecratt heliocentric velocl() vectors. Vh,v¢.¢ one at depar- at a great distance t'rom the planet (where its gravitationa _lure. the othei at the alrwal plaaet Suhtlactlon of Ih," '_pl, o. attraction is practically negligiblel. It is attained when the

priate planetar_ heliocentric velocity vector. Vhpz..4.x._.r. at spacecraft has climbed away from the departure planet, fol-the t_,o corresponding times t'rom each of these two space- lowing injection at velocity VI:

craft ;-locity vectors results in a pair of planetocentric velocity

7,states "'ai iilliillt} ""with re._i,ect h_ each planet I ir:ig. 2)

I.. i '_ 2Pl= -"r--"7 . km • (2 I

V.. ""Vh3;:¢..it , - Vhpl.,4.'¢l"l t ( ilor before it starts its fall into the arrival planet's gravity well,

where I = I and 2 refer to positions at departure and arrival, where it eventuall> reaches a closest approach (periapse, C/.4 I

resl,ectivel,_. Th:' scalar of tins I" vector is also referred to as velocity I'p.

Vllt I1_111

11[l | (etll_l'a

.. - " A_iy _ilp h I l I Viii

k ,_Sl I_ [ "" VIII IKII{ . Jr-i- ,.,.,,,,,,, .I..//I / _ _'" ,,..,, ill

....

X _ '.._ .% ,' ' i[llli I I |

v

Fig. 2. Departure geometry and veloc0Wvector diagram

1983010504-011

ORIGINAL PAGE g

OF POOR qOALrI_

-- 2/_+ Pseudostate theory ts based on the assumptlun that for|p = 2_ + --" . km/_ (3) modest gravitational perturbations the spacecraft conic mot,t,.:

I"- 2 rp about the primary and the pseudo<oat displacement due to athird body may be superimposed, if certain rules are |olh)wed.

1 he variables r I and rp refer to the departure injection anda,rivai periapse planetocentric radii, respectively. Values for The method, as applied to transfer trajectory gener'ttion.

the gravitational paranlet_r p (or GM ) .'iregiven m _ubsequenl does not provide a flight path og,ly its end states. It s-Ires theSection V oil constants, original Lambert problem, however, not between the true

planetary positkms themselves, but instead, between two _om-The V. vectors, computed b_ the Lambert tnethod, repre- puted "'pseudostates.'" These are ohtamed b_, tte_at,or, on tw.

sent a body center to body center transter. They can, however, displacement vectors oft" the planetary ephemeris positiorls on

be translated parallel to themselves at either billy without the dates ,,f departure and arrival. By a ,+uttable superpositttmexcessive error due to the offset, and a great variety t:f r*; .istic with a planetocentrtc rectilinear mlpact hypelb-la and a

departure and arrival trajectories ma) thus be constructed constant-velocity. "'zero gravity." sweepback at each end of

throu_, their use. to he discussed later, fhe magnitude and the L.ambertnan conic (see Fig. 3). a _atlsfactol3' mat,:h i_directk11, of I:. as we'J as the angles that this vector f,)rms obtained.with the Sun and Earth direction vector._ at each terminus, are

required for these n:ission design exercises. Of the five ar_ it,v,ivcd in the iteration, the la_t three

(h,watd._ and at Jupiter) act over tile lull II,ght lime. ,.X712.Nh_d :;_ • tl,e relatively small terrestrial planets are suited and repreyJnt:

to I. • analy,,ed hy tile Lambert metht,d, as the problem can he

adequately represented by the restricted tw,-hody formula- (IJ Conic heliocentric motion between the two pseudo-

tion. resulting in flight time enors of less than I day an states R; and R; (capital R is used here for -'-'11hell,accuracy that cann-t even be read from tile contt)ur plots centric positionsl.presented in this d-cument.

12) The transformation of R_ to a plane|Been|rio position.it *

r2 [lower case r is used for planetocentric positions).C. Puudostate Method performed in the usual manner is followed by a

"'constant-velocity'" sweepback in _ime to a point

Actual precision interplaneta_ transfer tralectories, espe- r_ "--r_ - V. 2 X .XTt2. correcting the planetocen'.iccially tho._ inv, dving the giant outer planets, do noticeably position r 2 to what ii would have heen at T I, had

violate the assumptitms inherent in the Lambert The,tent. th,':e bee,i ,,o solar attract,oil dur,ng ,.XTlz. andThe restricted two-httdy pr,blem, on which that theorem is |,nail).

based, is supp,sed to de._ribe tile tunic liB|ion of a nl._ssles_,

•,t.,ondarx li.e., tile spacecraftl about the point mass of a pri. 13) The planetocentric rectil+.near incoming h_perbola.mary attractive bode, (i.e.. the SunL both objects beat| placed charactel,zed h) m_t_mmg |'-nntmtt) V.,. ,t ,adtal

in an otherwise crept) Universe. In reahty, the gravitational _.---

a:'ractlon ol either departme or target |,od_ ma+_,significazltly -" _" "" "" "" "_.

ah..r tile etltlte tgansl'er trajectt+r.x.l

/ NO-GRAVITY X

Nm.eflcal _-h.d._ tr;,Icct-l_ integration could hc called I SUN SWEEPBACK • _,

upon t, represent the" true physical mt,Je! h,r the laws of /R1 "" -Voo",X _T.,,., !,,,t,tit)P.. hut _.-uld be too _..+tl._. _.t)i1_Id¢,,i,t_the numhel ol EARTH.'JI_-- .c Iz | I

,-,,,plete t,-,le,t-,le, ,¢qt,,¢d t,, lul,+_ ,ca, ell-.1,d des,,tbc., _R_ _ Ira. \ ra RECTI'LINEAR

+t,,e,I ,n,,,,,m ,,l,p-,tm,it.'+ _ • -.m_..,_ _.+j_ HYPERBOLA.

The p,_z.d.,,tate the.r._, tu,,t intr.duccd h.+,S. 9, _,li_m r; - R; - R_ - '"_+_1 _

I Ret. -_| and modtlicd t, _dvc Ihe thlee-bod_, Lambert p,t)h- " _ -1 JUPITERlent h_ D. V B,,mes IRet. 1,1. rel'reu:nts an extretnd,, usetul jf

inlpgovenlent o_,el the st-',ndald [.anlhclt udUtlOn l:o, the LAMBERT CONIC /r_giant p+anet mis.tt,ns, it Call correc about q5 pezcent ot tile AT12 / R_- R 2

three-hod) ellOl+ int_ufled, e+_.. U|+ to 30 d.l) _. 11, t]tght little tln

a Juptt¢,-hound i,,'ul,e) Fit 3. P_ottew teen|fee geometry

I

1983010504-012

OR;GINAL PAGE ISOF POOR QL,_ALITY

*aW" ,-a.... * ;'"P""* .,.a a *-;p *;"," A7_a ';..'-' r_ ...... I.. ;. thus ,I,._..,hl..- ..,. a"y da_,.... .I.;., ;, ....... .... ,h..to perijove, which can be _llslied b_, tteratic:n -n the capability (rf a given launch/injection vehicle must equal or

r_-magnitude and ,hus al._ on R_. exceed the departure energy requirement for a specifiedpayl.ad weight.

This last aspect provides for a great simplifiL,flion of the

formulation as the R_ end-point locus now moves only along In the coprsc of time the_ minimum departure energy"

the V. z II r; vector directkm. The resulting reduction in com- opportnnities do recttr regt,larly, at "synodic periou " mtervals.puting or,st is significant, and the equivalence to the Lambert reflecting a repetiti.n of the rcmtive angular geometry of the

point-to-point crmic transfer model is attractive, two planets. If _l and to 2 are the orbital angular rates .f theinner and outer of the two planets, respectively, m-ving about 'Ill

The first two segnlcqts of the transfer associatetl with the the Sun in circular orbits, then the mutual configulation of

departure planet may be treated in a like manner. If the planet the two bodies changes at the following rate:is [:arth. the pseudostate correction n,a_v he disregarded It :'.

R; = R n ). or else the duration (,I Earth's perturbatwe etfect COl2 = coI - co: . radis (41may be reduced t, a l'ractton of ATI_. It can als, he set Its

equal a fixed quantity, e.g../aT = 29 days. The latter value If a period of revolution. P. is defined aswas in fact used at the Earth's side of the ttansfe, ,n the

data generation process for this dt)cunlent 2nP = -- . s 151

Tbe rectilinear pseudostate method thi._s inwdves an itera

tive procedure, utili/ing the standard l.ambert algorithn: t- then,btain a starting set of values fi,: |'. at each end .f the trans-

ter arc This first guess is then improved by allowing the I I I

planetocentric pseudostate ptrsititrit vector r_ to he scaled t,p 17s = Pn-- I"-_ (b)and dt)'ia,n. using a suitable partial at either bod_, ,,uch that

ATRe..(I. the :tree required t'_ fall along the rectil,neat hypel- where Ps. the svinodic, period, is tl.e peri,d of plan,'tar_.

bola through t_ (the sum of the sweepback distance |'., geometr_ recurrent-', while I' I and P2 are the orbital "'siderealx. AT and the planetocentric dtstanh.e ir: I1. equ:nl the gra_,lta- ii.e., inertial) peri,ds'" ,rt" the inner (faster) and the outer

ti.nal perturbation dural,on. AT B,th r: and V . al,utg (slower) planet considered, respectiveb,._,luch the rectilinear fall -cculs. are contmuousl,, reset ,itih/-

" ._ the latest _alues of magnutude and dirtctl, n ,f V at each Since planetary t,rbits :ire neith,'r exactly circular nor co-

end. i. ot file new Lambert transte, .tic. as the Iteratl_qi plo. planar, launch opportt,r:,ies do ntrt repeat exactl'.,, sonic

gre.,,ses. "tile procedule com, erges ral':dl_ as th,: h._l_.'rboluc trip )'ears being better than -thers in energy requJrenlents or in

time discrepant). AAI" : A7_/. V - AI_. tall,, below a preset other parameters. A c-mpl,:te repeat of trajectory character-

small t-lerance IStlCSoccurs ,nly when exac'i_, the same orbital geonnetrv ofdeparture and arrival hod.,, recurs. For negligibly perturbed

Once the V. _,ectors at each planet are converged upon. planets approximately identical inertial positions in space attire desired output variables can be generated arid contour departure and arrival imply near.recltrre,.¢e ,rt" transfer tra-

plotted h_, existing standard alg,,rntluns, ject.l_, characteristics. Such events c-n rigorot,sb be ,.¢sessed

only for nearl_ res.nant nonprecessing planet;,-_ orbits. I.e..

t'-r those whose periods can be related m terms of Integer

III. Tre.lectory Characteristics fiactions. For instance, ff five revolutions of one hod._ cor-

A. Milmion Space resp.nd to three rewdutt:,,ts of the _ ther. that ttme intervalwould constitute the "'period of repeated characteristics."

All realistic laun_.h and mlection vehicles are ener_:.,,-Imlued Near-integer ratios provide nearl._ petitlve configurationsand imptw_ vet) stringent constraut',_ on the mterplar,.ta,._ Xtlth lespect to the hnes t,t apsldes and rtodes. 1"lie i-arth.

mission selection prt_ess. Onl.,, tht,w transfer opp, • . ". relative synt_llc period ot Jupiter ns 3tlS F,N4 days. I.e.. about_hlch occur near the tnl*eS o|" a nlullniunl I-arth , .. 13 nlonths, i'ach c_cle ol I I ctrnsecutive Jovian mission

erlelg) reqt:denteflt ale thus of plactlcal interest. I 1, . -'h,-" ttpllortUllitleS 41nodnts It+4.1N"T7 d.'._ $and ts neatl) IepetltlVe.side or' such an optunal date. departme enetg.*, lib're. ,% lizst del,,,.n b._ Jt,pltet's sidereal perl-d ot I I St,2t) )ears ,r 4332.bslov.ly, to,breed b_ a rapid inc_e.,_', th,ls lequirmg "'¢,,:,¢_ a da_,s It h oh_,l, ttl', that Iol an Id¢llth.al mutual Jllflll,ll Scott1

greatel ]auncll eap,thlllt_,., ol altetnatlVell,, d h_v.et .dl, twable et_. Jupltc_ _otlld be h,tlnd he_,olld.. Its lit, trial po.dtl',n lit the

payload i|la.¢_. A "'launch period." measured tit da._s ,u esen pl_.-t,httls _._,,.[¢I_, ¢_KI dd_s Ihttl|ll t*| Ilhtllttlll4 ¢_N,!¢¢1 whtl,"

4

d

1983010504-013

ORIGINALPAGE mOF PoOR QUALITY

Faith wo,ld hart. ¢_mq_lelt'd43_L7.7/.thS.25 =- I_.(ll 3 levLdu i:n "- i'21/2. Arrival date c_weragewas set at 1600 days to dis-

Illql.%bcllUg.',headL_Ililt" ,rid innalkhy lilt" ._lne anllAlllalaltiOtnill play lUiSsitll:s|'11)u11I- h_ ._-yt"arsflight lime,

aS J tipItt't

The m:drix _st"t|t.parfllre :lrac| :lrriva| dates to he presented

A variety of _.o.sidt'uations fore," fine realistv la.ncln period comprises fine"'nli.ssionspace" l'*_reaclndeparture opportunity.

!not tea tlCClll at line nlilliin,lln energyCol.lti,, ,lion o1" depar-

ture and arrival datt's. I,auncln vehiclt, readinL..,,sstatus, procc- B. TramslerTralocto_d,nre slippage, wea;;ter anomalies, multiple launch strategies.arrival characteristics all causefine lanmclnor. nmre generally.

the departure period to hr. extended ,wet a mnmher td'days or As previously stated, each pair of departure/arrival dates

weeks and not unecc_arily centered on the mimuumm e,erg: specifies a unique Lransfer trajectory, l-aeh s, ch point in theJale. missio, sp:tce ha._ a._sociated with it ;in array of descriptive

raft:dales. Depart,re enetg)', clnaracteri/tJ by Cj, is by far tlne

For this docunnetnt, a 1 20-day departure date coverage span inlOStsignificant among tlne_, parameters. It incre:nses It)wards

was selected, primarily m t_rder to encou=npass launcln t'ner&v tlne ,'dges t)f the miss|tin space, hut it :tist_experiences a dr-"--

requirements ¢_t"up tt_ a {'3 = 200 kltz21 b2 t.'ontour, where n:.ttlC rise ahmg a "'nidge," pa._sing diag, mally from lower leftL'.t = |":1' i.e., twits, the injection en|er&v per unlit inlay, tt_ upper riglnt acros_ tlne n|issnou space (Fig 4). This distur-

t_AinTtt JLJPITEtul198b. ('.]1. . I f l

HAL I. IST I¢ r RANSF nH TFIAJt C'i t][l_

,caO/Ol/_.q . 48100 5

90104119 48000.5

qo;01109. ' 47900.b

a9'10,'01 47800.5

89:06;23 4 i lO0.b

89:03' I b 4760U,5

HE I._,Ob 415 _" ,,5

41400.bq l_ILnll,;' J',

I

8H'tll,'19 ' 47300 b

er 8tl'(n_,L_t.l 41200.b _.

H1_11111! 41no0 5

.ql,Ol:24 47000 b

81 tMI I b 46900 h

81/01 _tnh .46800 5

86:t19_2/ 46700 b

86 'nHi'19 ' ,4C,_Ll13',

H6 0.1 1I ,4tL%00 b

I AnlNt'!l liar1

4111! !_ !1 4n11bb _,, 461qb !'= 4623b b

I ALINt:tt j|l :40t_)01l tl

Fig. 4. Mission space in departure/arrival date coordinates, typical example

1983010504-014

r "" ORIGINAL PAGE ISOF POOR QUALITY

bance is a_uciated with all diametric, i.e., near-!gO-deg, out of the eclivtic and forces a polar 180-degtransfer, inordertransfer trajectories (Fig. 5). to pick up the target's vertical out-of-plane displacement.

In 3-dimensional space the fact that all planetary orbits are The obvious sole exception to this rule is the nodal transfernot strictly coplanar causes such diametric transfer arcs to raison, where depiuture occurs at one node of the targetrequire high ecliptic inclinations, culminating in a polar flight planet orbit plane wRh the ecliptic, whereas arrival occurs at

; path for an exact 180-deg ecliptic longitude increment be- the opposite such node. In these special cases, which recurtween departure and arrival points. The reason for this every halfofthe repeatability cycle, discussed in the precedingbehavior is, as shown in Fig. 5, that the Sun a,_d both trajec- paragraph, the transfer trajectory plane is indetenzinate andtory end points must lie in a single plane, while they are also may as well lie in the departure planet's orbit plane, thusfining up along th_ /gin.=.di_,'peter across the ecliptic. The requiring a I:sser departure energy (Fig. 6). The opposite mat-WsSghtesttarget planet orbital inclination causes a deviation egy (i.e.. a transfer in the arrival planet's orbit plane) may be

preferredif arrival energy, V. 2. is to be minimized (Fig. 7).

= TRUE TRANSFERANGLE It shouldbe noted that nodaltransfers,beingassociate,

_' _1 = TRANSFERANGLE with a specificJupiterarrivaldate,may showup in the dataonPOLAR IN ECLIPTICPLANE severalconsecutiveJovian missionopportunity graphs(e.g.,TRANSFER 1991-1994/5), at points correspondingto theparticularnodal

PLANET arrival date. Their mission space position moves, from oppor-/__ / ORBIT tunity to opportunity, alongthe lR0-degtransfer ridge, by

// _/_ / / 1_ _ TARGET departure dateg Only one of these opportunities would occur/ _ / | \ PLANET at or near the minimum departure energy or the minimum

/ /- _[ / ]/// _ \ POSITIONS arrival V date. which require a near-perihelion to near-

Y __1 180_ _ f(q/l) aphelion transfer trajectory. These pseudo-Hohmann nodalSUN = transfer opportunities provide significant energy advantages.

ECLIPTIC but represent singularities, i.e.. single-lime-point missions.

with extremely high error sensitivities. Present-day missionplanning does not allow single fixed-time departure strategies:however, future operations modes, e.g.. space station "'on-

EARTH t_i time" launch, or alternately Earth gravity assist (repeated)encounter at a specific time, may allow the advantages of anodal transfer to be utilized in full.

Fig.5. Effectof transferangleuponinclinationof

trajectory are The 180.deg transfer ridge subdivides the mission spaceinto two basic regions: the Type I trajectory space below the

PLANETORBIT ridge, exhibiting less th:,n 180-deg transfer arcs, and thePLANETRANSFER Type I! spacewhose transfersare longer than 180 deg. in

V_2 MIN.) generalthe first type alsoprovidesshortertrip times.PLANET ATNODE _ -"_% Trajectoriesof both types are further subdividedin twoAT ARRIVAL _.________--_ _ "_ parts-Classes 1 and 2. These are separated, generally hori-if -)'_ INTERMEDIATE zontaHy, by a boundary representingthe locus of lowest

_" ..__,, _TRANSFER C3 ener_' f°r each departuredate"Classesseparatei°ngerduration missions from shorter ones within each type. Type l,

_.. Class I missions could thus be preferred because of their_UN _ / / I ECLIPTIC shortertrip times.

"_ \ /// / TRANSFER

_ (MIN. C3L) Transfer energiesbecomeextremely high for very shorttrip times, infinite if launchdate equalsarrival date, andofEARTH AT NODE course,meaninglessfor negativetrip times.AT DEPARTURE

The reasonthat high-inclinationtransfers,as found alongFig.6. Nodaltransfergeometry the ridge, also require such high energy expenditures at depar-

J

.M

1983010504-015

OR!GlflAL P_G_ IS...... , q; Lrw

EARTH- JUPITER1987,('31,,TFLBALLISTICTRANSFERTRAJECTORY

92/10/0S ,, i I I//.''/:/I//IV lOO , 48900.592/06127 '. , J j /_ ;,'/ I :110 ' 4_B00.§

92/03119 _ ! : :,'/ : ," .... " 48700.5

_ /, ., / i! z,J_V ,"' I/,_ll_ ._ ,so 488oo.s

" 91/12/10 ; i i _ --" --" / _"' ;'_/ " _'_l/_ _. 14o.." 140.

,,,o,,,,.,,,,o,,,,o,,,:,,,,/ "j";" ,,. '" ia .ij- /, "l/ A ._,OO ;i /i" I

,_ 90107/28 /'/ IJ P"" _ v II Jv_"' " v " "f / X/ " !/ I// I) l,t'/ J// ,_",.:i._oo,' t ,_/yl 4BlOO.B

. . .J

>- _47I/'i' vz,. ,__e_/,.,,,vvJ,,,,,o4,,,// ,, , e/,'. ,_J,_ii/,,,,_/I,, .,,,,o,_

_ //,_ _ ;h_ NODALTRAN,,E[RX_/,).m, iv.

"L_s. i i,//i, iV-iT, 47_.B

"/01/_ _ 'r / " I : [.''87 _._ I_tlO." _'J ' IT " _/J[/

89110101 / '1 [ [ _;,I0 ,,_i'_ /::_ ,r l /y/_ .['" 47800.5"-4 - ,47700.5

_/owz_7, . .. ,o.."_ _T::'t _, _",/_i_r'! \_i'-._ / I �I/IV I /89/03/15 B _7_i5- " "--'_ / / j//I ", ..,., ....

I88/08/27 " %' '_ _ A /: : • 4?400.5

88/05119I I I =1""1",_,_1 "_ I I r c_ • 47300.5

LAUNCHDATE

469_).5 4C_.5 47000.5 47040.5LAUNCHJD--2400000,0

Fig. 7, Mission spacewith nodal transfer

lure is that the spacecraft velocity vector due to the Earth's

ecliptic in addition to the need to acquire the required transfer C31VOI_AL = V_: _ ap - 1 _ 77 km2/s _trajectory energy. The value of C 3 on the ridge is large but (8)finite: its saddle poinl minimum value occurs for a pseudo-

Hohmann (i.e.. perihelion to aphelion) polar transfer, requiring This is the lowest value of C3 required to fly from Earth toJupiter, assuming circular planetary orbils,

( 201' + I) _ 2400km2/s 2 17}C3 = I'_. _,I+% Arrival l-infinity. V.¢, is at its lowest when the transfertrajectory is near-coplanar and tangential to the target planel

where l"F = 2*).7hb kin/s, the Earth's heliocentric orbital orhit al arrival.

veltlcily, and % = 5.2 AU. Jupiler's (the arrival planet's) semi.maJou axis B) a smlilal est]male, il can he ,q_(iwn Ihal l'_ra Both C3 and V®a near the ridge can be significantly Iow-IIUe n_ldal pseudo-tlohmanrt llansfel, the ram:mum enetg._ ered if deep-space deterministic maneuvers are introduced into

_e,.. , "d would reduce to the mission. The "'broken.plane'" maneuvers are a category of

7

i

II

1983010504-016

ORIGINALPAGEISOF pOORQL:AL-rTY

such ridge-counteracting measures, which can nearly eliminate POLARall vestiges ot the near-180-degtransferdifficulties. TRANSFER

The basic principle employed in broken-plane transfersis toavoid high ecliptic inclinations of the trajectory by performinga nlane change maneuver in the general vicinity of the halfwaypoint, such that it would correct the spacecraft's aim towardthe targetplanet's out-of-ecliptic position (Fig. 8).

Graphical data can be presented for this type of mission,but it requires an optimization of the sum of critical AVexpenditures. The decision on which AVs should be included

must be based on some knowledge of overall stagingand arrivalintentions, e.g., departure injection and arrivalorbit insertion ECLIPTII

vehicle capabilities and geometric constraints or objectives OPTIMALcontemplated. As an illustration, a sketch of resulting contours EARTH BROKEN-PLANEof C3 is shown in Fig. 9 for a typical broken-plane oppor- TRANSFERtunity represented as a narrow strip covering the ridge area

(Class2 of Type I and Class1 of Type 11)on anominal 1985 Fig.8. Broken-planetransfergeometry

EARTH - JUPITER 1988, C3].. TFLBALLISTIC TRANSFER TRAJECTORY

90/07128. _ 8 _ _R g o "48100.5

90/04119 , ' 480(X).5

90/01/09 , ' 47900.5

89110/01 ' 47800.5

89106/23 ' 47700.5

89/03115 476Q0.5

88112/05 47500.5 o.

r__ 88/08127 47400.5

88105119, 47300.5

88102/09' 47200.5< E

87/11/01' 47100.5 _

87/07124. 47Q00.8

-,8710411S' 4(6_.5

87/01105' 46800.5

86/09/27. 46700.8

88108119, 46600.5

86/03111 48500.5

iii!iiii,liLAUNCH DATE

46115.5 46155.5 46195.5 48235.5LAUNCH JD 2400000.0

Fig. 9. Mission space with broken-plane transfer, effective energy re(i drements

Jk |

1983010504-017

Ih-.ll

oF POORQ,,u.JTY

launch/arrivaldate C3 contourplot. Thedeep-spacemaneuver magnitudeC3 = IV,,.I2, called out as C3L in the plots andAgap is transformedinto a C3 equivalentby convertingthe representingtwice the kineticenergy(perkilogramof injectednew broken.planeC3ap to an injectionvelocity at parking mass)which must be matchedby launchvehiclecapabilities,orbitaltitude,addingAFap, andconvertingthesumto anew andthe V-infinitydirectionwith respectto the inertialEarthandslightlylargerC3 valueat eachpointon thestrip. MeanEquatorand equinox of 1950.0 (EMESO)coordinate

' system: the declination(i.e., latitude)of the outgoingasymp-C. Launch/Injection Geometry tote 6= (calledDLA),andits rightascension(i.e., equatorial

east longitudefromvernalequinox, T) o, (or RLA).TheseThe primaryproblemin departuretrajectorydesignis tothreequantitiesarecontour-plottedin the handbookdatapre-matchthe mission-requiredoutgoingV-infinityvector.V=, to

the specifiedlaunchsite locationon the rotatingEarth.The sentedin this volume.

site is defined by its geocentriclatitude,¢!."andgeographic !. launch _zimuff=problem.The first requirementto beeastlongitude,XL (Figs. 10and 11). met by the trajectoryanalystis to establishthe orientationof

the ascenttrajectoryplane(Ref. 7). In its simplestformthisRange safety considerationsprohibitoverflightof popu-latedor coastalareasby theascendinglaunchvehicle.Foreach plane must contain the outgoing V-infinity (DLA, RLA)launchsite (e.g.. KennedySpaceCenter,WesternTest Range. vector, the center of Earth, and the launch site at lift-offor GuianaSpaceCenter),a sectorof allowedazimuthfiring (Fig.10).Astile launchsitepartakesinthesiderealrotationof

directions ZI is defined (measured in the site's local horizontal the Earth, tile continuously changing ascent plane manifestsplane, clockwise from north). For each launch vehicle, the itself in a monotonic increase of the launch azimuth, Y'L. withallowed sector may be further constrained by other safety lift-off time, tt, (or its angular counterpart,a. - _/, measured

in the equator plane):considerations, such as spent stage impact locations down the

range and/or down-range significant event tracking capabilities.

cos91.X tan6 - sin0L X cos(% - %)TheoutgoingV-infinityvectorisa slowlyvaryingfunction cotan_. = (%- aL)

of departureandarrivaldateandmay be consideredconstantfor a givenday of launch. It is usuallyspecifiedby itsenergy (9)

ASYMPTOTE

N MERIDIAN

LAUNCH FLIGHTMERIDIAN PATH

LI V=.DEPARTURE

ASYMPTOTE

INJECTION

::- LAUNt

a=0

VERNALEQUINOX EQUATOR

TRAJECTORYPLANE

Fig. 10. Launch/injection trajectory plana geometry

=:

1983010504-018

ORIGII_L pAGCISOF pOORQuAt.rI'V

I'he d;,d._ lime h1.,4¢_=._of :=/imuth ca,=be _lbt;iltt@df, onl I{q. GREENWICH

(L)) for a given ¢_. b.. departur@asytnpte_tedhr'cliotl by CUlt. MERIDIANS,=

lull._ l_,llt,_ltll_ quad,a,it lilies @\plaIned h@h,w;t,td II.,,Ingthe Oh GUT A GREENVVICH HOUR ANGLEI'ollo_lng auxdlaiy expte.'_SlOlt.,,Ise@Fit I II EAST LONGITUDE OF'_ (GHA)

V L

__ _-I!.'_/__ ¢_ _ / EQUINOX';H"',,-I,'! --- |0007"_'_42"('l 47"_4"tlX'/._uLAUNCHSITE_ ;'/'7 u_-ul;41' Jol

, _',,0|sx 10'-' \ a_,, _||_ / "-..J_t. J DEPARTURE

ANGLE TRAVERSED '_ ASYMPTOTEwhet@ BY LAUNCH SITE _ MERIDIAN

SINCE Oh GMT \¢11 = light a_'@nsionof launch sit@tq i , XI ) at I ! OF LAUNCH DATE LAUNCH SITE

(d@gl AT LAUNCH. tl. (GMT)

(;ll"ll, trt" = (;te@tlwich hour angl@;it Gl' I.;MT of the

laullch Jate. the @;tstw:ud angk" belw@en Fig. 11. Earth equator plane definition of anglesinvolvedV@fl1:ll t.'Lilltll¢'J.X -'/lid th@ (;Ie=..'llwit,'h nlet ldtilll in the launch problem

I,Jegl

,l_lI "= l:lUtlIh dal@ Ill letlllS _'d Jill@get _.|;I._ ,_IllIe live) ;in_.l .lO0.t'_deg ill the l'outlh _.IU-'=dt:llll(w|letl ¢Olall _-"0 h ]Jll. I. l_I_O (dJ_.,4 i._llegalP,'@'l.

'"/ .iI,'/', Sl,.l@lealrotation l;lll." Ill" I:alth ( 15.tlSItll_t_LIA gene_ah/e-I ph+t el r@lativ@laullch tillle lRi I" X'_l:;ullchd¢._h Iol Ihe Iq,_'k-_tlll _' tall pcth_dl

:l/inluth _I Call be CLtll$11ll,,.'ICdba.,_'d¢',n l"qs. lit);llld (12l,

I I hll olI Imle lh. (;'_I I I If ;I fi_,ed launch ill@ l,tlilUJe IS :iJopled (@.g.._'*'I : "S.3 degl_tl K@ntl@J._,',;pac_."l:h_ht ('ent@i ,,I l,';ipe Canavet;=l.l:h,itd:=l.

:'L lelali_,'¢ l;Ulllch liul@, Ii, I I" m@;i._litedv,'ilh _espe¢l to :in _tlih ,t IdOt is l'qe.,¢enl@dIii Fig. 12 v,ilh depaltut@ ,4_)llll'qL_lelll¢lllJl leh.'l¢ll,:e |lhe dip,lilt:re ,is_llli'_l_tle lll¢lldt,lll',, tlglil de¢lillahon _., ;is lhe IL'qllC*lll |'_,.llillllelel. rhe plot i.,,;ll'_Ph¢:d_le

,is_..t.ll_l_.._ll_.t J, ¢-'III|'_@d@l'illedill to ;II|._' l@ah_li¢ depallUle coildllhtu, l[lJepeudeIll of _i....d;lle.

_l lille I.muih time zz (Rel SI.

_ko. tl I

zrl _ "4 0- . h t 121 ..• llaih', launch window:: IilSl'_¢'clp,_n,,H l:ll'. 12 llldt¢-'iles_'L_llh'lll lh,ll ge,letall._ two ¢i_IIIL_III$I."_I_I I'_I ca¢h de<hl_,lllL_ll v,lhle

{e.g.. _.,. : -I0 degl, _'qle_._c,.'Illllll!; Jl I/i.I I" duilni', lh@,i tit.[hls little tel_teseltt.,, J ._@net;lh,'eJSld@t@,IIlittle l_l" l,rtl,ch |louis. tile ¢_thet in tlte p.tll. ItOtlt_ ,,_I" the aS._lIlphqe Ieliltt,'e

,.'l,Ip,,eJ.,,ale lhe l::I,n¢h ,th: I,i.,,Ip.'i.,,._eJlhe d@patlule ;l.,kvnIp- "'d,I._.'"lole ittel Idl,lll. _A,

Sln,.'e hll-oll lllti¢.., .it@bImtid@d h_ pte._eie¢l@dl,luiIih .,,it@

l'he ,litllal t;leCll_,tiih ._le,lti little IIi.MI'I _t launch, _I" d@pcttdent htlttltllg _,alue.',el launch ,i/Illtuth _'I to'g, "tl _,lel_tli.l_, l,e _d'q.Uth,'dllttll111_I r i'*t' ,Iddlttg .I dale, ,,II¢. ,llh.l ,Is',hll'_- .llld I I._ [email protected],k'h of lh@ lwo _,|e¢lltt;lll_,_ll_OlIIliiIi_ lhu.,i¢Olt-

tole.depettdetll .hllIt,,Inleltl l,tttI.,, ,i .,_'I:.HI_'IlldUllllg whI¢h l,,lllllIh l.,,il_'ttltis._tble "',I lauIlch

v,,'lll_.lo_," rh¢ i_o ,,L,glllt'lll,i _,tll lhe idol do dt,lill@ lh@ 15_,t

_ l,ll.l_, if., ,_ II 151"I ,it.ttl,ible d,ltl_ l-'um¢l, wtnd_,',_.,.

_¢_1 I&'lll %S t',itt lit." ',,_,'etI lib, sill | Ig I. '_. h_t ,_ (|, the t_¢_ d,uh,

the e,g_t¢._,,,,tnl,,t _z II 'I ,It ttttlSt I'_," It.',ed v, tth iL_tttl'_ll|,l [,lUl1¢h _'=l'_l'_OttlllIlll@_ Jte .,,@pat.lied b_ eS,l¢ll._ I_ hltut_, _,l=ll|l

lh_tl.II te._'.,tt,l hq _llladt,lUl.,,.._llt_ll|,It I'_,_llll._, ,llld •Iglt ¢_,_II',elI- ,III lll¢le,l.,ilng ,_ I lh@_ ¢lo._e lit _,ql each olhet, II11111 ,=I I_ I

Item,, II the l.mn,'h I, kn,,;_n to b¢ dtte¢l Ire, _',,.,,tv,.itdl. ,01 . tlte_ metg@lille .I .•tngl@d,ul._ Ol'_l'*Ollllnll_ l:Ol I,_,.,I

thell •_I, _,_Iteli _,'_'=t,'.lI _I t_ tte,_,itt',e. 1,111_.II'_¢O,_lle,:led !_ _,*_I. ,l "'._phl".el thal Sltlgle launch _t, tth.|Ltt,_ _._,'*.'lll%.dt.',al|o_._,

•-I •-: _I ,. * I_1111 | _'=l lelt_'_t.lde, lt_e,,,t_,_,.ltd| LltlU¢lh,'.'.,. Itt_, ,III @vetIIIIIC,I._IIII_ tleIh,'_t_I ,I/IitlUlh t-,ht@.,,l'hL,,._eittst ISI,',ill t) ,le._'mtt,,t I,,' added in the Ihttd I_,_,llettcol,ill _ Is |ttt,,i _. tlltlleltl¢ J|'=OlllP,l._l.lth] IIs Iltltlt_ ,,',inI'll, ' t.let_'ttlttne_.lIttttll

10

k

1983010504-019

11

1983010504-020

: . tmBmNAL PAGE

OF POORI_'JALITY

180 sin (a - a_) X cos 6

sino --...... =.zL 08)160

"_-e extent of range angle 0 can be anywhere between

m 140 0 deg end 360 deg, so both cos # and sin 0 may be desiredinO

its determination. The range angle e is related to the equa-

r_ 120 torial plane angle, _ = a. - eL, discussedbefore. Even:z: though the two angles are measured in different planes, they

_" 100 both represent the angulardistance between launch and depar-3ture asymptote, and hence they traverse the same number of

N 80 quadrants.<.1-uz 80 Figure 15 represents a generally applicable plot of central

3 range angle 0 vs the departure asymptote declination and<-J 40 launch azimuth, computed using Eqs. (17) and (18) and a

launch site latitude @z. = 28.3 (Cape Canaveral). The twin20 daily launch opportunities are again evident, showing the

significant difference in available range angle when following a0 vertical, constant 6.. line.-90-70 -50-30-10 10 30 50 70 90

ASYMPTOTE DECLINATION 620, deg It is sometimes convenient to reverse the computational

Fill. 13. Permissible regiom of azir,_uth vs asymptote procedure and determine launch azimuth from known rangedeclination launch spacefor Cape Canaveral angle O and tRLT, i.e., ACe: a - =Z,,as follows:

: ASYMPTOTE RELATIVE LAUNCH TIME tRL T, h., BY DEFINITION

2, , =0"=24hATo 3 6 9 12 15 15 21 '.RLTI_ I I

-40 lY-£o I AZIMuTHLAU_JCHmmmmaml I = V=0- MERIDIAN

-30 _ - _'Lc / OF LAUNCH SITE

i / AT _L = 28"30

• -20-1STWINDOW/ / -_OPENS AT / / _ 2ND WINDOW

= 70° / 1ST WINDOW "_ OPENS AT

-10 / CLOSESAT i ( _'LO = 700

/EASTERLY T"Lc= 110° I.3 0 LAUNCH I I :g2.

1"11 _r = 900 _ SUN '< ,ASSUMED V=0,10 (ASSUMED) ASYMPTOTE

OI-- 68o= - 15° o LOCATION:< 620= _15°:3 2(w _ = 315°

3O

40 a=0 - aL 1 = 285°

-45 0 45 90 135 180 225 270 315

RIGHT ASCENSION a. deg(EARTH EQUATORIAL CELESrlAL LONGITUDE)

Fig. 14. Typioal launch geometry example in celeqtial (inertial) Mercator coordinates

I;!

1983010504-021

OF POOil Q'..'_LITY

400

360

=o "

.0 (/ ,=oie J,'-P'-.i___i\ _L-,oOI',,,._ (]/p, "- ,.,.,oolI,,oJ,.,,.,o,,°,,z,,o,,,oo '_ I I i I ,.,.=,,u_/_o,,o,.,-,v,_,_-o,

Ie0 .r tl \?',_"_%'_,_i / h "6°° I

z ,o _'-_L",k"F,..]'-_"-4_ _

4o ,0 Ti.illil iillJlli, IlllJllll IIIIJilli ItliJlttt liliJliil iillJllil IIlllllll illlJllll IIIIhltl Ililhitl IliiJllil IlilJllil-70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80

DEPARTUREASYMPTOTE DECLINATION 6., deg

Fig.15. Centralrangeangle0 betweenlaunchsiteandoutgoingasymptotedirectionvsitsdeclinationandlaunchazimuth.Pairof typicalexamplelaunchwindowsfor 5_ = - 10deg areshownby boldlinesegments

(reproducedfromRef. 7}.

cos6. X sin(a.. - _L) with the lightingconditionsat lift-off andconsequentlyallowssinYL = sinO (19) alighting profile analysisalongthe entire ascentarc.

The anAleZALS, displayedhi Fig. 16, is defined astheanglebetween the departure V vector and the Sun-to-Earth

sin 6 - cos 0 X sin tn. direction vector It allows some jud_ent on available ascentcosEL = sinOX costz. (20) lighting.

Figure16 displaysa 3-dimensionalspatialviewof the same The length of die rangeanglerequiredexhibitsa complextypical launchgeometry exampleshown previouslyin map behavior-the first launchwindowof the examplein Fip. 14format in Fig. 14. The difference in available range ingles as and 16 offers a longer ranse angle than the second, but thewell as orientation of the trajectory planes for the two daily second launch window opens up with a rangeangle so shortlaunch opportunities clearly stands out. In addition, the f'q_urc that direct ascent into orbit is barely possible. Furtherlaunchillustrates the relationship between the "tint" and "second delay shortens the range even further, forcing the acceptancedaily" launch windows, defined in asymptote-relative time, of a very Ions coast (one full additional revolution in parking

I_n.r, as contrasted with "'nlorning'"or "'night" l:.unches, orbit) before transplanctary departure injection. A detaileddefined in launch-site-local solar time. The latter is associated analysis of requiredarc lengths for the various sub-arcsof the

1$

li

1983010504-022

ORIGINALPAGE ;SOF POOR QUALITY

RI IN

CLOsEsWINDOW_I_" ! I0L) _ (ASSUMED)INJECTIONCIRCLE

FIRST "DAILY" (tR! T)SECOND "'DAI OPENS , LAUNCH WINDOW "-

(NOON LAUNCHI(_.j,) LAUNCH

DOW(EVENINGLAUNCH) WINDOW

_-"1. lO°

EARTH LAUNCH SITE

LOCUS, 01. CONST.

SECONDDEPARTURE

ZALS '_ ,"SUN TO EARTHVECTOR

FIRSTDEPARTURE OUTGOING

ASYMPTOTE

V,.,

DEPARTUREFRAJECTORYENVELOPE

F,g. 16 Typical examph. ¢1fda,ly launch gt'_llte'tl¥ (3 dlmt,n_,t)nal) ,ISvlt'wt,d by a,I tlutsi¢|t,L)tsst,fvt,f ah=,ad¢1tthe,spacecraft

t4

I

1983010504-023

OF POOR qUALII"V

_11 titll'lNINU .XFIt" Ot tl_O._l 1 tl % I ttl_'t I ._ IN I_1 t'.XIIK.INU Ollt;i I

/1 • IILIIININ_ -_tii" _,'*t t IN-_i $1 "_,_t I tll(tl._|

{I Ii'_,N_.,I .M_IUli tit I_,%IIN L.XLIhI_'ii._II! .XI_ILILIII'.XIiIUIII ii.%L_I'XI .X._MI'IOII

I:.. "_NUL! tit I_,%l11%1t'1 )(It_l I -XNi_ L_II"_tIIL:Fil tl*_ltl._l ._._Ii'!OIt

l', lilLIt -_IN_'*._I-XI_ Or IIN.II_.'Ih,_N

t I_1 I I I_lsl¢ _llltliltf_ Ill thlt liuli_'h likl isl,'lllll pltsflhp lit the tlil_'llll_ ldane liilel H_f Ill

,I,'l..i :.1;," "!.11,', :,,_.% "_, |l',:l_ .| ::.11,', _,';% , ,'" ._' ,'It,": ,". |'.1:.1 '. i','tl,l|",¢ :.l,llll*,. I%i'l,.llh _,"{, ; _,:'" !,," .1 k,,tl.,".tl.l:I_.!,l,lll _. I'.?ll',':',,Itt, ," II ti_ | '_ tt11_,',ll_':i *.I,'*.: _. .I I, %% k_.: _. _ II_ll _ I1:_._,_ ) _'.l;_|tl._ ,"!'t|

• ", i.t#. _.t.l%tl.lth,t_..l! i,.i..U_.tt't, "_, ,,_, I .Ill!' I ,'l,'l I,' th,"

I RJIIIII¢ ,llllll¢ .lielhlis_'ll¢ | ,,' .t _t.lt,l," .l,,,'_'t "i.ll,',l,,t% I J_,'[_,",'| L ,'ll'_l.ll,l_.%,', tl,'ll _k )

_!_",t._.tl t.tl,," :.11'¢.," .ttlt:t_" -I '.'l,l',t Itt',! ,'._ .i t. .I,,,*ltltll,t*.l.it,," q't_"

|%l. ttl I_tltt_..t;,'_ ::t .it1,.! "l, ._.'i';.",_'tt|tttt .l%_l|l t'tU _ _'.liktt'_ lit,- t_lo|_l't 4_l_lltl_lt _l th¢,_¢ ItJ5",|,,l'* ".it|, .l:,', 41_,,,t tl%ittl|l,'_.

,,;|ll_, .ltt,[ ;:,l".','..'t.itt_'t.ll% ttti_',tt,'t" !'Li'' _, tilt,' Ill,' ,I,'_.lttUt," .l_]ltl,,',"h'lt| I.,'t th,S_|t,'tt ,'l't.il tlll,',;t,'lt li," I,'t ;|re l|l_ht

.. .1:'_,' ,,'t't.ll; t . }'Jilt .In.l-'l¢ • It ) ,'_i,,',t.ilh %tl'tttlt,.lltll ,'l _, ,!it,',| .1'I_,'111

.i't%"11_%"," ,1','¢, ;._'I! II Ii: I%1• . .1_.11.%,.._ .I I_ .i_ _'-_.lh;li",l ll,'t.c.hl :.lit,,, iI;i,',ll,'_ll _.11_.'_,'*, |_'," i • ,_.... l,

i'hdi¢,l ,i', !,ql,,_a •

I ' - I _.'1_

i,,i,,,,l," %%h,"',,"

1983010504-024

• ORIC41NAL PAG._ ;:;OF pOOR QUALITY

140 NOTE:2 ' I

C3" V_ODEP ISTWICLk-uu _ THETOTALENERGY

PERUNITMASS130 1

U_ _

_ 120 ,ERIGEE-- A TIT O185km (100 nmi)

uu 110_" 370 km (200

IO0 I I I I i I I I -25 50 75 lOo 125 150 175 200 225

C3 , km3/s2

Fig.18. Anglefromperigeeto departureasymptote

vt = is the true anomaly of the injection point, usually leant role in the ascent orbit .selection. A limit on maximumis near 0 deg, and can be coraputed by iteration coast ducation allowed (fuel m,il-off, battery life, guidanceusing: gyro drift, etc.I may also influence the long/short parkin_orbit

decision. In principle, any numt)erof additional parking ort_,teli sin v! rewdutions is permissible. Shuttle launches of interplanetary

tan _s - ! +eH c.s vI (23) missions (e.g., Galileo) are in fact required to use such addi-tional orbits for cargo bay door opening and payload deploy-

"/I = injection flight path angle _.bove local borizontrd, ment sequences, in such cases, however, the precessionaldeg effects of Earth's oblateness upon the parkingorbit, primarily

the regressionof the orhital plane, must be considered.eH = eccentricity of the departurehyperbola:

4. Parking orbit regression. The average regression of theC'_Xr

P nodes (i.e., the points of spacecraft passagethroug.hthet_i = i+_ (24)P_.. equator plane) of a typical direct (prograde) circular parking

orbit of 28.3-deg inclination with the Farth's equator, due toTo make Eq. (22) balance, the parking orbit coast arc, Earth's oblateness, am.unts to about 0.46 deg of westward

#¢O.aSr, must pick tip any slack remaining, as shown in nodal motion per revolution and can be approximately corn-Fig, 17. A negative Oco.4sT implies that the vL-SOlution was puled fromtoo short-ranged. A direct ascent with positive injection true

anomaly eI (s.e.. upward el,robingll,ght path angle, 1'1. at 540" X r2 X J, X cosiinjection) with attendant sizable gravity losses, may be accept- S'l = deg/revolutLon (25)able, or even desirable (within limitsl for such missions, r,2,

Alternately, the other solution for _t., exhibiting the longer whererange angle O. and thu_ a longer parking olblt _oa_t. Oc.o.tsT,

should be mlpletnented An extra ,ew,lutnon m parking orbit • = l-arth equatorial surface radms,b378 kmma._ he -, viable alternatwe. Other ¢onsndcratk,,s, suclt as s

desire l'.r a lightsnde launch and/on uqectn.n, tracking sl:lp r° = circular orbrt radius, t.vph.ally 6748 km f-r ank_:ation and booster impact constraints, may all play a _lgmt- orbital altitude of .170 km( 200 nmt)

Iii

-1

1983010504-025

"/2 - 0.00108263 fin Eardl 6. Tracking and orientation. As .t.......... c,from the Earth along the asymptote, it is seen at a nearly

_ i = parking orbit inclinatioh, dc t _ "cor, zputed for zonstant declination that (,f the depart,_tc asymptote. &.

, a given launch geometry ft. ,., (DLA in the plotted data). The vah'e of Di A greatly affectstracking coverage by stations lu,:ated at various latitudes,

" _::": ' " " , """ 'L (26) highest daily spacecraftelevations, and thus best reception, areenjoyed by stations whose lahtude is closes_ to DLA. Orbit

determination, using radio doppler data. is adversely affected]'his .:u:rectl,'_.,1.:r,,t_tiph,..' , .,_" orbital stay time of N

rew)luth:ns, mu:'.tb,: c,,n.4d. ,, .' _,_de;ermining a biased launch by DLA's near zero degrees.

time and. hence, the rtg_,, a_'en.qon of the launch site at The spacecraft orientation in :he first few weeks is often

lift-off: determined by a compromise between communication 1antenna

lx)inting) and solar healing constraints. The Sun-spacecraft-

QL_.FI." t,L + _"L× ,V deg (27) Earth (SPE) angle, defined as the angle between the outgoingY-infinity vector mid the Sun-to-Earth direction, is veryuseful and is presented in the plots under the acronym ZALS.

5. Dogleg ascent. Planar ascent has been considered exclu- It was defined in the discussion of Fig. 16. This quantity hassively, thus far. Reasons for perfi)rming a gradual powered many uses:plane change maneuver during ascent may be many. Inability

to launch in a required azimuth direction because of launch (I) If the spacecraft is Sun-oriented, ZALS equals tl,eEarth cone angle (CA), depicted in Fig. IO (the conesite constraints is the prime reason for desiring a dogleg ascent

profile. Other reasons may have to do with burn strategies

or intercept of an existing orbiter by the ascending spacecraft,

especially it its inclination is less than the latitude of the

launcl', site. Doglegs are usually accomphshed by a sequence of PLANET

out-of-plane yaw tums during first- and second-stage burn, (SUNI

,.)ptimiz.ed to minindze performance loss and continent" rg as

soon as possible after the earl), low-altitude, high aerodynanuc

pre_ure phase of flight ts completed, or alter the necessarylateral range angle :)ffset has been achieved.

r .-.

B) contrast, powered nlane change maneuv--ts _)ut of

parking orbit or during 'ransplanetary injection are much le_s

efficient, a_ a much higher velocity vector mu_t now be rotatedthrough the same angle, but they may on occasion be opera- CONEtitmally preferable. ANGLE

As already discussed, a ,,peclal geometric _ttuation developswhenever the departure as_tnptote dechnattt)n magnitude

exceeds the latitude of the launch site. causing a "'split azi-muth'" dady launch window Figure 13 _.ws the effects of

as)mptote dechnatlon and range salet], constraints upon the

launch problem As the ab_dute value o! dechnati.n increases.

it eventually reaches the safety constraint on a/mtuth, prevent-mg an_ further planar launches The _ttu,,,tm _,ccurs mostl_ CLOCK

earl) and or late m the mission's departure launch period, arid TO ANGLE

is trequentl) associated with dual launches, when m-nth.long OBJECTdeparture periods are desired

STAR

The Shuttle-era Space Transportatmn System (STS), mclud- {CANOPUS)

ing contemplated upper stages, ts capable tit"executing dogleg

,,peratlons as _ell. Tiiew _,,uld. h,,_ever, ellectivel._ reduce

the launch vehicle's pa._l_,ad lot ('.tl capablht_, as the._ did-nexpendable la,mch velucl¢__l the pa_t. Fig. 19. Definition of cone and clock angle

I?

1983010504-026

ORI¢,IN PAliEISOFPOORQUALITY

'm,,h,.. 0+1 0,,......,d,p.,.I _,. ! '.p'a,.',?0:"!lt-I!x:'d ,:,','!:!!!!.'!:'. Annti,-'_,i,,,l_,,.......... |.-.,." Iq.%tl,..... , et,,,t_........................([/,,.,!. Ill _',,i,,t_ t ............ t"

J. augk" I+¢t_Celt tile _t'l,ld¢'`. hmgmldnlal--Z.lXl_..lld tile techniques available, sucll as F'lssive wait for .a!ural

tile" _,bJccl dnlcgtntm), aliglllncnt of Lh¢ ct+ntinuotlsly regre,;si,+,,.,pace station orbit

(2) The St,n-pla._ angle. 4,_ (pba._ an_le is the Sun-object- plane (dmen hy I'arth's oblaten,:_s} with the required, " :'-infinit.,, vector. ,_r tile utnlizalton of 2- anti 3- impulse man-

spacecraft atlglel describes tile state ,*f the ,bject'seuvers, seeking to perlorm spacecraft plane changes near the

disk lighting: a fully lit disk is at ,'ere phase, l:or the .tp.gee .,f .t ph.lsl!lg t,rbli wh.:re vdt,.,ly is Iowe.,,t and thus

l-arth land Moon}. several days ;,l'ter launch, the su,i- Itlml_;.tt the ,,rb_t .`. e.lsle`.t. llleSe t_,, :lppr,,:lcbe`. Call I)epha._ angle is: c_mlbl.ed _.+,itlleach other. :.s well ;ix _,l'h other .,.t.lt;ibl¢

lllallellver`.. `.lldl :l`..

,I, s Ill) - /AI S I'Sl

(11 Ih.'ep ,,p-'lce plopnl.,,Ive burul._ t}at orb:t xhapll|g ;ilia

(3) rhe etvlltour labeled ZALS = '+)0" separates two tale- ph.l`.mg..,'orles of tldll`.ler tlale_2toilex tlm`.c call) dcpaltll!¢,,

{"1 (Ira%'ll.} ,Iv, lst !1_ b). inchldlf|g l-arth ret:lxxl AVI'GA,tllat Itr`.t cut tllslde ]".,.ll,b'`. Olblt. thu., slatting out all

Ilegall%e Ilelmcentfic true atmtnalle, t_t /.ALS _-_l'.) 131 :x.etod.,.ut,,.'_lc IUllI',. at gl,l/lllg perugees el at inter-

atld tht.'.',e late, lille, thdt "_ldl t at psj`.ltlve It Be allt, llila- llledl;Ite pLlltetary `.- Itlgb)._. ;Itld

h¢.s. ]leadlll_ I,Ill l:l_,.lld j Rpllel .llld lle',g'l e_,p¢l ielh. Illg

file IIl¢led.ned :,elan _leallllg al dl',l,llh.es _,I l¢-,n lhall |4| .Mtllllple re_,t,lulion IIIle_.:ltlll burn.% fe_.llllllllg .s¢%'eriil

: AI f.[ ZAI_S "..'it}' I,,_. gl.s+,nngp.l._Scs,c,.nblned v+lib apogee pla.¢ cba.geI|l,iilell% ...'r`.. etc.

7. Post-laun_.'b ,_paet%.'rJft st:lIe. Alter the spa_'e_.la|t h,ls

dep'lrled |'loll! I[1¢ Illlllledl.ll¢ %1_1111t) el I'.lllh II.e.. ]elt lilt" All -I these dextt-¢s can be opllllll/ed Io pemul ..ialtsf,,ctory

I ,llth'_. ,phe!e ,,I IIl!!,lenc¢ ,_t .Ib,,ul 1-2 I!nlh,,! kIll|. It I!hl%e..,, ,,rlnt,d lallllebe`.. ,is well ,is t,, ,Ichleve the lIb,st desirable cold!-

oil a hch,+_.'ei+tric Ct,tlk' whose Illttl.li ,.'tmdlt_oits ,ll.l% I'}e lioins at the lilial alttval i'_od_, ill general, space |atlltcll advan-

apptt_%llt:.lted ,is t,lge's. `.llch a`. llll-tlll_lt .l`.sellll'_l% alld che_.kotlt nil" payh_adsarid

clil`.,ered Illlllllt_le |'_tl,pllIMIIII "_|.lges. t)f olbl|al coII.MILIcII'+III ll|

Ib'.%l" VI IRIII t V.. I-'_11 bulk_ .lInd l'.n:,lh.' `.ub,,_.,delns (',,,Lll l'Lllid`.. ,,all.,,. d.lliellnd.,s.

ladt.tlol,,. I,i,l,ll!s. '+,c.i _a,tll. it Is Imped. gle;i;I._ _,llt_,_etgh the

I_,'l RI tl,'lll 4, Ii,'. t • .._' | ll..|l M_lllll_,illt d_.''+'p-_|,,ice Itll',,,l_ll p,,',,,lltle,, IIIClll(ed tlt.'c,ill._ ,)|tile" ',p,lO,." M,III_Hi"_ Iltitel¢llt iqbitJI o11_.'ltt-ltlon IIiCOlltpatlbl]lt._

_A,itll d'+'p,lt lute l'+'qll,leltlellt.xah+,.'l¢ R Jlld _' o| l dlth all,,,.'e_.alu.tted It!ill' all t.'lIIIL'lllelt, Jl

III11¢ Ol lllle,glloll dlld ..._,P l¢l'It.%¢llls 11111¢ etap,,:d MII_.¢ tllt'll I III

i ,_.',,.'tilldslIhe V+ +e,t,,, l,, I Mi 50 ,.itt'+',.tdll ,,,,,l,hi!,_l,," ,..illO. Planetary Arrival $ynthasis

be _..m,dtucted lIstIng %'(";_" i" I)1 .% - '_, .*n,l RI .% ;,.Ill tilt'Or ,.+,,l"t',,llt..'llt',,.Is hillt;_.', I_i¢ plall;.'tal.X dlll1..ll t[ale,,.'t _lX deslglt ph,blem ln+,,,l+,es

,,;allSt.x ilt_ the pt_.qo,.;t"+, ellgllle+.'llllg -:nd SClen{e ,,bleetlV¢.'., at

%. q I - • co,, ,, • ,,,s ,S . I " ,m., .... ,'_ tit,' target b,,d+x b+ _dJaptllg tile attl,,al ttaI¢+tOl.', lit ..s ,!:liable

lltJIIllel. As these ,+t,le,;Is_,es ma.,, I,e ,lUit¢ dt,,ers..', t,,li.x h,':t

lllnistt.ltl_,,," s,.¢liaXlm sh.tU h,. dn-,.'u.,scd i,l till,, se,,.'ll_,tl l'k+ +,.I" • ,in.'_ ) t31)

" _llbllel alltl,,,,lqlell,. !+lob_'.._lld h, a ,,l;Idll e%t¢l,! ,ahd¢l

_. Orbil -',Ilausieh prublem (.)[.l'Ital lault,:h lh,m tlt,: Shutth.'. UlX',,,I,,,,',lloltl ethel ¢l¢lltetlts el the 51.% -,l tlottl all% tei!lI,<_!aix ,,i

pet!!!ale!It ,.nbttal spa,.'e +tath,n ,.'o!!tlqeXes. mttodlnces c,tt.elx I !-'!._b._ trajeclu+ des|g,|, ht tins tm,,sl,,n n!od,.', he alll%al

Ile_ ¢o11.,'|+1`. utlo lilt' l.axlh-dcpaxtul¢ I,l,,bl¢:n St,me ,,,I tlaJ,'clot.x Is Itl,l luodit]ed lit +nil'+ d,:lell;tl;lislb." g J% at line

the lleV. +..+tlStla!lltS..nhead_, lllentl_+n,.'d, httllt ,,tl! al'll-,t+, pl.,n,.'t the ,,,l.,.t'lil.ll .lllll p,,lltt .lltd alti+,Ji !lille .It++' ,.h,,sell Lt,

to la'lndl a gli¢li liilell', ,tict.llX ll_is`.l,.,ni I I'e ,_i,,mlx ICgleS'sll!g s.ltislx t:l¢ I.IL_¢sl nunxnbct t'.l r_,tcntl.ll Obledil¢_,. IOlil_ belol¢-

`.pa{e ,!.ill_,ii Olbil I+,,.'¢ 1.I 25i 7eliei-,|l) d,_¢'+ li,,l ,:Oill.iili li.ind

lli¢ I-llllinll.X le,.h,I i_.'qUliCd .it dcrailUle Oibll hl¢lil!i¢

Ol t,lhel ++Ollsid¢lali,,ll`. iiia.'l dl,.I.lt¢ .l ,p.l_.¢ slJliOli',, ,,IbllJI Ihi`. ph,,¢,,,, ilit,+k¢`. !ti¢ ,:h,,i_.¢ ,.I alli+,.ll dJk Io eli,+uie

41111uric Ihal niJx bt" I,,o hlgli lol ,ill ¢lliclelll ilil¢,.li_,li In.ill de_iIJI,k" _hal.l,l_':i`.ll,`.. sti,,'i .l,, ii% • _,aliiL'_ ,,I Ilie %allables

IlinOlalil¢ depdilUi¢ silaleg:e`. .lle b¢¢il!lilil¢ h, eili¢il:+... %,liP. !1%1' /.-%l'h. _'i.. plCsCtiicd ill I,l,,ued h,illi iii Ih+.' datadllelnlllllilZ It. alle%la'¢ tlie`.e plobk'lu_ a I¢,¢1it %,k'll, c _',ll,,li,,l lhl,,I,_hlllle

?ll

l

d

1983010504-027

ORIGINALPAGt ISOF POORQUALITY

I)A|'. tilt" pi_lll,'t C,lti.lt.10Ld l,h'clul,dhln, h.... _lt tile IIIC_IIIIIII_ I I

,I_SIIIptl,stt'. I.L'., td lilt' I Ill|liill, ", Vel,'tOt. p'LIVldt"_ till," ;llt'aMIIl." L'LtSt! -- _I._i'" |:tnl the Illll_llliUlll I_L,sslblt• I.,'htt.lll_,, ,it Ih b_ It._ IIt'l._,;ItlVt" IS i ! "" I'

,,llSn k;ILIWII 4_ till,' I:ltltlll,h' Ot '_¢tth';ll Itllp,l_ I (| Ib'l). _llI,

The Ilhlgltlllll,ll," ol | Illllllll'_. VIII' i,I,'... , .i l,'llab|t's _qlr hi VIii' al,_n _',l:ll_h's lilt' l,k',_l_z..'l. IL_ el,':lhlalL' pl:mdLwenhl¢

¢l,_ltllttl lilt' 11._b._ tlllil .I,_',lt" .._ bt'l_,_'l,'l,'tl till," IIh'Olllllll. _,'llll,I VL'IIIt:II._'. i'. :It -'lily dl_l;lll_.'('. I. ,_tl till" |l.vlt._ hYl_rlbtd_l

Olltl.°s_Ull', V.. _'l,'l,'hll.'_I'_ .I ._Ult.ll_k" _'llLIh:_"_1 _'!(_('xl .ll_pl_S;l_'il

((' "| _111,llil_,.! I I_l,'t"I:l._: 'Ill / _;- I " _' I i : km ._ LI4i :,/

' II1 till," ,'.bert' t'tltl;lll_lt_, ill, (l,ll (;,|11,), I.',tilt" ,_I;IYI;.III¢III:II |!;11;1111- .

w11¢1¢)_. tilt' .I._._IIIpttsl¢ II;111.little. I'_tOlllld Imtlt t'tt'l l,_l"til_" .lltlV:ll b,,,h,

t

V! IIII(:AIIMPAL'I illl|N ANL;I I

PLIIN I

SUN _ I'

\

I AHlll \ HI AI',_I

" " IAS(:| NITIN(; NL)I)I

ASYMI'INItL'I,N,)I,, l i i v'' 'V-la i, I I

Fig 20 PIIIIIIIIIII¥ flyby WeOllll|Iy

!1

M

1983010504-028

ORIGINALPAGEISOF POORQUALITY

Another Fair of significantvariableson which to base TARGET B-PLANE,' T" IN""MING _'arrivaldate selectionare ZAPS andZAPE--theanglesbetween • u _u

•l:;"n";*,'....,..jand the planet-to-Sun........nrl .Earth vec'fnr_ re;pec- - ........ PARALLELTOA_TMrZUI,- _ INCOMINGtively.Thesetwo anglesrepresentthe coneangle(CA) of the _ _",_ ASYMPTOTE

orientedspacecraft,in that order. ZAPS alsodeterminesthephaseangle,_s, of the planet'ssol= illumination,asseenbythe spacecraft on its far-encounter approach leg to the planet: o

(I)s -- 180 - ZAPS (35) I

defined and discussed in the Earthdeparturesection above.

RBOLIC

The flyby itself is specified by the aim point chosen upon _ _ _ [ PATH OF

the ar-;.val planet target plane. This plane, often referred to _ '_ // "_,_ SPACECRAFTasthe B,plane,is a highlyusefulaim point designtool. It isa

" V. the relativespacecraft incoming velocity vectm at infinity. /• The incomingasymptote, i.e., the straight-line,zero-gravity _ INCOMINGASYMPTOTE

extensionof the V.-vector, penetratesthe B-planeat the aim J" V== 'TRAJECTORY PLANEpoint.Thispoint, dc..... ,1by the targetvectorB in the B-plane,is often describedby its two componentsB • T andB - R,wherethe axesT andR form an orthogonalsetwith V=. The B MISSPARAMETER, B_T-axisis chosento be parallelto a fundamentalplane,usually (TARGET VECTOR)the ecliptic(Fig. 2i) or alternatively,the planet'sequator.The 0 AIM POINT ORIENTATIONmagnitudeof B equalsthe semi-minoraxisof theflyb) I.yper- S PARALLEL TO INCOMING ASYMPTOTE,V==bob. b, and can be related to the closestapproachdistance. T PARALLELTO ECLIPTICPLANEalsoreferredto asthe periapseradius,r, by AND 1TO

R =SXT

)(( ,,,IBI - -__- ! + _ - I , km 136) Fig.21. Definitionof targetor arrivalB-planecoordinatesPp /

or The two system.s of B.plan_ T-axis definitior,can be recon-

lip (/lip _2 /t/2 oiled by a planar rotation.-AO, between the _cliptic 'T-andr = + +IBI 2/ ,kin (37) R-axes and the _'- and _:axis orientations of the equator.. based system

The d;,rection angle 0 of the B-vector, B, measured in the sin (a - c_:p)farget plane clockwise from the T-axis to tileB-vector position tan A0 =

cos fi X tan 8_.p- sip 6 X cos (am - (XEp)can easily be related to tile inclination, i, of the flyby trajec-

tory, provided that both//,, (DAPI and the T-axis, from which 13¢9)0 is measured clockwise, are defined with respect "o the samelhndamental plane to whidr 'he inclination is desired. For a wheresystem based o=1the planet equatcr (Fig. 22):

%.e and _.p are right ascension and declination of the

cos ipF0 = cos OpF(_X cos _ (38) ecliptic pole in planet equatorial coordinates. For Jupiter,PP._ t,sing constants in Section V:

which a_¢umes that Op_..¢is compttted with the T-axis parallel al..-p = 290.598 6Ep = 87.780, degto the planet equatoT (i.e., Tp/.-(,)= V X POLEp_.(ll,not theechptt¢, as is trequenth assumed 11'_.(,i = V ×'POLE/..,,! ). a, and ,_. are RAP and DAP. the ditection_ of incoming('are must be taken to ttse the 0-a,gle as defined a,;d intended. V. also in planet eqttatorial coordinates.

2O

1983010504-029

ORIGINALPPGE '";,J

OF POOR QUALITY

ECLIPTIC POLE (EP)

PI.'('I.PEQ POLE / ,I"PEQ DECLINATION

lil,i." OF EP, _EP

PEO RIGHTASCENSIONOF EP. aEp

.90 °

:PLANE(ECL)

PLANET EOUATOR(PEO)

a,..- 180

.-PLANE.TOV.It -- \ P:C'I.

TI,I.,CI: V_ \ Ptv..CiAa : 90- [(aEp- 90)- (ooo- 18011-.ooo-aEp

At/- ARCTAN [SIN A¢_,"(COSboox TAN ¢5/:..p.. SIN _,_, x COb Act)]

Fig. 22, Two :r-axisdefinitions in the arrival H-plane

The ¢oriection All i,_applied to att ;lllgle ¢onll_Ull'd ill the i_eliapsc, ,ll the I'liti) poinl of a plobc, ol gcn¢ially .'it :ill)

l'¢lipli¢ ._.l,'sll,lll ,is hllloivs IFig. 2}i: pOSllilln r Isull,_,-iil_i ,%"= SIIII, could hi" il, placed by !"_ I::lrlh,; if dc._i_edL t_'e Fig.."41:

Oi,l.U .'. tilL. I �.%0(4tl)cos ,1' -- -cos _l. \ cot/AP_ - sin i#, \ sin/AI_

I'hl" ¢¢11pli¢T, lt_-l,! -ixcs, lllll_t,l'l'l, h-',ve Io be llll,ill, d b.%

-A0 tdockllis¢ dllCt:llOll IS llOsllli¢ Iii Ih¢/I-pl.'lll¢I hi otll:llll \ cos {1"11_1'- li,_.i.I 1411p!,uil, I t'qllahlllll i. I_FI, I ¢lloldui:il¢ a.xcs lhl,/I-nl,iglUllidl,ol Jll 11111ilOlnl in ¢llhl, i ,_.%,_I¢11li,_Ihe ._;lllli" wh¢le

I'h¢ plOl¢¢llOns of lhl' SIiil-lO-i_l,lnel _llld I:alih.lo-pl;iil¢l Ii -- Ih¢ ,illn pOlnl -'ingll" I:l Ih¢/t lllan¢, lllii,_l he wilew¢_,ois illlO tire II pI;ille Tcpr¢,_lll ainl poinl lociofdi;llli¢llk" iespecl IO the ._iilll- :r, ,i,_I-i',_PSIIli "-illd I:,iilh L_,'¢ull,illOns, lespe¢llvl'l%_,,i,_d¢llnl'd in I:i I, 2.1,I'h¢ it phin¢ t#-,ingl¢,_ll_ illi iesp¢¢l Io Tt,%,! ,1%1._1of Ili¢,_¢v-'lil- tJ,. -- Ih¢ ;illw:il lang¢ _nl'.l¢ lioll _.illliilll) I;i posilloll I,ii;iblcs ,lie pi¢,_lllCd :illd I'.ll_ded l'i,_l' ;llttl Frl-P,icspccti_,el_, oul oil Ih¢ Ili<Onilnl_ ,is)inllh_ll'l hi Ih¢ I_llllil ol

Illl¢ll'fl r ll:lg 2,_1in Ih_" plollcd iilllSion dal-'i. In ,iddilion Io h¢lpul I dl'Slgll Ol

l,lsl' ,IVOld dl,lnl¢lll_" _.'ciIIl-'illOns, Ihl'l" qll;illlllll,,_ alh,_ rhe ¢Ollll_Ul;lllOli of lhl" ;lliil'-'ll i.'Ulge -illgll', ii,,, io die

¢ollipulalloll ol ph,i._i',illl_lcs,_l_, of llll" pI,in¢l al Ih¢ spa¢¢¢l;ll'! po,qlioll ol the dcslicd ¢_,l,lll dcpcnd,_oil I!$ Ii l_l', ,11l\_llo_'s

21

i

1983010504-030

ORIG_ALPAGE1OF POORQUALITY

SUN (OR EARTH) TO I. At flyby periapse. (i_,, ->-L_Odeg):ARRIVALPLANET VECTORB PLANE

-icos/_. = cos(-v) = (42)

{.2 rp

SHADOW PPNDER

(SUN OREARTH) (Tp is periaps_ radius).

2. At given radius r. anywhere on the flyby trajectory•_ .(see Fig. __ ).

/]= = -_ + _ (43)

u® should be computed front periapse equation.

: Eq. (42) _r at r can be obtained from t-v= _g v r _g +

v,,. v r has negative values on the incoming branch):

T r r, _ 2+ P-----_-_ -1

r ppcosv =_' (44_

I rp1":1t!+

Pp !

TO SUN 3. At !11e entry point h wing a specified flight pall= azlgle

(OR EARTH) R "_1."IFig. 25"w.

Fig. 23. Definition of approach orientational coordinatesZAPS and ETSP. ZAPE and ETEP _. : -=- + I'F (45)

INCOMING TERMINAIOR

ASYMPTOTE d_s 90:

180 ZAPS "

r. RADIUS TOA POINT ON

TO SUN TRAJECTORY

TRAJECTORY ARC _;,, Rl.(.i. PHASE ANGLE. '[_ PROJECTEDuNITSPHEREONTO

.._ "ETSP- 180°-0

Fig. 24. Phase angle geometry at arrival planet

22

i

1983010504-031

ORIGINALPAGEIOF POORQUALITY

ARBITRARY TRAJECTORY OUTGOINGPOINT AT RADIUS r ASYMPTOTE

AND TRUE ANOMALY UrX I

FICTITIOUS

ENTRY PERIAPSE

RADIUS. rp /,/h

FLYBY PERIAPSE

PLANETARY RADIUS. rpFENTRY ENTRY

INTERFACE _oo= Uoo

TURN ANGLE

= 180-2p

IMPACT

POINTAT RADIUS

rE = rSURF + hL.AND FLIGHT PATH

ANGLE 3'p"FLYBY

INCOMING _oo= -v=,A,qYMFTOTE

ENTRY

FLYBYTRAJECTORY

IBI-I-"FFLYBY MISSPARAMETER

Fig. 25. Typical entry and flyby trajectory geometry

23

1983010504-032

ORIGINALpAGE Wof POORquM.rrt

where PE is the true anomaly at entry, should always control of arrival time. The number of satellites passed at

be -lep,ative, and can be computed if entry radius and various distances also depends on the time of planet ('/,4.

altitude, rp..= rsuRi,. + h_: and Vp..,the entry angle, are These fine adjustments do, however, demand arrival time

known: accuracies substantially in excess of those provided by the

ra V _ computational algorithm used in this effort, which generatedrp 2 + _2 -I the subject data (accuracies of I-5 rain for events or I-2 hr_. /Jp ] for encounters would be reo, ired vs uncertainties of up to

cos u_: = V 2 (46)• 1.5 days actually obtained with the rectilinear impact pseudo-

(l+ p " ) state theorem). Numerically searched-in i,ttegrated trajec-/l tories, based on the information presented as a first guess

in.put, are mandatory for such precision trajectory work.

, whereas the fictitious periapse radius rp for the entry.

to satisfy _/_:at r_:, is equal to Preliminary design considerations for penetrating, grazing.

_ 'I'_"_ _ I" /I (_-,_)/1"2 I V2 )1 °r av°iding a h_)st _)f planet'centered fields and particle strut"

/zp / . lures, such as magnetic fields, radiation belts, plasma tori. lingrp = I + + rF cos27_: 2 *"u rE and debris structures, occultations by Sun, Earth, stars, or

• /Jpsatellites, etc.. can all be presented on speciahted plots, e.g,,

the B-plane. and do affect the choice of suitable aim point

(47) and arrival time, All of these studies require the propagationof a nmnber of flyby trajectories. Adequate initial conditions

The B value corresponding to this entry point can be com- for such efforts can be found in the handbook as: VHP (V t

puted from Eq. (36), while _J,e 0 .. "le in the B-plane would and DAP (6) already defined, as well as RAP (_), thedepend on the desired ent,. tatitt_.te inclination, Eq. (38), or planet eqt atori_! right ascension of the incoming asymptote

phase angle, ,.q. (41). (i.e.. its east ',ongitude from the ascending node of the planet'smean orbital plane on its mean equator, both of dateJ, The

The general flyby problem poses the least stringent con- designer's choice of the aim point vector, either as B and O, orstraints on a planetary encounter mission, thus allowing as cartesian B • T and B • R. complete the input set. Suitable

optimization choices from a I:rge it< ,.f secondary parameters, programs generally exist to process this information.such as satellite viewing and occultation, planetary fie!ds andparticle in situ measurements, special phase-angle effects, etc.

2. Capture orbit design. The capture problem usually

A review of the plotted handbook variables, required in tile involves the task of detemfining what kind of spacecraft orbit

phase-angle equation (Eq. 41 ), shows that the greatest magni- is most desired and the interconnected problem of how and attude variations are experienced by the ZAPS angle, whicb is what cost su':h an orbit may be achieved. A scale of varying

strongly flight-time dependent: the longer the trip, the smaller complexity may he assnciated with the effort envisioned anZAPS. For low equatorial inclination, direct flyby orbits, this elliptical hmg period orbit with no specific orientation at the

implies a stead_ move of the periapse tuwards the lit side and. trivial end of the ,_ale. through orbits of controlled or opti-

eventually, to nearly subsolar periapses t_,r long missions. This mized line_ of apsides (i.e., periapse location), nodes, inclina-

also unpiles that on such flights the approach legs of the tra- tion. or a safe perturbed orbital altitude. Satellite G/A-aidedjectory are facing the morning terminator or even the dark capture, followed by a satellite tour. involving multiple satel-

side. as trip time becomes hmger, exhibiting large phase angles lite G/A encounters on a numher of rewdutions, each designed(recall that phase is the supplement of the ZAPS angle on tn achieve specific goals, probably rates as the most complexthe approach legl. This important variation is caused by a grad- capture orbit class Some orbits are energetically very difficult

ual shift of the incoming approach direction, as flight time in- to achie le, such as close circular orbits, but all require signifi-

creases, from the subsolar part of the Jovian leadmg henusphe, e cant expenditures of fitel. As maneuvers filrm the backgroundIm tile sense of tts mbital mottonl It, tts antisolar part. It) this subject a number of useful orbit design concepts shall

be pre_nted to enable even an unprepared user to experiment

The arrival time choice on a ver_ fine scale may greatly with the data presented.

depend on tile desire to observe specific atmospheric,:surface

t'ealm _',_(e,g.. tbe (;real Red Spot) or to achieve close encoun. Tile simplest and most efficient mode of orbit inlection is

ters with specific satellites of the arrival planet. Passages a ¢oplanar burn at a ctznnnon periap._ of the arrival hyperbola

Ihrough special _tellile event /ones. e.g.. Ilux hlbes, wakes, and the resulting capture olbit (Fig. 26). The maneuver AI"get_.'entrlc and ou heli_.'entric occultations, require close required is:

24

t

I

1983010504-033

ORtcISIALPAGEISOF POORQUALITY

I " /, ........ A idol of orbil in._'ilton .._1' lequzzed ;1_:i I'ullcllon el #i, .Ind- p,, #r_i- p;, \ v l I' . ...%1'": " ¢ .... , kill .,, 14,'4) lusnlg I', !. 50| is Plrsellled Ill I:lg. "" l'he ,Ipo,ll_sei:lthu.,, of

• rt, lr-I4"(,i su_'h :IllOlbll ol_lYell llVliOd would Ill,

The oibilal petted I'ot mlrh .in orbit, tequuing kn,lwledge /'- Pr \ t':ofperlal,_,:llldapO.llt_"ladit,r/.:llld/'4•IS rl "-" .i/............el, .kill (_I)

%. _-"

,/L: i<jFr I �r1"1/' " An e_:dualiontit"l'q.1501(,tndl'lg._")silov.stheirlo_,esl

!' 2= ,/ Pt' . .', (4'}) titbit Ili,k'lIlOIt _1 IS obt:uued Ioi tilt"Io_t'st vahle t,f r/,. lilt"iOllg¢.,I pet led !'. alld tile lowest I _..of alliV:ll.

It till tile ethel il:llld, a klloWll Olblt pelted l' (ill seconds}

is de_lletl, tile e.%ple.,_:41Oll(tit & I'is Of some Illl,.'leSl IS hlleetlon illlo ClleUlal ¢apttli¢ Olblt_. a

special C:l_, of tile ¢oapsld:d ill.,ierliOll piobient. It call be

3: ..... '"""'""'""'=""'"'"'""'""""'""'""'""",,. , -_"_,.I- ",. :L".,.'"/ <,,,,,,,,<",,,,,,,.,,,,<,,,,.,,.,,,,,.<<,.,,,,,<,,>.,,,<,,,<,,,,.,..-,,.,.,...rl, rp _/_ l" l (Sill l'llCUlal till,it.i, Ilu,'h v.ould lequile a sl,eclll,: I-'ldlU._.

COAPSIDAL COTANGENTIALCAPTURE CAPTUREORBIT ORBIT

t. I

/ \APPROACH (., .7

\ \ "#t "HYPERBOLA _ ,_ COTANGENTIAL• ./ IURN POINT

ORltl T PERIAPSE / II-" \ COAPSIDAL BURNAND PERIAPSE OF

HYPERBOLIC PERIAPSE _ ITS CAPTURE ORBIT

Fig, 26. Colipsldlll and cotingentlll capture orbit insertion geometries

ill

l

1983010504-034

Oflllt_ PAGEMoF poor q,JAUTY

Atop. one can solve for the hyperbolic periapse rCA apd tileCAPTURE burn radius • using selected values of true anomaly at hyper-ORBIT

7 I I " he|it bur.-, point I,, =rid it_ eaptilre orbit equivalentNOTE: COMMONPERIAPSE [ PEfllUU: ....

301 I .... RJ

! INSERTION MANEUVER j'-j--'3_ - -,v6 - t.J : 71398k. _x_° I p _ : v'! (551

5 rp = 5RJ utilizing the folowing three equations (where E ai,d it stand/ 200 ) for elliptic and hyperbolic, respectively):

P=, I ,.:

= , .j v (r"+:).,r.-;>3 s / ) PERIAPSE sill I'/. -

'RADIUS / rCA |'2 ' (56)

O 2 D_rp=IRJ 2r.lr P _)1+**

'- ...."I

o ill|lilt, ,i,,l,lil ../ - - +2

ARRIVAL V-INFINITY V.., km/s rca _ /_p /• = (57*

Fig. 27. Coapsidalcapture orbit insertion maneuver AV [ r(._. 1"_

requirements for Jupiter (usingEq, 50) t ] + _ / cos Vii + ]/Jp /

2 lu,- (52) 2 ra

re'° I'2 = 158)

while the corresponding optimal value for A V would be rp

• - t_ II The procedure of obtalninl_ a soluqon to these equations is.11('o _ _, ""

iterative. For a set of given values for r I. rt,. and all assumedFrequently die orbital r.'ldius obtained by use of Eq, {521 is .3to. a tgl of I"H and i_. the hyperbolic and dhptt_:al bullinconlpalible with practical injection aspect., or with arrival point true anomalies which would satisfy Eqs. (55-58) canplanet ._'ience and engineeling objectives, be found. This in turn leads to r, the maneuver point radial

distance, and hence. ,.%i"(Eq, 54). A plot of _l'cost for a set

A nlore general el,planar mode tit"capture orbit insertion, tit consecutive .31_r choices will provide the lowest .3 l" s aluerequirivlg Ollly tangenliality of the two trajectories at an I'ot this nlaneu,'er ntode.

arbltlai.% in-qlt tlv¢l pOllll of radius r common to both oibli.,,.

Fig 2b. vequue,, a propulsive effolt of For an optimal insertion into an tobit of an atbittal._ Illa.lt)laxis tlrlentatlon one mUSt tUln to tile mole genelal.._Illl ¢o-

I,l'+ ",, .I-'"':' +,,.-,l pial,ar,b,,,.,ersecting(ie..°,,,a,,gent,albu,,lp,,,,,,,,,,=,.31"=, 7 -- (54) euvel (see Fig. 2x). It provides sufficient flexibilii_ to allow

%, _/ r(r_ + r) numerical optimization of .31" with respect to apsidal rotation,

.3%it Call be cleari._ seen that b) pert\tuning the burn at periap._e

the substitution r : rp brings us back to Eq. 1481. A inole apploptiale wa) to define ap,..idal olientation is tonleasule tile ptlst-nlaneuvei rapture orbit periapse posillOll

The Colang¢llllal maneuver mode prowdes nolll.)plinlal con- angle with lespect to a fixed direction, e.g.. a far eucounler

lrol ovel the OlletlldtIOII tie the inaiol axis tie tile capture orbit, point till tile UlCtlnllng a.,,ymptot¢. -V,. thu.i defining a cap-It it i,, desiled to rotate this line tie apsides ¢lockwl._ by lure oibit perlap._ iange angle

111

l

1983010504-035

OR_Gr,_ALPAGEBor POOR

INTERSECTINGCOAPSIDAL CAPTURECAPTURE ORBITORBIT

'A

VE 2ND BURNPOINT

r2 OPTION

v=ASYMPTOTE

II II I I

%

== / \APPROACH I NOTE:HYPERBOLA / E = ELLIPTIC

H = HYPERBOLIC

CAPTUREORBIT / _ PERIAI_E, rcA.CAN

PERIAPSE,rp I VARY: rA ;_ rCA ;_O.

I PROVIDED rs IS AVOIDED.

I OPTIMAL BURN AV1STBURNPOINT REQUIRES tCA ;_zpOPTION

Fig,28. Coapsidalandintersectingcaptureorbit inurtion geometries

where

0 = I /,_ xr_,x-- I-"_, _,_._I v ,_.., I"_=I +1" r I

I+ "=_ ,_ -'p_,lr-_,Al+ i'_ ir2-rz_.._ilir-rl, i(r.., -,i I#p

IbOiTaken from lef. 8, d,e expression for the inlersectinl bum

.._I"is'

, ! .'

_1": = I'" + 2 #/, rt �-7 _¢/ rl + r × L) r I alld rl, = apoapscandperlapscradiiol caplllrc +')lip._

t'/

1983010504-036

ORIGINALpAGEBoFeooeQuALrrY

re,4 = closest approach radius of flyby hyperbola

n = /_ .mean orbital motion, rad/s (63)t -- flag: _ = 4-1 if injectinn occurs on same lee(inbound or outbound) of both hyperbola

and capture ellipse, 6 = -i if not. r l + re

a - 2 , semi-major axis of ellipitical orbit, km (64)it should be pointed out that Eq. (57) and (58) still apply

in the intersecting insertion case, while Eq. (56) does not 2 rA rp(as it assumes orbit tangency at bt.rn point), p - , semi-latus rectum of elliptical orbit, kin(65)

rA +" P

The evaluation of intersecting orbit insertion is more

straightforward than it was for the cotangential case. By assure- R s = Jupiter's equatorial surface radius, km

ing V andorUit size(e.g., V =0km/s,r_ =4RJ, P= 20017

days. similar to a Galileo capture orbit) and stepping through a "/2 = Jupiter's ublateness coefficient (for values see

set of values for vE. the capture orbit burn point true anomaly, Section V on constants).one obtains, using Eqs. (57-60), a family of curves, one for

each value of Rt,.A , the hyperbolic closest approach distance. For the example orbit (4 X 272.4 RJ) used in Figs. 28As shown in Fig. 2t), the envelope of these curves provides the and 29, if near equatorial, the regression cf the node and

optimal insertion burn AV for any value of apsidal rotation advance of periapse, computed using Eqs. (61-65), would

A_o desired. The plot also shows clearly that cotangent...,I and amount to a negligible -0.23 and +0.46 tier/year, respectively.apsidal insertion burns are energetically inferior to burns on For contrast, for a grazing (a = 71,398 kin) Iow-inchnation,the envelope locus. For the same assumed capture orbit, a near-circular orbit, the regression of the node would race along

family of optimal insertion envelopes, for a range of values at -64.5 deg/day, while periapse would advance at 129 d:g/

of arrival V, is presented in Fig. 30. The mlallest value, day, i.e., it would take less than 3 days for the line of apside_

V = 4.458 kin/s, represents the remaining pre-insertion to dua complete turn.energy after an lo encounter, typical of Galileo mission

It should be noted that _'Z= 0 occurs for i = 90 deg, whilestrategy. CO= 0 is found for / = 63.435 deg. Sun-synchronism of the

The location t_f periapse with respect tu the subsolar point node is achieved by retrograde polar orbits, e.g., a 5 P-J cir-

is of extreme importance to many mission objectives. It can be cular orbit should be inclined ! 11.08 deg.

controlled by choice of departure and arrival dates, by AV 3. Entry probe and lander trajectory desiBn. Entry tra-expenditure at capture orbit insertion, by an aerodynamic jectory design is on one hand concerned with maintenance of

maneuver during aerobraking, by depending on the planet's acceptable probe entry angles and low relative velocity withmotion around the Sun to move the suhsolar point in a manner

optimizing orbital science, or by using natural perturbations respect to the rotating atmosphere. On the other hand, the

and making a judicious choice of orbit size, equatorial inclina- geometric relationship of entry point, subsolar point and

tion, i, and initial argument of p,,riapsis, wo, such as to cause Earth (or rela) _pacecraft) is of paramount importance.

regression of the node. _'_, an_ the advance of periapsis, CO. Lighting during entry and descent is el'tel; considered the

both due to oblateness to mo/e the orbit in a desired manner primary problem to hc resolved. As detailed in the flyby and

or at a specific rate. Maintenance of Sun-synchronism could orbital sections abo_e, the choice of trip time affects the valueprovide constant lighting phase angle at periapse, etc.. by some of the ZAPS angle which m turn moves the entry point Ior

or all of these techniques, l:or an elliptical capture orbit longer missions closer tt) the subsolar point and even beyond,

(Fig. 31 ). towards the morning terminator.

2 nj 2 180

_'! := --_X"3 Rs_.._p2 ct_siX _,n deg/s (01) Landers t_r balloons, regardless of deceleration mode,prefer the morning terminator entry point which provides a

better chance l't_rvapor-humidity experiments, and allows a

Co ='T3 X _R_ n J, 12 = I- :,) sin: i)×S_" 180, deg]s longer daylight interval for operations f, Uowing arrival.. p: v

The radio-hnk problem, allowing data llow directly to

iO2) I'arth. el via another spacecraft in a relay role. is very complex.It could reqmre studle_ tzf the F,arth phase ungle at the entry

where It_:ations or alternately, it could require detailed parametric

I

1983010504-037

ORIGINAL PAGE |_;

OF POOR QUALITY

-I

1983010504-038

3O

1983010504-039

1983010504-040

ORIGiNAl- pAGE I11OF pOOR QUALITY

IV. Description of Trajectory Characteristics vector obtained by vecto,ial subtractionof theData hehocentricplanetary orbital velt;city from the

spa,'ecraft arrival heliocentricvelocity. It repre-A. Gel'Im'al sentsplanet-relativevelocitya' ,reatdistancefrom

The data representtrajectory performance informatio;_ targetplanet,at beginningo, far encounter.(.:anplotted in the departuredatevs arrivaldatespace,thusdefin- be used to compute spacecraftvelocity at anyingall possibledirectballistictransfertrajectoriesbetweenthe point r of flyby, including ('/A (periapse)dis-two bodieswithin the time spanconsideredfor eachoppor- tancerp:tunity. Twe]veindividualparametersare contour-plotted.The

first, C31., is plotted buId (m a Time of Flight (TFL) hack- I" = /[:2 + 2_p km/sground;the remainingten variablesareplottedwithbold con- _/ r

I

touring on a faint C_L background. Elevenplots arepresentedfi)r each of twenty ntission opportunities between Iq_5 and where2005.

The individual plots are labeled in the upper outer corner PPfJt'Prrl..'l¢= gravitational parameter GMby bold Iogos displaying an acronym of the variable plotted, svsre:._lJ of the arrival planet system-the mission'sdepartureyear. and a symbol of the targetplanet. Jupiter plus all satell;tes. (ForThese peru)it a quick and fail-safelocation of desired informa- values, refer to Section V onlion. constants.)

B. Doflnition of Oeparture Vmr,_abl,_ I)AP _a, planetocentricdeclination(vs meanplane'equator of date) of arrival |', vector. Defines

C._I.: Earth departure e,ergy Ikm-./s2); _me as the lowest possible flyby/orbiter equatorial inclinationsquare of de, ,s,lure hy'perl,olic excess velocity (dee).[.2_,= (.3L = |.2 _ 2 pe./Rl, where

RAP o.._. planetocentric right ascension (vs meani_ =-..onic injection velocity (kin/s). planet equator and equinox of date, i.e., RAP is

measured m :he planet equa*.orplane from ascend-R! = R_ + h! , injection radius (kml, sum of in.',node of the planet's mean orbit plane on the

surface radius RspL,t.x./.r and injection planeta_" equator, both of date) Can be usedaltitude hI, where Rs_._krH refers to together with VIIP and DAP to compute anEarth's surface radius. (For value, see initial tlyby trajectory state, bu: reqt'tresB-planeSection V on constants.) aim point informal;on, e.g., B and 0 (dee).

PF = gravitational constant times mass of ,he ZAPS Angle between arrival [', vector and the arrivallaunch body (for values, referto Section V planet-to-Sun vector. Equivalent to planet.probe.on constants) Sun angle at tar encounter: for subsolar impact

C3L must be equal to or exceeded by the launch would be equal t, I,_O dee. ('an be used withvehicle capabilities. ETSP, VIII), DAP, and 0 to determine solar phase

I)LA: fi-n "geocentric declination Ivs mean l'artlnequattJr angle at pertapse,entry, etc. (deg)

of iqSO.O) of the departure V vector. May ira- ZAPF Angle between arrival t', vector and the planet-to- 'pose launch cons, taints (dee). Earth vector. Equiv',dent to planet-probe.Earth

RLA: a./., geocentric right ascension Iv,, mean l'.'arth angie at far encounterldeg).

equator and equinox of lt|50.O) of the departure ETSP Angle in arrival B.plane, measured from T.axis',I-" vector. Can be used with C31. and DLA to cha:kwise tO projection of Sun-to-planet vector.compute a heli_:entri¢ mittal state t'.r tralectory l:quivalent to s_daroccultation regton centerlineattalysts I deg) dtfectton m B-plane Ideg).

ZALS: Angle between depature I'. vector and Sun-Earth ETEP Angle m arrival B-plane. measured t'r,m T-axis .vector, l-qutvalent to Earth-probe.Sun attgleseveral ch_:kwtse, t,) projection of i-arth-to-pl_et vector.daysout (deg). l.qutvalent to l-at,It t_cultatloq legion centerline

C. OMInition of Arrival Vlrlalalu direction in La-plane(deg).

_,lip i ,._. plarletocetttrh; ,,ritual h_ pc, bolt,, ex,.e_x "EISi',.-.dETI-.Pplut__re b,tsedon r a,t,.deemed, bckqttptralleltoveloc:t) or l'-mfinit) Ikm s). the magmtude of the ecliptic plane(g- text tot ¢_,pLtn.trtohl

• .,am*jP-.-_ •

1983010504-041

f.

OWIQINALPA(3EmOF POOR QUALITY

V. Table of Constants ....... _-;_.,_.............._|11 |;,L'(" thhlI

('Ol,.,|-'llll', tl._t'd |O I_,t'Vl_'l,lt(" the Ilt|,Hlll.llltlll I_lt',_Clll¢'d ;It{' (;M. R;Idn|l._. Radius. t') Petb)d.

SIIIlllll:lll/¢'d In lhls _'l'llOII, .1'.!_,I"|'''_ hill L::; _.i,_.,,

A. Sun Jllpltrl I?bt'lHb467 :1.1'_,_II 11,41i._._11(*el, Rnnl_s

t;.tl I ;" .'l : .I.;'J '}.;_ kin "1s"_,, ._;4 I_4:(1 421571 I 'hL}I .IX2

/(',_I"/,'I It "I (_*}(_t'lOl) kltl I nlop.1 .;lql, I._._l b7Llq81l, I 5_1 1141_)I;ant n11rde I)148_ ._(,1124 1070.1.114 7 15455.10

e. Ellrlh/Moon Syslem L-.llll,lU ....................Vl ": 244_ iHl_?S7_}. 1668qlllt4o

(;'IIA- 1,4.17'If .It|.| %(| | _% I kill ] $'_ lel L'ontpllled fvom perked and lupllr! (;.If. io,ndcJ• ' I*'Pl | el ._)'_|(Dlll III .Ill|lilt41 Iot;lllOll 1.1|¢

(;'Ill 81,"rH ._}._hO0..l.l._II." 1 kill -s .,;:I)irecli_m of the Joyi,'llt pl,lltel;lr.v equatorial norlh pole

.I, LI.IXIILI,_;(,.; (in I:arlh Mean l_q_,latOl_d"l_)._l).O¢oordin'lt_._):

/_',_r'l_ a,"; I,.|'._ I.lll kin'_v -- (_4"S(%10_)"deg

C. Jupiter System D. Sources

c;,If,_.l,_r_._ I:(: "1 : (A_; '.;4 knl_ ._:The constants repte_nl tile I)!:.-I 18 planetar.v ephemeris

.I, _ O.OI.I_,;,_I_IN (!_1) and tile Vo.v_er-2 Jupiter encollnter trajectury"._ "t'n't _," tecottslrucliOll da!a (1_7_)).

1983010504-042

Acknowledgments

|'lie contributions, review,,, and _uggcqiun,, b_ n.cmut, J_ u_ u,..l.,.iuo,,,,,, A,,,,,,v,,Committee, especially those of K. T. Nook. P. A. Penzo, W. I. McLaughlin. W. A. Bull-

man. R. A. Wallace. D. F. Bender, D. V. Bymes. U A. D'Amario, T. H. Sweetset, and

: R.E. DieM. as well as the computational and ph)tting _gorithm d_velopment effort byR.S. Schlaifer are acknowledged and greatly appreciated. The authors would like tothank Mary Fran Buehier and Paulette Cali for their editorial contribution.

References

I. Sergeyevsky, A.B., "'Mission Design Data lbr Venus. Mars. and Jupiter Through19qO,'" Technical Menlora:_dut_.r 33-736. Vols. I, II. III. Jet Prupuision Laboratoo,.'.

Pasadena. Calif., ,Sept. I. !q75.

2. Clarke. V. C., Jr.. Bolhnan. W. E.. Feitis. P, tl.. Rotb, It. Y., "'Design Pat:-'meters for

Ballistic Interplanetary Trajectories. Part 11: One-way Transfers to Mercury andJupiter." Tedmicai Ret_ort 32-77. Jet Propulsion Laboratory. Pasadena. Calif.. Jan.IO60.

3. Snyder. G.C.. Paulson. B.L., "'Planetary Geometry |landbta_ t .'" JPL Pubht'atio.i

,¢2-4-', (in p:eparatiot)L

4. Ross, S.. Planetary Flieht ltandbook, .V..IS4 SP-35. Voi. III. Parts I. 5. ae.C 7. Aug.i t)63 - Jan. It,%t).

5. Wilsol'. S. W.. "'A Pseudostat¢ Theory for the .gpproxilnation t_l"three-Body Trajec-

tories," AIAA Paper 70-I0(_1. preseuted at the AIAA Astrt,:ly:,amtcs Conference.

,_illl-'l Barbara. Calif.. Aug. I t}70.

h. Bymes. D. V.. "'Applicatitm of the P._udostate theory to the "l'hr_e-Body Lambert

Problem." AAS Paper 7_)-It_3. presemed at the AAS'AIAA Astrodynanucs Confer-elite. Provincetown. Mass.. June Iq7q.

7. Clarke. V. C,. Jr., "'Desig'l of Lunar attd Interplanetary Ascent Trajectories," Tech-

nical Repctrt 32-30. Jet Propulsit)n Laboratory. Pasadena. Calif.. March 15. l t)(12.

8. Kohlhase, ('. i-.. Bolhnan. W. |-., "'Trajech_ry Selection Considerations for VoyagerMiss|oils to Mats Dttrillg the It)71-1o77 Tmle Period." JPL hlternal Docunletlt

I.IPD=2sl. Jet P opulsion Laboratory. Pasadena. Calif., _'pt. IO05.

q. Anotlytnttus, "'Assesstnent of I)la,etat._ Mis.,,iotl Performance as Launched _[otll a

: Space Opeuitions ('eilttr.'" Presented by Science Applications, I,e. to NASA Ilead-

quarters. Feb. I. ION2.

It).Beerer. J. G.. "'Orbnt ('hange Requinemeuts attd Evaluatnou,'" JPL Internal Document725-74. Jet Ihopulsttm Labor:ltoty. P:lsadena. Calif.. Match tl IO82.

34

21

1983010504-043

Mission Design DataContour Plots

Earth to Jupiter BallisticMission Opportunities 1985- 2005

3b

1983010504-044

Earth to Jupiter

1985

Opportunity

ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 84.288 I 85/04/17 87/03/23

C3L 83.500 II 85/05/15 89/02/10

VHP 6.0059 I 85/05/03 87/10/09

VHP 6.0550 II 85/03/31 87/10/16

31

a J

1983010504-045

1

C3L om._ PAQ,-",

1985EARTH - ,.]UPITER 1985 , C3L , TFL

* BALLIS "r[C TRANSFERTRAJECTORY

!_ !/r / f] .

•11 •4"/900.5

i 1,_',_-

M

2,

1983010504-046

m

1983010504-047

87/0t/05 46800.5

86 / 09 / E7 46"/00.5

410

1983010504-048

41

42

i

1983010504-050

1983010504-051

44

1983010504-052

1

1983010504-053

41

1983010504-054

47

1983010504-055

411

1983010504-056

Earth to Jupiter

1986

Opportunity

ENERGYMINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 84.154 I 86/05/26 88/06,'ft7

C3L 80.658 II 86/06/11 89109126

IVHP I 5.8436 I 86/06/07 88/11/19

|

VHP I 5.9105 II 86/05/12 88/11/30I

411

1983010504-057

So

C3L =oFeooR_Jw

1986F-FIRTH - JUPT TFR 1986 , C3L , TFL

N BALL IST !C TRANSFER TRAJECTORY

"""'0' H - ",'- "'="'"_'" H --. -TT'7 V.;_7 -_ '0" .,8,oo._o,,o_,,_ i "- il 1"/ ,/,_,/,// / ,o.

i i 12"i"•/1/,f.,"// I ,8_._•o,,,,o_ I i V,K j "/lt,,r / i .182=i._,

i IVI/l/7 i l i / i

! ,,"/1 XA,,A//" AI_

_,o7,2, I _ ix " Vif/_'tr A v !, L I i_._. .,81oo._- i/i ,,/,_//V l/l,.K I/, "> ,,,,,,..,oooo.._.,,o,o,,o,, ,'/ iii i,,Pi / A F I IL _ "_ZLA '_ ,7,,_o._i°

• I/ /, r/I,,_f ," !,_ll, i,J _ I,o. oi,d

o ,, ill., i _l,_'Aiell._ .,v_._ ooi ) _ll

{'%1_o_,_,2_ /,I I, ,/I, i ,_ ."lP'._ I I i ,, -" 180. - 47700.5 I

> _._ I/ ,,l,_l_i_._,'-.,,,i_.._a,15.:'-I i,'ti_'l 1I,_,o_,,_ - ' "/ II I,_'ii /r Ir._.._-JP/I-I / / I,,%' / _. ' ._,== / I II,,!1 .I II D'_',llrik_. V '/!,'1/ / .,7_._,1 III,'i[ / L'_.'I"C,II/! A //,'/._'. _ =-

.,,,,,o_ / I //i/III I 4i_._"/I _ i/V A/ '/ ,_/ ,'_._l/ t//! l_'_._i".,,_. I A _ A/Y/_ /,/=,o,,,_ i / _/ / ......_.,=_l_x'_'l/LL/I//// .,,,oo._

8BIO_Ii9 I t l ,- "_.- //-/ L,,," I /I ]r 7-/-r_ _- -47_.5__..=_iil _'_dliiElY__/i 1 / ! 11 # l .4 l

-,-,- /_._- I, ".'/I/!

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LRUNCH DRTE

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1983010504-058

61

p-' -......... ...................... , ,- i - _ .... _ ' _lllhlakUl=mll._m_ ......... .....-,, ........................ t

1983010504-059

ti2

k

/ o

1983010504-060

; ORIGINALrAGEI= 4.oFpoorou4_ ZALS

1986EARTH - JUPITER 1986 , C3k , ZALS* BALL IST IC TF_AN.SFEI_ TI_AJEC.TODY

91109101 •48=J00.5

87/11/0l 47100.5

13

"_'_ ..................... I I ............... i imlllll- - i • ......

1983010504-061

5, ORi_ztG_l..IrAUE i_lVHP o_-PooRQua.

1986EARTH - JUPITER 1986 , C6L , VHP

• BALI i T i - T_.'AN:.FEF--, TI.;AJEC. T,'31;Y

66 66666 6

. 48500 5

, . i ] ; . , I I i, I / i I.'., / ,/, //'J,'/" /

k--- e-- _--- _ -'---_..... _-- ' " I / 90., I T-T 1 , . /1 , ', ' 4 _-_--- tl LI. _.-[, , -" _ _ _ ,8_o._

--_-._T-T,,_--r--r--r- _ i "i." / _/t/, "" / /9011|I05 ....4---+--}---_---_......_ i i " -, #'7 " I -48_0._

_ ' ' I 1 i ' -/_/ //' "" /" " " J--,-_-+-JP-I ! _ , I ,..,:-.-,,.-,/,, / I/ '' ' i I l , i I I 1_ "/ ,'.. X/ / / / " /_ -48100.5

q0o07o28 --_.--_-. I _............ :- ,: ,. , - / r " / l #,,.,, T-T--FT.>_..,t., _,:./, -¢ IL-_i I •• , !- ,T-T-q-Vr l J. [.....I,J ,t" , .__hl//_ _ .,,_ooo.

_,,o,,,,_T T-_[LT_-I-Fi_!,"I,._,:K,I..'HI; ,./_.,._/,_.,"___Lr ,,o.,o,o,,__ ,-T x iI T I_ 1,_.,,x ,f X.,k: _, _1/.//;/, ,,o. 8

'" 1i o_,,,,,o,o,-- -T 3h"/f J:,'1,X, i :i_--Y.,_'/Y,'/ o

...._ _.__--1l_,1/_L,.._T_..Z!__J_.,_Ff__._._I__I_L.L/(/(/,,o. ,woo.,..,5>- -___i_-__/fb%.;__A _ __,.._!,.;_Dmmi_,+!,__oo.=_ o _ -- .... V ,_oo_

0,,,,,,o,....T-T-]-/Tv'IAM,"tl.fJZ!k"_'-'</ai_../C_P'i_V..._../Y/,:.J.., =

...... _ -v : x_',' , _..:#;;r----_ '." _ ...... 47300.ao0o_nl9_ I I _ lk !.:_" .._IF/ZI/i "-/ I ; ! / / /_

- • • ',, I -_- l- " _]" [_ v Z ,I l 1 # l l

L 1 "I-_ l_.'i'l; _.1 .." lJ__l.._!l!. !_ _"

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----t-----'t" _ 0 -" " " _" l • 11 Vll# ! ii_,, .- - J_[ll\ P',.l I 1 --v " ' ; / r:_?"l.,, ....... -,._, ,_.- L.... ,,,_oo._

8"n_,oi --_----1 ,6Z.lkkl\,,1,,.,.T.q_q-q /i ,.I/V/ _ _ ll.

• _ l + .............. , _ 47000 587_ov_24 , t . , _ -I" _"._m_,----':l___ ;/- -" !' ' / 9=--'I_ I I I _ . j t- -_ + -,1- --i - "1"" _,,_lll__,_liml_'_ 7

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- _ _ - .0 0 0 0 0 0 0 0 0

LAUNCH DATE

u v

LAUNCH _D-2400000,0

N

.... i ,i ...... iii llill - . . i II I , ,d,.' /ml .......... "m ,_lii.U" ........................ ..................... --......

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1983010504-062

U

r,

1983010504-063

M

,1

I ...... I

............ • ,.,r ., .. . , ....

1983010504-064

ORIGINALPAGE _ 8.OF POOR QUALITY ZAPS

1986EARIH - 3UPITER 1986 , C3L , ZAPS• _,ALL[J'i: Tr-Pr,:rEr- ..';_AjE,]TO_-<

6_ d66c1 6 6

9ll_lOl .... __..-, .... .--- _; 48500.5, ' I , I I I

......--:--, ; i _-_-¢--V-4-.-r-r .- -:- !/:.-. / l.- t--_, ' i ! l i _/ I I i I ; j i ,".¢' b'///., X l ,

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---+--t- ,_ t t f t t t t i t ; Y . v,- ;,:/ / l.,q, i. , I l , ; " / L" ' A. , . . I , . I , I I _ ,'l/ A/X/_I/ .

9,,o2,1s ' i ; 1, ! i i ! I l l.l _,,f Y/I/Y/..4 .-d,sJ/i ....... ' , -- t I I 1 I ; lr • /! - 48300.5

. , l 1 , _ ..... _--L _ _ _ LL_i I L_[_IvF !/./,s,'_'/I/ I_--_ .... --_'_"- ......... "1 " . :- -, /- - : ;-" :, A "48200.5: i I I I I I I . /, ."b'.4." L/ L/ .fi l /I M- t , I i 1 ! " /I "//" , / "

9010"/128 --I'---'_ _ "t t t , , , .- .... -..... .A" V _ I ._o,_ i,t "48100.5i I I I --I ylf wx/y./_., ,1 ,/- .LJ.LL_I; " i , ' , - . .- ..../', i. - < 'ii, i, Ill! L.'Vl.,;k/1.J,I"I/'I/×'-II/ZI._ll .,oooo.s

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-_VA/_/I /IIL_ J¢_/I/lA//#/_ I/Y__ __,mil.,,i .F,,_.1-v l/v i/:/_ _-"/I

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LRUNCH DRTE

L_UNCH JD-2_O0000.O

1983010504-065

SO

ii

1983010504-066

W

1983010504-067

I10

............. _ •, "ll

._ .. _r,mmm_..=.l-..

1983010504-068

c_=_ _'PJ-I _

Earth to Jupiter

1987

Opportunity

ENERGY MINIMA

OEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

I

C3L I /'9.191 I 87/07/05 90/01/22

C3L 79.818 II 87/07/G3 90/02/22

VHP 5.6228 I 87/07/03 90/01/19

VHP 5.6319 II 87/06/30 90/02/01

|1

1983010504-069

9210612"1 48800.5

F41L

D

1983010504-070

• .......... ,_ ...... . I II ........ , r , .............

Ilmm_ ........ .........i

1983010504-071

_4

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1983010504-072

m

ORIGINAL PI:t;'j_. "".• ZALSOF POORqu_,._

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1983010504-073

II

1983010504-074

17

.............._, .._ ...... .u -s

, _ ,"

1983010504-075

7. ORIGn_-PAO!IIRAP o,:_ _rn'.

1987EARTH - JUPITER 1987 , C3L , RAP* BALL IST IC TI_ANSFE_ TI_AJECTOI_Y

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! i ! I I ' /r/ ,r/;/., /r/.i i i I J L // ill/l/ /_,i I' L I ! =,, .',r ///,/,/ /,,;__

91112110 • i . , i "_ " ' " / ....... -4_00.5n ' , _ i , , ,,// 4,A/J/yI / i /,_'o ,_o._.4__._._x___l__,l , ,,, . ,,. ,, _ ., I<.';,'"o. -

, I • I I 1 =_- A/ ."//d,/I/l V ',i',l:,, .,. .'.-'-" ...."- I/'_ -:_9L10910! : ! _ , /" l" i,'I / X T 1 /1 . ";/'i 140. -48500.5l I i l 4 /I '/i/ /m/l ,, / /_ll, lt.., /

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ORIGINALPAGE ISOF POOR QUALrI_.

Earth to Jupiter

1988 i

Opportunity

ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 83.916 I 88/08/05 90/09/2_

C3L 90.018 II 88/08/17 92/02/21

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ORIQINAL PAGE

OFPoor QUALr_

Earth to Jupiter

1989

Opportunity

ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 89.199 I 89/09/09 91/09/29

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LAUNCH DATEi •

47720.5 477b0.5 47860.5 47840.5LAUNCH JD-2400000.0

N

1983010504-101

i

: ZAPE _ e_E,.__1: (_ plxll Qul_nrY

1989 EARTH - <JUPITER 1989 , C3L , ZRPE• i_,_lt_i-.lI,- I_HN:FEP T_'AjE,TT,._;'Y

-- e _I_ aD e --

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1983010504-102

J

lie

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1983010504-103

N

|

1983010504-104

ORIGIPtALr,_---,+

OF POOR gUAL;-,_;

Earth to Jupiter

1990

Opportunity

ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 91.572 I 90/10/12 92/11/03

C3L 84.731 II 90/11/11 95/04/16• i ,i

VHP 5.4517 I 90/10/30 93/07/30

VHP 5.4325 II 90/09/28 93/08/11

In

I

1983010504-105

92103119 " 40700 ._

9to 12otO 14_"

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I

9t 10910| [ 48fJO0. _

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,._NCHJO-_,O0000.O

lie

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1983010504-106

_l

1983010504-107

1oo

l_F_R_ln._n__ln_

101

1983010504-109

Q

onllu¢ P/IoF Quuw DAP

1990ERRTH - JUPT TER _990 C3L , oiqP'_ f.",_t I. [ :..T[, Ti-.*4.4:.FF"_ T_;_,jt , T,'IPY

...... ._ _ ¢'_ ,r' _ -0 0 OOO0 C .......... 0

...... T', " r . 1. • 1 ,t". . _ ,_ . ,96101118 ' , : I , , ] t - -T .......... --r-, .... -..... 71 '50100.5

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1@3

1983010504-111

1

RAP om=._PAGEIllOERX)RqNJJcrl_

1990EARTH - JUPITER 1990 , C3L , RAP

BALLISTIC T_ANSFEI_ TI_AJECI0_Y

,0 ir'i M il_(_'_D I-- I-- _:ii%li'i 0ell -- O'ooi' io _i iIO'o'

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95110110 i /IiI f" /Vll FI lh#I/Ixl "_ II 140.

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LAUNCH DATEI--'-- i • _

48120.5 48160.5 48200.5 48240.5LAUNCH ,.1'D-2400000.0

1983010504-112

,__.= 8.__ ZAPS

1990EARTH - JUPITER 1900 , C3L , ZAPS

BALLISTIC T_ANSFER TRAJECTORY

6 6 6666 6 ._..._. _. ._.6

"'°"" i !i I 1 1 I "t×;_//'//,'<""i 1.4///,"/ _o_oo.,, .,_ IX, ," / _

I l [ ! I I /,I,'/,'//I'//A'5" ,?_Y/Z.'-" 5000o.5

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i _ ,," _ T." 160.

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I

1983010504-113

95/03124 • 49800.5

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94 I09105 •49600.5

094/05/28 -49500.5 -

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94/02/17 49400.5 000 _t

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93/08/0t 49200.5 _J

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1983010504-114

107

1983010504-115

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911_101 48500.5

:_8 i 8-_._.__- _LAUNCH DATE

48120.5 48z60.5 _8a00.5 48_40.5L_UNCH JD-_400OO0,O

' 1983010504-116

OIII_AL P_ SC)[:pOOR QUAUTY

Earth to Jupiter

1991

Opportunity

SNERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 89.738 I 91/11/12 93/12/30

C3L 80.682 II 91/11/30 95/10/16

VHP 5.5057 I 91/11/28 94/09/06

VHP 5.5068 II 91/10/30 94/09/16

1N

l

1983010504-117

I. amajeLPJ IoC3L oF_ Qu_

1991 EARTH- dUP[TER 1991 , C3L , TC-L, BALLISTIC TRANSFER TRAJECTORY

......... _ In0

9"7/02/2! "50500.5

96111113 • 50400.5

96108705 • _0300.5

96101! 18 50100.5

951101I0 -- 50000.5

09510"1102 49900.5 0

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95103124 49800.5 0O

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93108101 ,49200.5

93104123 "49100.5

93101113 .49000.5

92_10105 •48900.5

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LAUNCH DATEI / -- - - • " v

48515.5 48555.5 48595.5 48635.5LAUNCH JO-2400000.O

110

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1983010504-118

111

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1983010504-119

113

1983010504-120

11_1

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1983010504-121

Illl

1983010504-122

116

" 1983010504-123

7. oiiIG,IHAL PAGE liRAP oepooeOuA,.v

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1991 EnRTH- JUPITER 1991 , C3L , nnP

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1983010504-124

117

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1983010504-125

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1991 EARTH- JUPITER 1991 , C3L , ZnPE

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LAUNCH D_TE

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111

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1983010504-126

119

|

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1983010504-127

I10

|

1983010504-128

ORIGINALPAGEIIOF POORQUALITY

Earth to Jupiter

Opportunity

ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 83.478 I 92/12112 95104113

C3L 76,865 II 92112119 96/03/20

VHP 5.6007 I 92/12/21 95109/25r

VHP 5.6132 II 92/12103 95/10/04

121

1983010504-129

122

I

1983010504-130

,+

Ill3

1983010504-131

114

1983010504-132

1211

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1983010504-133

5. o_L PAE IIVHP OFpoor_,_rn'.

1992/3ERRTH - JUPITER 1992/3 C3L , VHP* f_AL_i:.Ti: TF,'C_N-_PE_Ti.,':::IjE,[T0i_'Y

6 6 6 6 "].

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1993/4

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ENERGY MINIMA

DEPARTURE ARRIVALV_,;.UE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 75.558 I 94/01108 96/06/09

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1994/5

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ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 78.594 I 95/02/09 97/03/17

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1996

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ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

I

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Earth to Jupiter

1997

Opportunity

ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 84.420 I 97/04/22 99/03/29i i

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1998

Opportunity

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1999

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1983010504-209

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ZAPE,,. _.e_,_ _sQUALITY/'_ OFPOOR

1999EARTH - JUPITER 1999 , C3L , ZFIPE* BALLISTIC TRANSFE_ TRAJECTOI_Y

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1983010504-211

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Ii

1983010504-212

ORIGINALPAGEiSOF POORQUALITY

Earth to Jupiter

2000

Opportunity

ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) YEAR/MONTH/DAY)

C3L 84.783 I 2000/08/10 2002/09/22

C3L 90.349 II 2000/08/26 2004/05/12

VHP 5.5036 I 2000/08/27 2003/04/04

VHP 5.4694 II 2000/08/01 2003/04/15

m

1983010504-213

lm

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2OO0EARTH - JUPITER 2000 , C3L , TFL

, BALLISTIC TRANSFER TRAJECTORY

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o5/08/t8 53000.5

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1983010504-214

A

1983010504-215

11

RLA o.,_.ALpAot_( OFpOOROU_r_

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1983010504-216

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1983010504-219

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1983010504-220

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1983010504-222

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1983010504-223

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1983010504-224

ORIGINALPAGE13OF POORQUALITY

Earth to Jupiter

2001

Opportunity

ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 89.741 I 2001/09/14 2003/10/03

C3L 88.063 II 2001/10/23 2006/07/29

VHP 5.4502 I 2001110/03 2004/06/12

VHP 5.4169 II 2001/09/01 2004/06/24

217

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1983010504-225

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1983010504-231

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1983010504-232

1

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OnmHALPA_ JSOF pOORQU_nY

Earth to Jupiter

2002

Opportunity

ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 91.575 I 2002/10/16 2004/11/09

C3L 84.166 II 2002/11/13 2007/03/24

VHP 5.4559 I 2002/11/04 2005/08/06m

VHP 5.4395 II 2002/10/02 2005/08/17

2;m

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1983010504-237

I

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1983010504-248

ORIGINALPAGE ISOF POOR QUALIfy

Earth to Jupiter

2003/4

Opportunity

ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 89.129 I 2003/11/16 2006/01/10

C3L 80.127 II 2003/12/03 2007/09/19, IL

VHP 5.516R I 2003/12/01 2006/09/10b, ii i l l e

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1983010504-249

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ORIGINAL PAGE IS, OF POOR QUALITY

Earth to Jupiter

2004/5

Opportunity

ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 82.238 I 2004/12/17 2007/05/101

C3L 76.407 II 2004/12/21 2008/02/15

VHP 5.6158 I 2004/12/24 2007/09/27

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1983010504-261

1983010504-262

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1983010504-271

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!1

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Earth to Jupiter

200516

Opportunity

ENERGY MINIMA

DEPARTURE ARRIVALVALUE TYPE (YEAR/MONTH/DAY) (YEAR/MONTH/DAY)

C3L 75.683 I 2006/01/12 2006/05/19

C3L 79.222 II 2006/01/12 2008/11/12t

VHP 5.8037 I 2006101125 2008109116

VHP 5.7668 II 2006/01/09 2008/09/25

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1983010504-273

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1983010504-282

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1983010504-284