Source Code

These source-code files were from the printout at the MIT Museum, with many thanks to Deborah Douglas, the Museum's Curator of Science and Technology, for releasing it to us. The printout was digitally photographed by Paul Fjeld. A team of volunteers transcribed the source code manually from these images or, where appropriate, modified already-transcribed but similar source Colossus 249 (Apollo 9) source code to agree with the images from the printout. Note that the page images presented online are of reduced quality, and that higher-quality images are available. Report any conversion errors or legibility problems in page images to info@sandroid.org. Notations on the program listing read, in part:

	GAP:  ASSEMBLE REVISION 055 OF AGC PROGRAM COMANCHE BY NASA 2021113-051
	10:28 APR.  1,1969
Note that the date is the date of the printout, not the date of the program revision.

037318,000002:                                                                                                  ## Copyright:   Public domain.
037319,000003:                                                                                                  ## Filename:    ENTRY_LEXICON.agc
037320,000004:                                                                                                  ## Purpose:     Part of the source code for Comanche, build 055. It
037321,000005:                                                                                                  ##              is part of the source code for the Command Module's
037322,000006:                                                                                                  ##              (CM) Apollo Guidance Computer (AGC), Apollo 11.
037323,000007:                                                                                                  ## Assembler:   yaYUL
037324,000008:                                                                                                  ## Reference:   pp. 837-843
037325,000009:                                                                                                  ## Contact:     Ron Burkey <info@sandroid.org>
037326,000010:                                                                                                  ## Website:     http://www.ibiblio.org/apollo.
037327,000011:                                                                                                  ## Mod history: 2009-05-12 RSB  Adapted from Colossus249 file of the same
037328,000012:                                                                                                  ##                              name and Comanche 055 page images.
037329,000013:                                                                                                  ##              2016-12-11 RSB  Proofed comments with octopus/ProoferComments
037330,000014:                                                                                                  ##                              and fixed the errors found.
037331,000015:                                                                                                  ##              2017-01-08 RSB  Fixed comment errors detected in cross-diff vs
037332,000016:                                                                                                  ##                              Colossus 249.
037333,000017:                                                                                                  ##              2017-01-22 RSB  Fixed comment errors detected in cross-diff vs
037334,000018:                                                                                                  ##                              Artemis 72.
037335,000019:                                                                                                  ##
037336,000020:                                                                                                  ## The contents of the "Comanche055" files, in general, are transcribed 
037337,000021:                                                                                                  ## from scanned documents. 
037338,000022:                                                                                                  ##
037339,000023:                                                                                                  ##       Assemble revision 055 of AGC program Comanche by NASA
037340,000024:                                                                                                  ##       2021113-051.  April 1, 1969.  
037341,000025:                                                                                                  ##
037342,000026:                                                                                                  ##       This AGC program shall also be referred to as Colossus 2A
037343,000027:                                                                                                  ##
037344,000028:                                                                                                  ##       Prepared by
037345,000029:                                                                                                  ##                       Massachusetts Institute of Technology
037346,000030:                                                                                                  ##                       75 Cambridge Parkway
037347,000031:                                                                                                  ##                       Cambridge, Massachusetts
037348,000032:                                                                                                  ##
037349,000033:                                                                                                  ##       under NASA contract NAS 9-4065.
037350,000034:                                                                                                  ##
037351,000035:                                                                                                  ## Refer directly to the online document mentioned above for further
037352,000036:                                                                                                  ## information.  Please report any errors to info@sandroid.org.
037353,000037: 

Page 837

037355,000039:                                                                                                  #  VARIABLE      DESCRIPTION                             MAXIMUM VALUE *         COMPUTER NAME
037356,000040:                                                                                                  #  --------      -----------                             ------- -----           -------- ----
037357,000041:                                                                                                  #  -
037358,000042:                                                                                                  #  URT0          INITIAL TARGET VECTOR                   2 (UNIT VECTOR)         = RTINIT
037359,000043:                                                                                                  #  -
037360,000044:                                                                                                  #  UZ            UNIT VECTOR NORTH                       1                       = UNITW
037361,000045:                                                                                                  #  -
037362,000046:                                                                                                  #  V             VELOCITY VECTOR                         2 VSAT                  = VEL
037363,000047:                                                                                                  #  -
037364,000048:                                                                                                  #  R             POSITION VECTOR                         2 EXP 29 METERS         = RN
037365,000049:                                                                                                  #  -
037366,000050:                                                                                                  #  VI            INERTIAL VELOCITY                       128 M/CENTISEC          = VN
037367,000051:                                                                                                  #  -
037368,000052:                                                                                                  #  RTE           VECTOR EAST AT INITIAL TARGET           2                       = RTEAST
037369,000053:                                                                                                  #  -
037370,000054:                                                                                                  #  UTR           NORMAL TO RTE AND UZ                    2                       = RTNORM
037371,000055:                                                                                                  #  -
037372,000056:                                                                                                  #  URT           TARGET VECTOR                           2                       = RT
037373,000057:                                                                                                  #  -
037374,000058:                                                                                                  #  UNI           UNIT NORMAL TO TRAJECTORY PLANE         2       
037375,000059:                                                                                                  #  -
037376,000060:                                                                                                  #  DELV          INTEGRATED ACCEL. FROM PIPAS            5.85 16384 CM/S
037377,000061:                                                                                                  #  -
037378,000062:                                                                                                  #  G             GRAVITY VECTOR                          128 M/CENTISEC          = GDT/2
037379,000063: 
037380,000064:                                                                                                  #  A0            INITIAL DRAG FOR UPCONTRL               805 FPSS                FPSS=FT/SEC/SEC
037381,000065: 
037382,000066:                                                                                                  #  AHOOKDV       TERM IN GAMMAL CALC. = AHOOK DVL        16
037383,000067: 
037384,000068:                                                                                                  #  A1            DRAG VALUE IN FACTOR CALCULATION        805 FPSS
037385,000069: 
037386,000070:                                                                                                  #  ALP           CONST FOR UPCONTRL                      1
037387,000071: 
037388,000072:                                                                                                  #  ASKEP         KEPLER RANGE                            21600 NM                NM = NAUTICAL MILE
037389,000073: 
037390,000074:                                                                                                  #  ASP1          FINAL PHASE RANGE                       21600 NM
037391,000075: 
037392,000076:                                                                                                  #  ASPUP         UP-RANGE                                21600 NM
037393,000077: 
037394,000078:                                                                                                  #  ASP3          GAMMA CORRECTION                        21600 NM
037395,000079: 
037396,000080:                                                                                                  #  ASPDWN        RANGE DOWN TO PULL-UP                   21600 NM
037397,000081: 
037398,000082:                                                                                                  #  ASP           PREDICTED RANGE                         21600 NM                NOT STORED
037399,000083: 
037400,000084:                                                                                                  #  COSG          COSINE(GAMMAL)                          2                       = COSG/2
037401,000085: 
037402,000086:                                                                                                  #  C/D0          RECIPROCAL DRAG, -4/D0 B-8              64/FPSS
037403,000087: 
037404,000088:                                                                                                  #  D             TOTAL ACCELERATION                      805 FPSS
037405,000089: 
037406,000090:                                                                                                  #  D0            CONTROLLED CONSTANT D                   805 FPSS
037407,000091: 
037408,000092:                                                                                                  #  DHOOK         TERM IN GAMMAL COMPUTATION              805 FPSS
037409,000093: 
037410,000094:                                                                                                  #  DIFF          THETNM-ASP (RANGE DIFFERENCE)           21600 NM
037411,000095: 
037412,000096:                                                                                                  #  DIFFOLD       PREVIOUS VALUE OF DIFF                  21600 NM
037413,000097: 
037414,000098:                                                                                                  #  DLEWD         CHANGE IN LEWD                          1
037415,000099: 
037416,000100:                                                                                                  #  DR            REFERENCE DRAG FOR DOWNCONTROL          805 FPSS                NOT STORED
037417,000101: 
037418,000102:                                                                                                  #  DREFR         REFERENCE DRAG                          805 FPSS                NOT STORED
037419,000103: 
037420,000104:                                                                                                  #  DVL           VS1-VL                                  2 VSAT
037421,000105: 
037422,000106:                                                                                                  #  E             ECCENTRICITY                            4                       NOT STORED
037423,000107: 
037424,000108:                                                                                                  #  F1            DRANGE/D DRAG   (FINAL PHASE)           2700/805                = FX +5
037425,000109: 
037426,000110:                                                                                                  #  F2            DRANGE/D RDOT   (FINAL PHASE)           2700/2VS NM/FPS         = FX +4

Page 838

037428,000112: 
037429,000113:                                                                                                  #  F3            DRANGE/D (L/D)                          2700 NM                 = FX
037430,000114: 
037431,000115:                                                                                                  #  FACT1         CONST FOR UPCONTRL                      805 FPSS
037432,000116: 
037433,000117:                                                                                                  #  FACT2         CONST FOR UPCONTRL                      1/805 FPSS
037434,000118: 
037435,000119:                                                                                                  #  FACTOR        USED IN UPCONTRL                        1                       * MAXIMUM VALUE DENOTES UNSCALED
037436,000120:                                                                                                  #                                                                
037437,000121:                                                                                                  #  GAMMAL        FLIGHT PATH ANGLE AT VL                 1 RADIAN                  VARIABLE VALUE WHEN SCALED
037438,000122: 
037439,000123:                                                                                                  #  GAMMAL1       SIMPLE FORM OF GAMMAL                   1 RADIAN                  VARIABLE HAS MAXIMUM VALUE OF ONE.
037440,000124: 

Page 839

037442,000126:                                                                                                  #  VARIABLE      DESCRIPTION                             MAXIMUM VALUE           COMPUTER NAME
037443,000127:                                                                                                  #  --------      -----------                             ------- -----           -------- ----
037444,000128: 
037445,000129:                                                                                                  #  HEADSUP       INDICATOR FOR INITIAL ROLL              1
037446,000130: 
037447,000131:                                                                                                  #  KA            DRAG TO LIFT UP IF DOWN                 805 FPSS                = KAT
037448,000132: 
037449,000133:                                                                                                  #  KLAT          LATERAL SWITCH GAIN                     1                       (NOM = .0125)
037450,000134: 
037451,000135:                                                                                                  #  K2ROLL        INDICATOR FOR ROLL SWITCH               
037452,000136: 
037453,000137:                                                                                                  #  LAD           MAX L/D (MIN ACTUAL VEHICLE L/D)        1
037454,000138: 
037455,000139:                                                                                                  #  LADPAD        NOMINAL VEHICLE L/D, SP PAD LOAD        1                       (NOM = 0.3)
037456,000140: 
037457,000141:                                                                                                  #  LATANG        LATERAL RANGE                           4 RADIANS
037458,000142: 
037459,000143:                                                                                                  #  LEQ           EXCESS C.F. OVER GRAV=(VSQ-1)GS         128.8 FPSS
037460,000144: 
037461,000145:                                                                                                  #  LEWD          UPCONTROL REFERENCE L/D                 1
037462,000146: 
037463,000147:                                                                                                  #  LOD           FINAL PHASE L/D                         1                       (NOM = 0.18)
037464,000148: 
037465,000149:                                                                                                  #  LODPAD        FINAL PHASE L/D, SP PAD LOAD            1
037466,000150: 
037467,000151:                                                                                                  #  L/D           DESIRED LIFT TO DRAG RATIO              1
037468,000152:                                                                                                  #                (VERTICAL PLANE)
037469,000153:                                                                                                  #  
037470,000154:                                                                                                  #  L/D1          TEMP STORAGE FOR L/D IN LATERAL         1
037471,000155: 
037472,000156:                                                                                                  #  L/DCMINR      LAD COS(15DEG)                          1                       (NOM = 0.2895)
037473,000157: 
037474,000158:                                                                                                  #  PREDANGL      PREDICTED RANGE (FINAL PHASE)           2700 NM                 = PREDANG
037475,000159: 
037476,000160:                                                                                                  #  Q2            FINAL PHASE RANGE -23500 Q3             21600 NM
037477,000161:                                                                                                  #                Q2 = FCN(LAD)
037478,000162: 
037479,000163:                                                                                                  #  Q7            MINIMUM DRAG FOR UPCONTROL              805FPSS
037480,000164: 
037481,000165:                                                                                                  #  RDOT          ALTITUDE RATE                           2 VSAT
037482,000166: 
037483,000167:                                                                                                  #  RDOTREF       REFERENCE RDOT FOR UPCONTROL            2 VSAT
037484,000168: 
037485,000169:                                                                                                  #  RDTR          REFERENCE RDOT FOR DOWNCONT             2 VSAT                  NOT SAVED
037486,000170: 
037487,000171:                                                                                                  #  ROLLC         ROLL COMMAND                            1 REVOLUTION
037488,000172: 
037489,000173:                                                                                                  #  RTOGO         RANGE TO GO (FINAL PHASE)               2700 NM                 = FX +2
037490,000174: 
037491,000175:                                                                                                  #  SL            SINE OF LATITUDE                        1                       NOT SAVED
037492,000176: 
037493,000177:                                                                                                  #  T             TIME                                    B 28 CENTISEC           = TIME2,TIME1
037494,000178: 
037495,000179:                                                                                                  #  THETA         DESIRED RANGE (RADIANS)                 2 PI RADIANS            = THETAH
037496,000180: 
037497,000181:                                                                                                  #  THETNM        DESIRED RANGE (NM)                      21600 NM                NON EXISTENT
037498,000182: 
037499,000183:                                                                                                  #  V             VELOCITY MAGNITUDE                      2 VSAT
037500,000184:                                                                                                  #  
037501,000185:                                                                                                  #  V1            INITIAL VELOCITY FOR UPCONTROL          2 VSAT
037502,000186: 
037503,000187:                                                                                                  #  VL            EXIT VELOCITY FOR UPCONTROL             2 VSAT
037504,000188: 
037505,000189:                                                                                                  #  VREF          REFERENCE VELOCITY FOR UPCONTROL        2 VSAT
037506,000190: 
037507,000191:                                                                                                  #  VS1           VSAT OR V1, WHICHEVER IS SMALLER        2 VSAT
037508,000192:                                                                                                  #                  2     2
037509,000193:                                                                                                  #  VBARS         VL /VSAT                                4
037510,000194:                                                                                                  #                                           2     2
037511,000195:                                                                                                  #  VSQ           NORMALISED VEL. SQUARED = V /VSAT       4                       = VSQUARE
037512,000196: 
037513,000197:                                                                                                  #  WT            EARTH RATE TIMES TIME                   1 REVOLUTION            NOT SAVED
037514,000198:                                                                                                  #                                                                                = WIE (DTEAROT)
037515,000199:                                                                                                  #  X             INTERMEDIATE VARIABLE IN G-LIMITER      2 VSAT                  NOT SAVED
037516,000200: 
037517,000201:                                                                                                  #  Y             LATERAL MISS LIMIT                      4 RADIANS               NOT SAVED
037518,000202: 

Page 840

037520,000204:                                                                                                  #  EXTRA COMPUTER ERASABLE LOCATIONS NOT SHOWN ON FLOW CHARTS
037521,000205:                                                                                                  #  -----------------------------------------------------------
037522,000206: 
037523,000207:                                                                                                  #  VARIABLE      DESCRIPTION                             MAXIMUM VALUE
037524,000208:                                                                                                  #  --------      -----------                             ------- -----
037525,000209: 
037526,000210:                                                                                                  #  GOTOADDR      ADDRESS SELECTED BY SEQUENCER
037527,000211: 
037528,000212:                                                                                                  #  XPIPBUF       BUFFER TO STORE X PIPA COUNTS
037529,000213: 
037530,000214:                                                                                                  #  YPIPBUF       BUFFER TO STORE Y PIPA COUNTS
037531,000215: 
037532,000216:                                                                                                  #  ZPIPBUF       BUFFER TO STORE Z PIPA COUNTS
037533,000217: 
037534,000218:                                                                                                  #  PIPCTR        COUNTS PASSES THRU PIPA READ ROUTINE
037535,000219: 
037536,000220:                                                                                                  #  JJ            INDEX IN FINAL PHASE TABLE LOOK-UP
037537,000221: 
037538,000222:                                                                                                  #  MM            INDEX IN FINAL PHASE TABLE LOOK-UP
037539,000223: 
037540,000224:                                                                                                  #  GRAD          INTERPOLATION FACTOR IN FINAL PHASE
037541,000225: 
037542,000226:                                                                                                  #  FX            DRANGE/D L/D = F3                       2700 NM
037543,000227: 
037544,000228:                                                                                                  #  FX +1         AREF                                    805 FPSS
037545,000229: 
037546,000230:                                                                                                  #  FX +2         RTOGO                                   2700 NM
037547,000231: 
037548,000232:                                                                                                  #  FX +3         RDOTREF                                 VSAT/4
037549,000233: 
037550,000234:                                                                                                  #  FX +4         DRANGE/D RDOT = F2                      21600/2VS NM/FPS
037551,000235: 
037552,000236:                                                                                                  #  FX +5         DRANGE/D DRAG = F1                      2700/805 NM/FPSS
037553,000237: 
037554,000238:                                                                                                  #  TEM1B         TEMPORARY LOCATION
037555,000239: 
037556,000240:                                                                                                  #  TIME/RTO      TIME OF INITIAL TARGET RTINIT           B 28 CENTISEC
037557,000241: 
037558,000242:                                                                                                  #  DTEAROT       EST TIME BETWEEN RTINIT AND RT          B 28 CENTISEC
037559,000243:                                                                                                  #  -
037560,000244:                                                                                                  #  UNITV         UNIT V VECTOR                           2
037561,000245:                                                                                                  #  -
037562,000246:                                                                                                  #  UNITR         UNIT R VECTOR                           2
037563,000247:                                                                                                  #   -
037564,000248:                                                                                                  #  -VREL         NEGATIVE VELOCITY REL TO ATMOSP         2 VSAT
037565,000249: 
037566,000250:                                                                                                  #  COMPUTER SWITCHES                                     INITIAL STATE           CM/FLAGS = STATE +6
037567,000251:                                                                                                  #  -------- --------                                     -------------           -------------------
037568,000252: 
037569,000253:                                                                                                  #  ENTRYDSP      DO ENTRY DISPLAY, IF SET                NON-BRANCH (1)          92D, BIT 13
037570,000254:                                                                                                  #  GONEPAST      INDICATES OVERSHOOT OF TARGET           NON-BRANCH (0)          95D, BIT 10
037571,000255:                                                                                                  #  RELVELSW      RELATIVE VELOCITY SWITCH                NON-BRANCH (0)          96D, BIT 9
037572,000256:                                                                                                  #  EGSW          FINAL PHASE SWITCH                      NON-BRANCH (0)          97D, BIT 8
037573,000257:                                                                                                  #  FIRSTPAS      INITIAL PASS THRU HUNTEST               NON-BRANCH (0)          98D, BIT 7
037574,000258:                                                                                                  #  HIND          INDICATES ITERATION IN HUNTEST          NON-BRANCH (0)          99D, BIT 6
037575,000259:                                                                                                  #  INRLSW        INDICATES INIT ROLL ATTITUDE SET        NON-BRANCH (0)          100D, BIT 5
037576,000260:                                                                                                  #  LATSW         INHIBIT DOWNLIFT SWITCH IF NOT SET          BRANCH (1)          101D, BIT 4
037577,000261:                                                                                                  #  .05GSW        INDICATES DRAG EXCEEDS .05 GS               BRANCH (0)          102D, BIT 3
037578,000262: 
037579,000263:                                                                                                  #  GONEBY        INDICATES GONE PAST TARGET (SET)        SELF-INITIALZNG 112D, BIT 8
037580,000264: 

Page 841

037582,000266:                                                                                                  #  CONSTANTS AND GAINS                                                   VALUE
037583,000267:                                                                                                  #  -------------------                                                   -----
037584,000268: 
037585,000269:                                                                                                  #  C1            FACTOR IN ALP COMPUTATION                               1.25
037586,000270:                                                                                                  #  C16           CONSTD GAIN ON DRAG                                     .01
037587,000271:                                                                                                  #  C17           CONSTD GAIN ON RDOT                                     .001
037588,000272:                                                                                                  #  C18           BIAS VEL. FOR FINAL PHASE START                         500     FPS
037589,000273:                                                                                                  #  C20           MAX DRAG FOR DOWN-LIFT                                  175     FPSS
037590,000274:                                                                                                  #  CHOOK         FACTOR IN AHOOK COMPUTATION                             .25
037591,000275:                                                                                                  #  CH1           FACTOR IN GAMMAL COMPUTATION                            1.0
037592,000276:                                                                                                  #  COS15         COS( 15 DEG )                                           .965
037593,000277:                                                                                                  #  DLEWD0        INITIAL VARIATION IN LEWD                               -.05
037594,000278:                                                                                                  #  D2            DRAG TO CHANGE LEWD                                     175     FPSS
037595,000279:                                                                                                  #  DT            COMPUTATION CYCLE TIME INTERVAL                         2       SEC.
037596,000280:                                                                                                  #  GMAX          MAXIMUM ACCELERATION                                    257.6   FPSS    (8 G-S)
037597,000281:                                                                                                  #  KA1           FACTOR IN KA CALC                                       1.3     GS
037598,000282:                                                                                                  #  KA2           FACTOR IN KA CALC                                       .2      GS
037599,000283:                                                                                                  #  KA3           FACTOR IN D0 CALC                                       90 FPSS
037600,000284:                                                                                                  #  KA4           FACTOR IN D0 CALC                                       40 FPSS
037601,000285:                                                                                                  #  KB1           OPTIMIZED UPCONTROL GAIN                                3.4
037602,000286:                                                                                                  #  KB2           OPTIMIZED UPCONTROL GAIN                                .0034
037603,000287:                                                                                                  #  KDMIN         INCREMENT ON Q7 TO DETECT END OF KEPLER PHASE           .5      FPSS
037604,000288:                                                                                                  #  KTETA         TIME OF FLIGHT CONSTANT                                 1000
037605,000289:                                                                                                  #  KLAT1         FACTOR IN KLAT CALC                                     1/24
037606,000290:                                                                                                  #  K44           GAIN USED IN INITIAL ROLL SECTION                       19749550 FPS
037607,000291:                                                                                                  #  LATBIAS       LATERAL SWITCH BIAS TERM                                .41252961 NM
037608,000292:                                                                                                  #  LEWD1         NOMINAL UPCONTROL L/D                                   .15
037609,000293:                                                                                                  #  POINT1        FACTOR TO REDUCE UPCONTROL GAIN                         .1
037610,000294:                                                                                                  #  Q2            FINAL PHASE RANGE - 23500 Q3                            -1002   NM
037611,000295:                                                                                                  #  Q3            FINAL PHASE DRANGE/D V                                  .07     NM/FPS
037612,000296:                                                                                                  #  Q5            FINAL PHASE DRANGE/D GAMMA                              7050    NM/RAD
037613,000297:                                                                                                  #  Q6            FINAL PHASE INITIAL FLIGHT PATH ANGLE                   .0349   RAD
037614,000298:                                                                                                  #  Q7F           MIN DRAG FOR UPCONTROL                                  6       FPSS
037615,000299:                                                                                                  #  Q7MIN         MIN VALUE FOR Q7 IN FACTOR CALCULATION                  40      FPSS
037616,000300:                                                                                                  #  Q19           FACTOR IN GAMMAL1 CALCULATION                           .5
037617,000301:                                                                                                  #  Q21           FACTOR IN Q2 CALCULATION.                               1000    NM
037618,000302:                                                                                                  #  Q22           FACTOR IN Q2 CALCULATION.                               -1302   NM
037619,000303:                                                                                                  #  VFINAL1       VELOCITY TO START FINAL PHASE ON INITIAL ENTRY          27000   FPS
037620,000304:                                                                                                  #  VFINAL        FACTOR IN INITIAL UP-DOWN CALC                          26600   FPS
037621,000305:                                                                                                  #  VLMIN         MINIMUM VL                                              18000   FPS
037622,000306:                                                                                                  #  VMIN          VELOCITY TO SWITCH TO RELATIVE VEL                      VSAT/2
037623,000307:                                                                                                  #  VRCONTRL      RDOT TO START INTO HUNTEST                              700     FPS
037624,000308:                                                                                                  #                VRCONT=COMPUTER NAME
037625,000309:                                                                                                  #  25NM          TOLERANCE TO STOP RANGE ITERATION                       25      NM
037626,000310:                                                                                                  #  VQUIT         VELOCITY TO STOP STEERING                               1000    FPS
037627,000311: 

Page 842

037629,000313:                                                                                                  #  CONVERSION FACTORS AND SCALING CONSTANTS
037630,000314:                                                                                                  #  ---------- ------- --- ------- ---------
037631,000315: 
037632,000316:                                                                                                  #  ATK   ANGLE IN RAD TO NM                                              3437.7468       NM/RAD
037633,000317:                                                                                                  #  GS    NOMINAL G VALUE FOR SCALING                                     32.2            FPSS
037634,000318:                                                                                                  #  HS    ATMOSPHERE SCALE HEIGHT                                         28500           FT
037635,000319:                                                                                                  #  J     GRAVITY HARMONIC COEFFICIENT                                    .00162346       
037636,000320:                                                                                                  #  KWE   EQUATORIAL EARTH RATE                                           1546.70168      FPS
037637,000321:                                                                                                  #  MUE   EARTH GRAVITATIONAL CONSTANT                                    3.986032233 E14 CUBIC M/ SEC SEC
037638,000322:                                                                                                  #  RE    EARTH RADIUS                                                    21202900        FT
037639,000323:                                                                                                  #  REQ   EARTH EQUATORIAL RADIUS                                         20925738.2      FT
037640,000324:                                                                                                  #  VSAT  SATELLITE VELOCITY AT RE                                        25766.1973      FPS
037641,000325:                                                                                                  #  WIE   EARTH RATE                                                      .0000729211505  RAD/SEC
037642,000326: 
037643,000327:                                                                                                  #                (END GSOP AS-278, VOL 1, FIG. 5.6-3 CONSTANTS, GAINS, ETC.)
037644,000328: 
037645,000329:                                                                                                  #  DISPLAY QUANTITIES
037646,000330:                                                                                                  #  ------------------
037647,000331: 
037648,000332:                                                                                                  #  (SEE SECTION 4 OF THE GSOP FOR SIGN CONVENTIONS.)
037649,000333: 
037650,000334:                                                                                                  #  VARIABLE      DESCRIPTION                             MAXIMUM VALUE
037651,000335:                                                                                                  #  --------      -----------                             ------- -----
037652,000336: 
037653,000337:                                                                                                  #  QMAX          PREDICTED MAXIMUM ENTRY ACCEL           163.84 GS       N 60
037654,000338:                                                                                                  #  VPRED         PREDICTED VELOCITY AT ALTITUDE          128 M/CENTISEC  N 60
037655,000339:                                                                                                  #                400K FT ABOVE FISCHER RADIUS.
037656,000340:                                                                                                  #  GAMMAEI       PREDICTED GAMMA AT ALTITUDE             1 REVOLUTION    N 60
037657,000341:                                                                                                  #                400K FT ABOVE FISCHER RADIUS.
037658,000342:                                                                                                  #  D             DRAG ACCELERATION                       805 FPSS        N 64
037659,000343:                                                                                                  #  VMAGI         INERTIAL VELOCITY MAGNITUDE             128 M/CENTISEC  N 64, N 68
037660,000344:                                                                                                  #  THETAH        DESIRED RANGE ANGLE NM                  1 REVOLUTION    N 64, N 67
037661,000345:                                                                                                  #  LAT           PRESENT LATITUDE                        1 REVOLUTION    N 67
037662,000346:                                                                                                  #  LONG          PRESENT LONGITUDE                       1 REVOLUTION    N 67
037663,000347:                                                                                                  #  RTOGO         RANGE ANGLE TO SPLASH FROM              1 REVOLUTION    N 63
037664,000348:                                                                                                  #                EMSALT FT ABOVE FISCHER RADIUS. (IN NM) 
037665,000349:                                                                                                  #  VIO           PREDICTED VELOCITY AT ALTITUDE          128 M/CENTISEC  N 63
037666,000350:                                                                                                  #                EMSALT FT ABOVE FISCHER RADIUS.
037667,000351:                                                                                                  #  TTE           TIME OF FREE FALL TO ALT                B 28 CENTISEC   N 63
037668,000352:                                                                                                  #                EMSALT FT ABOVE FISCHER RADIUS.
037669,000353:                                                                                                  #  ROLLC         ROLL COMMAND                            1 REVOLUTION    N 66, N 68, N 69
037670,000354:                                                                                                  #  LATANG        CROSS-RANGE ERROR (XRNGERR)             4 RADIANS       N 66
037671,000355:                                                                                                  #  DNRNGERR      DOWN RANGE ERROR                        1 REVOLUTION    N 66
037672,000356:                                                                                                  #                (PREDANG - THETAH IN NM)
037673,000357:                                                                                                  #  HDOT          ALTITUDE RATE                           128 M/CENTISEC  N 68
037674,000358:                                                                                                  #  Q7            MINIMUM DRAG FOR UPCONTROL              805 FPSS        N 69
037675,000359:                                                                                                  #  VL            EXIT VELOCITY FOR UP-CONTROL            2 VSAT          N 69
037676,000360: 

Page 843

037678,000362:                                                                                                  #  BODY ATTITUDE QUANTITIES  (CM/POSE)
037679,000363:                                                                                                  #  -----------------------------------
037680,000364: 
037681,000365:                                                                                                  #  VARIABLE      DESCRIPTION                             MAXIMUM VALUE
037682,000366:                                                                                                  #  --------      -----------                             ------- -----
037683,000367:                                                                                                  #   -
037684,000368:                                                                                                  #  -VREL         NEGATIVE VELOCITY REL TO ATMOS.         2 VSAT
037685,000369:                                                                                                  #  -
037686,000370:                                                                                                  #  OLDUYA        USED FOR UYA BELOW 1000 FPS             2
037687,000371:                                                                                                  #  -
037688,000372:                                                                                                  #  UXA/2         UNIT VECTOR TRIAD                       2
037689,000373:                                                                                                  #  -
037690,000374:                                                                                                  #  UYA/2                 BASED ON                        2
037691,000375:                                                                                                  #  -
037692,000376:                                                                                                  #  UZA/2                         THE TRAJECTORY.         2
037693,000377:                                                                                                  #  -
037694,000378:                                                                                                  #  UBX/2         UNIT VECTOR                             2
037695,000379:                                                                                                  #  -
037696,000380:                                                                                                  #  UBY/2                 BODY TRIAD                      2
037697,000381:                                                                                                  #  -
037698,000382:                                                                                                  #  UBZ/2                         FOR CM.                 2
037699,000383: 

End of include-file ENTRY_LEXICON.agc.  Parent file is MAIN.agc