Source Code
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These source-code files are part of a reconstructed copy of Luminary 97, the
second release of the Apollo 11 Lunar Module (LM) Apollo Guidance Computer
(AGC) software. It was created to fix two incorrect ephemeris constants in
Luminary 96, as described by anomaly report LNY-59.
The reconstruction began with source code of Luminary 99 revision 1 previously
transcribed from a digitized copy of that program. The code was then updated
by undoing changes described in original Luminary memos 83 and 85, using asterisks
indicating changed lines in the listing as a guide. The reconstruction was
verified by matching memory-bank checksums to those listed in drawing 2021152D.
Note that page numbers in the reconstructed code match those on the Luminary 099
revision 001 printout, although the added code would likely have changed page
numbers for a real Luminary 97 listing.
Comments from the original source code are prefixed with a single '#' symbol,
whereas comments added later are prefixed by "##" or "###". Report any errors
noted by creating an
issue report at the Virtual AGC
project's GitHub repository.
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030127,000002: ## Copyright: Public domain.
030128,000003: ## Filename: R30.agc
030129,000004: ## Purpose: A section of Luminary revision 97.
030130,000005: ## It is part of the reconstructed source code for the
030131,000006: ## second release of the flight software for the Lunar
030132,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 11.
030133,000008: ## It was created to fix two incorrect ephemeris constants in
030134,000009: ## Luminary 96, as described by anomaly report LNY-59.
030135,000010: ## The code has been recreated from a copy of Luminary 99
030136,000011: ## revision 001, using asterisks indicating changed lines in
030137,000012: ## the listing and Luminary Memos #83 and #85, which list
030138,000013: ## changes between Luminary 97 and 98, and 98 and 99. The
030139,000014: ## code has been adapted such that the resulting bugger words
030140,000015: ## exactly match those specified for Luminary 97 in NASA drawing
030141,000016: ## 2021152D, which gives relatively high confidence that the
030142,000017: ## reconstruction is correct.
030143,000018: ## Reference: pp. 712-722
030144,000019: ## Assembler: yaYUL
030145,000020: ## Contact: Ron Burkey <info@sandroid.org>.
030146,000021: ## Website: www.ibiblio.org/apollo/index.html
030147,000022: ## Mod history: 2019-07-28 MAS Created from Luminary 99.
030148,000023: ## 2021-05-30 ABS TICKTIFF -> TICKTFF
030149,000024:
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Page 712
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030151,000026: # SUBROUTINE NAME: V82CALL
030152,000027: # MOD NO: 0 DATE: 16 FEB 67
030153,000028: # MOD BY: RR BAIRNSFATHER LOG SECTION: R30
030154,000029: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
030155,000030: # MOD NO: 2 MOD BY ALONSO DATE: 11 DEC 67 VB82 PROGRAM REWRITTEN
030156,000031: # MOD NO: 3 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
030157,000032:
030158,000033: # NEW FUNCTIONAL DESCRIPTION: CALLED BY VERB 82 ENTER. PRIORITY 10
030159,000034: # USED THROUGHOUT. CALCULATE AND DISPLAY ORBITAL PARAMETERS
030160,000035:
030161,000036: # 1. IF AVERAGE G IS OFF:
030162,000037: # FLASH DISPLAY V04N06. R2 INDICATES WHICH SHIP'S STATE VECTOR IS
030163,000038: # TO BE UPDATED. INITIAL CHOICE IS THIS SHIP (R2=1). ASTRONAUT
030164,000039: # CAN CHANGE TO OTHER SHIP BY V22EXE, WHERE X NOT EQ 1.
030165,000040: # SELECTED STATE VECTOR UPDATED BY THISPREC (OTHPREC).
030166,000041: # CALLS SR30.1 (WHICH CALLS TFFCONMU + TFFRP/RA) TO CALCULATE
030167,000042: # RPER (PERIGEE RADIUS), RAPO (APOGEE RADIUS), HPER (PERIGEE
030168,000043: # HEIGHT ABOVE LAUNCH PAD OR LUNAR LANDING SITE), HAPO (APOGEE
030169,000044: # HEIGHT AS ABOVE), TPER (TIME TO PERIGEE), TFF (TIME TO
030170,000045: # INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
030171,000046: # FLASH MONITOR V16N44 (HAPO, HPER, TFF). TFF IS -59M59S IF IT WAS
030172,000047: # NOT COMPUTABLE, OTHERWISE IT INCREMENTS ONCE PER SECOND.
030173,000048: # ASTRONAUT HAS OPTION TO MONITOR TPER BY KEYING IN N 32 E.
030174,000049: # DISPLAY IS IN HMS, IS NEGATIVE (AS WAS TFF), AND INCREMENTS
030175,000050: # ONCE PER SECOND ONLY IF TFF DISPLAY WAS -59M59S.
030176,000051: # 2. IF AVERAGE G IS ON:
030177,000052: # CALLS SR30.1 APPROX EVERY TWO SECS. STATE VECTOR IS ALWAYS
030178,000053: # FOR THIS VEHICLE. V82 DOES NOT DISTURB STATE VECTOR. RESULTS
030179,000054: # OF SR30.1 ARE RAPO, RPER, HAPO, HPER, TPER, TFF.
030180,000055: # FLASH MONITOR V16N44 (HAPO, HPER, TFF).
030181,000056: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
030182,000057: # ABOVE REMARKS.
030183,000058:
030184,000059: # CALLING SEQUENCE: VERB 82 ENTER.
030185,000060:
030186,000061: # SUBROUTINES CALLED: SR30.1, GOXDSPF
030187,000062: # MAYBE - THISPREC, OTHPREC, LOADTIME, DELRSPL
030188,000063:
030189,000064: # NORMAL EXIT MODES: TC ENDEXT
030190,000065:
030191,000066: # ALARMS: NONE
030192,000067:
030193,000068: # OUTPUT: HAPOX (-29) M
030194,000069: # HPERX (-29) M
030195,000070: # RAPO (-29) M EARTH
030196,000071: # (-27) M MOON
030197,000072: # RPER (-29) M EARTH
030198,000073: # (-27) M MOON
030199,000074: # TFF (-28) CS CONTAINS NEGATIVE QUANTITY
030200,000075: # -TPER (-28) CS CONTAINS NEGATIVE QUANTITY
030201,000076:
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Page 713
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030203,000078: # ERASABLE INITIALIZATION REQUIRED: STATE VECTOR.
030204,000079:
030205,000080: # DEBRIS: QPRET, RONE, VONE, TFF/RTMU, HPERMIN, RPADTEM, V82EMFLG.
030206,000081: # MAYBE: TSTART82, V82FLAGS, TDEC1.
030207,000082:
030208,000083: 13,2351 E4,1517 EBANK= HAPOX
030209,000084: 31,2144 BANK 31
030210,000085: 22,2000 SETLOC R30LOC
030211,000086: 22,2000 BANK
030212,000087: 22,3242 COUNT* $$/R30
030213,000088:
030214,000089: 22,3242 06037 V82CALL TC INTPRET
030215,000090: 22,3243 52014 BON GOTO
030216,000091: 22,3244 03712 AVEGFLAG
030217,000092: 22,3245 45465 V82GON # IF AVERAGE G ON
030218,000093: 22,3246 45247 V82GOFF # IF AVERAGE G OFF
030219,000094:
030220,000095: 22,3247 77776 V82GOFF EXIT # ALLOW ASTRONAUT TO SELECT VEHICLE
030221,000096: 22,3250 34752 CAF TWO # DESIRED FOR ORBITAL PARAMETERS
030222,000097: 22,3251 55051 TS OPTIONX # CALCULATION AND DISPLAY.
030223,000098: 22,3252 34753 CAF ONE
030224,000099: 22,3253 55052 TS OPTIONX +1
030225,000100: 22,3254 33316 CAF OPTIONVN # V 04 N 06
030226,000101: 22,3255 04616 TC BANKCALL
030227,000102: 22,3256 20334 CADR GOXDSPF
030228,000103: 22,3257 05472 TC ENDEXT # TERMINATE
030229,000104: 22,3260 03262 TC +2 # PROCEED
030230,000105: 22,3261 03254 TC -5 # DATA IN. OPTION1+1 = 1 FOR THIS VEHICLE.
030231,000106: # UNEQ 1 FOR OTHER VEHICLE.
030232,000107: 22,3262 34750 CAF BIT4 # 80 MS
030233,000108: 22,3263 05203 TC WAITLIST
030234,000109: 22,3264 E4,1540 EBANK= TFF
030235,000110: 22,3264 03430 44064 2CADR TICKTEST
030236,000111:
030237,000112: 22,3266 00003 RELINT
030238,000113: 22,3267 33320 V82GOFLP CAF TFFBANK # MAJOR RECYCLE LOOP ENTRY
030239,000114: 22,3270 54003 TS EBANK
030240,000115: 22,3271 34755 CAF ZERO
030241,000116: 22,3272 55537 TS V82FLAGS # ZERO FLAGS FOR TICKTEST. INHIBITS
030242,000117: # DECREMENTING OF TFF AND -TPER.
030243,000118: 22,3273 35021 CAF PRIO7
030244,000119: 22,3274 05105 TC FINDVAC # V82GOFF1 WILL EXECUTE STATE VECTOR
030245,000120: 22,3275 E4,1540 EBANK= TFF # UPDATE AND ORBIT CALCULATIONS FOR
030246,000121: 22,3275 03321 44064 2CADR V82GOFF1 # SELECTED VEHICLE ABOUT PROPER BODY.
030247,000122:
030248,000123: 22,3277 00003 RELINT
030249,000124: 22,3300 36245 V82STALL CAF THREE # STALL IN THIS LOOP AND WITHOLD V 16 N 44
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Page 714
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030251,000126: 22,3301 71537 MASK V82FLAGS # UNTIL STATE VECTOR UPDATE SETS ONE OF
030252,000127: 22,3302 10000 CCS A # OUR FLAG BITS.
030253,000128: 22,3303 03310 TC FLAGGON # EXIT FROM STALL LOOP.
030254,000129: 22,3304 34777 CAF 1SEC
030255,000130: 22,3305 04616 TC BANKCALL
030256,000131: 22,3306 01735 CADR DELAYJOB
030257,000132: 22,3307 03300 TC V82STALL
030258,000133:
030259,000134: 22,3310 33317 FLAGGON CAF V16N44 # MONITOR HAPO,HPER,TFF.
030260,000135: 22,3311 04616 TC BANKCALL
030261,000136: 22,3312 20334 CADR GOXDSPF
030262,000137: 22,3313 05563 TC B5OFF # TERM THIS TELLS TICKTEST TO KILL ITSELF
030263,000138: 22,3314 05563 TC B5OFF # PROCEED DITTO
030264,000139: 22,3315 03267 TC V82GOFLP # RECYCLE RECOMPUTE STATE VECT + DISPLAY
030265,000140:
030266,000141: 22,3316 01014 OPTIONVN VN 412
030267,000142: 22,3317 04054 V16N44 VN 1644
030268,000143: 22,3320 02140 TFFBANK ECADR TFF
030269,000144:
030270,000145: 22,3321 06037 V82GOFF1 TC INTPRET
030271,000146: 22,3322 77634 RTB
030272,000147: 22,3323 21573 LOADTIME
030273,000148: 22,3324 00041 STORE TDEC1 # TIME FOR STATE VECTOR UPDATE.
030274,000149: 22,3325 02205 STORE TSTART82 # TIME FOR INTERNAL USE.
030275,000150: 22,3326 77776 EXIT
030276,000151: 22,3327 41052 CS OPTIONX +1 # 1 FOR THIS VEHICLE, NOT 1 FOR OTHER.
030277,000152: 22,3330 64753 AD ONE
030278,000153: 22,3331 00006 EXTEND
030279,000154: 22,3332 13356 BZF THISSHIP
030280,000155: 22,3333 06037 OTHSHIP TC INTPRET
030281,000156: 22,3334 77624 CALL # CALL STATE VECTOR UPDATE FOR OTHER SHIP.
030282,000157: 22,3335 27043 OTHPREC
030283,000158: 22,3336 77775 BOTHSHIP VLOAD # MOVE RESULTS INTO TFFCONIC STORAGE AREAS
030284,000159: 22,3337 00001 RATT # TO BE CALLED BY SR30.1.
030285,000160: 22,3340 26207 STOVL RONE # RATT AT (-29)M FOR EARTH OR MOON
030286,000161: 22,3341 00007 VATT
030287,000162: 22,3342 02215 STORE VONE # VATT AT (-7)M/CS FOR EARTH OR MOON
030288,000163: 22,3343 77743 DLOAD*
030289,000164: 22,3344 73774 1/RTMUE,2 # X2 IS 0 FOR EARTH CENTERED STATE VEC
030290,000165: 22,3345 00037 STORE TFF/RTMU # X2 IS 2 FOR MOON
030291,000166: 22,3346 77743 DLOAD* # AS LEFT BY THISPREC OR OTHPREC.
030292,000167: 22,3347 72411 MINPERE,2
030293,000168: 22,3350 02201 STORE HPERMIN # TFFRTMU, HPERMIN AND RPADTEM ARE ALL
030294,000169: 22,3351 46135 SLOAD BHIZ # EARTH/MOON PARAMETERS AS SET HERE.
030295,000170: 22,3352 00050 X2
030296,000171: 22,3353 45367 EARTHPAD
030297,000172: 22,3354 77650 GOTO
030298,000173: 22,3355 45373 MOONPAD
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Page 715
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030300,000175: 22,3356 06037 THISSHIP TC INTPRET
030301,000176: 22,3357 77624 CALL # CALL STATE VECTOR UPDATE FOR THIS SHIP.
030302,000177: 22,3360 27057 THISPREC
030303,000178: 22,3361 77650 GOTO
030304,000179: 22,3362 45336 BOTHSHIP
030305,000180:
030306,000181: # THE FOLLOWING CONSTANTS ARE PAIRWISE INDEXED. DO NOT SEPARATE PAIRS.
030307,000182:
030308,000183: 22,3363 00001 11530 MINPERM 2DEC 10668 B-27 # 35 KFT MIN PERIGEE HEIGHT FOR MOON(-27)M
030309,000184:
030310,000185: 22,3365 00002 31230 MINPERE 2DEC 91440 B-29 # 300 KFT (-29)M FOR EARTH
030311,000186:
030312,000187: 22,3367 43145 EARTHPAD DLOAD CLRGO # PAD 37-B RADIUS. SCALED AT (-29)M.
030313,000188: 22,3370 06315 RPAD
030314,000189: 22,3371 03635 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
030315,000190: 22,3372 45377 BOTHPAD
030316,000191:
030317,000192: 22,3373 51575 MOONPAD VLOAD ABVAL # COMPUTE MOON PAD RADIUS FROM RLS VECTOR.
030318,000193: 22,3374 02023 RLS # SCALED AT (-27)M.
030319,000194: 22,3375 77614 SET
030320,000195: 22,3376 03475 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
030321,000196: 22,3377 36203 BOTHPAD STCALL RPADTEM
030322,000197: 22,3400 45551 SR30.1 # CALCULATE ORBITAL PARAMETERS
030323,000198: 22,3401 45234 RTB DSU
030324,000199: 22,3402 21573 LOADTIME
030325,000200: 22,3403 02205 TSTART82 # PRESENT TIME - TIME V82GOFF1 BEGAN
030326,000201: 22,3404 02205 STORE TSTART82 # SAVE IT
030327,000202: 22,3405 53145 DLOAD BZE # SR30.1 SETS -TPER=0 IF HPER L/
030328,000203: 22,3406 02143 -TPER # HPERMIN (300 OR 35) KFT.
030329,000204: 22,3407 45420 TICKTFF # (-TPER = 0)
030330,000205: 22,3410 43345 TICKTPER DLOAD DAD # (-TPER NON ZERO) TFF WAS NOT COMPUTED,
030331,000206: 22,3411 02143 -TPER # BUT WAS SET TO 59M59S. DONT TICK TFF, DO
030332,000207: 22,3412 02205 TSTART82 # TICK -TPER. DISPLAY BOTH.
030333,000208: 22,3413 02143 STORE -TPER # -TPER CORRECTED FOR TIME SINCE V82GOFF1
030334,000209: 22,3414 77776 EXIT # BEGAN.
030335,000210: 22,3415 34753 CAF BIT1
030336,000211: 22,3416 55537 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY -TPER
030337,000212: 22,3417 05155 TC ENDOFJOB
030338,000213:
030339,000214: 22,3420 43345 TICKTFF DLOAD DAD # (-TPER=0) TFF WAS COMPUTED. TICK TFF.
030340,000215: 22,3421 02141 TFF # DO NOT TICK -TPER. DISPLAY TFF, BUT NOT
030341,000216: 22,3422 02205 TSTART82 # -TPER.
030342,000217: 22,3423 02141 STORE TFF # TFF CORRECTED FOR TIME SINCE V82GOFF1
030343,000218: 22,3424 77776 EXIT # BEGAN.
030344,000219: 22,3425 34752 CAF BIT2
030345,000220: 22,3426 55537 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY TFF.
030346,000221: 22,3427 05155 TC ENDOFJOB
030347,000222:
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Page 716
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030349,000224: 22,3430 34747 TICKTEST CAF BIT5 # THIS WAITLIST PROGRAM PERPETUATES ITSELF
030350,000225: 22,3431 71044 MASK EXTVBACT # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
030351,000226: 22,3432 10000 CCS A
030352,000227: 22,3433 03441 TC DOTICK
030353,000228: 22,3434 37713 CAF PRIO25
030354,000229: 22,3435 05072 TC NOVAC # TERMINATE V 82. CANT CALL ENDEXT IN RUPT.
030355,000230: 22,3436 1044 EBANK= EXTVBACT
030356,000231: 22,3436 05472 04062 2CADR ENDEXT
030357,000232:
030358,000233: 22,3440 05261 TC TASKOVER
030359,000234: 22,3441 34777 DOTICK CAF 1SEC # RE-REQUEST TICKTEST.
030360,000235: 22,3442 05203 TC WAITLIST
030361,000236: 22,3443 E4,1540 EBANK= TFF
030362,000237: 22,3443 03430 44064 2CADR TICKTEST
030363,000238:
030364,000239: 22,3445 36245 CAF THREE
030365,000240: 22,3446 71537 MASK V82FLAGS
030366,000241: 22,3447 50000 INDEX A
030367,000242: 22,3450 03451 TC +1
030368,000243: 22,3451 05261 TC TASKOVER # IF NO FLAGBITS SET DONT CHANGE TFF OR
030369,000244: # -TPER, BUT CONTINUE LOOP.
030370,000245: 22,3452 03460 TC TPERTICK # ONLY BIT 1 SET. INCR -TPER BY 1 SEC.
030371,000246: 22,3453 34777 TFFTICK CAF 1SEC # ONLY BIT 2 SET. INCR TFF BY 1 SEC.
030372,000247: 22,3454 54001 TS L
030373,000248: 22,3455 34755 CAF ZERO
030374,000249: 22,3456 21541 DAS TFF
030375,000250: 22,3457 05261 TC TASKOVER
030376,000251: 22,3460 34777 TPERTICK CAF 1SEC
030377,000252: 22,3461 54001 TS L
030378,000253: 22,3462 34755 CAF ZERO
030379,000254: 22,3463 21543 DAS -TPER
030380,000255: 22,3464 05261 TC TASKOVER
030381,000256:
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Page 717
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030383,000258: 22,3465 77776 V82GON EXIT # AVERAGE G ON. USE CURRENT STATE VECTOR
030384,000259: # FOR ORBITAL PARAMETER CALCULATIONS.
030385,000260: 22,3466 35021 CAF PRIO7 # LESS THAN LAMBERT
030386,000261: 22,3467 05105 TC FINDVAC # V82GON1 WILL PERFORM ORBIT CALCULATIONS
030387,000262: 22,3470 E4,1540 EBANK= TFF # ABOUT PROPER BODY APPROX ONCE PER SEC.
030388,000263: 22,3470 03503 44064 2CADR V82GON1
030389,000264:
030390,000265: 22,3472 00003 RELINT
030391,000266: 22,3473 10067 CCS NEWJOB # WITHOLD V16 N44 UNTIL FIRST ORBIT CALC
030392,000267: 22,3474 05122 TC CHANG1 # IS DONE. NOTE: V82GON1 (PRIO7, FINDVAC
030393,000268: # JOB) IS COMPLETED BEFORE V82GON (PRIO7,
030394,000269: # NOVAC JOB).
030395,000270: 22,3475 33317 V82REDSP CAF V16N44 # MONITOR HAPO, HPER, TFF
030396,000271: 22,3476 04616 TC BANKCALL
030397,000272: 22,3477 20334 CADR GOXDSPF
030398,000273: 22,3500 05563 TC B5OFF # TERM THIS TELLS V82GON1 TO KILL ITSELF.
030399,000274: 22,3501 05563 TC B5OFF # PROC DITTO.
030400,000275: 22,3502 03475 TC V82REDSP # RECYCLE
030401,000276:
030402,000277: 22,3503 06037 V82GON1 TC INTPRET # THIS EXEC PROGRAM PERPETUATES ITSELF
030403,000278: # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
030404,000279: 22,3504 52175 VLOAD GOTO # HOLDS OFF CCS NEWJOB BETWEEN RN AND
030405,000280: 22,3505 01221 RN # VN FETCH SO RN, VN ARE FROM SAME
030406,000281: 22,3506 45507 NEXTLINE # STATE VECTOR UPDATE.
030407,000282: 22,3507 26207 NEXTLINE STOVL RONE # RN AT (-29)M FOR EARTH OR MOON
030408,000283: 22,3510 01227 VN
030409,000284: 22,3511 02215 STORE VONE # VN AT (-7)M/CS FOR EARTH OR MOON
030410,000285: 22,3512 52014 BON GOTO
030411,000286: 22,3513 04304 MOONTHIS # FLAG INDICATES BODY ABOUT WHICH ORBITAL
030412,000287: 22,3514 45516 MOONGON # CALCULATIONS ARE TO BE PERFORMED.
030413,000288: 22,3515 45527 EARTHGON # IF SET - MOON, IF RESET - EARTH.
030414,000289:
030415,000290: 22,3516 71214 MOONGON SET DLOAD
030416,000291: 22,3517 03475 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
030417,000292: 22,3520 04001 1/RTMUM # LUNAR PARAMETERS LOADED HERE FOR SR30.1
030418,000293: 22,3521 14037 STODL TFF/RTMU
030419,000294: 22,3522 05364 MINPERM
030420,000295: 22,3523 26201 STOVL HPERMIN
030421,000296: 22,3524 02023 RLS # SCALED AT (-27)M.
030422,000297: 22,3525 52046 ABVAL GOTO
030423,000298: 22,3526 45536 V82GON2
030424,000299: 22,3527 71214 EARTHGON CLEAR DLOAD
030425,000300: 22,3530 03675 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
030426,000301: 22,3531 04003 1/RTMUE # EARTH PARAMETERS LOADED HERE FOR SR30.1
030427,000302: 22,3532 14037 STODL TFF/RTMU
030428,000303: 22,3533 05366 MINPERE
030429,000304: 22,3534 16201 STODL HPERMIN
030430,000305: 22,3535 06315 RPAD
030431,000306: 22,3536 36203 V82GON2 STCALL RPADTEM # COMMON CODE FOR EARTH & MOON.
030432,000307: 22,3537 45551 SR30.1
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Page 718
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030434,000309: 22,3540 77776 EXIT
030435,000310: 22,3541 34747 V82GON3 CAF BIT5
030436,000311: 22,3542 71044 MASK EXTVBACT # SEE IF ASTRONAUT HAS SIGNALLED TERMINATE
030437,000312: 22,3543 00006 EXTEND
030438,000313: 22,3544 15472 BZF ENDEXT # YES, TERMINATE VB 82 LOOP
030439,000314: 22,3545 34777 CAF 1SEC
030440,000315: 22,3546 04616 TC BANKCALL # WAIT ONE SECOND BEFORE REPEATING
030441,000316: 22,3547 01735 CADR DELAYJOB # ORBITAL PARAMETER COMPUTATION.
030442,000317: 22,3550 03503 TC V82GON1
030443,000318:
030444,000319: 22,3551 22,3541 SPLRET = V82GON3
030445,000320:
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Page 719
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030447,000322: # SUBROUTINE NAME: SR30.1
030448,000323: # MOD NO: 0 DATE: 16 FEB 67
030449,000324: # MOD BY: RR BAIRNSFATHER LOG SECTION: R32
030450,000325: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
030451,000326: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 14 APR 67 ADD OVFL CK FOR RAPO
030452,000327: # MOD NO: 3 MOD BY ALONSO DATE: 11 DEC 67 SUBROUTINE REWRITTEN
030453,000328: # MOD NO: 4 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
030454,000329: # MOD NO: 5 MOD BY: RR BAIRNSFATHER DATE: 6 AUG 68 OVFL CK FOR HAPO & HPER. VOIDS MOD #2.
030455,000330:
030456,000331: # NEW FUNCTIONAL DESCRIPTION: ORBITAL PARAMETERS DISPLAY FOR NOUNS 32 AND 44.
030457,000332: # SR30.1 CALLS TFFCONMU AND TFFRP/RA TO CALCULATE RPER (PERIGEE RADIUS),
030458,000333: # RAPO (APOGEE RADIUS), HPER (PERIGEE HEIGHT ABOVE LAUNCH PAD OR LUNAR
030459,000334: # LANDING SITE), HAPO (APOGEE HEIGHT AS ABOVE), TPER (TIME TO PERIGEE),
030460,000335: # TFF (TIME TO INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
030461,000336: # IF HPER IS GREATER THAN OR EQUAL TO HPERMIN, CALCULATES TPER AND STORES
030462,000337: # NEGATIVE IN -TPER. OTHERWISE STORES +0 IN -TPER. WHENEVER TPER IS
030463,000338: # CALCULATED, TFF IS NOT COMPUTABLE AND DEFAULTS TO -59MIN 59SEC. IF HAPO
030464,000339: # WOULD EXCEED 9999.9 NM, IT IS LIMITED TO THAT VALUE FOR DISPLAY.
030465,000340:
030466,000341: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
030467,000342: # ABOVE REMARKS.
030468,000343:
030469,000344: # CALLING SEQUENCE: CALL
030470,000345: # SR30.1
030471,000346:
030472,000347: # SUBROUTINES CALLED: TFFCONMU, TFFRP/RA, CALCTPER, CALCTFF
030473,000348:
030474,000349: # NORMAL EXIT MODE: CALLING LINE +1 (STILL IN INTERPRETIVE MODE)
030475,000350:
030476,000351: # ALARMS: NONE
030477,000352:
030478,000353: # OUTPUT: RAPO (-29) M EARTH APOGEE RADIUS EARTH CENTERED COORD.
030479,000354: # (-27) M MOON MOON CENTERED COORD.
030480,000355: # RPER (-29) M EARTH PERIGEE RADIUS EARTH CENTERED COORD.
030481,000356: # (-27) M MOON MOON CENTERED COORD.
030482,000357: # HAPOX (-29) M APOGEE ALTITUDE ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
030483,000358: # HPERX (-29) M PERIGEE ALT. ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
030484,000359: # TFF (-28) CS TIME TO 300KFT OR 35KFT ALTITUDE
030485,000360: # -TPER (-28) CS TIME TO PERIGEE
030486,000361:
030487,000362: # ERASABLE INITIALIZATION REQUIRED -
030488,000363: # TFF/RTMU (+17) EARTH RECIPROCAL OF PROPER GRAV CONSTANT FOR
030489,000364: # (+14) MOON EARTH OR MOON = 1/SQRT(MU).
030490,000365: # RONE (-29) M STATE VECTOR
030491,000366: # VONE (-7) M/CS STATE VECTOR
030492,000367: # RPADTEM (-29) M EARTH RADIUS OF LAUNCH PAD OR LUNAR LANDING
030493,000368: # (-27) M MOON SITE.
030494,000369: # HPERMIN (-29) M EARTH (300 OR 35) KFT MINIMUM PERIGEE ALTITUDE
030495,000370: # (-27) M MOON ABOVE LAUNCH PAD OR LUNAR LANDING SITE.
030496,000371: # V82EMFLG (INT SW BIT) RESET FOR EARTH, SET FOR MOON.
030497,000372:
030498,000373: # DEBRIS: QPRET, PDL, S2
030499,000374:
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Page 720
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030501,000376: 22,3551 COUNT* $$/SR30S
030502,000377:
030503,000378: 22,3551 44001 SR30.1 SETPD STQ # INITIALIZE PUSHDOWN LIST.
030504,000379: 22,3552 00001 0
030505,000380: 22,3553 00051 S2
030506,000381: # SR30.1 INPUT: RONE AT (-29)M EARTH/MOON
030507,000382: # VONE AT (-7)M/CS
030508,000383: # TFFCONMU, TFFRP/RA, CALCTPER AND CALCTFF
030509,000384: # CALLS REQUIRE:
030510,000385: # EARTH CENTERED (NO RESCALING REQUIRED)
030511,000386: # RONE SCALED TO B-29 M
030512,000387: # VONE SCALED TO B-7 M/CS
030513,000388: # MOON CENTERED (RESCALING REQUIRED)
030514,000389: # RONE SCALED TO B-27 M
030515,000390: # VONE SCALED TO B-5 M/CS
030516,000391: 22,3554 77214 BOFF VLOAD
030517,000392: 22,3555 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
030518,000393: 22,3556 45565 TFFCALLS
030519,000394: 22,3557 02207 RONE
030520,000395: 22,3560 77752 VSL2
030521,000396: 22,3561 26207 STOVL RONE
030522,000397: 22,3562 02215 VONE
030523,000398: 22,3563 77752 VSL2
030524,000399: 22,3564 02215 STORE VONE
030525,000400: 22,3565 77624 TFFCALLS CALL
030526,000401: 22,3566 57361 TFFCONMU
030527,000402: 22,3567 77624 CALL # TFFRP/RA COMPUTES RAPO,RPER.
030528,000403: 22,3570 57427 TFFRP/RA
030529,000404: # RETURNS WITH RAPO IN D(MPAC).
030530,000405: 22,3571 77625 DSU
030531,000406: 22,3572 02203 RPADTEM
030532,000407: 22,3573 64414 BOFF SR2R # NEED HAPO AT (-29)M FOR DISPLAY.
030533,000408: # IF MOON CENTERED, RESCALE FROM (-27)M.
030534,000409: # IF EARTH CENTERED ALREADY AT (-29)M.
030535,000410: 22,3574 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
030536,000411: 22,3575 45576 +1
030537,000412: 22,3576 77624 CALL # IF HAPO > MAXNM, SET HAPO =9999.9 NM.
030538,000413: 22,3577 45636 MAXCHK # OTHERWISE STORE (RAPO-RPADTEM) IN HAPO.
030539,000414: 22,3600 16120 STORHAPO STODL HAPOX
030540,000415: 22,3601 00017 RPER
030541,000416: 22,3602 77625 DSU
030542,000417: 22,3603 02203 RPADTEM # GIVES HPER AT (-29)M EARTH, (-27)M MOON.
030543,000418: 22,3604 00161 STORE MPAC +4 # SAVE THIS FOR COMPARISON TO HPERMIN.
030544,000419: 22,3605 64414 BOFF SR2R # NEED HPER AT (-29)M FOR DISPLAY.
030545,000420: # IF MOON CENTERED, RESCALE FROM (-27)M.
030546,000421: # IF EARTH CENTERED ALREADY AT (-29)M.
030547,000422: 22,3606 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
030548,000423: 22,3607 45610 +1
030549,000424: 22,3610 77624 CALL # IF HPER > MAXNM, SET HPER = 9999.9 NM.
030550,000425: 22,3611 45636 MAXCHK
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Page 721
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030552,000427: 22,3612 16122 STORHPER STODL HPERX # STORE (RPER - RPADTEM) INTO HPERX.
030553,000428: 22,3613 00161 MPAC +4
030554,000429: 22,3614 51025 DSU BPL # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
030555,000430: 22,3615 02201 HPERMIN # IF HPER L/ HPERMIN (300 OR 35) KFT,
030556,000431: 22,3616 45622 DOTPER # THEN ZERO INTO -TPER.
030557,000432: 22,3617 52145 DLOAD GOTO # OTHERWISE CALCULATE TPER.
030558,000433: 22,3620 06522 HI6ZEROS
030559,000434: 22,3621 45626 SKIPTPER
030560,000435: 22,3622 45145 DOTPER DLOAD CALL
030561,000436: 22,3623 00017 RPER
030562,000437: 22,3624 57465 CALCTPER
030563,000438: 22,3625 77676 DCOMP # TPER IS PUT NEG INTO -TPER.
030564,000439: 22,3626 16143 SKIPTPER STODL -TPER
030565,000440: 22,3627 02201 HPERMIN # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
030566,000441: 22,3630 45015 DAD CALL
030567,000442: 22,3631 02203 RPADTEM # RPADTEM AT (-29)M FOR EARTH, (-27)M MOON
030568,000443: 22,3632 57470 CALCTFF # GIVES 59M59S FOR TFF IF RPER G/
030569,000444: 22,3633 77676 DCOMP # HPERMIN + RPADTEM. (TPER WAS NON ZERO)
030570,000445: 22,3634 36141 STCALL TFF # OTHERWISE COMPUTES TFF. (GOTO)
030571,000446: 22,3635 00051 S2
030572,000447:
030573,000448: 22,3636 51025 MAXCHK DSU BPL # IF C(MPAC) > 9999.9 NM, MPAC = 9999.9 NM
030574,000449: 22,3637 05646 MAXNM
030575,000450: 22,3640 45643 +3 # OTHERWISE C(MPAC) = B(MPAC).
030576,000451: 22,3641 43415 DAD RVQ
030577,000452: 22,3642 05646 MAXNM
030578,000453: 22,3643 43545 +3 DLOAD RVQ # (USED BY P30 - P37 ALSO)
030579,000454: 22,3644 05646 MAXNM
030580,000455:
030581,000456: 22,3645 01065 05603 MAXNM 2OCT 0106505603
030582,000457:
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Page 722
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030585,000460:
End of include-file R30.agc. Parent file is MAIN.agc