Source Code

030431,000001: # Copyright: Public domain. 030432,000002: # Filename: R30.agc 030433,000003: # Purpose: Part of the source code for Luminary 1A build 099. 030434,000004: # It is part of the source code for the Lunar Module's (LM) 030435,000005: # Apollo Guidance Computer (AGC), for Apollo 11. 030436,000006: # Assembler: yaYUL 030437,000007: # Contact: Ron Burkey <info@sandroid.org>. 030438,000008: # Website: www.ibiblio.org/apollo. 030439,000009: # Pages: 712-722 030440,000010: # Mod history: 2009-05-19 RSB Adapted from the corresponding 030441,000011: # Luminary131 file, using page 030442,000012: # images from Luminary 1A. 030443,000013: # 2009-06-07 RSB Removed a space between two components of 030444,000014: # a 2OCT that isn't legal in yaYUL. 030445,000015: 030446,000016: # This source code has been transcribed or otherwise adapted from 030447,000017: # digitized images of a hardcopy from the MIT Museum. The digitization 030448,000018: # was performed by Paul Fjeld, and arranged for by Deborah Douglas of 030449,000019: # the Museum. Many thanks to both. The images (with suitable reduction 030450,000020: # in storage size and consequent reduction in image quality as well) are 030451,000021: # available online at www.ibiblio.org/apollo. If for some reason you 030452,000022: # find that the images are illegible, contact me at info@sandroid.org 030453,000023: # about getting access to the (much) higher-quality images which Paul 030454,000024: # actually created. 030455,000025: 030456,000026: # Notations on the hardcopy document read, in part: 030457,000027: 030458,000028: # Assemble revision 001 of AGC program LMY99 by NASA 2021112-61 030459,000029: # 16:27 JULY 14, 1969 030460,000030: 030461,000031: # Page 712 030462,000032: # SUBROUTINE NAME: V82CALL 030463,000033: # MOD NO: 0 DATE: 16 FEB 67 030464,000034: # MOD BY: R. R. BAIRNSFATHER LOG SECTION: R30 030465,000035: # MOD NO: 1 MOD BY: R. R. BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN 030466,000036: # MOD NO: 2 MOD BY: ALONSO DATE: 11 DEC 67 VB82 PROGRAM REWRITTEN 030467,000037: # MOD NO: 3 MOD BY: ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE 030468,000038: 030469,000039: # NEW FUNCTIONAL DESCRIPTION: CALLED BY VERB 82 ENTER. PRIORITY 10. 030470,000040: # USED THROUGHOUT. CALCULATE AND DISPLAY ORBITAL PARAMETERS 030471,000041: 030472,000042: # 1. IF AVERAGE G IS OFF: 030473,000043: # FLASH DISPLAY V04N06. R2 INDICATES WHICH SHIP'S STATE VECTOR IS 030474,000044: # TO BE UPDATED. INITIAL CHOICE IS THIS SHIP (R2=1). ASTRONAUT 030475,000045: # CAN CHANGE TO OTHER SHIP BY V22E XE. WHERE X IS NOT EQ 1. 030476,000046: # SELECTED STATE VECTOR UPDATED BY THISPREC (OTHPREC). 030477,000047: # CALLS SR30.1 (WHICH CALLS TFFCONMU + TFFRP/RA) TO CALCULATE 030478,000048: # RPER (PERIGEE RADIUS), RAPO (APOGEE RADIUS), HPER (PERIGEE 030479,000049: # HEIGHT ABOVE LAUNCH PAD OR LUNAR LANDING SITE), HARD (APOGEE 030480,000050: # HEIGHT AS ABOVE), TPER (TIME TO PERIGEE), TFF (TIME TO 030481,000051: # INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE). 030482,000052: # FLASH MONITOR V16N44 (HAPO, HPER, TFF). TFF IS -59M59S IF IT WAS 030483,000053: # NOT COMPUTABLE, OTHERWISE IT INCREMENTS ONCE PER SECOND. 030484,000054: # ASTRONAUT HAS OPTION TO MONITOR TPER BY KEYING IN N 32 E. 030485,000055: # DISPLAY IS IN HMS, IS NEGATIVE (AS WAS TFF), AND INCREMENTS 030486,000056: # ONCE PER SECOND ONLY IF TFF DISPLAY WAS -59M59S. 030487,000057: # 2. IF AVERAGE G IS ON: 030488,000058: # CALLS SR30.1 APPROX EVERY TWO SECS. STATE VECTOR IS ALWAYS 030489,000059: # FOR THIS VEHICLE. V82 DOES NOT DISTURB STATE VECTOR. RESULTS 030490,000060: # OF SR30.1 ARE RAPO, RPER, HAPO, HPER, TPER, TFF. 030491,000061: # FLASH MONITOR V16N44 (HAPO, HPER, TFF). 030492,000062: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE 030493,000063: # ABOVE REMARKS. 030494,000064: 030495,000065: # CALLING SEQUENCE: VERB 82 ENTER. 030496,000066: 030497,000067: # SUBROUTINES CALLED: SR30.1, GOXDSPF 030498,000068: # MAYBE -- THISPREC, OTHPREC, LOADTIME, DELRSPL 030499,000069: 030500,000070: # NORMAL EXIT MODES: TC ENDEXT 030501,000071: 030502,000072: # ALARMS: NONE 030503,000073: 030504,000074: # OUTPUT: HAPOX (-29) M 030505,000075: # HPERX (-29) M 030506,000076: # RAPO (-29) M EARTH 030507,000077: # (-27) M MOON 030508,000078: # RPER (-29) M EARTH 030509,000079: # (-27) M MOON 030510,000080: # TFF (-28) CS CONTAINS NEGATIVE QUANTITY 030511,000081: # -TPER (-28) CS CONTAINS NEGATIVE QUANTITY 030512,000082: 030513,000083: # Page 713 030514,000084: # ERASABLE INITIALIZATION REQUIRED: STATE VECTOR. 030515,000085: 030516,000086: # DEBRIS: QPRET, RONE, VONE, TFF/RTMU, HPERMIN, RPADTEM, V82EMFLG. 030517,000087: # MAYBE: TSTART82, V82FLAGS, TDEC1. 030518,000088: 030519,000089: 13,2351 E4,1517 EBANK= HAPOX 030520,000090: 31,2144 BANK 31 030521,000091: 22,2000 SETLOC R30LOC 030522,000092: 22,2000 BANK 030523,000093: 22,3242 COUNT* $$/R30 030524,000094: 030525,000095: 22,3242 06037 V82CALL TC INTPRET 030526,000096: 22,3243 52014 BON GOTO 030527,000097: 22,3244 03712 AVEGFLAG 030528,000098: 22,3245 45465 V82GON # IF AVERAGE G ON 030529,000099: 22,3246 45247 V82GOFF # IF AVERAGE G OFF 030530,000100: 030531,000101: 22,3247 77776 V82GOFF EXIT # ALLOW ASTRONAUT TO SELECT VEHICLE 030532,000102: 22,3250 34752 CAF TWO # DESIRED FOR ORBITAL PARAMETERS 030533,000103: 22,3251 55051 TS OPTIONX # CALCULATION AND DISPLAY. 030534,000104: 22,3252 34753 CAF ONE 030535,000105: 22,3253 55052 TS OPTIONX +1 030536,000106: 22,3254 33316 CAF OPTIONVN # V 04 N 06 030537,000107: 22,3255 04616 TC BANKCALL 030538,000108: 22,3256 20334 CADR GOXDSPF 030539,000109: 22,3257 05472 TC ENDEXT # TERMINATE 030540,000110: 22,3260 03262 TC +2 # PROCEED 030541,000111: 22,3261 03254 TC -5 # DATA IN. OPTION1+1 = 1 FOR THIS VEHICLE 030542,000112: # UNEQ 1 FOR OTHER VEHICLE 030543,000113: 22,3262 34750 CAF BIT4 # 80 MS 030544,000114: 22,3263 05203 TC WAITLIST 030545,000115: 22,3264 E4,1540 EBANK= TFF 030546,000116: 22,3264 03430 44064 2CADR TICKTEST 030547,000117: 030548,000118: 22,3266 00003 RELINT 030549,000119: 22,3267 33320 V82GOFLP CAF TFFBANK # MAJOR RECYCLE LOOP ENTRY 030550,000120: 22,3270 54003 TS EBANK 030551,000121: 22,3271 34755 CAF ZERO 030552,000122: 22,3272 55537 TS V82FLAGS # ZERO FLAGS FOR TICKTEST, INHIBITS 030553,000123: # DECREMENTING OF TFF AND -TPER. 030554,000124: 22,3273 35021 CAF PRIO7 030555,000125: 22,3274 05105 TC FINDVAC # V82GOFF1 WILL EXECUTE STATE VECTOR 030556,000126: 22,3275 E4,1540 EBANK= TFF # UPDATE AND ORBIT CALCULATIONS FOR 030557,000127: 22,3275 03321 44064 2CADR V82GOFF1 # SELECTED VEHICLE ABOUT PROPER BODY. 030558,000128: 030559,000129: 22,3277 00003 RELINT 030560,000130: 22,3300 36245 V82STALL CAF THREE # STALL IN THIS LOOP AND WITHOLD V 16 N 44 030561,000131: # Page 714 030562,000132: 22,3301 71537 MASK V82FLAGS # UNTIL STATE VECTOR UPDATE SETS ONE OF 030563,000133: 22,3302 10000 CCS A # OUR FLAG BITS. 030564,000134: 22,3303 03310 TC FLAGGON # EXIT FROM STALL LOOP. 030565,000135: 22,3304 34777 CAF 1SEC 030566,000136: 22,3305 04616 TC BANKCALL 030567,000137: 22,3306 01735 CADR DELAYJOB 030568,000138: 22,3307 03300 TC V82STALL 030569,000139: 030570,000140: 22,3310 33317 FLAGGON CAF V16N44 # MONITOR HAPO,HPER,TFF. 030571,000141: 22,3311 04616 TC BANKCALL 030572,000142: 22,3312 20334 CADR GOXDSPF 030573,000143: 22,3313 05563 TC B5OFF # TERM. THIS TELLS TICKTEST TO KILL ITSELF 030574,000144: 22,3314 05563 TC B5OFF # PROCEED. DITTO 030575,000145: 22,3315 03267 TC V82GOFLP # RECYCLE. RECOMPUTE STATE VECT + DISPLAY 030576,000146: 030577,000147: 22,3316 01014 OPTIONVN VN 412 030578,000148: 22,3317 04054 V16N44 VN 1644 030579,000149: 22,3320 02140 TFFBANK ECADR TFF 030580,000150: 030581,000151: 22,3321 06037 V82GOFF1 TC INTPRET 030582,000152: 22,3322 77634 RTB 030583,000153: 22,3323 21573 LOADTIME 030584,000154: 22,3324 00041 STORE TDEC1 # TIME FOR STATE VECTOR UPDATE. 030585,000155: 22,3325 02205 STORE TSTART82 # TIME FOR INTERNAL USE. 030586,000156: 22,3326 77776 EXIT 030587,000157: 22,3327 41052 CS OPTIONX +1 # 1 FOR THIS VEHICLE, NOT 1 FOR OTHER. 030588,000158: 22,3330 64753 AD ONE 030589,000159: 22,3331 00006 EXTEND 030590,000160: 22,3332 13356 BZF THISSHIP 030591,000161: 22,3333 06037 OTHSHIP TC INTPRET 030592,000162: 22,3334 77624 CALL # CALL STATE VECTOR UPDATE FOR OTHER SHIP. 030593,000163: 22,3335 27043 OTHPREC 030594,000164: 22,3336 77775 BOTHSHIP VLOAD # MOVE RESULTS INTO TFFCONIC STORAGE AREAS 030595,000165: 22,3337 00001 RATT # TO BE CALLED BY SR30.1. 030596,000166: 22,3340 26207 STOVL RONE # RATT AT (-29)M FOR EARTH OR MOON. 030597,000167: 22,3341 00007 VATT 030598,000168: 22,3342 02215 STORE VONE # VATT AT (-7)M/CS FOR EARTH OR MOON 030599,000169: 22,3343 77743 DLOAD* 030600,000170: 22,3344 73774 1/RTMUE,2 # X2 IS 0 FOR EARTH CENTERED STATE VEC 030601,000171: 22,3345 00037 STORE TFF/RTMU # X2 IS 2 FOR MOON 030602,000172: 22,3346 77743 DLOAD* # AS LEFT BY THISPREC OR OTHPREC. 030603,000173: 22,3347 72411 MINPERE,2 030604,000174: 22,3350 02201 STORE HPERMIN # TFFRTMU, HPERMIN, AND RPADTEM ARE ALL 030605,000175: 22,3351 46135 SLOAD BHIZ # EARTH/MOON PARAMETERS AS SET HERE. 030606,000176: 22,3352 00050 X2 030607,000177: 22,3353 45367 EARTHPAD 030608,000178: 22,3354 77650 GOTO 030609,000179: 22,3355 45373 MOONPAD 030610,000180: # Page 715 030611,000181: 22,3356 06037 THISSHIP TC INTPRET 030612,000182: 22,3357 77624 CALL # CALL STATE VECTOR UPDATE FOR THIS SHIP. 030613,000183: 22,3360 27057 THISPREC 030614,000184: 22,3361 77650 GOTO 030615,000185: 22,3362 45336 BOTHSHIP 030616,000186: 030617,000187: # THE FOLLOWING CONSTANTS ARE PAIRWISE INDEXED. DO NOT SEPARATE PAIRS. 030618,000188: 030619,000189: 22,3363 00001 11530 MINPERM 2DEC 10668 B-27 # 35 KFT MIN PERIGEE HEIGHT FOR MOON(-27)M 030620,000190: 030621,000191: 22,3365 00002 31230 MINPERE 2DEC 91440 B-29 # 300 KFT (-29)M FOR EARTH 030622,000192: 030623,000193: 22,3367 43145 EARTHPAD DLOAD CLRGO # PAD 37-B RADIUS. SCALED AT (-29)M 030624,000194: 22,3370 06315 RPAD 030625,000195: 22,3371 03635 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1 030626,000196: 22,3372 45377 BOTHPAD 030627,000197: 030628,000198: 22,3373 51575 MOONPAD VLOAD ABVAL # COMPUTE MOON PAD RADIUS FROM RLS VECTOR. 030629,000199: 22,3374 02023 RLS # SCALED AT (-27)M 030630,000200: 22,3375 77614 SET 030631,000201: 22,3376 03475 V82EMFLG # INDICATE MOON SCALILNG FOR SR30.1 030632,000202: 22,3377 36203 BOTHPAD STCALL RPADTEM 030633,000203: 22,3400 45551 SR30.1 # CALCULATE ORBITAL PARAMETERS 030634,000204: 22,3401 45234 RTB DSU 030635,000205: 22,3402 21573 LOADTIME 030636,000206: 22,3403 02205 TSTART82 # PRESENT TIME -- TIME V82GOFF1 BEGAN 030637,000207: 22,3404 02205 STORE TSTART82 # SAVE IT 030638,000208: 22,3405 53145 DLOAD BZE # SR30.1 SETS -TPER=0 IF HPER L/ 030639,000209: 22,3406 02143 -TPER # HPERMIN (300 OR 35) KFT. 030640,000210: 22,3407 45420 TICKTIFF # (-TPER = 0) 030641,000211: 22,3410 43345 TICKTPER DLOAD DAD # (-TPER NON ZERO) TFF WAS NOT COMPUTED. 030642,000212: 22,3411 02143 -TPER # BUT WAS SET TO 59M59S. DON'T DICK TFF, DO 030643,000213: 22,3412 02205 TSTART82 # TICK -TPER. DISPLAY BOTH. 030644,000214: 22,3413 02143 STORE -TPER # -TPER CORRECTED FOR TIME SINCE V82GOFF1 030645,000215: 22,3414 77776 EXIT # BEGAN 030646,000216: 22,3415 34753 CAF BIT1 030647,000217: 22,3416 55537 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY -TPER 030648,000218: 22,3417 05155 TC ENDOFJOB 030649,000219: 030650,000220: 22,3420 43345 TICKTIFF DLOAD DAD # (-TPER=0) TFF WAS COMPUTED. TICK TFF. 030651,000221: 22,3421 02141 TFF # DO NOT TICK -TPER. DISPLAY TFF, BUT NOT 030652,000222: 22,3422 02205 TSTART82 # -TPER. 030653,000223: 22,3423 02141 STORE TFF # TFF CORRECTED FOR TIME SINCE V82GOFF1 030654,000224: 22,3424 77776 EXIT # BEGAN. 030655,000225: 22,3425 34752 CAF BIT2 030656,000226: 22,3426 55537 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY TFF. 030657,000227: 22,3427 05155 TC ENDOFJOB 030658,000228: 030659,000229: # Page 716 030660,000230: 22,3430 34747 TICKTEST CAF BIT5 # THIS WAITLIST PROGRAM PERPETUATES ITSELF 030661,000231: 22,3431 71044 MASK EXTVBACT # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0. 030662,000232: 22,3432 10000 CCS A 030663,000233: 22,3433 03441 TC DOTICK 030664,000234: 22,3434 37713 CAF PRIO25 030665,000235: 22,3435 05072 TC NOVAC # TERMINATE V 82. CAN'T CALL ENDEXT IN RUPT. 030666,000236: 22,3436 1044 EBANK= EXTVBACT 030667,000237: 22,3436 05472 04062 2CADR ENDEXT 030668,000238: 030669,000239: 22,3440 05261 TC TASKOVER 030670,000240: 22,3441 34777 DOTICK CAF 1SEC # RE-REQUEST TICKTEST. 030671,000241: 22,3442 05203 TC WAITLIST 030672,000242: 22,3443 E4,1540 EBANK= TFF 030673,000243: 22,3443 03430 44064 2CADR TICKTEST 030674,000244: 030675,000245: 22,3445 36245 CAF THREE 030676,000246: 22,3446 71537 MASK V82FLAGS 030677,000247: 22,3447 50000 INDEX A 030678,000248: 22,3450 03451 TC +1 030679,000249: 22,3451 05261 TC TASKOVER # IF NO FLAGBITS SET DONT' CHANGE TFF OR 030680,000250: # -TPER, BUT CONTINUE LOOP. 030681,000251: 22,3452 03460 TC TPERTICK # ONLY BIT 1 SET. INCR -TPER BY 1 SEC. 030682,000252: 22,3453 34777 TFFTICK CAF 1SEC # ONLY BIT 2 SET. INCR TFF BY 1 SEC. 030683,000253: 22,3454 54001 TS L 030684,000254: 22,3455 34755 CAF ZERO 030685,000255: 22,3456 21541 DAS TFF 030686,000256: 22,3457 05261 TC TASKOVER 030687,000257: 22,3460 34777 TPERTICK CAF 1SEC 030688,000258: 22,3461 54001 TS L 030689,000259: 22,3462 34755 CAF ZERO 030690,000260: 22,3463 21543 DAS -TPER 030691,000261: 22,3464 05261 TC TASKOVER 030692,000262: 030693,000263: # Page 717 030694,000264: 22,3465 77776 V82GON EXIT # AVERAGE G ON. USE CURRENT STATE VECTOR 030695,000265: # FOR ORBITAL PARAMETER CALCULATIONS. 030696,000266: 22,3466 35021 CAF PRIO7 # LESS THAN LAMBERT 030697,000267: 22,3467 05105 TC FINDVAC # V82GON1 WILL PERFORM ORBIT CALCULATIONS 030698,000268: 22,3470 E4,1540 EBANK= TFF # ABOUT PROPER BODY APPROX ONCE PER SEC. 030699,000269: 22,3470 03503 44064 2CADR V82GON1 030700,000270: 030701,000271: 22,3472 00003 RELINT 030702,000272: 22,3473 10067 CCS NEWJOB # WITHOLD V16 N44 UNTIL FIRST ORBIT CALC 030703,000273: 22,3474 05122 TC CHANG1 # IS DONE. NOTE: V82GON1 (PRIO7, FINDVAC 030704,000274: # JOB) IS COMPLETED BEFORE V82GON (PRIO7, 030705,000275: # NOVAC JOB). 030706,000276: 22,3475 33317 V82REDSP CAF V16N44 # MONITOR HAPO, HPER, TFF 030707,000277: 22,3476 04616 TC BANKCALL 030708,000278: 22,3477 20334 CADR GOXDSPF 030709,000279: 22,3500 05563 TC B5OFF # TERM THIS TELLS V82GON1 TO KILL ITSELF. 030710,000280: 22,3501 05563 TC B5OFF # PROC DITTO. 030711,000281: 22,3502 03475 TC V82REDSP # RECYCLE 030712,000282: 030713,000283: 22,3503 06037 V82GON1 TC INTPRET # THIS EXEC PROGRAM PERPETUATES ITSELF 030714,000284: # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0. 030715,000285: 22,3504 52175 VLOAD GOTO # HOLDS OFF CCS NEWJOB BETWEEN RN AND 030716,000286: 22,3505 01221 RN # VN FETCH SO RN, VN ARE FROM SAME 030717,000287: 22,3506 45507 NEXTLINE # STATE VECTOR UPDATE. 030718,000288: 22,3507 26207 NEXTLINE STOVL RONE # RN AT (-29)M FOR EARTH OR MOON 030719,000289: 22,3510 01227 VN 030720,000290: 22,3511 02215 STORE VONE # VN AT (-7)M/CS FOR EARTH OR MOON 030721,000291: 22,3512 52014 BON GOTO 030722,000292: 22,3513 04304 MOONTHIS # FLAG INDICATES BODY ABOUT WHICH ORBITAL 030723,000293: 22,3514 45516 MOONGON # CALCULATIONS ARE TO BE PERFORMED. 030724,000294: 22,3515 45527 EARTHGON # IF SET -- MOON, IF RESET --EARTH. 030725,000295: 030726,000296: 22,3516 71214 MOONGON SET DLOAD 030727,000297: 22,3517 03475 V82EMFLG # FLAG MOON SCALING FOR SR30.1 030728,000298: 22,3520 04001 1/RTMUM # LUNAR PARAMETERS LOADED HERE FOR SR30.1 030729,000299: 22,3521 14037 STODL TFF/RTMU 030730,000300: 22,3522 05364 MINPERM 030731,000301: 22,3523 26201 STOVL HPERMIN 030732,000302: 22,3524 02023 RLS # SCALED AT (-27)M 030733,000303: 22,3525 52046 ABVAL GOTO 030734,000304: 22,3526 45536 V82GON2 030735,000305: 22,3527 71214 EARTHGON CLEAR DLOAD 030736,000306: 22,3530 03675 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1 030737,000307: 22,3531 04003 1/RTMUE # EARTH PARAMETERS LOADED HERE FOR SR30.1 030738,000308: 22,3532 14037 STODL TFF/RTMU 030739,000309: 22,3533 05366 MINPERE 030740,000310: 22,3534 16201 STODL HPERMIN 030741,000311: 22,3535 06315 RPAD 030742,000312: 22,3536 36203 V82GON2 STCALL RPADTEM # COMMON CODE FOR EARTH & MOON. 030743,000313: 22,3537 45551 SR30.1 030744,000314: # Page 718 030745,000315: 22,3540 77776 EXIT 030746,000316: 22,3541 34747 V82GON3 CAF BIT5 030747,000317: 22,3542 71044 MASK EXTVBACT # SEE IF ASTRONAUT HAS SIGNALLED TERMINATE 030748,000318: 22,3543 00006 EXTEND 030749,000319: 22,3544 15472 BZF ENDEXT # YES, TERMINATE VB 82 LOOP 030750,000320: 22,3545 34777 CAF 1SEC 030751,000321: 22,3546 04616 TC BANKCALL # WAIT ONE SECOND BEFORE REPEATING 030752,000322: 22,3547 01735 CADR DELAYJOB # ORBITAL PARAMETER COMPUTATION. 030753,000323: 22,3550 03503 TC V82GON1 030754,000324: 030755,000325: 22,3551 22,3541 SPLRET = V82GON3 030756,000326: 030757,000327: # Page 719 030758,000328: # SUBROUTINE NAME: SR30.1 030759,000329: # MOD NO: 0 DATE: 16 FEB 67 030760,000330: # MOD BY: R. R. BAIRNSFATHER LOG SECTION: R32 030761,000331: # MOD NO: 1 MOD BY: R. R. BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN 030762,000332: # MOD NO: 2 MOD BY: R. R. BAIRNSFATHER DATE: 14 APR 67 ADD OVFL CK FOR RAPO 030763,000333: # MOD NO: 3 MOD BY ALONSO DATE: 11 DEC 67 SUBROUTINE REWRITTEN 030764,000334: # MOD NO: 4 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE 030765,000335: # MOD NO: 5 MOD BY: R. R. BAIRNSFATHER DATE: 6 AUG 68 OVFL CK FOR HAPO & HPER. VOIDS MOD #2. 030766,000336: 030767,000337: # NEW FUNCTIONAL DESCRIPTION: ORBITAL PARAMETERS DISPLAY FOR NOUNS 32 AND 44. 030768,000338: # SR30.1 CALLS TFFCONMU AND TFFRP/RA TO CALCULATE RPER (PERIGEE RADIUS), 030769,000339: # RAPO (APOGEE RADIUS), HPER (PERIGEE HEIGHT ABOVE LAUNCH PAD OR LUNAR 030770,000340: # LANDING SITE), HAPO (APOGEE HEIGHT AS ABOVE), TPER (TIME TO PERIGEE), 030771,000341: # TFF (TIME TO INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE). 030772,000342: # IF HPER IS GREATER THAN OR EQUAL TO HPERMIN, CALCULATES TPER AND STORES 030773,000343: # NEGATIVE IN -TPER. OTHERWISE STORES +0 IN -TPER. WHENEVER TPER IS 030774,000344: # CALCULATED, TFF IS NOT COMPUTABLE AND DEFAULTS TO -59MIN 59SEC. IF HAPO 030775,000345: # WOULD EXCEED 9999.9 NM, IT IS LIMITED TO THAT VALUE FOR DISPLAY. 030776,000346: 030777,000347: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE 030778,000348: # ABOVE REMARKS. 030779,000349: 030780,000350: # CALLING SEQUENCE: CALL 030781,000351: # SR30.1 030782,000352: 030783,000353: # SUBROUTINES CALLED: TFFCONMU, TFFRP/RA, CALCTPER, CALCTFF 030784,000354: 030785,000355: # NORMAL EXIT MODE: CALLING LINE +1 (STILL IN INTERPRETIVE MODE) 030786,000356: 030787,000357: # ALARMS: NONE 030788,000358: 030789,000359: # OUTPUT: RAPO (-29) M EARTH APOGEE RADIUS EARTH CENTERED COORD. 030790,000360: # (-27) M MOON MOON CENTERED COORD. 030791,000361: # RPER (-29) M EARTH PERIGEE RADIUS EARTH CENTERED COORD. 030792,000362: # (-27) M MOON MOON CENTERED COORD. 030793,000363: # HAPOX (-29) M APOGEE ALTITUDE ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM. 030794,000364: # HPERX (-29) M PERIGEE ALT. ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM. 030795,000365: # TFF (-28) CS TIME TO 300KFT OR 35KFT ALTITUDE 030796,000366: # -TPER (-28) CS TIME TO PERIGEE 030797,000367: 030798,000368: # ERASABLE INITIALIZATION REQUIRED -- 030799,000369: # TFF/RTMU (+17) EARTH RECIPROCAL OF PROPER GRAV CONSTANT FOR 030800,000370: # (+14) MOON EARTH OR MOON = 1/SQRT(MU). 030801,000371: # RONE (-29) M STATE VECTOR 030802,000372: # VONE (-7) M/CS STATE VECTOR 030803,000373: # RPADTEM (-29) M EARTH RADIUS OF LAUNCH PAD OR LUNAR LANDING 030804,000374: # (-27) M MOON SITE. 030805,000375: # HPERMIN (-29) M EARTH (300 OR 35) KFT MINIMUM PERIGEE ALTITUDE 030806,000376: # (-27) M MOON ABOVE LAUNCH PAD OR LUNAR LANDING SITE. 030807,000377: # V82EMFLG (INT SW BIT) RESET FOR EARTH, SET FOR MOON. 030808,000378: 030809,000379: # DEBRIS: QPREG, PDL, S2 030810,000380: 030811,000381: # Page 720 030812,000382: 22,3551 COUNT* $$/SR30S 030813,000383: 030814,000384: 22,3551 44001 SR30.1 SETPD STQ # INITIALIZE PUSHDOWN LIST. 030815,000385: 22,3552 00001 0 030816,000386: 22,3553 00051 S2 030817,000387: # SR30.1 INPUT: RONE AT (-29)M EARTH/MOON 030818,000388: # VONE AT (-7)M/CS 030819,000389: # TFFCONMU, TFFRP/RA, CALCTPER, AND CALCTFF 030820,000390: # CALLS REQUIRE: 030821,000391: # EARTH CENTERED (NO RESCALING REQUIRED) 030822,000392: # RONE SCALED TO B-29 M 030823,000393: # VONE SCALED TO B-7 M/CS 030824,000394: # MOON CENTERED (RESCALING REQUIRED) 030825,000395: # RONE SCALED TO B-27 M 030826,000396: # VONE SCALED TO B-5 M/CS 030827,000397: 22,3554 77214 BOFF VLOAD 030828,000398: 22,3555 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON. 030829,000399: 22,3556 45565 TFFCALLS 030830,000400: 22,3557 02207 RONE 030831,000401: 22,3560 77752 VSL2 030832,000402: 22,3561 26207 STOVL RONE 030833,000403: 22,3562 02215 VONE 030834,000404: 22,3563 77752 VSL2 030835,000405: 22,3564 02215 STORE VONE 030836,000406: 22,3565 77624 TFFCALLS CALL 030837,000407: 22,3566 57361 TFFCONMU 030838,000408: 22,3567 77624 CALL # TFFRP/RA COMPUTES RAPO,RPER. 030839,000409: 22,3570 57427 TFFRP/RA 030840,000410: # RETURNS WITH RAPO IN D(MPAC). 030841,000411: 22,3571 77625 DSU 030842,000412: 22,3572 02203 RPADTEM 030843,000413: 22,3573 64414 BOFF SR2R # NEED HAPO AT (-29)M FOR DISPLAY. 030844,000414: # IF MOON CENTERED, RESCALE FROM (-27)M. 030845,000415: # IF EARTH CENTERED ALREADY AT (-29)M. 030846,000416: 22,3574 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON. 030847,000417: 22,3575 45576 +1 030848,000418: 22,3576 77624 CALL # IF RAPO > MAXNM, SET RAPO =9999.9 NM. 030849,000419: 22,3577 45636 MAXCHK # OTHERWISE STORE (RAPO-RPADTEM) IN HAPO. 030850,000420: 22,3600 16120 STORHAPO STODL HAPOX 030851,000421: 22,3601 00017 RPER 030852,000422: 22,3602 77625 DSU 030853,000423: 22,3603 02203 RPADTEM # GIVES HPER AT (-29)M EARTH, (-27)M MOON. 030854,000424: 22,3604 00161 STORE MPAC +4 # SAVE THIS FOR COMPARISON TO HPERMIN. 030855,000425: 22,3605 64414 BOFF SR2R # NEED HPER AT (-29)M FOR DISPLAY. 030856,000426: # IF MOON CENTERED, RESCALE FROM (-27)M. 030857,000427: # IF EARTH CENTERED ALREADY AT (-29)M. 030858,000428: 22,3606 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON. 030859,000429: 22,3607 45610 +1 030860,000430: 22,3610 77624 CALL # IF HPER > MAXNM, SET HPER = 9999.9 NM. 030861,000431: 22,3611 45636 MAXCHK 030862,000432: # Page 721 030863,000433: 22,3612 16122 STORHPER STODL HPERX # STORE (RPER - RPADTEM) INTO HPERX. 030864,000434: 22,3613 00161 MPAC +4 030865,000435: 22,3614 51025 DSU BPL # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON 030866,000436: 22,3615 02201 HPERMIN # IF HPER L/ HPERMIN (300 OR 35) KFT, 030867,000437: 22,3616 45622 DOTPER # THEN ZERO INTO -TPER. 030868,000438: 22,3617 52145 DLOAD GOTO # OTHERWISE CALCULATE TPER. 030869,000439: 22,3620 06522 HI6ZEROS 030870,000440: 22,3621 45626 SKIPTPER 030871,000441: 22,3622 45145 DOTPER DLOAD CALL 030872,000442: 22,3623 00017 RPER 030873,000443: 22,3624 57465 CALCTPER 030874,000444: 22,3625 77676 DCOMP # TPER IS PUT NEG INTO -TPER. 030875,000445: 22,3626 16143 SKIPTPER STODL -TPER 030876,000446: 22,3627 02201 HPERMIN # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON 030877,000447: 22,3630 45015 DAD CALL 030878,000448: 22,3631 02203 RPADTEM # RPADTEM AT (-29)M FOR EARTH, (-27)M MOON 030879,000449: 22,3632 57470 CALCTFF # GIVES 59M59S FOR TFF IF HPER G/ 030880,000450: 22,3633 77676 DCOMP # HPERMIN + RPADTEM. (TPER WAS NON ZERO) 030881,000451: 22,3634 36141 STCALL TFF # OTHERWISE COMPUTES TFF. (GOTO) 030882,000452: 22,3635 00051 S2 030883,000453: 030884,000454: 22,3636 51025 MAXCHK DSU BPL # IF C(MPAC) > 9999.9 NM. MPAC = 9999.9 NM. 030885,000455: 22,3637 05646 MAXNM 030886,000456: 22,3640 45643 +3 # OTHERWISE C(MPAC) - B(MPAC). 030887,000457: 22,3641 43415 DAD RVQ 030888,000458: 22,3642 05646 MAXNM 030889,000459: 22,3643 43545 +3 DLOAD RVQ # (USED BY P30 -- P37 ALSO) 030890,000460: 22,3644 05646 MAXNM 030891,000461: 030892,000462: 22,3645 01065 05603 MAXNM 2OCT 0106505603 030893,000463: 030894,000464: # Page 722 (empty page) 030895,000465: End of include-file R30.agc. Parent file is MAIN.agc