Source Code
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These source-code files are part of a reconstructed copy of Comanche 051, the
original release of the Apollo 11 Command Module (CM) Apollo Guidance Computer
(AGC) software.
The reconstruction began with source code of Comanche 055 previously transcribed
from a digitized copy of that program. The code was then updated by undoing
changes related to the R-2 lunar potential model, using hints from program
comments and change-indicating asterisks in the Comanche 055 listing as a guide.
The reconstruction was verified by matching memory-bank checksums to those listed
in drawing 2021153D. Note that page numbers in the reconstructed code match those
on the Comanche 055 printout, although the added code would likely have changed page
numbers for a real Comanche 051 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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034485,000002: ## Copyright: Public domain.
034486,000003: ## Filename: P61-P67.agc
034487,000004: ## Purpose: A section of Comanche revision 051.
034488,000005: ## It is part of the reconstructed source code for the
034489,000006: ## original release of the flight software for the Command
034490,000007: ## Module's (CM) Apollo Guidance Computer (AGC) for Apollo 11.
034491,000008: ## The code has been recreated from a copy of Comanche 055. It
034492,000009: ## has been adapted such that the resulting bugger words
034493,000010: ## exactly match those specified for Comanche 51 in NASA drawing
034494,000011: ## 2021153D, which gives relatively high confidence that the
034495,000012: ## reconstruction is correct.
034496,000013: ## Reference: pp. 789-818
034497,000014: ## Assembler: yaYUL
034498,000015: ## Contact: Ron Burkey <info@sandroid.org>.
034499,000016: ## Website: www.ibiblio.org/apollo/index.html
034500,000017: ## Mod history: 2019-07-30 MAS Created from Comanche 55.
034501,000018:
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Page 789
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034503,000020: # PROGRAM: P61
034504,000021: # MOD NO.: 0 MAR. 13, 1967
034505,000022: # MOD BY: R. HIRSCHKOP
034506,000023: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 22 JUN 67 RESTARTS.
034507,000024: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP CHANGES.
034508,000025: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 8 MAY 68 DELETE CMSM MANEUVER (PCR 50)
034509,000026: # FUNCTION: TO CALCULATE AND DISPLAY EMS INITIALIZATION DATA
034510,000027: # CALLING SEQUENCE- BY V37
034511,000028: # EXIT- TO P62
034512,000029: # SUBROUTINE CALLS- S61.1, S61.3, GOFLASH, FLAGUP, R02BOTH
034513,000030: # ERASABLE INITIALIZATION:
034514,000031: # EMSALT (-29) M .05G ALTITUDE ABOVE FISCHER ELLIPSOID PAD LOADED.
034515,000032: # ALFAPAD /180 HYPERSONIC CM TRIM ANGLE OF ATTACK PAD LOADED
034516,000033: # OUTPUT: THE FOLLOWING REGISTERS ARE WRITTEN IN FOR USE BY DISPLAYS
034517,000034: # GMAX 100 GMAX (-14) G,S MAXIMUM ACCELERATION
034518,000035: # VPRED (-7) M/CS PREDICTED VELOCITY AT 400K FT
034519,000036: # GAMMAEI GAMMA/360 PREDICTED GAMMA AT 400K FT
034520,000037: # RTGO THETAH/360 RANGE ANGLE TO SPLASH FROM EMSALT EMSALT IS PAD LOADED
034521,000038: # VIO (-7) M/CS INERTIAL VELOCITY AT EMSALT EMSALT IS PAD LOADED
034522,000039: # TTE (-28) CS TIME TO EMSALT EMSALT IS PAD LOADED
034523,000040: # LAT(SPL) /360 TARGET LOCATION LEFT BY DSKY
034524,000041: # LNG(SPL) /360 TARGET LOCATION LEFT BY DSKY
034525,000042: # HEADSUP (0) +1 = LIFT DOWN, -1 = LIFT UP LEFT BY DSKY
034526,000043: # DEBRIS: SEE SUBROUTINES.
034527,000044:
034528,000045: 26,2217 BANK 26
034529,000046: 26,2000 SETLOC P60S
034530,000047: 26,2000 BANK
034531,000048:
034532,000049: 26,2217 E6,1661 EBANK= AOG
034533,000050:
034534,000051: 26,2217 COUNT* $$/P61
034535,000052:
034536,000053: 26,2217 35002 P61 CA BIT14 # EXTENDED VERB SHOULD BE FREE THIS CLOSE
034537,000054: 26,2220 55044 TS EXTVBACT # TO V37
034538,000055: # LOCK OUT EXTENDED VERBS SO CAN USE TFF
034539,000056: # ROUTINES. EXT VERB ERASE IS USED
034540,000057:
034541,000058: 26,2221 45017 CS ONE # REMOVE IF HEADSUP EVER ON UPLINK DATA
034542,000059: 26,2222 55726 TS HEADSUP # PRELOAD
034543,000060:
034544,000061: 26,2223 02544 TC S61.1 # CHECK STATE VECTOR AND IMU ORIENTATION
034545,000062: # RV 60GENRET. DOES PHASCHNG, GROUP 4.
034546,000063:
034547,000064: 26,2224 32425 CA V06N61 # LAT(SPL) LNG(SPL) HEADSUP
034548,000065: # XXX.XX DEG XXX.XX DEG XXXXX.
034549,000066: 26,2225 04662 TC BANKCALL
034550,000067: 26,2226 21057 CADR GOFLASHR
034551,000068: 26,2227 04106 TC GOTOPOOH
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Page 790
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034553,000070: 26,2230 02235 TC P61.4
034554,000071: 26,2231 02224 TC -5
034555,000072:
034556,000073: 26,2232 05412 P61.3 TC PHASCHNG
034557,000074: 26,2233 00014 OCT 00014
034558,000075:
034559,000076: 26,2234 05217 TC ENDOFJOB
034560,000077:
034561,000078: 26,2235 22007 P61.4 ZL
034562,000079: 26,2236 11726 CCS HEADSUP # C(HEADSUP)= +1/-1
034563,000080: 26,2237 35002 CA BIT14 # IF HEADSUP POS,ROLLC =180 DEG.(LIFT DWN)
034564,000081: 26,2240 12241 NOOP # IF HEADSUP NEG,ROLLC =0 (LIFT UP)
034565,000082: 26,2241 53716 DXCH ROLLC # ROLLC IS USED BY S62.3: GIM ANG AT .05G
034566,000083:
034567,000084: 26,2242 06006 TC INTPRET
034568,000085: 26,2243 77745 NEWRNVN DLOAD
034569,000086: 26,2244 01205 PIPTIME # SAVE TIME OF RN,VN TO DETERMINE IF AN
034570,000087: 26,2245 37651 STCALL MM # UPDATE HAS OCCURRED
034571,000088: 26,2246 52063 STARTEN1 # INITIALIZE
034572,000089: 26,2247 77775 VLOAD
034573,000090: 26,2250 01171 RN
034574,000091: 26,2251 02327 STORE RONE
034575,000092: 26,2252 77656 UNIT
034576,000093: 26,2253 26343 STOVL URONE
034577,000094: 26,2254 01177 VN
034578,000095: 26,2255 02335 STORE VONE
034579,000096: 26,2256 53435 VXV UNIT
034580,000097: 26,2257 02343 URONE
034581,000098: 26,2260 03502 STORE UNI
034582,000099: 26,2261 45345 DUMPP61 DLOAD DSU
034583,000100: 26,2262 03651 MM # INITIAL VALUE OF PIPTIME
034584,000101: 26,2263 01205 PIPTIME
034585,000102: 26,2264 45040 BMN CALRB
034586,000103: 26,2265 54243 NEWRNVN # UPDATED... GO TRY AGAIN
034587,000104: 26,2266 54651 S61.2 # GET DISPLAY DATA FOR N60 AND N63
034588,000105: # AND RETURN IN BASIC, BELOW.
034589,000106: 26,2267 05536 P61.1 TC CLEARMRK
034590,000107: 26,2270 32424 CA V06N60 # GMAX VPRED GAMMAEI
034591,000108: # XXX.XX G XXXXX. FPS XXX.XX DEG
034592,000109: 26,2271 04662 TC BANKCALL
034593,000110: 26,2272 20720 CADR GOFLASH
034594,000111:
034595,000112: 26,2273 04106 TC GOTOPOOH
034596,000113: 26,2274 02276 TC P61.2 # PROCEED
034597,000114: 26,2275 02270 TC -5
034598,000115:
034599,000116: 26,2276 06006 P61.2 TC INTPRET # CORRECT TTE FOR TIME LAPSE DURING
034600,000117: # ABOVE DISPLAY.
034601,000118: 26,2277 45234 RTB DSU
034602,000119: 26,2300 45510 LOADTIME # CURRENT TIME.
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Page 791
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034604,000121: 26,2301 03651 MM # PIPTIME FOR RONE & VONE.
034605,000122: 26,2302 77615 DAD
034606,000123: 26,2303 03733 TTE1 # NEGATIVE OF FREE FALL TIME.
034607,000124: 26,2304 03727 STORE TTE # DECREMENTED
034608,000125:
034609,000126: 26,2305 77776 EXIT
034610,000127:
034611,000128: 26,2306 32426 CA V06N63 # RTGO VIO TTE
034612,000129: # XXXX.X NM XXXXX. FPS XXBXX M,S
034613,000130: 26,2307 04662 TC BANKCALL
034614,000131: 26,2310 20720 CADR GOFLASH
034615,000132: 26,2311 04106 TC GOTOPOOH
034616,000133: 26,2312 02314 TC +2
034617,000134: 26,2313 02276 TC P61.2 # REDO
034618,000135:
034619,000136: # .... THEN FALL INTO P62
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Page 792
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034621,000138:
034622,000139: # PROGRAM- P62
034623,000140: # MOD NO.- 0 MAR. 13, 1967
034624,000141: # MOD BY- R. HIRSCHKOP
034625,000142: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 67
034626,000143: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 22 JUN 67 RESTARTS.
034627,000144: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP CHANGES.
034628,000145: # MOD NO: 4 MOD BY: RR BAIRNSFATHER DATE: 8 MAY 68 MOVE START OF DESIRED GIMBAL CALC.
034629,000146: # FUNCTION- 1) TO NOTIFY CREW WHEN GNC SYSTEM IS PREPARED FOR CM/SM SEPARATION
034630,000147: # 2) TO ORIENT THE CM TO THE CORRECT ATTITUDE FOR ATMOSPHERIC ENTRY
034631,000148: # CALLING SEQUENCE- BY V37 OR DIRECTLY FROM P61
034632,000149: # EXIT- TO P63
034633,000150: # ERASABLE INITIALIZATION:
034634,000151: # ALFAPAD LEFT BY PAD LOAD
034635,000152: # LADPAD LEFT BY PAD LOAD
034636,000153: # LODPAD LEFT BY PAD LOAD
034637,000154: # LAT(SPL) (MAY BE CHANGED BELOW) LEFT BY DSKY, VIA P61
034638,000155: # LNG(SPL) (MAY BE CHANGED BELOW) LEFT BY DSKY, VIA P61
034639,000156: # HEADSUP (MAY BE CHANGED BELOW) LEFT BY DSKY, VIA P61
034640,000157: # SUBROUTINE CALLS: NEWMODEX, S61.1, CM/DAPIC, CM/DAPON, R02BOTH, GOPERF1, GOFLASH, GODSPR
034641,000158:
034642,000159: 26,2314 COUNT* $$/P62
034643,000160:
034644,000161: 26,2314 05354 TC NEWMODEX # MODE CHANGE IF CAME FROM P61.
034645,000162: 26,2315 00076 MM 62 B-14 # MODE CHANGE AUTOMATIC VIA V 37.
034646,000163: 26,2316 35017 CA ONE
034647,000164: 26,2317 54332 TS DNLSTCOD
034648,000165:
034649,000166: 26,2320 02544 P62 TC S61.1 # CHECK STATE VECTOR AND IMU ORIENTATION.
034650,000167:
034651,000168: 26,2321 06006 TC INTPRET
034652,000169: 26,2322 47131 SSP RTB
034653,000170: 26,2323 03325 POSEXIT
034654,000171: 26,2324 54401 P62.3 # CALCULATE DESIRED .05G GIMBAL ANGLES,
034655,000172: # WITHOUT DISPLAY.
034656,000173: 26,2325 41672 CM/DAPIC # START CM/POSE AND BODY RATE CALC
034657,000174:
034658,000175: # DOES 2PHSCHNG, OCT 40116, OCT 05024, OCT 13000.
034659,000176: # CM/DAPIC SETS EBANK = EBAOG
034660,000177: # AND RETURNS IN BASIC TO P62.2.
034661,000178: 26,2326 00006 P62.2 EXTEND
034662,000179: 26,2327 32432 DCA POSECADR # CONTINUE WITH CM/POSE AFTER AV G.
034663,000180: 26,2330 53223 DXCH AVEGEXIT
034664,000181:
034665,000182: 26,2331 34270 CAF OCT41 # REQUEST SEPARATION
034666,000183: 26,2332 04662 TC BANKCALL
034667,000184: 26,2333 21125 CADR GOPERF1R
034668,000185: 26,2334 04106 TC GOTOPOOH
034669,000186: 26,2335 02340 TC +3 # PROCEED
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Page 793
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034671,000188: # NOTE: NODOFLAG WILL BE SET IN CM/DAPON. <<<
034672,000189: 26,2336 02331 TC -5 # ENTER
034673,000190: 26,2337 02232 TC P61.3 # FOR PHASCHNG AND ENDOFJOB.
034674,000191:
034675,000192: 26,2340 04701 +3 TC POSTJUMP
034676,000193: 26,2341 41612 CADR CM/DAPON # DISABLE RCS DAP, ENABLE ENTRY DAP AND
034677,000194: # DO ATTITUDE HOLD.
034678,000195:
034679,000196: # WILL IDLE UNTIL CM/POSE DOES ONE UPDATE.
034680,000197: # CM/DAPON DOES NO PHASCHNG.
034681,000198:
034682,000199: 26,2342 32425 P62.1 CA V06N61 # LAT(SPL) LNG(SPL) HEADSUP
034683,000200: # XXX.XX DEG XXX.XX DEG 0000X.
034684,000201:
034685,000202: # TERMINATE ATTITUDE HOLD. SET UP COMMANDS:
034686,000203: # ROLLC, ALFACOM, BETACOM. BEGIN MANUVER TO
034687,000204: # ENTRY ATTITUDE.
034688,000205:
034689,000206: 26,2343 04662 TC BANKCALL
034690,000207: 26,2344 20720 CADR GOFLASH
034691,000208: 26,2345 02342 TC -3
034692,000209: 26,2346 02350 TC +2
034693,000210: 26,2347 02342 TC -5
034694,000211:
034695,000212: 26,2350 05412 TC PHASCHNG
034696,000213: 26,2351 04024 OCT 04024 # USE ENTRYVN FOR DISPLAY BELOW.
034697,000214: # EBANK WAS SET IN CM/DAPON TO EBAOG
034698,000215:
034699,000216: 26,2352 11726 CCS HEADSUP # C(HEADSUP) = +/- 1
034700,000217: 26,2353 35002 CA BIT14 # IF HEADSUP POS, ROLLC=180 DEG (LIFT DWN)
034701,000218: 26,2354 12355 NOOP # IF HEADSUP NEG, ROLLC=0 DEG (LIFT UP)
034702,000219: 26,2355 55715 TS ROLLC
034703,000220: 26,2356 31411 CA ALFAPAD # NOMINAL ALFATRIM PAD LOADED, NEG. NO.
034704,000221: 26,2357 22007 ZL
034705,000222: 26,2360 53604 DXCH ALFACOM # SET ALFACOM = ALFA TRIM, BETACOM=0
034706,000223:
034707,000224: 26,2361 35017 CA ONE # PERMITS EXDAP2 TO CHANGE FLAG TO +0
034708,000225: 26,2362 55727 TS P63FLAG # AS INDICATOR. STARTS UP P63.
034709,000226:
034710,000227: 26,2363 35052 CA V06N22 # SET UP DISPLAY FOR CDU DESIRED VALUES
034711,000228: 26,2364 55263 TS ENTRYVN # FROM ENTRY ATTITUDE CALC, THAT IS
034712,000229: # ALREADY GOING.
034713,000230: 26,2365 05546 TC UPFLAG # TURN ON ENTRY DISPLAY
034714,000231: 26,2366 00134 ADRES ENTRYDSP # ENTRYDSP = 92D BIT 13 FLAG 6
034715,000232: # SKIP
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Page 794
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034717,000234: 26,2367 41700 CS CMDAPMOD # GO DIRECTLY TO P63 IF BODY ATTITUDE
034718,000235: 26,2370 75017 MASK ONE # IS SUCH THAT THE DELAY TASK: WAKEP62
034719,000236: 26,2371 00006 EXTEND # WILL BE OMITTED.
034720,000237: 26,2372 12421 BZF P63.1 # DISABLE GRP 4, GO TO ENDOFJOB.
034721,000238: # (IE, CONTINUE IF CMDAPMOD = -1, OR +0)
034722,000239: 26,2373 02405 TC P63
034723,000240:
034724,000241: # PUT JOB TO SLEEP UNTIL VEHICLE MANUVER HAS
034725,000242: # REDUCED ALFA TO +/-45 DEG. CONSIDER REMAINING
034726,000243: # 65 DEG (25 DEG IF ALFA NEG) TO ALFA TRIM TO
034727,000244: # OCCUR AT 3 DEG/SEC, AND TERMINATE P62 AT THAT
034728,000245: # TIME.
034729,000246:
034730,000247: # TASK WAKEP62 IS CALLED FROM ENTRY DAP.
034731,000248: 26,2374 35065 WAKEP62 CA PRIO13
034732,000249: 26,2375 05134 TC NOVAC
034733,000250: 26,2376 E6,1661 EBANK= AOG
034734,000251: 26,2376 02405 54066 2CADR P63
034735,000252:
034736,000253: 26,2400 05324 TC TASKOVER
034737,000254:
034738,000255: # EACH 2 SEC, CALCULATE GIMBAL ANGLES FOR ENTRY CON-
034739,000256: # DITIONS THAT WILL HOLD IF REORIENTATION WERE MADE
034740,000257: # AT PRESENT RN, VN. COME HERE FROM CM/POSE AND ALSO
034741,000258: # IN KEPLER PHASE OF ENTRY.
034742,000259:
034743,000260: 26,2401 52131 P62.3 SSP GOTO # SET RETURN ADDRESS SO THAT ROUTINE
034744,000261: 26,2402 00053 QPRET # GOES DIRECTLY TO ENTRY GUIDANCE EXIT
034745,000262: 26,2403 53576 ENDEXIT # THAT DOES ENTRY DISPLAY, GRP 5.
034746,000263: 26,2404 20376 S62.3 # PUT DESIRED CDU VALUES IN CPHI'S FOR
034747,000264: # N22 DISPLAY.
034748,000265:
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Page 795
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034750,000267: # P63
034751,000268: # PROGRAM- P63
034752,000269: # MOD NO.- 0 MAR. 13, 1967
034753,000270: # MOD BY- R. HIRSCHKOP
034754,000271: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 22 JIN 67 RESTARTS.
034755,000272: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 14 JUL 67 REVISED RESTARTS
034756,000273: # FUNCTION- 1) TO INITIALIZE THE ENTRY EQUATIONS
034757,000274: # 2) TO CONTINUE TO HOLD THE CM TO THE CORRECT ATTITUDE WITH RESPECT TO THE ATMOSPHERE FOR
034758,000275: # THE ONSET OF ENTRY DECELERATION. ROLL ANGLE IS LIFT UP/DOWN AS SPECIFIED BY HEADSUP.
034759,000276: # 3) TO SENSE .05 G
034760,000277: # CALLING SEQUENCE- DIRECTLY FROM P62
034761,000278: # EXIT- TO ENDOFJOB
034762,000279: # SUBROUTINE CALLS- NEWMODEX, GODSPR
034763,000280:
034764,000281: 26,2405 COUNT* $$/P63
034765,000282:
034766,000283: 26,2405 05354 P63 TC NEWMODEX
034767,000284: 26,2406 00077 MM 63 B-14
034768,000285:
034769,000286: # ARRIVE WITH EBANK = AOG.
034770,000287:
034771,000288: 26,2407 32430 CA ENTCADR # CONTINUE AT STARTENT AFTER CM/POSE.
034772,000289:
034773,000290: # AT END OF STARTENT, CHANGE ADDRESS IN GOTOADDR
034774,000291: # TO CONTINUE AT SCALEPOP THEREAFTER.
034775,000292:
034776,000293: 26,2410 55724 TS POSEXIT
034777,000294:
034778,000295: 26,2411 32427 CA V06N64 # G VI R TO SPLSH
034779,000296: # XXX.XX G XXXXX. FPS XXXX.X NM
034780,000297: 26,2412 55263 TS ENTRYVN # FOR DISPLAY CALL IN OVERNOUT.
034781,000298:
034782,000299: 26,2413 45017 CS ONE # IN CASE FLAG IS LEFT AT +1 BY DAP. THE
034783,000300: 26,2414 55727 TS P63FLAG # -1 ASSURES THAT EXO-ATM DAP WILL NOT
034784,000301: # CALL P63 OUT OF SEQUENCE IN P66.
034785,000302:
034786,000303: 26,2415 05412 TC PHASCHNG # THIS IS REQUIRED TO PRESERVE CLEANDSP
034787,000304: 26,2416 00004 OCT 00004 # RETURN IN EVENT OF AN EXTENDED VERB..
034788,000305:
034789,000306: 26,2417 04662 TC BANKCALL # FLUSH 'N22' DISPLAY, IF ON. (OMIT
034790,000307: 26,2420 20703 CADR CLEANDSP # DISPLAY DURING 'STARTENT' PASS.)
034791,000308:
034792,000309: 26,2421 05412 P63.1 TC PHASCHNG
034793,000310: 26,2422 00004 OCT 00004 # DISABLE. DISPLAY RESTARTED VIA ENTRY.
034794,000311:
034795,000312: 26,2423 05217 TC ENDOFJOB
034796,000313:
034797,000314: 26,2424 01474 V06N60 VN 0660
034798,000315: 26,2425 01475 V06N61 VN 0661
034799,000316: 26,2426 01477 V06N63 VN 0663
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Page 796
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034801,000318: 26,2427 01500 V06N64 VN 0664
034802,000319: 26,2430 52000 ENTCADR CADR STARTENT
034803,000320:
034804,000321: 26,2431 E7,1451 EBANK= RTINIT # TO CARY OVER INTO ENTRY STEERING.
034805,000322: 26,2431 03470 76067 POSECADR 2CADR CM/POSE
034806,000323:
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Page 797
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034808,000325: # PROGRAM- P64
034809,000326: # MOD NO.- 1 SEPT. 19, 1967
034810,000327: # MOD BY- R. HIRSCHKOP
034811,000328: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 8 MAY 68 REVISED COMMENTS FOR COLOSSUS
034812,000329: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 1 MAR '69 N74
034813,000330: # FUNCTION- 1. TO START ENTRY GUIDANCE AT .05G SELECTING ROLL ATTITUDE, CONSTANT DRAG LEVEL, AND
034814,000331: # DRAG THRESHOLD, KA, WHICH ARE KEYED TO THE .05G POINT.
034815,000332: # 2. SELECT FINAL PHASE P67 IF V < 27000 FPS WHEN .2G OCCURS.
034816,000333: # 3. ITERATE FOR UP-CONTROL SOLUTION P65 IF V > 27000 FPS AND IF ALTITUDE RATE AND DRAG
034817,000334: # LEVEL CONDITIONS ARE SATISFIED. ENTER P65 WHEN CONSTANT DRAG CONTROLLER HAS BROUGHT RANGE
034818,000335: # AS PREDICTED TO WITHIN 25 NM OF DESIRED RANGE.
034819,000336: # 4. SELECT FINAL PHASE P67 IF NO UP-CONTROL SOLUTION EXISTS WITH VL > 18000 FPS.
034820,000337: # CALLING SEQUENCE- BY RTB FROM REENTRY CONTROL
034821,000338: # EXIT- BACK TO REENTRY CONTROL
034822,000339: # SUBROUTINE CALLS- NEWMODEX
034823,000340:
034824,000341: 25,2000 BANK 25
034825,000342: 26,2000 SETLOC P60S1
034826,000343: 26,2000 BANK
034827,000344:
034828,000345: # THIS DISPLAY IS CALLED EACH PASS THROUGH STEERING. RESTART PROTECTION IS VIA STEERING.
034829,000346:
034830,000347: 26,2433 COUNT* $$/P64
034831,000348:
034832,000349: 26,2433 05354 P64 TC NEWMODEX # ENTER VIA RTB WHEN .05G IS EXCEEDED.
034833,000350: 26,2434 00100 MM 64 B-14
034834,000351: 26,2435 32440 CA V06N74 # ROLLC VI D
034835,000352: # XXX.XX DEG XXXXX. FPS XXX.XX G
034836,000353: 26,2436 55263 TS ENTRYVN # DISPLAY VIA OVERNOUT.
034837,000354:
034838,000355: 26,2437 06030 TC DANZIG # ... AND CONTINUE IN INITROLL ...
034839,000356:
034840,000357: 26,2440 01512 V06N74 VN 0674
034841,000358:
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Page 798
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034843,000360: # PROGRAM: P65
034844,000361: # MOD NO: 0 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP ADDITION.
034845,000362: # FUNCTION: TO CONTINUE ENTRY GUIDANCE, USING THE UP-CONTROL PHASE TO STEER TO A CONTROLLED EXIT
034846,000363: # CONDITION. THIS PHASE TERMINATES A) IF D < Q7 FPSS, GO TO P66 ,
034847,000364: # B) IF RDOT NEG, AND IF V < VL +500 FPS, GO TO P67.
034848,000365: # CALLING SEQUENCE: BY RTB FROM REENTRY CONTROL
034849,000366: # EXIT: BACK TO REENTRY CONTROL, OR TO ENDOFJOB.
034850,000367: # SUBROUTINE CALLS: NEWMODEX
034851,000368:
034852,000369: 26,2441 COUNT* $$/P65
034853,000370:
034854,000371: 26,2441 05354 P65 TC NEWMODEX # ENTER VIA RTB WHEN RANGE < 25 N M OF
034855,000372: 26,2442 00101 MM 65 B-14 # TARGET.
034856,000373:
034857,000374: 26,2443 35065 CA PRIO13
034858,000375: 26,2444 05134 TC NOVAC
034859,000376: 26,2445 1263 EBANK= ENTRYVN
034860,000377: 26,2445 02457 54062 2CADR P65.1
034861,000378:
034862,000379: 26,2447 05372 TC 2PHSCHNG # 2 PHASE CHG REQUIRED TO PREVENT RE-
034863,000380: 26,2450 00554 OCT 00554 # STARTING FLASHING DISPLAY TWICE.
034864,000381: 26,2451 10035 OCT 10035 # 4.55 SPOT AND SERVICER, HERE.
034865,000382: 26,2452 06006 TC INTPRET
034866,000383: 26,2453 47131 SSP RTB
034867,000384: 26,2454 03646 GOTOADDR # CHANGE ENTRY MODE TO UPCONTRL.
034868,000385: 26,2455 53035 UPCONTRL
034869,000386: 26,2456 52120 REFAZE10 # GO HERE TO REESTABLISH ENTRY SEQUENCER.
034870,000387: # AND CONTINUE AT UPCONTRL...
034871,000388:
034872,000389: 26,2457 05560 P65.1 TC DOWNFLAG
034873,000390: 26,2460 00134 ADRES ENTRYDSP # ENTRYDSP = 92D BIT 13 FLAG 6
034874,000391:
034875,000392: 26,2461 32473 CA V16N69 # ROLLC DL (Q7) VL
034876,000393: 26,2462 04662 TC BANKCALL # XXX.XX DEG XXX.XX G XXXXX. FPS
034877,000394: 26,2463 21057 CADR GOFLASHR
034878,000395: 26,2464 02461 TC -3 # NODOFLAG IS SET..
034879,000396: 26,2465 02470 TC +3
034880,000397: 26,2466 02461 TC -5
034881,000398: 26,2467 02232 TC P61.3 # EST. GRP 4 FOR DSPLAY AND DO ENDOFJOB
034882,000399: # IF PROCEED, CONTINUE.
034883,000400: 26,2470 05546 TC UPFLAG
034884,000401: 26,2471 00134 ADRES ENTRYDSP # ENTRYDSP = 92D BIT 13 FLAG 6
034885,000402:
034886,000403: 26,2472 02421 TC P63.1 # DISABLE GRP 4,START UP ENTRY DISPLAY
034887,000404: # N06V68 VIA OVERNOUT, AS USED IN P64.
034888,000405: 26,2473 04105 V16N69 VN 1669
034889,000406:
|
|
Page 799
|
034891,000408: # PROGRAM: P66
034892,000409: # MOD NO: 0 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP ADDITIONS.
034893,000410: # FUNCTION: KEEP CM ATTITUDE IN TRIM TO THE RELATIVE VELOCITY VECTOR. ENTRY GUIDANCE STOPS GENERATING
034894,000411: # ROLL COMMANDS UNTIL DRAG BUILDS UP TO Q7+0.5 FPSS.
034895,000412: # CALLING SEQUENCE: VIA RTB FROM REENTRY CONTROL.
034896,000413: # EXIT: BACK TO REENTRY CONTROL.
034897,000414: # SUBROUTINE CALLS: NEWMODEX
034898,000415:
034899,000416: 26,2474 COUNT* $$/P66
034900,000417:
034901,000418: 26,2474 05354 P66 TC NEWMODEX # ENTER VIA RTB WHEN D < Q7 FPSS
034902,000419: 26,2475 00102 MM 66 B-14
034903,000420:
034904,000421: 26,2476 35052 CA V06N22 # OGA IGA MGA
034905,000422: # XXX.XX DEG XXX.XX DEG XXX.XX DEG
034906,000423: 26,2477 02503 TC P66END # IN CASE CAME FROM P65, GO DISABLE GRP4,
034907,000424: # AND SET ENTRYDSP TO DO DISPLAY VIA
034908,000425: # OVERNOUT.
034909,000426:
034910,000427: # ... AND CONTINUE AT KEP2
034911,000428:
|
|
Page 800
|
034913,000430: # P67
034914,000431:
034915,000432: # PROGRAM- P67
034916,000433: # MOD NO.- 0 MAR. 16, 1967
034917,000434: # MOD BY- R. HIRSCHKOP
034918,000435: # FUNCTION- TO TERMINATE STEERING WHEN THE CM VELOCITY WRT EARTH = 1000 FT/SEC
034919,000436: # CALLING SEQUENCE-
034920,000437: # EXIT- TO POOH
034921,000438: # SUBROUTINE CALLS- GOFLASH
034922,000439:
034923,000440: # THIS DISPLAY IS CALLED EACH PASS THROUGH STEERING. RESTART PROTECTION IS VIA STEERING.
034924,000441:
034925,000442: 26,2500 COUNT* $$/P67
034926,000443:
034927,000444: 26,2500 05354 P67 TC NEWMODEX # ENTER VIA RTB
034928,000445: 26,2501 00103 MM 67 B-14
034929,000446: 26,2502 32511 CA V06N66 # ROLLC XRNGERR DNRNGERR
034930,000447: # XXX.XX DEG XXXX.X NM XXXX.X NM
034931,000448: 26,2503 55263 P66END TS ENTRYVN # DISPLAY VIA OVERNOUT.
034932,000449:
034933,000450: 26,2504 05546 TC UPFLAG # (IN CASE CAME FROM P65. ENTRY DISPLAY
034934,000451: 26,2505 00134 ADRES ENTRYDSP # WILL FLUSH FLASHING DISP. IF STILL ON)
034935,000452: # BIT 13 FLAG 6
034936,000453: 26,2506 05412 KILLGRP4 TC PHASCHNG # DISABLE GRP4, IN CASE CAME FROM HUNTEST.
034937,000454: 26,2507 00004 OCT 00004 # (COME TO KILLGRP4 VIA RTB, RET TO CALLER)
034938,000455:
034939,000456: 26,2510 06030 TC DANZIG # ... AND CONTINUE AT PREDICT3 ...
034940,000457:
034941,000458: 26,2511 01502 V06N66 VN 0666
034942,000459:
034943,000460: 26,2512 BANK 26
034944,000461: 26,2000 SETLOC P60S2
034945,000462: 26,2000 BANK
034946,000463:
034947,000464: 26,2512 32543 P67.1 CA V16N67 # RTOGO LAT LONG
034948,000465: # XXXX.X NM XXX.XX DEG XXX.XX DEG
034949,000466: 26,2513 04662 TC BANKCALL
034950,000467: 26,2514 20720 CADR GOFLASH
034951,000468: 26,2515 02520 TC +3 # EFFECTIVE GOTOPOOH
034952,000469: 26,2516 02520 TC +2
034953,000470: 26,2517 02512 TC P67.1 # REDO
034954,000471:
034955,000472: 26,2520 46214 CS THREE # TURN OFF ENTRY DAP
034956,000473: 26,2521 00004 INHINT
034957,000474: 26,2522 70102 MASK CM/FLAGS # CM/DSTBY, GAMDIFSW
034958,000475: 26,2523 54102 TS CM/FLAGS
034959,000476: 26,2524 00003 RELINT
034960,000477: 26,2525 00006 EXTEND
034961,000478: 26,2526 32643 DCA SERVCAD2
034962,000479:
|
|
Page 801
|
034964,000481: 26,2527 53223 DXCH AVEGEXIT
034965,000482:
034966,000483: 26,2530 14106 TCF GOTOPOOH
034967,000484:
|
|
Page 802
|
034969,000486: 26,2531 43175 P67.2 VLOAD CLEAR # CALC PRESENT LAT, LONG, ALT.
034970,000487: 26,2532 01171 RN
034971,000488: 26,2533 00662 ERADFLAG # USE PAD RAD FOR ALT. (NOT SEEN ANYWAY)
034972,000489: 26,2534 16152 STODL ALPHAV
034973,000490: 26,2535 01205 PIPTIME # USE TIME OF RN
034974,000491: 26,2536 45014 CLEAR CALL
034975,000492: 26,2537 01663 LUNAFLAG
034976,000493: 26,2540 26370 LAT-LONG
034977,000494: 26,2541 77634 P67.3 RTB # ENTRY EXIT THAT OMITS DISPLAY.
034978,000495: 26,2542 53611 SERVNOUT
034979,000496:
034980,000497: 26,2543 04103 V16N67 VN 1667
034981,000498: 26,2544 4270 OCT41 = 33DEC
034982,000499: 26,2544 26,2642 SERVCAD2 = SERVCAD1
034983,000500:
|
|
Page 803
|
034985,000502: # SUBROUTINE NAME: S61.1
034986,000503: # MOD NO: 0 DATE: 21 FEB 67
034987,000504: # MOD BY: RR BAIRNSFATHER LOG SECTION: P61-P67
034988,000505: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 22 JUN 67 RESTARTS.
034989,000506:
034990,000507: # FUNCTIONAL DESCRIPTION: CALLED BY BOTH P61 AND P62
034991,000508: # FIRST, TEST TO SEE IF AVERAGEG IS ON. IF NOT, UPDATE THE STATE VECTOR TO PRESENT TIME + TOLERANCE
034992,000509: # AND TURN ON AVERAGEG AT THAT TIME, AND CONTINUE. OTHERWISE CONTINUE: SEE IF IMU Y AXIS IS
034993,000510: # WITHIN 30 DEG OF V*R. IF YES, EXIT SUBROUTINE S61.1. IF NO, SEE IF -Y AXIS OF IMU IS WITHIN
034994,000511: # 30 DEG OF V*R. IF YES, DISPLAY ALARM: 01427 IMU REVERSED.
034995,000512: # IF NO, DISPLAY ALARM: 01426 IMU UNSATISFACTORY.
034996,000513: # IN EITHER OF THESE LAST 2 CASES, WAIT 10 SEC AND THEN EXIT SUBROUTINE S61.1.
034997,000514:
034998,000515: # REMARK: THERE WILL BE A SHORT 10 SEC DELAY IF AN ALARM EXIT IS TAKEN. THE DELAY FOR INTEGRATION IS
034999,000516: # AS SHORT AS CAN BE MADE, BUT IS ARBITRARY SINCE IT DEPENDS ON THE AGE OF THE STATE VECTOR.
035000,000517:
035001,000518: # CALLING SEQUENCE: CALL
035002,000519: # S61.1
035003,000520:
035004,000521: # C(MPAC) UNSPECIFIED
035005,000522: # PUSHLOC UNSPECIFIED
035006,000523:
035007,000524: # SUBROUTINES CALLED: LOADTIME, CSMPREC, TPAGREE,
035008,000525: # WAITLIST, JOBSLEEP, JOBWAKE, PREREAD, ALARM, GODSPR, BANKCALL, DELAYJOB
035009,000526:
035010,000527: # NORMAL EXIT MODES: RVQ
035011,000528:
035012,000529: # ALARMS: 01426 IMU UNSATISFACTORY
035013,000530: # 01427 IMU REVERSED
035014,000531:
035015,000532: # OUTPUT: POSSIBLE ALARMS
035016,000533: # POSSIBLY TDEC1, RATT, VATT, RN, VN
035017,000534:
035018,000535: # ERASABLE INITIALIZATION REQUIRED:
035019,000536: # AVEGFLAG AVERAGEG ON OR OFF LEFT BY SERVICER
035020,000537: # PIPTIME (-28) CS TIME OF PIPA UPDATE LEFT BY READACCS
035021,000538: # RN (-29) M STATE VECTOR LEFT BY AVERAGEG
035022,000539: # VN (-7) M/CS STATE VECTOR LEFT BY AVERAGEG
035023,000540: # REFSMMAT (-1) .5 REF TO SM MATRIX LEFT BY LAST IMU ALIGNMENT
035024,000541:
035025,000542: # DEBRIS: QPRET
035026,000543: # POSSIBLY PIPTIME1, RATT, VATT, TDEC1, RN1, VN1, QTEMP, X1 IF UPDATED
035027,000544: # PUSH LIST LOCS USED BY CSMPREC
035028,000545:
035029,000546: 26,2544 E6,1661 EBANK= AOG # FOR 60GENRET, S61DT
035030,000547: 26,2544 BANK 26
035031,000548: 26,2000 SETLOC P60S3
035032,000549: 26,2000 BANK
035033,000550:
035034,000551: 26,2544 COUNT* $$/S61.1
035035,000552:
035036,000553: 26,2544 00006 S61.1 EXTEND
035037,000554: 26,2545 23773 QXCH 60GENRET # SAVE RET ADDR IN EB 6
035038,000555: 26,2546 04662 TC BANKCALL
035039,000556: 26,2547 17653 CADR R02BOTH
035040,000557: 26,2550 06006 TC INTPRET
|
|
Page 804
|
035042,000559: 26,2551 45014 BON CALRB
035043,000560: 26,2552 00716 AVEGFLAG # IS AVERAGEG ON
035044,000561: 26,2553 54604 S61.1A # YES
035045,000562: 26,2554 27543 MIDTOAV2 # GET FUTURE STATE VECTOR SOON AS CAN
035046,000563:
035047,000564: 26,2555 30155 CA MPAC +1 # RETURN INHINTED ***
035048,000565: 26,2556 55774 TS S61DT # FOR RESTART.
035049,000566: 26,2557 05245 TC WAITLIST
035050,000567: 26,2560 E7,1431 EBANK= DVCNTR
035051,000568: 26,2560 02565 54067 2CADR S61.1C
035052,000569:
035053,000570: 26,2562 05412 TC PHASCHNG
035054,000571: 26,2563 40434 OCT 40434
035055,000572: 26,2564 05217 TC ENDOFJOB
035056,000573:
035057,000574: 26,2565 35065 S61.1C CA PRIO13
035058,000575: 26,2566 05147 TC FINDVAC
035059,000576: 26,2567 E6,1661 EBANK= AOG
035060,000577: 26,2567 02603 54066 2CADR S61.1A -1
035061,000578:
035062,000579: 26,2571 00006 EXTEND
035063,000580: 26,2572 32643 DCA SERVCAD1 # HE WHO STARTS AVERAGEG MUST SERVICE
035064,000581: 26,2573 53223 DXCH AVEGEXIT # THE EXIT.
035065,000582:
035066,000583: 26,2574 05372 TC 2PHSCHNG
035067,000584: 26,2575 00454 OCT 00454
035068,000585: 26,2576 00415 OCT 00415
035069,000586:
035070,000587: 26,2577 35060 CA EBENTRY # SET EB= 7 FOR PREREAD.
035071,000588: 26,2600 54003 TS EBANK
035072,000589:
035073,000590: 26,2601 04701 TC POSTJUMP
035074,000591: 26,2602 76701 CADR PREREAD # PREREAD DOES TC TASKOVER.
035075,000592:
035076,000593: 26,2603 06006 TC INTPRET
035077,000594: 26,2604 77204 S61.1A BOVB VLOAD
035078,000595: 26,2605 57352 TCDANZIG # TURN OFF OVFIND, IF ON
035079,000596: 26,2606 01177 VN # VN (-7) M/CS
035080,000597: 26,2607 64235 VXV MXV
035081,000598: 26,2610 01171 RN # RN (-29) M
035082,000599: 26,2611 01736 REFSMMAT # .5 UNIT MATRIX
035083,000600: 26,2612 71256 UNIT DLOAD
035084,000601: 26,2613 00160 MPAC +3 # GET COS(THETA)/2
035085,000602: 26,2614 43240 BMN DAD
035086,000603: 26,2615 54622 S61.1B # DO TEST ON -YSM
035087,000604: 26,2616 14645 C(30)LIM # = 1.0 -.5 COS(30)
035088,000605: 26,2617 47004 BOVB RTB
035089,000606: 26,2620 54641 RETRN1
035090,000607: 26,2621 54626 RETRN3
|
|
Page 805
|
035092,000609: 26,2622 43276 S61.1B DCOMP DAD
035093,000610: 26,2623 14645 C(30)LIM # = 1.0 - .5 COS(30)
035094,000611: 26,2624 77404 BOVB EXIT
035095,000612: 26,2625 54631 RETRN2
035096,000613:
035097,000614: 26,2626 05650 RETRN3 TC ALARM
035098,000615: 26,2627 01426 OCT 01426 # IMU UNSATISFACTORY
035099,000616: 26,2630 02633 TC RETRN2 +2
035100,000617:
035101,000618: 26,2631 05650 RETRN2 TC ALARM
035102,000619: 26,2632 01427 OCT 01427 # IMU REVERSED
035103,000620:
035104,000621: 26,2633 35050 +2 CAF V05N09
035105,000622: 26,2634 04662 TC BANKCALL
035106,000623: 26,2635 20676 CADR GODSPR # DO DISPLAY
035107,000624: 26,2636 32646 CA 10SECS
035108,000625: 26,2637 04662 TC BANKCALL
035109,000626: 26,2640 01732 CADR DELAYJOB
035110,000627:
035111,000628: 26,2641 01773 RETRN1 TC 60GENRET
035112,000629:
035113,000630: 26,2642 E7,1431 EBANK= DVCNTR
035114,000631: 26,2642 03227 76067 SERVCAD1 2CADR SERVEXIT
035115,000632:
035116,000633: 26,2644 22111 17335 C(30)LIM 2DEC .566985 # = 1.0 - .5 COS(30)
035117,000634:
035118,000635: 26,2646 01750 10SECS DEC 1000 B-14 # 1000 CS
035119,000636: 26,2647 00000 13560 60SECDP 2DEC 6000 B-28 # 6000 CS
035120,000637:
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|
Page 806
|
035122,000639: # PROGRAM NAME: S61.2 DATE: 14 FEB 67
035123,000640: # MOD NO: 1 LOG SECTION: P61-P67
035124,000641: # MOD BY: MORTH / BAIRNSFATHER
035125,000642: # MOD NO: 2 MOD BY: MORTH/BAIRNSFATHER DATE: 11 MAY 67 ADD 2ND ITER FOR ERAD AT 400K FT.
035126,000643: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 21 NOV 67 VARIABLE MU ADDED.
035127,000644: # MOD NO: 4 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 68 DIFFERENT EARTH/MOON SCALES IN TFF'S
035128,000645:
035129,000646: # FUNCTIONAL DESCRIPTION: CALLED BY P61. PROVIDES DISPLAYS FOR NOUNS N60 AND N63 .
035130,000647: # PROGRAM CALCULATES ENTRY DISPLAY OF MAXIMUM ACCELERATION EXPECTED (GMAX) AND ALSO THE EXPECTED
035131,000648: # INERTIAL VELOCITY (VPRED) AND ENTRY ANGLE (GAMMAEI) THAT WILL OBTAIN AT 400K FT ABOVE THE FISCHER
035132,000649: # ELLIPSOID. PROGRAM ALSO CALCULATES A SECOND DISPLAY RELATIVE TO THE EMSALT ABOVE FISCHER ELLIPSOID
035133,000650: # AND CONSISTS OF RANGE TO SPLASH FROM NOW (RTGO) , PREDICTED INERTIAL VELOCITY (VIO) , AND THE TIME TO
035134,000651: # GO FROM NOW (TTE) .
035135,000652:
035136,000653: # CALLING SEQUENCE: CALL
035137,000654: # S61.2
035138,000655: # C(MPAC) UNSPECIFIED
035139,000656: # PUSHLOC WILL BE SET TO ZERO.
035140,000657:
035141,000658: # SUBROUTINES CALLED: TFFCONIC, CALCTFF, TFF/TRIG, FISHCALC, GETERAD, VGAMCALC
035142,000659:
035143,000660: # NORMAL EXIT MODES: RTB P61.1
035144,000661:
035145,000662: # ALARMS: NONE
035146,000663:
035147,000664: # OUTPUT: THE FOLLOWING REGISTERS ARE WRITTEN IN FOR USE BY DISPLAYS
035148,000665: # GMAX 100 GMAX (-14) G,S MAXIMUM ACCELERATION
035149,000666: # VPRED (-7) M/CS PREDICTED VELOCITY AT 400K FT
035150,000667: # GAMMAEI GAMMA/360 PREDICTED GAMMA AT 400K FT
035151,000668: # FOR TM, DP(GAMMAEI) = (GAMMAEI, RTGO) / 360
035152,000669: # RTGO THETAH/360 RANGE ANGLE TO SPLASH FROM EMSALT EMSALT IS PAD LOADED
035153,000670: # VIO (-7) M/CS INERTIAL VELOCITY AT EMSALT EMSALT IS PAD LOADED
035154,000671: # TTE (-28) CS TIME TO EMSALT EMSALT IS PAD LOADED
035155,000672: # PUSHLOC = 0
035156,000673: # CONIC PARAMETERS STORED IN VAC AREA (SEE TFF SUBROUTINES)
035157,000674:
035158,000675: # ERASABLE INITIALIZATION REQUIRED:
035159,000676: # RONE (-29) M STATE VECTOR LEFT BY USER
035160,000677: # VONE (-7) M/CS STATE VECTOR LEFT BY USER
035161,000678: # URONE UR/2 LEFT BY USER
035162,000679: # UNI (-1) UNIT NORMAL V*R LEFT BY ENTRY / P61
035163,000680: # THETAH THETAH/360 RANGE ANGLE LEFT BY ENTRY / P61
035164,000681: # UNITW (0) UNIT POLAR VECTOR LEFT BY PAD LOAD
035165,000682: # EMSALT (-29) M EMS INTERFACE ALTITUDE LEFT BY PAD LOAD
035166,000683: # ORBITAL REENTRY: 284643 FT, LUNAR REENTRY: 297431 FT.
035167,000684:
035168,000685: # DEBRIS: QPRET,
035169,000686: # ALL PDL LOCATIONS ABOVE 12D, INCLUDING X1,X2,S1,S2
035170,000687: # ALSO PDL+0 ... PDL+5, WHERE INITIAL PUSHLOC = PDL
035171,000688:
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|
Page 807
|
035173,000690: # THE FOLLOWING PUSH LIST LOCATIONS HAVE BEEN RESERVED FOR TFF ROUTINES AND ARE REPEATED HERE FOR CONVENIENCE.
035174,000691: # OF COURSE FOR S61.2 USAGE, EARTH ORIGIN SCALING IS USED.
035175,000692:
035176,000693: # BELOW E: IS USED FOR EARTH ORIGIN SCALE
035177,000694: # M: IS USED FOR MOON ORIGIN SCALE
035178,000695:
035179,000696: # RTERM = 18D TERMINAL RADIUS M E: (-29) M: (-27)
035180,000697: # NRTERM = 16D TERMINAL RADIUS M E: (-29+NR)
035181,000698: # M: (-27+NR)
035182,000699: # RMAG1 = 12D PRESENT RADIUS M E: (-29) M: (-27)
035183,000700: # NRMAG = 32D PRESENT RADIUS M E: (-29+NR)
035184,000701: # M: (-27+NR)
035185,000702: # SDELF/2 SIN(THETA) / 2
035186,000703: # CDELF/2 = 14D COS(THETA) / 2
035187,000704: # TFFX = 34D X, ARGUMENT OF SERIES T(X).
035188,000705: # TFFTEM = 36D ARG FOR TRANSFER ANGLE CALCULATION.
035189,000706: # TFFNP = 28D LC P M E: (-38+2NR) M: (-36+2NR)
035190,000707: # TFF/RTMU= 30D 1/SQRT(MU) E: (17) M: (14)
035191,000708: # TFFVSQ = 20D -(VN.VN/MU) 1/M E: (20) M: (18)
035192,000709:
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|
Page 808
|
035194,000711: 34,3763 BANK 34
035195,000712: 26,2000 SETLOC P60S2
035196,000713: 26,2000 BANK
035197,000714:
035198,000715: 26,2651 COUNT* $$/S61.2
035199,000716: # PDL LEFT AT ZERO BY TARGETNG
035200,000717:
035201,000718: 26,2651 45345 S61.2 DLOAD DSU
035202,000719: 26,2652 02020 EMSALT
035203,000720: 26,2653 15001 290KFT
035204,000721: 26,2654 71244 BPL DLOAD
035205,000722: 26,2655 54775 LUNENT
035206,000723: 26,2656 17354 1/RTMU # ESTABLISH MU FOR ORBITAL ENTRIES
035207,000724: 26,2657 77624 CALLCON CALL
035208,000725: 26,2660 56757 TFFCONIC # FILL VAC AREA WITH CONIC PARAMETERS
035209,000726:
035210,000727: 26,2661 45145 DLOAD CALL
035211,000728: 26,2662 15021 RTRIAL # 1ST GUESS AT TERMINAL RADIUS (-29)
035212,000729: 26,2663 57067 CALCTFF # SAVES MPAC IN RTERM (18D)
035213,000730:
035214,000731: 26,2664 77624 CALL # CALC SDELF/2, CDELF/2
035215,000732: 26,2665 56631 TFF/TRIG # RETURN WITH S(THETA) IN MPAC
035216,000733:
035217,000734: 26,2666 77624 CALL # GET FISCHER RADIUS (-29) M
035218,000735: 26,2667 55030 FISHCALC # ANS IN MPAC AND IN ERADM.
035219,000736:
035220,000737: 26,2670 45015 DAD CALL
035221,000738: 26,2671 02020 EMSALT
035222,000739: 26,2672 57067 CALCTFF # SAVES MPAC IN RTERM (18D)
035223,000740:
035224,000741: 26,2673 77676 DCOMP # NEGATIVE AS IN COUNTDOWN.
035225,000742: 26,2674 03733 STORE TTE1 # DECR TTE FROM BASE TTE1. (RESTART)
035226,000743: # DNLIST AND DSKY WILL USE TTE.
035227,000744: 26,2675 37727 STCALL TTE # LET MISS CONTRL DECR BY ELAPSED TIME
035228,000745: # TTE= TIME FROM NOW TO EMSALT +FISCHER
035229,000746:
035230,000747: 26,2676 56631 TFF/TRIG # S(THETA) IN MPAC ON RETURNING
035231,000748: # AND THETA= RANGE FROM NOW TO EMSALT
035232,000749:
035233,000750: 26,2677 77624 CALL
035234,000751: 26,2700 55030 FISHCALC
035235,000752: 26,2701 77624 CALL
035236,000753: 26,2702 56664 VRCALC
035237,000754: 26,2703 77624 CALL
035238,000755: 26,2704 56651 DISPTARG
035239,000756: 26,2705 77624 CALL
035240,000757: 26,2706 56651 DISPTARG
035241,000758: 26,2707 37714 STCALL RTGO
|
|
Page 809
|
035243,000760: 26,2710 55051 VGAMCALC
035244,000761:
035245,000762: 26,2711 77605 DMP # MPAC = GAMMA
035246,000763: # PDL0 HAS VGAM.
035247,000764: 26,2712 43265 BDDV DAD
035248,000765: 26,2713 15027 VEMSCON # -HS D 180/PI (-14)
035249,000766: 26,2714 00001 0 # VGAM FROM PDL0.
035250,000767: 26,2715 17725 STODL VIO # PREDICTED VELOCITY AT EMSALT.
035251,000768:
035252,000769: # GAMMA AND VGAM AT 300K FT ARE REQUIRED BY GMAX
035253,000770: # ALGORITHM.
035254,000771:
035255,000772: 26,2716 02241 ERADM # EARTH RADIUS FROM GETERAD (-29) M
035256,000773: # = FISCHER RADIUS (-29)
035257,000774:
035258,000775: 26,2717 77615 DAD
035259,000776: 26,2720 06462 300KFT # M (-29)
035260,000777: 26,2721 34023 STCALL RTERM # TERMINAL RADIUS M (-29)
035261,000778:
035262,000779: 26,2722 55046 PREVGAM # VGAMCALC WITH NEW RTERM
035263,000780:
035264,000781: # VBAR = (V(FPS) - 36KF/S) / 20KF/S
035265,000782: # GMAX = (4/(1 + 4.8 VBARSQ))(GAM - 6.05 - 2.4 VBARSQ) - 10(L/D - .3) + 10 ASSUME L/D = 0.3, BANK =0.
035266,000783:
035267,000784: # GMAXCALC
035268,000785: 26,2723 45325 PDDL DSU # GAM TO PDL2
035269,000786: 26,2724 00001 0 # VGAM IS IN PDL0 (-7)
035270,000787: 26,2725 15005 36KFT/S # (-7) M/CS
035271,000788: 26,2726 63471 DDV DSQ
035272,000789: 26,2727 15007 20KFT/S # (-6) M/CS
035273,000790: 26,2730 00001 STORE 0 # VBARSQ (-2) TO PDL0
035274,000791:
035275,000792: 26,2731 43205 DMP DAD
035276,000793: 26,2732 15011 KR1
035277,000794: # GAM, POS DOWN, FROM PDL2
035278,000795: 26,2733 41215 DAD DMP
035279,000796: 26,2734 15013 -6.05DEG
035280,000797: 26,2735 15015 KR2
035281,000798: 26,2736 77725 PDDL # XCH PDL+0 FOR VBARSQ (-2)
035282,000799: 26,2737 43271 DDV DAD
035283,000800: 26,2740 15025 KR4
035284,000801: 26,2741 17366 DP2(-4)
035285,000802: 26,2742 77665 BDDV
035286,000803: # NUM FROM PDL+0
035287,000804: 26,2743 51015 DAD BPL
035288,000805: 26,2744 15017 KR3
035289,000806: 26,2745 54750 +3
035290,000807: 26,2746 77745 DLOAD
035291,000808: 26,2747 15335 HI6ZEROS
035292,000809: 26,2750 17722 STODL GMAX # 100 GMAX (-14)
|
|
Page 810
|
035294,000811: # DISPLAY USES GMAX AS SP, SO LO WORD IS WRITTEN OVER BY VPRED.
035295,000812: 26,2751 02241 ERADM # = FISCHER RADIUS (-29) M
035296,000813: 26,2752 45015 DAD CALL # 2 ND ITERATION FOR FISCHER RADIUS
035297,000814: 26,2753 15023 400KFT
035298,000815: 26,2754 57067 CALCTFF # ESTABLISH TRANSFER ANGLE DATA.
035299,000816: 26,2755 77624 CALL
035300,000817: 26,2756 56631 TFF/TRIG # GET SIN, COS DELF
035301,000818: 26,2757 77624 CALL
035302,000819: 26,2760 55030 FISHCALC # GET CORRESPONDING FISCHER RADIUS.
035303,000820:
035304,000821: 26,2761 73015 DAD LXA,2 # SAVE HI-WORD FOR DOWNLIST.
035305,000822: 26,2762 15023 400KFT # M (-29)
035306,000823: 26,2763 03713 RTGO # (RANGE ANGLE FROM EMSALT) / 360
035307,000824: 26,2764 34023 STCALL RTERM
035308,000825: 26,2765 55046 PREVGAM # VGAMCALC WITH NEW RTERM
035309,000826:
035310,000827: 26,2766 67076 DCOMP SXA,2 # HI-WORD OF EACH ON DOWNLIST.
035311,000828: 26,2767 00155 MPAC +1
035312,000829: 26,2770 17771 STODL GAMMAEI # CONIC GAMMA/360 AT 400K FT. (HI-WORD)
035313,000830: # CONIC RTGO/360 FROM EMSALT (LOW-WORD)
035314,000831: # FOR TM, DP(GAMMAEI) = (GAMMA, RTGO) / 360
035315,000832:
035316,000833: # VGAM FROM PDL+0 (-7)
035317,000834: 26,2771 77626 STADR
035318,000835: 26,2772 74010 STORE VPRED # CONIC VELOCITY AT 400K FT
035319,000836:
035320,000837: 26,2773 77634 RTB
035321,000838: 26,2774 54267 P61.1
035322,000839: # PDL BACK TO ZERO.
035323,000840:
035324,000841: 26,2775 52145 LUNENT DLOAD GOTO
035325,000842: 26,2776 06456 1/RTMUE # ESTABLISH MU FOR LUNAR TYPE ENTRIES
035326,000843: 26,2777 54657 CALLCON
035327,000844: 26,3000 00002 26244 290KFT 2DEC 88392.0 B-29
035328,000845:
035329,000846: 26,3002 00052 05716 KTETA1 2DEC* .421844723 E2 B-14* # 1100 2PI/16384(163.84)
035330,000847:
035331,000848: 26,3004 33335 05707 36KFT/S 2DEC 109.728 B-7 # (-7) M/CS = 36 KFT/S (-7)
035332,000849:
035333,000850: 26,3006 36365 30244 20KFT/S 2DEC 121.92 B-7 # (-6) M/CS = 2 20KFT/S (-7)
035334,000851:
035335,000852: 26,3010 77113 42770 KR1 2DEC -.026666667 # = -2.4 4 / 360
035336,000853:
035337,000854: 26,3012 77354 65030 -6.05DEG 2DEC -.016805556 # = -6.05 / 360
035338,000855:
035339,000856: 26,3014 21450 00001 KR2 2DEC .54931641 # = (360/4) 100 (-14) = 9000 B-14
035340,000857:
035341,000858: 26,3016 01750 00000 KR3 2DEC 1000 B-14 # = 100 (10.0) (-14) G,S
|
|
Page 811
|
035343,000860: # ASSUMES L/D = 0.3, BANK =0.
035344,000861: 26,3020 00305 04541 RTRIAL 2DEC 6460097.18 B-29 # RPAD +284643 FT =21 194 545 FT
035345,000862: # RPAD DEFINED AS 20 909 901.57 FT =6 373 338 M
035346,000863: 26,3022 00003 27040 400KFT 2DEC 121920 B-29 # METERS
035347,000864:
035348,000865: # 300KFT 2DEC 91440 B-29 (-29) M
035349,000866:
035350,000867: # EMSALT 2DEC 86759.2 B-29 284643 FT (-29) M (ORBITAL REENTRY)
035351,000868:
035352,000869: # EMSALT 2DEC 90657 B-29 297431 FT (-29) M (LUNAR REENTRY)
035353,000870:
035354,000871: 26,3024 32525 12525 KR4 2DEC .833333333
035355,000872:
035356,000873: 26,3026 23,2461 300KFT EQUALS MINPERE
035357,000874: 26,3026 77777 76601 VEMSCON 2DEC -.0389676 B-14 # = -HS D / 2 PI (-14) M SQ / CS SQ
035358,000875:
035359,000876: # = -16369 .05G 32.2 .3048 .3048/2 PI (-14)
035360,000877:
|
|
Page 812
|
035362,000879: # SUBROUTINE NAME: FISHCALC (USED BY S61.2) DATE: 01.21.67
035363,000880: # MOD NO: 0 LOG SECTION: P61-P67
035364,000881: # MOD BY: MORTH / BAIRNSFATHER
035365,000882: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 MAY 67 INCLUDE GETERAD CALL
035366,000883:
035367,000884: # FUNCTIONAL DESCRIPTION: GIVEN THE PRESENT POSITION, UNITR, CALCULATE A NEW UNITR THAT IS ROTATED THROUGH
035368,000885: # TRANSFER ANGLE, THETA, ALONG TRAJECTORY. THEN CALCULATE SIN(LAT) AND USE TO OBTAIN FISCHER RADIUS.
035369,000886:
035370,000887: # SINCE FISHCALC USES UNI (LEFT BY ENTRY) EARTH SCALING IS ASSUMED. (WILL IMPROVE FOR SUITABLE TENNANT)
035371,000888:
035372,000889: # CALLING SEQUENCE: CALL
035373,000890: # FISHCALC
035374,000891: # ENTER WITH .5 SIN(THETA) IN MPAC.
035375,000892: # PUSHLOC IS AT PDL+0, AN ARBITRARY BASE VALUE IF LEQ 8D
035376,000893:
035377,000894: # SUBROUTINES CALLED: GET ERAD
035378,000895:
035379,000896: # NORMAL EXIT MODE: RVQ
035380,000897:
035381,000898: # EXIT MODES: NONE
035382,000899:
035383,000900: # OUTPUT: ERADM (-29) M IN MPAC ON RETURNING
035384,000901: # NEW UNIT VECTOR NOT SAVED.
035385,000902: # SIN(LAT) NOT SAVED.
035386,000903: # PUSHLOC AT PDL+0
035387,000904:
035388,000905: # ERASEABLE INITIALIZATION REQUIRED:
035389,000906: # SDELF/2 =SIN(THETA) / 2, IN MPAC LEFT BY TFF/TRIG
035390,000907: # CDELF/2 =COS(THETA) / 2, STORED IN PDL 14D LEFT BY TFF/TRIG
035391,000908: # RONE (-29) M LEFT BY USER
035392,000909: # VONE (-7) M/CS LEFT BY USER
035393,000910: # URONE UR/2 LEFT BY USER
035394,000911: # UNI .5 UNIT(V*R) LEFT BY ENTRY / P61
035395,000912: # UNITW UNIT NORTH POLE LEFT BY PAD LOAD
035396,000913:
035397,000914: # DEBRIS: QPRET, PDL+0 ... PDL+5
035398,000915: # - - -
035399,000916: 26,3030 47315 FISHCALC PDVL VXV # URPR = UR CDELF + UHOR SDELF
035400,000917: 26,3031 02343 URONE
035401,000918: 26,3032 03502 UNI
035402,000919: 26,3033 76561 VXSC VSL1
035403,000920: # SIN(THETA) / 2 FROM PDL+0
035404,000921: 26,3034 74315 PDVL VXSC # TO PDL+0, +5
035405,000922: 26,3035 02343 URONE
035406,000923: 26,3036 00017 CDELF/2 # COS(THETA) / 2
035407,000924: 26,3037 45455 VAD STADR
035408,000925: 26,3040 74235 STORE URH # FOR USE IN RTGO FROM EMS DISPLAY
035409,000926: 26,3041 72441 DOT SL1
035410,000927: 26,3042 01714 UNITW # FULL UNIT VECTOR UNIT NORTH
035411,000928: 26,3043 02156 STORE ALPHAV +4 # = .5 SIN(LAT)
035412,000929: 26,3044 77650 DUMPFISH GOTO
035413,000930: 26,3045 26505 GETERAD # SAVES FISCHER RAD (-29) M IN ERADM AND
035414,000931: # IN MPAC. RETURNS TO CALLER VIQ QPRET.
035415,000932:
|
|
Page 813
|
035417,000934: # SUBROUTINE NAME: VGAMCALC (USED BY S61.2) DATE: 01.21.67
035418,000935: # MOD NO: 0 LOG SECTION: P61-P67
035419,000936: # MOD BY: MORTH / BAIRNSFATHER
035420,000937: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67
035421,000938: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 21 NOV 67 VARIABLE MU ADDED.
035422,000939: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 68 ACCEPT DIFFERENT EARTH/MOON SCALE
035423,000940:
035424,000941: # FUNCTIONAL DESCRIPTION: EARTH CENTERED VIS VIVA CALCULATION OF TERMINAL VELOCITY AND GAMMA (REL TO
035425,000942: # HORIZONTAL) GIVEN THE SCALAR QUANTITIES: PRESENT RADIUS AND VELOCITY AND THE TERMINAL RADIUS.
035426,000943: # THE USER MUST APPEND PROPER SIGN TO GAMMA, SINCE IT IS CALCULATED AS A POSITIVE NUMBER.
035427,000944: # THE EQUATIONS ARE
035428,000945:
035429,000946: # VGAM = SQRT(VN VN/MU + 2(RN-RTERM)/(RN RTERM) ) RTMU
035430,000947:
035431,000948: # COSGAM = H / RTERM VGAM = SQRT (LCP) / (RTERM VGAM/RTMU)
035432,000949:
035433,000950: # VGAMCALC ASSUMES THAT THE TERMINAL RADIUS IS LESS THAN THE PRESENT RADIUS. BOTH CALCTFF AND CALCTPER
035434,000951: # MAKE THIS ASSUMPTION.
035435,000952:
035436,000953: # CALLING SEQUENCE: CALL STCALL RTERM
035437,000954: # VGAMCALC PREVGAM
035438,000955: # PUSHLOC AT PDL+0, ARBITRARY IF LEQ 12D
035439,000956: # C(MPAC) UNSPECIFIED C(MPAC)=NEW RTERM
035440,000957:
035441,000958: # SUBROUTINES CALLED: NONE
035442,000959:
035443,000960: # NORMAL EXIT MODE: RVQ
035444,000961:
035445,000962: # ALARMS: NONE
035446,000963: #
035447,000964: # OUTPUT: GAMMA / 360 IN MPAC, POSITIVE NUMBER
035448,000965: # VGAM E: (-7) M: (-5) M/CS IN PDL+0
035449,000966: # PUSHLOC AT PDL+2
035450,000967:
035451,000968: # ERASABLE INITIALIZATION REQD:
035452,000969: # TFF/RTMU E: (17) M: (14) 1/SQRT(MU) LEFT BY TFFCONIC.
035453,000970: # RMAG1 E: (-29) M: (-27) M PRESENT RADIUS LENGTH LEFT BY TFFCONIC
035454,000971: # NRMAG E: (-29+NR) M NORM LENGTH OF PRESENT POSITION LEFT BY TFFCONIC
035455,000972: # M: (-27+NR)
035456,000973: # RTERM E: (-29) M: (-27) M TERMINAL RADIUS LENGTH LEFT BY CALCTFF
035457,000974: # NRTERM E: (-29+NR) M NORM LENGTH OF TERMINAL RADIUS LEFT BY CALCTFF
035458,000975: # M: (-27+NR)
035459,000976: # TFFVSQ E: (20) M: (18) 1/M -(V SQ/MU): PRESENT VELOCITY, NORM LEFT BY TFFCONIC
035460,000977: # TFFNP E: (-38+2NR) M LCP, SEMI-LATUS RECTUM, WEIGHT NR LEFT BY TFFCONIC
035461,000978: # M: (-36+2NR)
035462,000979:
035463,000980: # DEBRIS: QPRET, PDL+0 ... PDL+3
035464,000981: # RTERM, NRTERM IF PREVGAM ENTERED.
|
|
Page 814
|
035466,000983:
035467,000984: 26,3046 77657 PREVGAM SL* # ENTER WITH NEW RTERM IN MPAC
035468,000985: # E: (-29) M: (-27)
035469,000986: 26,3047 20201 0,1 # X1 = -NR
035470,000987: 26,3050 00021 STORE NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035471,000988:
035472,000989: 26,3051 41345 VGAMCALC DLOAD DMP
035473,000990: 26,3052 00041 NRMAG # RMAG M E: (-29+NR) M: (-27+NR)
035474,000991: 26,3053 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035475,000992: 26,3054 45325 PDDL DSU # RMAG RTERM M E: (-58+2NR) M: (-54+2NR)
035476,000993: 26,3055 00041 NRMAG # RMAG M E: (-29+NR) M: (-27+NR)
035477,000994: 26,3056 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035478,000995: 26,3057 56257 SL* DDV # 2(RN-RTERM) E: (-30+NR) M: (-28+NR)
035479,000996: 26,3060 20171 0 -8D,1 # (-8+NR)
035480,000997: # PUSH UP PRODUCT.
035481,000998: 26,3061 77625 DSU
035482,000999: 26,3062 00025 TFFVSQ # -(V SQ/MU) E: (20) M: (18)
035483,001000: 26,3063 41566 SQRT PUSH # SAVE VGAM/RT(MU) FOR NOW. E: (10) M: (9)
035484,001001: 26,3064 65271 DDV PDDL # XCH PDL+0, LEAVING VGAM FOR OUTPUT.
035485,001002: # VGAM TO PDL M/CS E: (-7) M: (-2)
035486,001003: 26,3065 00037 TFF/RTMU # E: (17) M: (14)
035487,001004: 26,3066 65205 DMP PDDL # RTERM VGAM/RTMU E: (-19+NR) M: (-18+NR)
035488,001005: 26,3067 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035489,001006: 26,3070 00035 TFFNP # LC P =H.H/MU M E: (-38+2NR) M: (-36+2NR)
035490,001007: 26,3071 56366 SQRT DDV # E: (-19+NR) M: (-18+NR)
035491,001008: # PUSH UP DEN E: (-19+NR) M: (-18+NR)
035492,001009: # USE DDV OVFL AS LIMITER (|COS| <1.0)
035493,001010: 26,3072 65542 SR1 ACOS
035494,001011: 26,3073 77616 DUMPVGAM RVQ
035495,001012: # CALLER MUST SUPPLY OWN SIGN ...
035496,001013: # 22W 27MS
035497,001014:
|
|
Page 815
|
035499,001016: # SUBROUTINE NAME: TFF/TRIG (USED BY S61.2) DATE 01.17.67
035500,001017: # MOD NO: 0 LOG SECTION: P61-P67
035501,001018: # MOD BY: RR BAIRNSFATHER
035502,001019: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 14 APR 67
035503,001020: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 68 ACCEPT DIFFERENT EARTH/MOON SCALE
035504,001021:
035505,001022: # FUNCTIONAL DESCRIPTION: USED BY ENTRY DISPLAY TO CALCULATE SIN(THETA), COS(THETA) FROM DATA LEFT IN
035506,001023: # PDL BY TFF SUBROUTINES. THE EQNS ARE
035507,001024:
035508,001025: # COS(THETA) = 1-2 ABS(ARG) / (RN RTERM (1+X) )
035509,001026: # 2
035510,001027: # SIN(THETA) = SGN(ARG) SQRT(1-COS (THETA) )
035511,001028:
035512,001029: # WHERE THETA = TRANSFER ANGLE
035513,001030: # AND ARG = P Z ABS(Z) IF ALFA ZZ LEQ 1
035514,001031: # ARG = (P / ALFA) SGN(Q1 + R 1/Z) IF ALFA Z Z G 1
035515,001032: # AND ARG HAS BEEN AFFIXED WITH THE SIGN OF SIN(THETA).
035516,001033:
035517,001034: # CALLING SEQUENCE: CALL
035518,001035: # TFF/TRIG
035519,001036: # PUSHLOC AT PDL+0, ARBITRARY IF NOT EQ 14D
035520,001037: # C(MPAC) UNSPECIFIED
035521,001038:
035522,001039: # SUBROUTINES CALLED: NONE
035523,001040:
035524,001041: # NORMAL EXIT MODES: RVQ
035525,001042:
035526,001043: # ALARMS: NONE
035527,001044:
035528,001045: # OUTPUT: C(MPAC) = .5 SIN(THETA)
035529,001046: # CDELF/2 = .5 COS(THETA) (IN PDL 14D)
035530,001047: # PUSHLOC AT PDL+0
035531,001048:
035532,001049: # ERASABLE INITIALIZATION REQUIRED:
035533,001050: # TFFX X LEFT BY CALCTFF OR CALCTPER
035534,001051: # TFFTEM E: (-59+2NR) ARG LEFT BY CALCTFF OR CALCTPER
035535,001052: # M: (-55+2NR) WHERE ARG = LCP ZZ SGN(DELF) OR ARG = LCP/ALFA SGN(DELF)
035536,001053: # NRTERM E: (-29+NR) M NORM LENGTH OF TERMINAL RADIUS LEFT BY CALCTFF OR CALCTPER
035537,001054: # M: (-27+NR)
035538,001055: # NRMAG E: (-29+NR) M NORM LENGTH OF PRESENT POSITION LEFT BY TFFCONIC
035539,001056: # M: (-27+NR)
035540,001057:
035541,001058: # DEBRIS: QPRET, CDELF/2
035542,001059:
035543,001060: 27,2631 BANK 27
035544,001061: 27,2000 SETLOC P60S5
035545,001062: 27,2000 BANK
035546,001063: 27,2631 70545 TFF/TRIG DLOAD SR1
035547,001064: 27,2632 00043 TFFX
035548,001065: 27,2633 41215 DAD DMP
035549,001066: 27,2634 15333 HIDPHALF
035550,001067: 27,2635 00041 NRMAG # RMAG M E: (-29+NR) M: (-27+NR)
035551,001068: 27,2636 55205 DMP BDDV
035552,001069: 27,2637 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035553,001070: 27,2640 00045 TFFTEM # P ZSQ OR P/ALFA E: (-59+2NR) M: (-55+2NR)
035554,001071: 27,2641 44246 ABS BDSU # THE SIGN IS FOR SDELF.
035555,001072: 27,2642 15333 HIDPHALF
035556,001073: 27,2643 00017 STORE CDELF/2 # .5 COS(THETA)
035557,001074: 27,2644 57516 DSQ DCOMP # KEEP HONEST FOR SQRT.
|
|
Page 816
|
035559,001076: 27,2645 75415 DAD SQRT
035560,001077: 27,2646 15325 HIDP1/4
035561,001078: 27,2647 43565 DUMPTRIG SIGN RVQ
035562,001079: 27,2650 00045 TFFTEM # AFFIX SIGN(DELE/2)
035563,001080: # RETURN WITH .5 SIN(THETA) IN MPAC
035564,001081:
035565,001082: # 16W 15MS
035566,001083:
035567,001084: 27,2651 77620 DISPTARG STQ # C(MPAC) = TRGO ESTIMATE
035568,001085: 27,2652 03373 60GENRET
035569,001086: 27,2653 45205 DMP DSU
035570,001087: 27,2654 15003 KTETA1
035571,001088: 27,2655 03733 TTE1
035572,001089: 27,2656 37606 STCALL DTEAROT
035573,001090: 27,2657 46225 EARROT2
035574,001091: 27,2660 77624 CALL
035575,001092: 27,2661 56664 VRCALC
035576,001093: 27,2662 77650 GOTO
035577,001094: 27,2663 03373 60GENRET
035578,001095: 27,2664 50375 VRCALC VLOAD DOT
035579,001096: 27,2665 03542 URH
035580,001097: 27,2666 03474 RT
035581,001098: 27,2667 65512 SL2 ACOS
035582,001099: 27,2670 77616 RVQ
035583,001100:
035584,001101: # END OF PROGRAM S61.2
035585,001102:
|
|
Page 817
|
035587,001104: # PROGRAM DESCRIPTION S62.3 DATE 10JAN67
035588,001105: # MOD NO 1 LOG SECTION P60-P67
035589,001106: # MOD BY ZELDIN
035590,001107: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 15 MAY 67 CHANGED TO REF COORDS.
035591,001108: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 ALFAPAD CHANGES MADE.
035592,001109:
035593,001110: # FUNCTIONAL DESCRIPTION
035594,001111:
035595,001112: # COMPUTE DESIRED GIMBOL ANGLES FOR ENTRY ATTITUDE
035596,001113: # THE FOLLOWING TRAJECTORY TRIAD IS AVAILABLE IN MEMORY AND IS COMPUTED EACH 2 SECONDS BY CM/POSE IN
035597,001114: # REFERENCE COORDINATES (V = VELOCITY RELATIVE TO EARTH) :
035598,001115:
035599,001116: # UXA = -UNIT(V)
035600,001117: # UYA = UNIT(V*R)
035601,001118: # UZA = UXA*UYA
035602,001119:
035603,001120: # GENERATE A DESIRED BODY TRIAD FOR TRIMMED FLIGHT WITH RESPECT TO THE RELATIVE VELOCITY VECTOR, USING
035604,001121: # ROLL COMMAND AND TRIM ANGLE OF ATTACK:
035605,001122:
035606,001123: # UXD = UNIT(UYD*UXA) SIN(ALFATRIM) + UXA COS(ALFATRIM)
035607,001124: # UYD = UYA COS(ROLLC) + UZA SIN(ROLLC)
035608,001125: # UZD = UXD * UYD
035609,001126:
035610,001127: # USE THE DESIRED SET (IN REFERENCE COORDS) AND REFSMMAT TO CALL CALCGA AND OBTAIN GIMBAL ANGLES
035611,001128: # IN 2S, C IN MPAC, +2 AND THETAD, +2.
035612,001129:
035613,001130: # CALLING SEQUENCE
035614,001131:
035615,001132: # L CALL
035616,001133: # L+1 S62.3
035617,001134:
035618,001135: # NORMAL EXIT MODE
035619,001136:
035620,001137: # RETURN VIA QPRET DIRECTLY FROM CALCGA.
035621,001138:
035622,001139: # SUBROUTINES CALLED
035623,001140:
035624,001141: # CALCGA
035625,001142:
035626,001143: # ALARM OR ABORT MODES
035627,001144:
035628,001145: # NONE
035629,001146:
035630,001147: # ERASABLE INITIALIZATION REQUIRED
035631,001148:
035632,001149: # ROLLC ROLL COMMAND DP 1:S COMP AT 1REV
035633,001150: # ALFAPAD SP 1S,C / 180 LEFT BY PAD LOAD ALFATRIM IS NEGATIVE.
035634,001151: # UXA/2 REF COORDS LEFT BY CM/POSE
035635,001152: # UYA/2 REF COORDS LEFT BY CM/POSE
035636,001153: # UZA/2 REF COORDS LEFT BY CM/POSE
035637,001154:
035638,001155: # OUTPUT
035639,001156: #
035640,001157: # CPHI GIMBAL ANGLES (O,I,M) 2:S COMP TP (O,I,M)/180
035641,001158:
035642,001159: # DEBRIS
035643,001160:
035644,001161: # QTEMP, QPRET, PUSHLIST
035645,001162:
035646,001163: 10,2376 BANK 10
035647,001164: 10,2000 SETLOC P60S4
035648,001165: 10,2000 BANK
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Page 818
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035650,001167: 10,2376 COUNT* $$/S62.3
035651,001168:
035652,001169: 10,2376 67201 S62.3 SETPD SLOAD
035653,001170: 10,2377 00001 0
035654,001171: 10,2400 03012 ALFAPAD # ALFATRIM / 180, ALFA IS NEG.
035655,001172: 10,2401 41542 SR1 PUSH
035656,001173: 10,2402 65346 COS PDDL # XCH PDL, COS TO PDL0
035657,001174: 10,2403 65356 SIN PDDL # SIN TO PDL2
035658,001175: 10,2404 03316 ROLLC
035659,001176: 10,2405 74346 COS VXSC
035660,001177: 10,2406 03550 UYA/2 # REF COORDS
035661,001178: 10,2407 73525 PDDL SIN # PUSH VECTOR INTO PDL4,.9
035662,001179: 10,2410 03316 ROLLC
035663,001180: 10,2411 53361 VXSC VAD
035664,001181: 10,2412 03556 UZA/2 # REF COORDS
035665,001182: # VECTOR FROM PDL4, 9
035666,001183: 10,2413 77772 VSL1
035667,001184: 10,2414 02722 STORE YNB # = UYD REF COORDS
035668,001185:
035669,001186: 10,2415 76435 VXV VSL1
035670,001187: 10,2416 03542 UXA/2 # REF COORDS
035671,001188: 10,2417 65361 VXSC PDDL
035672,001189: # SIN TRIM FROM PDL2
035673,001190: # XCH PDL0 FOR COS TRIM
035674,001191: 10,2420 53361 VXSC VAD
035675,001192: 10,2421 03542 UXA/2 # REF COORDS
035676,001193: # FROM PDL0
035677,001194: 10,2422 77772 VSL1
035678,001195: 10,2423 02714 STORE XNB # X SC AXIS (.5 UNIT) REF COORDS
035679,001196:
035680,001197: 10,2424 76435 VXV VSL1
035681,001198: 10,2425 02722 YNB
035682,001199: 10,2426 26730 STOVL ZNB # Z SC IN REF COOR. SCALED AT 2
035683,001200: 10,2427 01736 REFSMMAT
035684,001201: 10,2430 26672 STOVL XSM
035685,001202: 10,2431 01744 REFSMMAT +6
035686,001203: 10,2432 26700 STOVL YSM
035687,001204: 10,2433 01752 REFSMMAT +12D
035688,001205: 10,2434 02706 STORE ZSM
035689,001206:
035690,001207: 10,2435 52014 CLEAR GOTO
035691,001208: 10,2436 00260 CPHIFLAG # CAUSE CALCGA TO STORE ANS IN TP CPHI
035692,001209: 10,2437 47311 CALCGA
035693,001210: # CALCGA WILL RETURN TO ORIGINAL CALLER
035694,001211: # VIA QPRET WITH 2,S COMP. ANGLES IN CPHI
035695,001212:
035696,001213:
035697,001214:
End of include-file P61-P67.agc. Parent file is MAIN.agc