Source Code
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These source-code files are part of a reconstructed copy of Comanche 45, the
second release, though not the final mission release, of the Apollo 10
Command Module (CM) Apollo Guidance Computer (AGC) software. Comanche 45 was
preceded by Comanche 44 and followed by Comanche 45/2 (the flown release). The reconstruction
is believed to be exactly accurate, but in the absence of an actual Apollo-era
listing of Comanche 45, some explanation of the reconstruction process is needed
to insure confidence in that accuracy.
The starting point was the source code of Comanche 44 (itself previously accurately
reconstructed). Comanche 44 source code was then modified
by incorporating changes known from contemporary documentation to have been
made between revisions 44 and 45. The now-reconstructed Comanche 45 source code was
verified by assembling it and checking that the assembled code had
the expected known-correct memory-bank checksums.
Note that page numbers in the reconstructed code tend to match those in the Comanche 55, the
most-similar revision of Comanche for which we have access to an actual non-reconstructed hardcopy;
the source code would likely have different page numbers in a contemporary
Comanche 45 listing.
Annotations that were not present in the contemporary source code have been added to the reconstructed
code to justify each change relative to Comanche 44. Here's a guide to the Apollo documentation referenced
in those annotations:
There is also
a detailed commentary about the reconstruction process.
Comments expected to have been present in 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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034534,000002: ## Copyright: Public domain.
034535,000003: ## Filename: P61-P67.agc
034536,000004: ## Purpose: A section of Comanche revision 045.
034537,000005: ## It is part of the reconstructed source code for the
034538,000006: ## second release of the flight software for the Command
034539,000007: ## Module's (CM) Apollo Guidance Computer (AGC) for Apollo 10.
034540,000008: ## The code has been recreated from a copy of Comanche 055. It
034541,000009: ## has been adapted such that the resulting bugger words
034542,000010: ## exactly match those specified for Comanche 45 in NASA drawing
034543,000011: ## 2021153D, which gives relatively high confidence that the
034544,000012: ## reconstruction is correct.
034545,000013: ## Assembler: yaYUL
034546,000014: ## Contact: Ron Burkey <info@sandroid.org>.
034547,000015: ## Website: www.ibiblio.org/apollo/index.html
034548,000016: ## Mod history: 2020-12-06 MAS Created from Comanche 44.
034549,000017:
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Page 789
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034551,000019: # PROGRAM: P61
034552,000020: # MOD NO.: 0 MAR. 13, 1967
034553,000021: # MOD BY: R. HIRSCHKOP
034554,000022: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 22 JUN 67 RESTARTS.
034555,000023: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP CHANGES.
034556,000024: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 8 MAY 68 DELETE CMSM MANEUVER (PCR 50)
034557,000025: # FUNCTION: TO CALCULATE AND DISPLAY EMS INITIALIZATION DATA
034558,000026: # CALLING SEQUENCE- BY V37
034559,000027: # EXIT- TO P62
034560,000028: # SUBROUTINE CALLS- S61.1, S61.3, GOFLASH, FLAGUP, R02BOTH
034561,000029: # ERASABLE INITIALIZATION:
034562,000030: # EMSALT (-29) M .05G ALTITUDE ABOVE FISCHER ELLIPSOID PAD LOADED.
034563,000031: # ALFAPAD /180 HYPERSONIC CM TRIM ANGLE OF ATTACK PAD LOADED
034564,000032: # OUTPUT: THE FOLLOWING REGISTERS ARE WRITTEN IN FOR USE BY DISPLAYS
034565,000033: # GMAX 100 GMAX (-14) G,S MAXIMUM ACCELERATION
034566,000034: # VPRED (-7) M/CS PREDICTED VELOCITY AT 400K FT
034567,000035: # GAMMAEI GAMMA/360 PREDICTED GAMMA AT 400K FT
034568,000036: # RTGO THETAH/360 RANGE ANGLE TO SPLASH FROM EMSALT EMSALT IS PAD LOADED
034569,000037: # VIO (-7) M/CS INERTIAL VELOCITY AT EMSALT EMSALT IS PAD LOADED
034570,000038: # TTE (-28) CS TIME TO EMSALT EMSALT IS PAD LOADED
034571,000039: # LAT(SPL) /360 TARGET LOCATION LEFT BY DSKY
034572,000040: # LNG(SPL) /360 TARGET LOCATION LEFT BY DSKY
034573,000041: # HEADSUP (0) +1 = LIFT DOWN, -1 = LIFT UP LEFT BY DSKY
034574,000042: # DEBRIS: SEE SUBROUTINES.
034575,000043:
034576,000044: 26,2217 BANK 26
034577,000045: 26,2000 SETLOC P60S
034578,000046: 26,2000 BANK
034579,000047:
034580,000048: 26,2217 E6,1661 EBANK= AOG
034581,000049:
034582,000050: 26,2217 COUNT* $$/P61
034583,000051:
034584,000052: 26,2217 35002 P61 CA BIT14 # EXTENDED VERB SHOULD BE FREE THIS CLOSE
034585,000053: 26,2220 55044 TS EXTVBACT # TO V37
034586,000054: # LOCK OUT EXTENDED VERBS SO CAN USE TFF
034587,000055: # ROUTINES. EXT VERB ERASE IS USED
034588,000056:
034589,000057: 26,2221 45017 CS ONE # REMOVE IF HEADSUP EVER ON UPLINK DATA
034590,000058: 26,2222 55726 TS HEADSUP # PRELOAD
034591,000059:
034592,000060: 26,2223 02544 TC S61.1 # CHECK STATE VECTOR AND IMU ORIENTATION
034593,000061: # RV 60GENRET. DOES PHASCHNG, GROUP 4.
034594,000062:
034595,000063: 26,2224 32425 CA V06N61 # LAT(SPL) LNG(SPL) HEADSUP
034596,000064: # XXX.XX DEG XXX.XX DEG XXXXX.
034597,000065: 26,2225 04662 TC BANKCALL
034598,000066: 26,2226 21057 CADR GOFLASHR
034599,000067: 26,2227 04106 TC GOTOPOOH
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Page 790
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034601,000069: 26,2230 02235 TC P61.4
034602,000070: 26,2231 02224 TC -5
034603,000071:
034604,000072: 26,2232 05412 P61.3 TC PHASCHNG
034605,000073: 26,2233 00014 OCT 00014
034606,000074:
034607,000075: 26,2234 05217 TC ENDOFJOB
034608,000076:
034609,000077: 26,2235 22007 P61.4 ZL
034610,000078: 26,2236 11726 CCS HEADSUP # C(HEADSUP)= +1/-1
034611,000079: 26,2237 35002 CA BIT14 # IF HEADSUP POS,ROLLC =180 DEG.(LIFT DWN)
034612,000080: 26,2240 12241 NOOP # IF HEADSUP NEG,ROLLC =0 (LIFT UP)
034613,000081: 26,2241 53716 DXCH ROLLC # ROLLC IS USED BY S62.3: GIM ANG AT .05G
034614,000082:
034615,000083: 26,2242 06006 TC INTPRET
034616,000084: 26,2243 77745 NEWRNVN DLOAD
034617,000085: 26,2244 01205 PIPTIME # SAVE TIME OF RN,VN TO DETERMINE IF AN
034618,000086: 26,2245 37651 STCALL MM # UPDATE HAS OCCURRED
034619,000087: 26,2246 52063 STARTEN1 # INITIALIZE
034620,000088: 26,2247 77775 VLOAD
034621,000089: 26,2250 01171 RN
034622,000090: 26,2251 02327 STORE RONE
034623,000091: 26,2252 77656 UNIT
034624,000092: 26,2253 26343 STOVL URONE
034625,000093: 26,2254 01177 VN
034626,000094: 26,2255 02335 STORE VONE
034627,000095: 26,2256 53435 VXV UNIT
034628,000096: 26,2257 02343 URONE
034629,000097: 26,2260 03502 STORE UNI
034630,000098: 26,2261 45345 DUMPP61 DLOAD DSU
034631,000099: 26,2262 03651 MM # INITIAL VALUE OF PIPTIME
034632,000100: 26,2263 01205 PIPTIME
034633,000101: 26,2264 45040 BMN CALRB
034634,000102: 26,2265 54243 NEWRNVN # UPDATED... GO TRY AGAIN
034635,000103: 26,2266 54651 S61.2 # GET DISPLAY DATA FOR N60 AND N63
034636,000104: # AND RETURN IN BASIC, BELOW.
034637,000105: 26,2267 05536 P61.1 TC CLEARMRK
034638,000106: 26,2270 32424 CA V06N60 # GMAX VPRED GAMMAEI
034639,000107: # XXX.XX G XXXXX. FPS XXX.XX DEG
034640,000108: 26,2271 04662 TC BANKCALL
034641,000109: 26,2272 20720 CADR GOFLASH
034642,000110:
034643,000111: 26,2273 04106 TC GOTOPOOH
034644,000112: 26,2274 02276 TC P61.2 # PROCEED
034645,000113: 26,2275 02270 TC -5
034646,000114:
034647,000115: 26,2276 06006 P61.2 TC INTPRET # CORRECT TTE FOR TIME LAPSE DURING
034648,000116: # ABOVE DISPLAY.
034649,000117: 26,2277 45234 RTB DSU
034650,000118: 26,2300 45510 LOADTIME # CURRENT TIME.
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Page 791
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034652,000120: 26,2301 03651 MM # PIPTIME FOR RONE & VONE.
034653,000121: 26,2302 77615 DAD
034654,000122: 26,2303 03733 TTE1 # NEGATIVE OF FREE FALL TIME.
034655,000123: 26,2304 03727 STORE TTE # DECREMENTED
034656,000124:
034657,000125: 26,2305 77776 EXIT
034658,000126:
034659,000127: 26,2306 32426 CA V06N63 # RTGO VIO TTE
034660,000128: # XXXX.X NM XXXXX. FPS XXBXX M,S
034661,000129: 26,2307 04662 TC BANKCALL
034662,000130: 26,2310 20720 CADR GOFLASH
034663,000131: 26,2311 04106 TC GOTOPOOH
034664,000132: 26,2312 02314 TC +2
034665,000133: 26,2313 02276 TC P61.2 # REDO
034666,000134:
034667,000135: # .... THEN FALL INTO P62
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Page 792
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034669,000137:
034670,000138: # PROGRAM- P62
034671,000139: # MOD NO.- 0 MAR. 13, 1967
034672,000140: # MOD BY- R. HIRSCHKOP
034673,000141: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 67
034674,000142: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 22 JUN 67 RESTARTS.
034675,000143: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP CHANGES.
034676,000144: # MOD NO: 4 MOD BY: RR BAIRNSFATHER DATE: 8 MAY 68 MOVE START OF DESIRED GIMBAL CALC.
034677,000145: # FUNCTION- 1) TO NOTIFY CREW WHEN GNC SYSTEM IS PREPARED FOR CM/SM SEPARATION
034678,000146: # 2) TO ORIENT THE CM TO THE CORRECT ATTITUDE FOR ATMOSPHERIC ENTRY
034679,000147: # CALLING SEQUENCE- BY V37 OR DIRECTLY FROM P61
034680,000148: # EXIT- TO P63
034681,000149: # ERASABLE INITIALIZATION:
034682,000150: # ALFAPAD LEFT BY PAD LOAD
034683,000151: # LADPAD LEFT BY PAD LOAD
034684,000152: # LODPAD LEFT BY PAD LOAD
034685,000153: # LAT(SPL) (MAY BE CHANGED BELOW) LEFT BY DSKY, VIA P61
034686,000154: # LNG(SPL) (MAY BE CHANGED BELOW) LEFT BY DSKY, VIA P61
034687,000155: # HEADSUP (MAY BE CHANGED BELOW) LEFT BY DSKY, VIA P61
034688,000156: # SUBROUTINE CALLS: NEWMODEX, S61.1, CM/DAPIC, CM/DAPON, R02BOTH, GOPERF1, GOFLASH, GODSPR
034689,000157:
034690,000158: 26,2314 COUNT* $$/P62
034691,000159:
034692,000160: 26,2314 05354 TC NEWMODEX # MODE CHANGE IF CAME FROM P61.
034693,000161: 26,2315 00076 MM 62 B-14 # MODE CHANGE AUTOMATIC VIA V 37.
034694,000162: 26,2316 35017 CA ONE
034695,000163: 26,2317 54332 TS DNLSTCOD
034696,000164:
034697,000165: 26,2320 02544 P62 TC S61.1 # CHECK STATE VECTOR AND IMU ORIENTATION.
034698,000166:
034699,000167: 26,2321 06006 TC INTPRET
034700,000168: 26,2322 47131 SSP RTB
034701,000169: 26,2323 03325 POSEXIT
034702,000170: 26,2324 54401 P62.3 # CALCULATE DESIRED .05G GIMBAL ANGLES,
034703,000171: # WITHOUT DISPLAY.
034704,000172: 26,2325 41672 CM/DAPIC # START CM/POSE AND BODY RATE CALC
034705,000173:
034706,000174: # DOES 2PHSCHNG, OCT 40116, OCT 05024, OCT 13000.
034707,000175: # CM/DAPIC SETS EBANK = EBAOG
034708,000176: # AND RETURNS IN BASIC TO P62.2.
034709,000177: 26,2326 00006 P62.2 EXTEND
034710,000178: 26,2327 32432 DCA POSECADR # CONTINUE WITH CM/POSE AFTER AV G.
034711,000179: 26,2330 53223 DXCH AVEGEXIT
034712,000180:
034713,000181: 26,2331 34270 CAF OCT41 # REQUEST SEPARATION
034714,000182: 26,2332 04662 TC BANKCALL
034715,000183: 26,2333 21125 CADR GOPERF1R
034716,000184: 26,2334 04106 TC GOTOPOOH
034717,000185: 26,2335 02340 TC +3 # PROCEED
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Page 793
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034719,000187: # NOTE: NODOFLAG WILL BE SET IN CM/DAPON. <<<
034720,000188: 26,2336 02331 TC -5 # ENTER
034721,000189: 26,2337 02232 TC P61.3 # FOR PHASCHNG AND ENDOFJOB.
034722,000190:
034723,000191: 26,2340 04701 +3 TC POSTJUMP
034724,000192: 26,2341 41612 CADR CM/DAPON # DISABLE RCS DAP, ENABLE ENTRY DAP AND
034725,000193: # DO ATTITUDE HOLD.
034726,000194:
034727,000195: # WILL IDLE UNTIL CM/POSE DOES ONE UPDATE.
034728,000196: # CM/DAPON DOES NO PHASCHNG.
034729,000197:
034730,000198: 26,2342 32425 P62.1 CA V06N61 # LAT(SPL) LNG(SPL) HEADSUP
034731,000199: # XXX.XX DEG XXX.XX DEG 0000X.
034732,000200:
034733,000201: # TERMINATE ATTITUDE HOLD. SET UP COMMANDS:
034734,000202: # ROLLC, ALFACOM, BETACOM. BEGIN MANUVER TO
034735,000203: # ENTRY ATTITUDE.
034736,000204:
034737,000205: 26,2343 04662 TC BANKCALL
034738,000206: 26,2344 20720 CADR GOFLASH
034739,000207: 26,2345 02342 TC -3
034740,000208: 26,2346 02350 TC +2
034741,000209: 26,2347 02342 TC -5
034742,000210:
034743,000211: 26,2350 05412 TC PHASCHNG
034744,000212: 26,2351 04024 OCT 04024 # USE ENTRYVN FOR DISPLAY BELOW.
034745,000213: # EBANK WAS SET IN CM/DAPON TO EBAOG
034746,000214:
034747,000215: 26,2352 11726 CCS HEADSUP # C(HEADSUP) = +/- 1
034748,000216: 26,2353 35002 CA BIT14 # IF HEADSUP POS, ROLLC=180 DEG (LIFT DWN)
034749,000217: 26,2354 12355 NOOP # IF HEADSUP NEG, ROLLC=0 DEG (LIFT UP)
034750,000218: 26,2355 55715 TS ROLLC
034751,000219: 26,2356 31411 CA ALFAPAD # NOMINAL ALFATRIM PAD LOADED, NEG. NO.
034752,000220: 26,2357 22007 ZL
034753,000221: 26,2360 53604 DXCH ALFACOM # SET ALFACOM = ALFA TRIM, BETACOM=0
034754,000222:
034755,000223: 26,2361 35017 CA ONE # PERMITS EXDAP2 TO CHANGE FLAG TO +0
034756,000224: 26,2362 55727 TS P63FLAG # AS INDICATOR. STARTS UP P63.
034757,000225:
034758,000226: 26,2363 35052 CA V06N22 # SET UP DISPLAY FOR CDU DESIRED VALUES
034759,000227: 26,2364 55263 TS ENTRYVN # FROM ENTRY ATTITUDE CALC, THAT IS
034760,000228: # ALREADY GOING.
034761,000229: 26,2365 05546 TC UPFLAG # TURN ON ENTRY DISPLAY
034762,000230: 26,2366 00134 ADRES ENTRYDSP # ENTRYDSP = 92D BIT 13 FLAG 6
034763,000231: # SKIP
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Page 794
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034765,000233: 26,2367 41700 CS CMDAPMOD # GO DIRECTLY TO P63 IF BODY ATTITUDE
034766,000234: 26,2370 75017 MASK ONE # IS SUCH THAT THE DELAY TASK: WAKEP62
034767,000235: 26,2371 00006 EXTEND # WILL BE OMITTED.
034768,000236: 26,2372 12421 BZF P63.1 # DISABLE GRP 4, GO TO ENDOFJOB.
034769,000237: # (IE, CONTINUE IF CMDAPMOD = -1, OR +0)
034770,000238: 26,2373 02405 TC P63
034771,000239:
034772,000240: # PUT JOB TO SLEEP UNTIL VEHICLE MANUVER HAS
034773,000241: # REDUCED ALFA TO +/-45 DEG. CONSIDER REMAINING
034774,000242: # 65 DEG (25 DEG IF ALFA NEG) TO ALFA TRIM TO
034775,000243: # OCCUR AT 3 DEG/SEC, AND TERMINATE P62 AT THAT
034776,000244: # TIME.
034777,000245:
034778,000246: # TASK WAKEP62 IS CALLED FROM ENTRY DAP.
034779,000247: 26,2374 35065 WAKEP62 CA PRIO13
034780,000248: 26,2375 05134 TC NOVAC
034781,000249: 26,2376 E6,1661 EBANK= AOG
034782,000250: 26,2376 02405 54066 2CADR P63
034783,000251:
034784,000252: 26,2400 05324 TC TASKOVER
034785,000253:
034786,000254: # EACH 2 SEC, CALCULATE GIMBAL ANGLES FOR ENTRY CON-
034787,000255: # DITIONS THAT WILL HOLD IF REORIENTATION WERE MADE
034788,000256: # AT PRESENT RN, VN. COME HERE FROM CM/POSE AND ALSO
034789,000257: # IN KEPLER PHASE OF ENTRY.
034790,000258:
034791,000259: 26,2401 52131 P62.3 SSP GOTO # SET RETURN ADDRESS SO THAT ROUTINE
034792,000260: 26,2402 00053 QPRET # GOES DIRECTLY TO ENTRY GUIDANCE EXIT
034793,000261: 26,2403 53576 ENDEXIT # THAT DOES ENTRY DISPLAY, GRP 5.
034794,000262: 26,2404 20376 S62.3 # PUT DESIRED CDU VALUES IN CPHI'S FOR
034795,000263: # N22 DISPLAY.
034796,000264:
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Page 795
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034798,000266: # P63
034799,000267: # PROGRAM- P63
034800,000268: # MOD NO.- 0 MAR. 13, 1967
034801,000269: # MOD BY- R. HIRSCHKOP
034802,000270: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 22 JIN 67 RESTARTS.
034803,000271: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 14 JUL 67 REVISED RESTARTS
034804,000272: # FUNCTION- 1) TO INITIALIZE THE ENTRY EQUATIONS
034805,000273: # 2) TO CONTINUE TO HOLD THE CM TO THE CORRECT ATTITUDE WITH RESPECT TO THE ATMOSPHERE FOR
034806,000274: # THE ONSET OF ENTRY DECELERATION. ROLL ANGLE IS LIFT UP/DOWN AS SPECIFIED BY HEADSUP.
034807,000275: # 3) TO SENSE .05 G
034808,000276: # CALLING SEQUENCE- DIRECTLY FROM P62
034809,000277: # EXIT- TO ENDOFJOB
034810,000278: # SUBROUTINE CALLS- NEWMODEX, GODSPR
034811,000279:
034812,000280: 26,2405 COUNT* $$/P63
034813,000281:
034814,000282: 26,2405 05354 P63 TC NEWMODEX
034815,000283: 26,2406 00077 MM 63 B-14
034816,000284:
034817,000285: # ARRIVE WITH EBANK = AOG.
034818,000286:
034819,000287: 26,2407 32430 CA ENTCADR # CONTINUE AT STARTENT AFTER CM/POSE.
034820,000288:
034821,000289: # AT END OF STARTENT, CHANGE ADDRESS IN GOTOADDR
034822,000290: # TO CONTINUE AT SCALEPOP THEREAFTER.
034823,000291:
034824,000292: 26,2410 55724 TS POSEXIT
034825,000293:
034826,000294: 26,2411 32427 CA V06N64 # G VI R TO SPLSH
034827,000295: # XXX.XX G XXXXX. FPS XXXX.X NM
034828,000296: 26,2412 55263 TS ENTRYVN # FOR DISPLAY CALL IN OVERNOUT.
034829,000297:
034830,000298: 26,2413 45017 CS ONE # IN CASE FLAG IS LEFT AT +1 BY DAP. THE
034831,000299: 26,2414 55727 TS P63FLAG # -1 ASSURES THAT EXO-ATM DAP WILL NOT
034832,000300: # CALL P63 OUT OF SEQUENCE IN P66.
034833,000301:
034834,000302: 26,2415 05412 TC PHASCHNG # THIS IS REQUIRED TO PRESERVE CLEANDSP
034835,000303: 26,2416 00004 OCT 00004 # RETURN IN EVENT OF AN EXTENDED VERB..
034836,000304:
034837,000305: 26,2417 04662 TC BANKCALL # FLUSH 'N22' DISPLAY, IF ON. (OMIT
034838,000306: 26,2420 20703 CADR CLEANDSP # DISPLAY DURING 'STARTENT' PASS.)
034839,000307:
034840,000308: 26,2421 05412 P63.1 TC PHASCHNG
034841,000309: 26,2422 00004 OCT 00004 # DISABLE. DISPLAY RESTARTED VIA ENTRY.
034842,000310:
034843,000311: 26,2423 05217 TC ENDOFJOB
034844,000312:
034845,000313: 26,2424 01474 V06N60 VN 0660
034846,000314: 26,2425 01475 V06N61 VN 0661
034847,000315: 26,2426 01477 V06N63 VN 0663
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Page 796
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034849,000317: 26,2427 01500 V06N64 VN 0664
034850,000318: 26,2430 52000 ENTCADR CADR STARTENT
034851,000319:
034852,000320: 26,2431 E7,1451 EBANK= RTINIT # TO CARY OVER INTO ENTRY STEERING.
034853,000321: 26,2431 03467 76067 POSECADR 2CADR CM/POSE
034854,000322:
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Page 797
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034856,000324: # PROGRAM- P64
034857,000325: # MOD NO.- 1 SEPT. 19, 1967
034858,000326: # MOD BY- R. HIRSCHKOP
034859,000327: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 8 MAY 68 REVISED COMMENTS FOR COLOSSUS
034860,000328: # FUNCTION- 1. TO START ENTRY GUIDANCE AT .05G SELECTING ROLL ATTITUDE, CONSTANT DRAG LEVEL, AND
034861,000329: # DRAG THRESHOLD, KA, WHICH ARE KEYED TO THE .05G POINT.
034862,000330: # 2. SELECT FINAL PHASE P67 IF V < 27000 FPS WHEN .2G OCCURS.
034863,000331: # 3. ITERATE FOR UP-CONTROL SOLUTION P65 IF V > 27000 FPS AND IF ALTITUDE RATE AND DRAG
034864,000332: # LEVEL CONDITIONS ARE SATISFIED. ENTER P65 WHEN CONSTANT DRAG CONTROLLER HAS BROUGHT RANGE
034865,000333: # AS PREDICTED TO WITHIN 25 NM OF DESIRED RANGE.
034866,000334: # 4. SELECT FINAL PHASE P67 IF NO UP-CONTROL SOLUTION EXISTS WITH VL > 18000 FPS.
034867,000335: # CALLING SEQUENCE- BY RTB FROM REENTRY CONTROL
034868,000336: # EXIT- BACK TO REENTRY CONTROL
034869,000337: # SUBROUTINE CALLS- NEWMODEX
034870,000338:
034871,000339: 25,2000 BANK 25
034872,000340: 26,2000 SETLOC P60S1
034873,000341: 26,2000 BANK
034874,000342:
034875,000343: # THIS DISPLAY IS CALLED EACH PASS THROUGH STEERING. RESTART PROTECTION IS VIA STEERING.
034876,000344:
034877,000345: 26,2433 COUNT* $$/P64
034878,000346:
034879,000347: 26,2433 05354 P64 TC NEWMODEX # ENTER VIA RTB WHEN .05G IS EXCEEDED.
034880,000348: 26,2434 00100 MM 64 B-14
034881,000349: 26,2435 32440 CA V06N68 # ROLLC VI HDOT
034882,000350: # XXX.XX DEG XXXXX. FPS XXXXX. FPS
034883,000351: 26,2436 55263 TS ENTRYVN # DISPLAY VIA OVERNOUT.
034884,000352:
034885,000353: 26,2437 06030 TC DANZIG # ... AND CONTINUE IN INITROLL ...
034886,000354: 26,2440 01504 V06N68 VN 0668
034887,000355:
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Page 798
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034889,000357: # PROGRAM: P65
034890,000358: # MOD NO: 0 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP ADDITION.
034891,000359: # FUNCTION: TO CONTINUE ENTRY GUIDANCE, USING THE UP-CONTROL PHASE TO STEER TO A CONTROLLED EXIT
034892,000360: # CONDITION. THIS PHASE TERMINATES A) IF D < Q7 FPSS, GO TO P66 ,
034893,000361: # B) IF RDOT NEG, AND IF V < VL +500 FPS, GO TO P67.
034894,000362: # CALLING SEQUENCE: BY RTB FROM REENTRY CONTROL
034895,000363: # EXIT: BACK TO REENTRY CONTROL, OR TO ENDOFJOB.
034896,000364: # SUBROUTINE CALLS: NEWMODEX
034897,000365:
034898,000366: 26,2441 COUNT* $$/P65
034899,000367:
034900,000368: 26,2441 05354 P65 TC NEWMODEX # ENTER VIA RTB WHEN RANGE < 25 N M OF
034901,000369: 26,2442 00101 MM 65 B-14 # TARGET.
034902,000370:
034903,000371: 26,2443 35065 CA PRIO13
034904,000372: 26,2444 05134 TC NOVAC
034905,000373: 26,2445 1263 EBANK= ENTRYVN
034906,000374: 26,2445 02457 54062 2CADR P65.1
034907,000375:
034908,000376: 26,2447 05372 TC 2PHSCHNG # 2 PHASE CHG REQUIRED TO PREVENT RE-
034909,000377: 26,2450 00554 OCT 00554 # STARTING FLASHING DISPLAY TWICE.
034910,000378: 26,2451 10035 OCT 10035 # 4.55 SPOT AND SERVICER, HERE.
034911,000379: 26,2452 06006 TC INTPRET
034912,000380: 26,2453 47131 SSP RTB
034913,000381: 26,2454 03646 GOTOADDR # CHANGE ENTRY MODE TO UPCONTRL.
034914,000382: 26,2455 53035 UPCONTRL
034915,000383: 26,2456 52120 REFAZE10 # GO HERE TO REESTABLISH ENTRY SEQUENCER.
034916,000384: # AND CONTINUE AT UPCONTRL...
034917,000385:
034918,000386: 26,2457 05560 P65.1 TC DOWNFLAG
034919,000387: 26,2460 00134 ADRES ENTRYDSP # ENTRYDSP = 92D BIT 13 FLAG 6
034920,000388:
034921,000389: 26,2461 32473 CA V16N69 # ROLLC DL (Q7) VL
034922,000390: 26,2462 04662 TC BANKCALL # XXX.XX DEG XXX.XX G XXXXX. FPS
034923,000391: 26,2463 21057 CADR GOFLASHR
034924,000392: 26,2464 02461 TC -3 # NODOFLAG IS SET..
034925,000393: 26,2465 02470 TC +3
034926,000394: 26,2466 02461 TC -5
034927,000395: 26,2467 02232 TC P61.3 # EST. GRP 4 FOR DSPLAY AND DO ENDOFJOB
034928,000396: # IF PROCEED, CONTINUE.
034929,000397: 26,2470 05546 TC UPFLAG
034930,000398: 26,2471 00134 ADRES ENTRYDSP # ENTRYDSP = 92D BIT 13 FLAG 6
034931,000399:
034932,000400: 26,2472 02421 TC P63.1 # DISABLE GRP 4,START UP ENTRY DISPLAY
034933,000401: # N06V68 VIA OVERNOUT, AS USED IN P64.
034934,000402: 26,2473 04105 V16N69 VN 1669
034935,000403:
|
|
Page 799
|
034937,000405: # PROGRAM: P66
034938,000406: # MOD NO: 0 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP ADDITIONS.
034939,000407: # FUNCTION: KEEP CM ATTITUDE IN TRIM TO THE RELATIVE VELOCITY VECTOR. ENTRY GUIDANCE STOPS GENERATING
034940,000408: # ROLL COMMANDS UNTIL DRAG BUILDS UP TO Q7+0.5 FPSS.
034941,000409: # CALLING SEQUENCE: VIA RTB FROM REENTRY CONTROL.
034942,000410: # EXIT: BACK TO REENTRY CONTROL.
034943,000411: # SUBROUTINE CALLS: NEWMODEX
034944,000412:
034945,000413: 26,2474 COUNT* $$/P66
034946,000414:
034947,000415: 26,2474 05354 P66 TC NEWMODEX # ENTER VIA RTB WHEN D < Q7 FPSS
034948,000416: 26,2475 00102 MM 66 B-14
034949,000417:
034950,000418: 26,2476 35052 CA V06N22 # OGA IGA MGA
034951,000419: # XXX.XX DEG XXX.XX DEG XXX.XX DEG
034952,000420: 26,2477 02503 TC P66END # IN CASE CAME FROM P65, GO DISABLE GRP4,
034953,000421: # AND SET ENTRYDSP TO DO DISPLAY VIA
034954,000422: # OVERNOUT.
034955,000423:
034956,000424: # ... AND CONTINUE AT KEP2
034957,000425:
|
|
Page 800
|
034959,000427: # P67
034960,000428:
034961,000429: # PROGRAM- P67
034962,000430: # MOD NO.- 0 MAR. 16, 1967
034963,000431: # MOD BY- R. HIRSCHKOP
034964,000432: # FUNCTION- TO TERMINATE STEERING WHEN THE CM VELOCITY WRT EARTH = 1000 FT/SEC
034965,000433: # CALLING SEQUENCE-
034966,000434: # EXIT- TO POOH
034967,000435: # SUBROUTINE CALLS- GOFLASH
034968,000436:
034969,000437: # THIS DISPLAY IS CALLED EACH PASS THROUGH STEERING. RESTART PROTECTION IS VIA STEERING.
034970,000438:
034971,000439: 26,2500 COUNT* $$/P67
034972,000440:
034973,000441: 26,2500 05354 P67 TC NEWMODEX # ENTER VIA RTB
034974,000442: 26,2501 00103 MM 67 B-14
034975,000443: 26,2502 32511 CA V06N66 # ROLLC XRNGERR DNRNGERR
034976,000444: # XXX.XX DEG XXXX.X NM XXXX.X NM
034977,000445: 26,2503 55263 P66END TS ENTRYVN # DISPLAY VIA OVERNOUT.
034978,000446:
034979,000447: 26,2504 05546 TC UPFLAG # (IN CASE CAME FROM P65. ENTRY DISPLAY
034980,000448: 26,2505 00134 ADRES ENTRYDSP # WILL FLUSH FLASHING DISP. IF STILL ON)
034981,000449: # BIT 13 FLAG 6
034982,000450: 26,2506 05412 KILLGRP4 TC PHASCHNG # DISABLE GRP4, IN CASE CAME FROM HUNTEST.
034983,000451: 26,2507 00004 OCT 00004 # (COME TO KILLGRP4 VIA RTB, RET TO CALLER)
034984,000452:
034985,000453: 26,2510 06030 TC DANZIG # ... AND CONTINUE AT PREDICT3 ...
034986,000454:
034987,000455: 26,2511 01502 V06N66 VN 0666
034988,000456:
034989,000457: 26,2512 BANK 26
034990,000458: 26,2000 SETLOC P60S2
034991,000459: 26,2000 BANK
034992,000460:
034993,000461: 26,2512 32543 P67.1 CA V16N67 # RTOGO LAT LONG
034994,000462: # XXXX.X NM XXX.XX DEG XXX.XX DEG
034995,000463: 26,2513 04662 TC BANKCALL
034996,000464: 26,2514 20720 CADR GOFLASH
034997,000465: 26,2515 02520 TC +3 # EFFECTIVE GOTOPOOH
034998,000466: 26,2516 02520 TC +2
034999,000467: 26,2517 02512 TC P67.1 # REDO
035000,000468:
035001,000469: 26,2520 46214 CS THREE # TURN OFF ENTRY DAP
035002,000470: 26,2521 00004 INHINT
035003,000471: 26,2522 70102 MASK CM/FLAGS # CM/DSTBY, GAMDIFSW
035004,000472: 26,2523 54102 TS CM/FLAGS
035005,000473: 26,2524 00003 RELINT
035006,000474: 26,2525 00006 EXTEND
035007,000475: 26,2526 32643 DCA SERVCAD2
035008,000476:
|
|
Page 801
|
035010,000478: 26,2527 53223 DXCH AVEGEXIT
035011,000479:
035012,000480: 26,2530 14106 TCF GOTOPOOH
035013,000481:
|
|
Page 802
|
035015,000483: 26,2531 43175 P67.2 VLOAD CLEAR # CALC PRESENT LAT, LONG, ALT.
035016,000484: 26,2532 01171 RN
035017,000485: 26,2533 00662 ERADFLAG # USE PAD RAD FOR ALT. (NOT SEEN ANYWAY)
035018,000486: 26,2534 16152 STODL ALPHAV
035019,000487: 26,2535 01205 PIPTIME # USE TIME OF RN
035020,000488: 26,2536 45014 CLEAR CALL
035021,000489: 26,2537 01663 LUNAFLAG
035022,000490: 26,2540 26370 LAT-LONG
035023,000491: 26,2541 77634 P67.3 RTB # ENTRY EXIT THAT OMITS DISPLAY.
035024,000492: 26,2542 53611 SERVNOUT
035025,000493:
035026,000494: 26,2543 04103 V16N67 VN 1667
035027,000495: 26,2544 4270 OCT41 = 33DEC
035028,000496: 26,2544 26,2642 SERVCAD2 = SERVCAD1
035029,000497:
|
|
Page 803
|
035031,000499: # SUBROUTINE NAME: S61.1
035032,000500: # MOD NO: 0 DATE: 21 FEB 67
035033,000501: # MOD BY: RR BAIRNSFATHER LOG SECTION: P61-P67
035034,000502: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 22 JUN 67 RESTARTS.
035035,000503:
035036,000504: # FUNCTIONAL DESCRIPTION: CALLED BY BOTH P61 AND P62
035037,000505: # FIRST, TEST TO SEE IF AVERAGEG IS ON. IF NOT, UPDATE THE STATE VECTOR TO PRESENT TIME + TOLERANCE
035038,000506: # AND TURN ON AVERAGEG AT THAT TIME, AND CONTINUE. OTHERWISE CONTINUE: SEE IF IMU Y AXIS IS
035039,000507: # WITHIN 30 DEG OF V*R. IF YES, EXIT SUBROUTINE S61.1. IF NO, SEE IF -Y AXIS OF IMU IS WITHIN
035040,000508: # 30 DEG OF V*R. IF YES, DISPLAY ALARM: 01427 IMU REVERSED.
035041,000509: # IF NO, DISPLAY ALARM: 01426 IMU UNSATISFACTORY.
035042,000510: # IN EITHER OF THESE LAST 2 CASES, WAIT 10 SEC AND THEN EXIT SUBROUTINE S61.1.
035043,000511:
035044,000512: # REMARK: THERE WILL BE A SHORT 10 SEC DELAY IF AN ALARM EXIT IS TAKEN. THE DELAY FOR INTEGRATION IS
035045,000513: # AS SHORT AS CAN BE MADE, BUT IS ARBITRARY SINCE IT DEPENDS ON THE AGE OF THE STATE VECTOR.
035046,000514:
035047,000515: # CALLING SEQUENCE: CALL
035048,000516: # S61.1
035049,000517:
035050,000518: # C(MPAC) UNSPECIFIED
035051,000519: # PUSHLOC UNSPECIFIED
035052,000520:
035053,000521: # SUBROUTINES CALLED: LOADTIME, CSMPREC, TPAGREE,
035054,000522: # WAITLIST, JOBSLEEP, JOBWAKE, PREREAD, ALARM, GODSPR, BANKCALL, DELAYJOB
035055,000523:
035056,000524: # NORMAL EXIT MODES: RVQ
035057,000525:
035058,000526: # ALARMS: 01426 IMU UNSATISFACTORY
035059,000527: # 01427 IMU REVERSED
035060,000528:
035061,000529: # OUTPUT: POSSIBLE ALARMS
035062,000530: # POSSIBLY TDEC1, RATT, VATT, RN, VN
035063,000531:
035064,000532: # ERASABLE INITIALIZATION REQUIRED:
035065,000533: # AVEGFLAG AVERAGEG ON OR OFF LEFT BY SERVICER
035066,000534: # PIPTIME (-28) CS TIME OF PIPA UPDATE LEFT BY READACCS
035067,000535: # RN (-29) M STATE VECTOR LEFT BY AVERAGEG
035068,000536: # VN (-7) M/CS STATE VECTOR LEFT BY AVERAGEG
035069,000537: # REFSMMAT (-1) .5 REF TO SM MATRIX LEFT BY LAST IMU ALIGNMENT
035070,000538:
035071,000539: # DEBRIS: QPRET
035072,000540: # POSSIBLY PIPTIME1, RATT, VATT, TDEC1, RN1, VN1, QTEMP, X1 IF UPDATED
035073,000541: # PUSH LIST LOCS USED BY CSMPREC
035074,000542:
035075,000543: 26,2544 E6,1661 EBANK= AOG # FOR 60GENRET, S61DT
035076,000544: 26,2544 BANK 26
035077,000545: 26,2000 SETLOC P60S3
035078,000546: 26,2000 BANK
035079,000547:
035080,000548: 26,2544 COUNT* $$/S61.1
035081,000549:
035082,000550: 26,2544 00006 S61.1 EXTEND
035083,000551: 26,2545 23773 QXCH 60GENRET # SAVE RET ADDR IN EB 6
035084,000552: 26,2546 04662 TC BANKCALL
035085,000553: 26,2547 17653 CADR R02BOTH
035086,000554: 26,2550 06006 TC INTPRET
|
|
Page 804
|
035088,000556: 26,2551 45014 BON CALRB
035089,000557: 26,2552 00716 AVEGFLAG # IS AVERAGEG ON
035090,000558: 26,2553 54604 S61.1A # YES
035091,000559: 26,2554 27543 MIDTOAV2 # GET FUTURE STATE VECTOR SOON AS CAN
035092,000560:
035093,000561: 26,2555 30155 CA MPAC +1 # RETURN INHINTED ***
035094,000562: 26,2556 55774 TS S61DT # FOR RESTART.
035095,000563: 26,2557 05245 TC WAITLIST
035096,000564: 26,2560 E7,1431 EBANK= DVCNTR
035097,000565: 26,2560 02565 54067 2CADR S61.1C
035098,000566:
035099,000567: 26,2562 05412 TC PHASCHNG
035100,000568: 26,2563 40434 OCT 40434
035101,000569: 26,2564 05217 TC ENDOFJOB
035102,000570:
035103,000571: 26,2565 35065 S61.1C CA PRIO13
035104,000572: 26,2566 05147 TC FINDVAC
035105,000573: 26,2567 E6,1661 EBANK= AOG
035106,000574: 26,2567 02603 54066 2CADR S61.1A -1
035107,000575:
035108,000576: 26,2571 00006 EXTEND
035109,000577: 26,2572 32643 DCA SERVCAD1 # HE WHO STARTS AVERAGEG MUST SERVICE
035110,000578: 26,2573 53223 DXCH AVEGEXIT # THE EXIT.
035111,000579:
035112,000580: 26,2574 05372 TC 2PHSCHNG
035113,000581: 26,2575 00454 OCT 00454
035114,000582: 26,2576 00415 OCT 00415
035115,000583:
035116,000584: 26,2577 35060 CA EBENTRY # SET EB= 7 FOR PREREAD.
035117,000585: 26,2600 54003 TS EBANK
035118,000586:
035119,000587: 26,2601 04701 TC POSTJUMP
035120,000588: 26,2602 76700 CADR PREREAD # PREREAD DOES TC TASKOVER.
035121,000589:
035122,000590: 26,2603 06006 TC INTPRET
035123,000591: 26,2604 77204 S61.1A BOVB VLOAD
035124,000592: 26,2605 57352 TCDANZIG # TURN OFF OVFIND, IF ON
035125,000593: 26,2606 01177 VN # VN (-7) M/CS
035126,000594: 26,2607 64235 VXV MXV
035127,000595: 26,2610 01171 RN # RN (-29) M
035128,000596: 26,2611 01736 REFSMMAT # .5 UNIT MATRIX
035129,000597: 26,2612 71256 UNIT DLOAD
035130,000598: 26,2613 00160 MPAC +3 # GET COS(THETA)/2
035131,000599: 26,2614 43240 BMN DAD
035132,000600: 26,2615 54622 S61.1B # DO TEST ON -YSM
035133,000601: 26,2616 14645 C(30)LIM # = 1.0 -.5 COS(30)
035134,000602: 26,2617 47004 BOVB RTB
035135,000603: 26,2620 54641 RETRN1
035136,000604: 26,2621 54626 RETRN3
|
|
Page 805
|
035138,000606: 26,2622 43276 S61.1B DCOMP DAD
035139,000607: 26,2623 14645 C(30)LIM # = 1.0 - .5 COS(30)
035140,000608: 26,2624 77404 BOVB EXIT
035141,000609: 26,2625 54631 RETRN2
035142,000610:
035143,000611: 26,2626 05650 RETRN3 TC ALARM
035144,000612: 26,2627 01426 OCT 01426 # IMU UNSATISFACTORY
035145,000613: 26,2630 02633 TC RETRN2 +2
035146,000614:
035147,000615: 26,2631 05650 RETRN2 TC ALARM
035148,000616: 26,2632 01427 OCT 01427 # IMU REVERSED
035149,000617:
035150,000618: 26,2633 35050 +2 CAF V05N09
035151,000619: 26,2634 04662 TC BANKCALL
035152,000620: 26,2635 20676 CADR GODSPR # DO DISPLAY
035153,000621: 26,2636 32646 CA 10SECS
035154,000622: 26,2637 04662 TC BANKCALL
035155,000623: 26,2640 01732 CADR DELAYJOB
035156,000624:
035157,000625: 26,2641 01773 RETRN1 TC 60GENRET
035158,000626:
035159,000627: 26,2642 E7,1431 EBANK= DVCNTR
035160,000628: 26,2642 03226 76067 SERVCAD1 2CADR SERVEXIT
035161,000629:
035162,000630: 26,2644 22111 17335 C(30)LIM 2DEC .566985 # = 1.0 - .5 COS(30)
035163,000631:
035164,000632: 26,2646 01750 10SECS DEC 1000 B-14 # 1000 CS
035165,000633: 26,2647 00000 13560 60SECDP 2DEC 6000 B-28 # 6000 CS
035166,000634:
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|
Page 806
|
035168,000636: # PROGRAM NAME: S61.2 DATE: 14 FEB 67
035169,000637: # MOD NO: 1 LOG SECTION: P61-P67
035170,000638: # MOD BY: MORTH / BAIRNSFATHER
035171,000639: # MOD NO: 2 MOD BY: MORTH/BAIRNSFATHER DATE: 11 MAY 67 ADD 2ND ITER FOR ERAD AT 400K FT.
035172,000640: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 21 NOV 67 VARIABLE MU ADDED.
035173,000641: # MOD NO: 4 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 68 DIFFERENT EARTH/MOON SCALES IN TFF'S
035174,000642:
035175,000643: # FUNCTIONAL DESCRIPTION: CALLED BY P61. PROVIDES DISPLAYS FOR NOUNS N60 AND N63 .
035176,000644: # PROGRAM CALCULATES ENTRY DISPLAY OF MAXIMUM ACCELERATION EXPECTED (GMAX) AND ALSO THE EXPECTED
035177,000645: # INERTIAL VELOCITY (VPRED) AND ENTRY ANGLE (GAMMAEI) THAT WILL OBTAIN AT 400K FT ABOVE THE FISCHER
035178,000646: # ELLIPSOID. PROGRAM ALSO CALCULATES A SECOND DISPLAY RELATIVE TO THE EMSALT ABOVE FISCHER ELLIPSOID
035179,000647: # AND CONSISTS OF RANGE TO SPLASH FROM NOW (RTGO) , PREDICTED INERTIAL VELOCITY (VIO) , AND THE TIME TO
035180,000648: # GO FROM NOW (TTE) .
035181,000649:
035182,000650: # CALLING SEQUENCE: CALL
035183,000651: # S61.2
035184,000652: # C(MPAC) UNSPECIFIED
035185,000653: # PUSHLOC WILL BE SET TO ZERO.
035186,000654:
035187,000655: # SUBROUTINES CALLED: TFFCONIC, CALCTFF, TFF/TRIG, FISHCALC, GETERAD, VGAMCALC
035188,000656:
035189,000657: # NORMAL EXIT MODES: RTB P61.1
035190,000658:
035191,000659: # ALARMS: NONE
035192,000660:
035193,000661: # OUTPUT: THE FOLLOWING REGISTERS ARE WRITTEN IN FOR USE BY DISPLAYS
035194,000662: # GMAX 100 GMAX (-14) G,S MAXIMUM ACCELERATION
035195,000663: # VPRED (-7) M/CS PREDICTED VELOCITY AT 400K FT
035196,000664: # GAMMAEI GAMMA/360 PREDICTED GAMMA AT 400K FT
035197,000665: # FOR TM, DP(GAMMAEI) = (GAMMAEI, RTGO) / 360
035198,000666: # RTGO THETAH/360 RANGE ANGLE TO SPLASH FROM EMSALT EMSALT IS PAD LOADED
035199,000667: # VIO (-7) M/CS INERTIAL VELOCITY AT EMSALT EMSALT IS PAD LOADED
035200,000668: # TTE (-28) CS TIME TO EMSALT EMSALT IS PAD LOADED
035201,000669: # PUSHLOC = 0
035202,000670: # CONIC PARAMETERS STORED IN VAC AREA (SEE TFF SUBROUTINES)
035203,000671:
035204,000672: # ERASABLE INITIALIZATION REQUIRED:
035205,000673: # RONE (-29) M STATE VECTOR LEFT BY USER
035206,000674: # VONE (-7) M/CS STATE VECTOR LEFT BY USER
035207,000675: # URONE UR/2 LEFT BY USER
035208,000676: # UNI (-1) UNIT NORMAL V*R LEFT BY ENTRY / P61
035209,000677: # THETAH THETAH/360 RANGE ANGLE LEFT BY ENTRY / P61
035210,000678: # UNITW (0) UNIT POLAR VECTOR LEFT BY PAD LOAD
035211,000679: # EMSALT (-29) M EMS INTERFACE ALTITUDE LEFT BY PAD LOAD
035212,000680: # ORBITAL REENTRY: 284643 FT, LUNAR REENTRY: 297431 FT.
035213,000681:
035214,000682: # DEBRIS: QPRET,
035215,000683: # ALL PDL LOCATIONS ABOVE 12D, INCLUDING X1,X2,S1,S2
035216,000684: # ALSO PDL+0 ... PDL+5, WHERE INITIAL PUSHLOC = PDL
035217,000685:
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|
Page 807
|
035219,000687: # THE FOLLOWING PUSH LIST LOCATIONS HAVE BEEN RESERVED FOR TFF ROUTINES AND ARE REPEATED HERE FOR CONVENIENCE.
035220,000688: # OF COURSE FOR S61.2 USAGE, EARTH ORIGIN SCALING IS USED.
035221,000689:
035222,000690: # BELOW E: IS USED FOR EARTH ORIGIN SCALE
035223,000691: # M: IS USED FOR MOON ORIGIN SCALE
035224,000692:
035225,000693: # RTERM = 18D TERMINAL RADIUS M E: (-29) M: (-27)
035226,000694: # NRTERM = 16D TERMINAL RADIUS M E: (-29+NR)
035227,000695: # M: (-27+NR)
035228,000696: # RMAG1 = 12D PRESENT RADIUS M E: (-29) M: (-27)
035229,000697: # NRMAG = 32D PRESENT RADIUS M E: (-29+NR)
035230,000698: # M: (-27+NR)
035231,000699: # SDELF/2 SIN(THETA) / 2
035232,000700: # CDELF/2 = 14D COS(THETA) / 2
035233,000701: # TFFX = 34D X, ARGUMENT OF SERIES T(X).
035234,000702: # TFFTEM = 36D ARG FOR TRANSFER ANGLE CALCULATION.
035235,000703: # TFFNP = 28D LC P M E: (-38+2NR) M: (-36+2NR)
035236,000704: # TFF/RTMU= 30D 1/SQRT(MU) E: (17) M: (14)
035237,000705: # TFFVSQ = 20D -(VN.VN/MU) 1/M E: (20) M: (18)
035238,000706:
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|
Page 808
|
035240,000708: 34,3763 BANK 34
035241,000709: 26,2000 SETLOC P60S2
035242,000710: 26,2000 BANK
035243,000711:
035244,000712: 26,2651 COUNT* $$/S61.2
035245,000713: # PDL LEFT AT ZERO BY TARGETNG
035246,000714:
035247,000715: 26,2651 45345 S61.2 DLOAD DSU
035248,000716: 26,2652 02020 EMSALT
035249,000717: 26,2653 15001 290KFT
035250,000718: 26,2654 71244 BPL DLOAD
035251,000719: 26,2655 54775 LUNENT
035252,000720: 26,2656 17354 1/RTMU # ESTABLISH MU FOR ORBITAL ENTRIES
035253,000721: 26,2657 77624 CALLCON CALL
035254,000722: 26,2660 56757 TFFCONIC # FILL VAC AREA WITH CONIC PARAMETERS
035255,000723:
035256,000724: 26,2661 45145 DLOAD CALL
035257,000725: 26,2662 15021 RTRIAL # 1ST GUESS AT TERMINAL RADIUS (-29)
035258,000726: 26,2663 57067 CALCTFF # SAVES MPAC IN RTERM (18D)
035259,000727:
035260,000728: 26,2664 77624 CALL # CALC SDELF/2, CDELF/2
035261,000729: 26,2665 56631 TFF/TRIG # RETURN WITH S(THETA) IN MPAC
035262,000730:
035263,000731: 26,2666 77624 CALL # GET FISCHER RADIUS (-29) M
035264,000732: 26,2667 55030 FISHCALC # ANS IN MPAC AND IN ERADM.
035265,000733:
035266,000734: 26,2670 45015 DAD CALL
035267,000735: 26,2671 02020 EMSALT
035268,000736: 26,2672 57067 CALCTFF # SAVES MPAC IN RTERM (18D)
035269,000737:
035270,000738: 26,2673 77676 DCOMP # NEGATIVE AS IN COUNTDOWN.
035271,000739: 26,2674 03733 STORE TTE1 # DECR TTE FROM BASE TTE1. (RESTART)
035272,000740: # DNLIST AND DSKY WILL USE TTE.
035273,000741: 26,2675 37727 STCALL TTE # LET MISS CONTRL DECR BY ELAPSED TIME
035274,000742: # TTE= TIME FROM NOW TO EMSALT +FISCHER
035275,000743:
035276,000744: 26,2676 56631 TFF/TRIG # S(THETA) IN MPAC ON RETURNING
035277,000745: # AND THETA= RANGE FROM NOW TO EMSALT
035278,000746:
035279,000747: 26,2677 77624 CALL
035280,000748: 26,2700 55030 FISHCALC
035281,000749: 26,2701 77624 CALL
035282,000750: 26,2702 56664 VRCALC
035283,000751: 26,2703 77624 CALL
035284,000752: 26,2704 56651 DISPTARG
035285,000753: 26,2705 77624 CALL
035286,000754: 26,2706 56651 DISPTARG
035287,000755: 26,2707 37714 STCALL RTGO
|
|
Page 809
|
035289,000757: 26,2710 55051 VGAMCALC
035290,000758:
035291,000759: 26,2711 77605 DMP # MPAC = GAMMA
035292,000760: # PDL0 HAS VGAM.
035293,000761: 26,2712 43265 BDDV DAD
035294,000762: 26,2713 15027 VEMSCON # -HS D 180/PI (-14)
035295,000763: 26,2714 00001 0 # VGAM FROM PDL0.
035296,000764: 26,2715 17725 STODL VIO # PREDICTED VELOCITY AT EMSALT.
035297,000765:
035298,000766: # GAMMA AND VGAM AT 300K FT ARE REQUIRED BY GMAX
035299,000767: # ALGORITHM.
035300,000768:
035301,000769: 26,2716 02241 ERADM # EARTH RADIUS FROM GETERAD (-29) M
035302,000770: # = FISCHER RADIUS (-29)
035303,000771:
035304,000772: 26,2717 77615 DAD
035305,000773: 26,2720 06462 300KFT # M (-29)
035306,000774: 26,2721 34023 STCALL RTERM # TERMINAL RADIUS M (-29)
035307,000775:
035308,000776: 26,2722 55046 PREVGAM # VGAMCALC WITH NEW RTERM
035309,000777:
035310,000778: # VBAR = (V(FPS) - 36KF/S) / 20KF/S
035311,000779: # GMAX = (4/(1 + 4.8 VBARSQ))(GAM - 6.05 - 2.4 VBARSQ) - 10(L/D - .3) + 10 ASSUME L/D = 0.3, BANK =0.
035312,000780:
035313,000781: # GMAXCALC
035314,000782: 26,2723 45325 PDDL DSU # GAM TO PDL2
035315,000783: 26,2724 00001 0 # VGAM IS IN PDL0 (-7)
035316,000784: 26,2725 15005 36KFT/S # (-7) M/CS
035317,000785: 26,2726 63471 DDV DSQ
035318,000786: 26,2727 15007 20KFT/S # (-6) M/CS
035319,000787: 26,2730 00001 STORE 0 # VBARSQ (-2) TO PDL0
035320,000788:
035321,000789: 26,2731 43205 DMP DAD
035322,000790: 26,2732 15011 KR1
035323,000791: # GAM, POS DOWN, FROM PDL2
035324,000792: 26,2733 41215 DAD DMP
035325,000793: 26,2734 15013 -6.05DEG
035326,000794: 26,2735 15015 KR2
035327,000795: 26,2736 77725 PDDL # XCH PDL+0 FOR VBARSQ (-2)
035328,000796: 26,2737 43271 DDV DAD
035329,000797: 26,2740 15025 KR4
035330,000798: 26,2741 17366 DP2(-4)
035331,000799: 26,2742 77665 BDDV
035332,000800: # NUM FROM PDL+0
035333,000801: 26,2743 51015 DAD BPL
035334,000802: 26,2744 15017 KR3
035335,000803: 26,2745 54750 +3
035336,000804: 26,2746 77745 DLOAD
035337,000805: 26,2747 15335 HI6ZEROS
035338,000806: 26,2750 17722 STODL GMAX # 100 GMAX (-14)
|
|
Page 810
|
035340,000808: # DISPLAY USES GMAX AS SP, SO LO WORD IS WRITTEN OVER BY VPRED.
035341,000809: 26,2751 02241 ERADM # = FISCHER RADIUS (-29) M
035342,000810: 26,2752 45015 DAD CALL # 2 ND ITERATION FOR FISCHER RADIUS
035343,000811: 26,2753 15023 400KFT
035344,000812: 26,2754 57067 CALCTFF # ESTABLISH TRANSFER ANGLE DATA.
035345,000813: 26,2755 77624 CALL
035346,000814: 26,2756 56631 TFF/TRIG # GET SIN, COS DELF
035347,000815: 26,2757 77624 CALL
035348,000816: 26,2760 55030 FISHCALC # GET CORRESPONDING FISCHER RADIUS.
035349,000817:
035350,000818: 26,2761 73015 DAD LXA,2 # SAVE HI-WORD FOR DOWNLIST.
035351,000819: 26,2762 15023 400KFT # M (-29)
035352,000820: 26,2763 03713 RTGO # (RANGE ANGLE FROM EMSALT) / 360
035353,000821: 26,2764 34023 STCALL RTERM
035354,000822: 26,2765 55046 PREVGAM # VGAMCALC WITH NEW RTERM
035355,000823:
035356,000824: 26,2766 67076 DCOMP SXA,2 # HI-WORD OF EACH ON DOWNLIST.
035357,000825: 26,2767 00155 MPAC +1
035358,000826: 26,2770 17771 STODL GAMMAEI # CONIC GAMMA/360 AT 400K FT. (HI-WORD)
035359,000827: # CONIC RTGO/360 FROM EMSALT (LOW-WORD)
035360,000828: # FOR TM, DP(GAMMAEI) = (GAMMA, RTGO) / 360
035361,000829:
035362,000830: # VGAM FROM PDL+0 (-7)
035363,000831: 26,2771 77626 STADR
035364,000832: 26,2772 74010 STORE VPRED # CONIC VELOCITY AT 400K FT
035365,000833:
035366,000834: 26,2773 77634 RTB
035367,000835: 26,2774 54267 P61.1
035368,000836: # PDL BACK TO ZERO.
035369,000837:
035370,000838: 26,2775 52145 LUNENT DLOAD GOTO
035371,000839: 26,2776 06456 1/RTMUE # ESTABLISH MU FOR LUNAR TYPE ENTRIES
035372,000840: 26,2777 54657 CALLCON
035373,000841: 26,3000 00002 26244 290KFT 2DEC 88392.0 B-29
035374,000842:
035375,000843: 26,3002 00052 05716 KTETA1 2DEC* .421844723 E2 B-14* # 1100 2PI/16384(163.84)
035376,000844:
035377,000845: 26,3004 33335 05707 36KFT/S 2DEC 109.728 B-7 # (-7) M/CS = 36 KFT/S (-7)
035378,000846:
035379,000847: 26,3006 36365 30244 20KFT/S 2DEC 121.92 B-7 # (-6) M/CS = 2 20KFT/S (-7)
035380,000848:
035381,000849: 26,3010 77113 42770 KR1 2DEC -.026666667 # = -2.4 4 / 360
035382,000850:
035383,000851: 26,3012 77354 65030 -6.05DEG 2DEC -.016805556 # = -6.05 / 360
035384,000852:
035385,000853: 26,3014 21450 00001 KR2 2DEC .54931641 # = (360/4) 100 (-14) = 9000 B-14
035386,000854:
035387,000855: 26,3016 01750 00000 KR3 2DEC 1000 B-14 # = 100 (10.0) (-14) G,S
|
|
Page 811
|
035389,000857: # ASSUMES L/D = 0.3, BANK =0.
035390,000858: 26,3020 00305 04541 RTRIAL 2DEC 6460097.18 B-29 # RPAD +284643 FT =21 194 545 FT
035391,000859: # RPAD DEFINED AS 20 909 901.57 FT =6 373 338 M
035392,000860: 26,3022 00003 27040 400KFT 2DEC 121920 B-29 # METERS
035393,000861:
035394,000862: # 300KFT 2DEC 91440 B-29 (-29) M
035395,000863:
035396,000864: # EMSALT 2DEC 86759.2 B-29 284643 FT (-29) M (ORBITAL REENTRY)
035397,000865:
035398,000866: # EMSALT 2DEC 90657 B-29 297431 FT (-29) M (LUNAR REENTRY)
035399,000867:
035400,000868: 26,3024 32525 12525 KR4 2DEC .833333333
035401,000869:
035402,000870: 26,3026 23,2461 300KFT EQUALS MINPERE
035403,000871: 26,3026 77777 76601 VEMSCON 2DEC -.0389676 B-14 # = -HS D / 2 PI (-14) M SQ / CS SQ
035404,000872:
035405,000873: # = -16369 .05G 32.2 .3048 .3048/2 PI (-14)
035406,000874:
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|
Page 812
|
035408,000876: # SUBROUTINE NAME: FISHCALC (USED BY S61.2) DATE: 01.21.67
035409,000877: # MOD NO: 0 LOG SECTION: P61-P67
035410,000878: # MOD BY: MORTH / BAIRNSFATHER
035411,000879: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 MAY 67 INCLUDE GETERAD CALL
035412,000880:
035413,000881: # FUNCTIONAL DESCRIPTION: GIVEN THE PRESENT POSITION, UNITR, CALCULATE A NEW UNITR THAT IS ROTATED THROUGH
035414,000882: # TRANSFER ANGLE, THETA, ALONG TRAJECTORY. THEN CALCULATE SIN(LAT) AND USE TO OBTAIN FISCHER RADIUS.
035415,000883:
035416,000884: # SINCE FISHCALC USES UNI (LEFT BY ENTRY) EARTH SCALING IS ASSUMED. (WILL IMPROVE FOR SUITABLE TENNANT)
035417,000885:
035418,000886: # CALLING SEQUENCE: CALL
035419,000887: # FISHCALC
035420,000888: # ENTER WITH .5 SIN(THETA) IN MPAC.
035421,000889: # PUSHLOC IS AT PDL+0, AN ARBITRARY BASE VALUE IF LEQ 8D
035422,000890:
035423,000891: # SUBROUTINES CALLED: GET ERAD
035424,000892:
035425,000893: # NORMAL EXIT MODE: RVQ
035426,000894:
035427,000895: # EXIT MODES: NONE
035428,000896:
035429,000897: # OUTPUT: ERADM (-29) M IN MPAC ON RETURNING
035430,000898: # NEW UNIT VECTOR NOT SAVED.
035431,000899: # SIN(LAT) NOT SAVED.
035432,000900: # PUSHLOC AT PDL+0
035433,000901:
035434,000902: # ERASEABLE INITIALIZATION REQUIRED:
035435,000903: # SDELF/2 =SIN(THETA) / 2, IN MPAC LEFT BY TFF/TRIG
035436,000904: # CDELF/2 =COS(THETA) / 2, STORED IN PDL 14D LEFT BY TFF/TRIG
035437,000905: # RONE (-29) M LEFT BY USER
035438,000906: # VONE (-7) M/CS LEFT BY USER
035439,000907: # URONE UR/2 LEFT BY USER
035440,000908: # UNI .5 UNIT(V*R) LEFT BY ENTRY / P61
035441,000909: # UNITW UNIT NORTH POLE LEFT BY PAD LOAD
035442,000910:
035443,000911: # DEBRIS: QPRET, PDL+0 ... PDL+5
035444,000912: # - - -
035445,000913: 26,3030 47315 FISHCALC PDVL VXV # URPR = UR CDELF + UHOR SDELF
035446,000914: 26,3031 02343 URONE
035447,000915: 26,3032 03502 UNI
035448,000916: 26,3033 76561 VXSC VSL1
035449,000917: # SIN(THETA) / 2 FROM PDL+0
035450,000918: 26,3034 74315 PDVL VXSC # TO PDL+0, +5
035451,000919: 26,3035 02343 URONE
035452,000920: 26,3036 00017 CDELF/2 # COS(THETA) / 2
035453,000921: 26,3037 45455 VAD STADR
035454,000922: 26,3040 74235 STORE URH # FOR USE IN RTGO FROM EMS DISPLAY
035455,000923: 26,3041 72441 DOT SL1
035456,000924: 26,3042 01714 UNITW # FULL UNIT VECTOR UNIT NORTH
035457,000925: 26,3043 02156 STORE ALPHAV +4 # = .5 SIN(LAT)
035458,000926: 26,3044 77650 DUMPFISH GOTO
035459,000927: 26,3045 26505 GETERAD # SAVES FISCHER RAD (-29) M IN ERADM AND
035460,000928: # IN MPAC. RETURNS TO CALLER VIQ QPRET.
035461,000929:
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|
Page 813
|
035463,000931: # SUBROUTINE NAME: VGAMCALC (USED BY S61.2) DATE: 01.21.67
035464,000932: # MOD NO: 0 LOG SECTION: P61-P67
035465,000933: # MOD BY: MORTH / BAIRNSFATHER
035466,000934: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67
035467,000935: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 21 NOV 67 VARIABLE MU ADDED.
035468,000936: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 68 ACCEPT DIFFERENT EARTH/MOON SCALE
035469,000937:
035470,000938: # FUNCTIONAL DESCRIPTION: EARTH CENTERED VIS VIVA CALCULATION OF TERMINAL VELOCITY AND GAMMA (REL TO
035471,000939: # HORIZONTAL) GIVEN THE SCALAR QUANTITIES: PRESENT RADIUS AND VELOCITY AND THE TERMINAL RADIUS.
035472,000940: # THE USER MUST APPEND PROPER SIGN TO GAMMA, SINCE IT IS CALCULATED AS A POSITIVE NUMBER.
035473,000941: # THE EQUATIONS ARE
035474,000942:
035475,000943: # VGAM = SQRT(VN VN/MU + 2(RN-RTERM)/(RN RTERM) ) RTMU
035476,000944:
035477,000945: # COSGAM = H / RTERM VGAM = SQRT (LCP) / (RTERM VGAM/RTMU)
035478,000946:
035479,000947: # VGAMCALC ASSUMES THAT THE TERMINAL RADIUS IS LESS THAN THE PRESENT RADIUS. BOTH CALCTFF AND CALCTPER
035480,000948: # MAKE THIS ASSUMPTION.
035481,000949:
035482,000950: # CALLING SEQUENCE: CALL STCALL RTERM
035483,000951: # VGAMCALC PREVGAM
035484,000952: # PUSHLOC AT PDL+0, ARBITRARY IF LEQ 12D
035485,000953: # C(MPAC) UNSPECIFIED C(MPAC)=NEW RTERM
035486,000954:
035487,000955: # SUBROUTINES CALLED: NONE
035488,000956:
035489,000957: # NORMAL EXIT MODE: RVQ
035490,000958:
035491,000959: # ALARMS: NONE
035492,000960: #
035493,000961: # OUTPUT: GAMMA / 360 IN MPAC, POSITIVE NUMBER
035494,000962: # VGAM E: (-7) M: (-5) M/CS IN PDL+0
035495,000963: # PUSHLOC AT PDL+2
035496,000964:
035497,000965: # ERASABLE INITIALIZATION REQD:
035498,000966: # TFF/RTMU E: (17) M: (14) 1/SQRT(MU) LEFT BY TFFCONIC.
035499,000967: # RMAG1 E: (-29) M: (-27) M PRESENT RADIUS LENGTH LEFT BY TFFCONIC
035500,000968: # NRMAG E: (-29+NR) M NORM LENGTH OF PRESENT POSITION LEFT BY TFFCONIC
035501,000969: # M: (-27+NR)
035502,000970: # RTERM E: (-29) M: (-27) M TERMINAL RADIUS LENGTH LEFT BY CALCTFF
035503,000971: # NRTERM E: (-29+NR) M NORM LENGTH OF TERMINAL RADIUS LEFT BY CALCTFF
035504,000972: # M: (-27+NR)
035505,000973: # TFFVSQ E: (20) M: (18) 1/M -(V SQ/MU): PRESENT VELOCITY, NORM LEFT BY TFFCONIC
035506,000974: # TFFNP E: (-38+2NR) M LCP, SEMI-LATUS RECTUM, WEIGHT NR LEFT BY TFFCONIC
035507,000975: # M: (-36+2NR)
035508,000976:
035509,000977: # DEBRIS: QPRET, PDL+0 ... PDL+3
035510,000978: # RTERM, NRTERM IF PREVGAM ENTERED.
|
|
Page 814
|
035512,000980:
035513,000981: 26,3046 77657 PREVGAM SL* # ENTER WITH NEW RTERM IN MPAC
035514,000982: # E: (-29) M: (-27)
035515,000983: 26,3047 20201 0,1 # X1 = -NR
035516,000984: 26,3050 00021 STORE NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035517,000985:
035518,000986: 26,3051 41345 VGAMCALC DLOAD DMP
035519,000987: 26,3052 00041 NRMAG # RMAG M E: (-29+NR) M: (-27+NR)
035520,000988: 26,3053 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035521,000989: 26,3054 45325 PDDL DSU # RMAG RTERM M E: (-58+2NR) M: (-54+2NR)
035522,000990: 26,3055 00041 NRMAG # RMAG M E: (-29+NR) M: (-27+NR)
035523,000991: 26,3056 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035524,000992: 26,3057 56257 SL* DDV # 2(RN-RTERM) E: (-30+NR) M: (-28+NR)
035525,000993: 26,3060 20171 0 -8D,1 # (-8+NR)
035526,000994: # PUSH UP PRODUCT.
035527,000995: 26,3061 77625 DSU
035528,000996: 26,3062 00025 TFFVSQ # -(V SQ/MU) E: (20) M: (18)
035529,000997: 26,3063 41566 SQRT PUSH # SAVE VGAM/RT(MU) FOR NOW. E: (10) M: (9)
035530,000998: 26,3064 65271 DDV PDDL # XCH PDL+0, LEAVING VGAM FOR OUTPUT.
035531,000999: # VGAM TO PDL M/CS E: (-7) M: (-2)
035532,001000: 26,3065 00037 TFF/RTMU # E: (17) M: (14)
035533,001001: 26,3066 65205 DMP PDDL # RTERM VGAM/RTMU E: (-19+NR) M: (-18+NR)
035534,001002: 26,3067 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035535,001003: 26,3070 00035 TFFNP # LC P =H.H/MU M E: (-38+2NR) M: (-36+2NR)
035536,001004: 26,3071 56366 SQRT DDV # E: (-19+NR) M: (-18+NR)
035537,001005: # PUSH UP DEN E: (-19+NR) M: (-18+NR)
035538,001006: # USE DDV OVFL AS LIMITER (|COS| <1.0)
035539,001007: 26,3072 65542 SR1 ACOS
035540,001008: 26,3073 77616 DUMPVGAM RVQ
035541,001009: # CALLER MUST SUPPLY OWN SIGN ...
035542,001010: # 22W 27MS
035543,001011:
|
|
Page 815
|
035545,001013: # SUBROUTINE NAME: TFF/TRIG (USED BY S61.2) DATE 01.17.67
035546,001014: # MOD NO: 0 LOG SECTION: P61-P67
035547,001015: # MOD BY: RR BAIRNSFATHER
035548,001016: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 14 APR 67
035549,001017: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 68 ACCEPT DIFFERENT EARTH/MOON SCALE
035550,001018:
035551,001019: # FUNCTIONAL DESCRIPTION: USED BY ENTRY DISPLAY TO CALCULATE SIN(THETA), COS(THETA) FROM DATA LEFT IN
035552,001020: # PDL BY TFF SUBROUTINES. THE EQNS ARE
035553,001021:
035554,001022: # COS(THETA) = 1-2 ABS(ARG) / (RN RTERM (1+X) )
035555,001023: # 2
035556,001024: # SIN(THETA) = SGN(ARG) SQRT(1-COS (THETA) )
035557,001025:
035558,001026: # WHERE THETA = TRANSFER ANGLE
035559,001027: # AND ARG = P Z ABS(Z) IF ALFA ZZ LEQ 1
035560,001028: # ARG = (P / ALFA) SGN(Q1 + R 1/Z) IF ALFA Z Z G 1
035561,001029: # AND ARG HAS BEEN AFFIXED WITH THE SIGN OF SIN(THETA).
035562,001030:
035563,001031: # CALLING SEQUENCE: CALL
035564,001032: # TFF/TRIG
035565,001033: # PUSHLOC AT PDL+0, ARBITRARY IF NOT EQ 14D
035566,001034: # C(MPAC) UNSPECIFIED
035567,001035:
035568,001036: # SUBROUTINES CALLED: NONE
035569,001037:
035570,001038: # NORMAL EXIT MODES: RVQ
035571,001039:
035572,001040: # ALARMS: NONE
035573,001041:
035574,001042: # OUTPUT: C(MPAC) = .5 SIN(THETA)
035575,001043: # CDELF/2 = .5 COS(THETA) (IN PDL 14D)
035576,001044: # PUSHLOC AT PDL+0
035577,001045:
035578,001046: # ERASABLE INITIALIZATION REQUIRED:
035579,001047: # TFFX X LEFT BY CALCTFF OR CALCTPER
035580,001048: # TFFTEM E: (-59+2NR) ARG LEFT BY CALCTFF OR CALCTPER
035581,001049: # M: (-55+2NR) WHERE ARG = LCP ZZ SGN(DELF) OR ARG = LCP/ALFA SGN(DELF)
035582,001050: # NRTERM E: (-29+NR) M NORM LENGTH OF TERMINAL RADIUS LEFT BY CALCTFF OR CALCTPER
035583,001051: # M: (-27+NR)
035584,001052: # NRMAG E: (-29+NR) M NORM LENGTH OF PRESENT POSITION LEFT BY TFFCONIC
035585,001053: # M: (-27+NR)
035586,001054:
035587,001055: # DEBRIS: QPRET, CDELF/2
035588,001056:
035589,001057: 27,2631 BANK 27
035590,001058: 27,2000 SETLOC P60S5
035591,001059: 27,2000 BANK
035592,001060: 27,2631 70545 TFF/TRIG DLOAD SR1
035593,001061: 27,2632 00043 TFFX
035594,001062: 27,2633 41215 DAD DMP
035595,001063: 27,2634 15333 HIDPHALF
035596,001064: 27,2635 00041 NRMAG # RMAG M E: (-29+NR) M: (-27+NR)
035597,001065: 27,2636 55205 DMP BDDV
035598,001066: 27,2637 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035599,001067: 27,2640 00045 TFFTEM # P ZSQ OR P/ALFA E: (-59+2NR) M: (-55+2NR)
035600,001068: 27,2641 44246 ABS BDSU # THE SIGN IS FOR SDELF.
035601,001069: 27,2642 15333 HIDPHALF
035602,001070: 27,2643 00017 STORE CDELF/2 # .5 COS(THETA)
035603,001071: 27,2644 57516 DSQ DCOMP # KEEP HONEST FOR SQRT.
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|
Page 816
|
035605,001073: 27,2645 75415 DAD SQRT
035606,001074: 27,2646 15325 HIDP1/4
035607,001075: 27,2647 43565 DUMPTRIG SIGN RVQ
035608,001076: 27,2650 00045 TFFTEM # AFFIX SIGN(DELE/2)
035609,001077: # RETURN WITH .5 SIN(THETA) IN MPAC
035610,001078:
035611,001079: # 16W 15MS
035612,001080:
035613,001081: 27,2651 77620 DISPTARG STQ # C(MPAC) = TRGO ESTIMATE
035614,001082: 27,2652 03373 60GENRET
035615,001083: 27,2653 45205 DMP DSU
035616,001084: 27,2654 15003 KTETA1
035617,001085: 27,2655 03733 TTE1
035618,001086: 27,2656 37606 STCALL DTEAROT
035619,001087: 27,2657 46225 EARROT2
035620,001088: 27,2660 77624 CALL
035621,001089: 27,2661 56664 VRCALC
035622,001090: 27,2662 77650 GOTO
035623,001091: 27,2663 03373 60GENRET
035624,001092: 27,2664 50375 VRCALC VLOAD DOT
035625,001093: 27,2665 03542 URH
035626,001094: 27,2666 03474 RT
035627,001095: 27,2667 65512 SL2 ACOS
035628,001096: 27,2670 77616 RVQ
035629,001097:
035630,001098: # END OF PROGRAM S61.2
035631,001099:
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|
Page 817
|
035633,001101: # PROGRAM DESCRIPTION S62.3 DATE 10JAN67
035634,001102: # MOD NO 1 LOG SECTION P60-P67
035635,001103: # MOD BY ZELDIN
035636,001104: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 15 MAY 67 CHANGED TO REF COORDS.
035637,001105: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 ALFAPAD CHANGES MADE.
035638,001106:
035639,001107: # FUNCTIONAL DESCRIPTION
035640,001108:
035641,001109: # COMPUTE DESIRED GIMBOL ANGLES FOR ENTRY ATTITUDE
035642,001110: # THE FOLLOWING TRAJECTORY TRIAD IS AVAILABLE IN MEMORY AND IS COMPUTED EACH 2 SECONDS BY CM/POSE IN
035643,001111: # REFERENCE COORDINATES (V = VELOCITY RELATIVE TO EARTH) :
035644,001112:
035645,001113: # UXA = -UNIT(V)
035646,001114: # UYA = UNIT(V*R)
035647,001115: # UZA = UXA*UYA
035648,001116:
035649,001117: # GENERATE A DESIRED BODY TRIAD FOR TRIMMED FLIGHT WITH RESPECT TO THE RELATIVE VELOCITY VECTOR, USING
035650,001118: # ROLL COMMAND AND TRIM ANGLE OF ATTACK:
035651,001119:
035652,001120: # UXD = UNIT(UYD*UXA) SIN(ALFATRIM) + UXA COS(ALFATRIM)
035653,001121: # UYD = UYA COS(ROLLC) + UZA SIN(ROLLC)
035654,001122: # UZD = UXD * UYD
035655,001123:
035656,001124: # USE THE DESIRED SET (IN REFERENCE COORDS) AND REFSMMAT TO CALL CALCGA AND OBTAIN GIMBAL ANGLES
035657,001125: # IN 2S, C IN MPAC, +2 AND THETAD, +2.
035658,001126:
035659,001127: # CALLING SEQUENCE
035660,001128:
035661,001129: # L CALL
035662,001130: # L+1 S62.3
035663,001131:
035664,001132: # NORMAL EXIT MODE
035665,001133:
035666,001134: # RETURN VIA QPRET DIRECTLY FROM CALCGA.
035667,001135:
035668,001136: # SUBROUTINES CALLED
035669,001137:
035670,001138: # CALCGA
035671,001139:
035672,001140: # ALARM OR ABORT MODES
035673,001141:
035674,001142: # NONE
035675,001143:
035676,001144: # ERASABLE INITIALIZATION REQUIRED
035677,001145:
035678,001146: # ROLLC ROLL COMMAND DP 1:S COMP AT 1REV
035679,001147: # ALFAPAD SP 1S,C / 180 LEFT BY PAD LOAD ALFATRIM IS NEGATIVE.
035680,001148: # UXA/2 REF COORDS LEFT BY CM/POSE
035681,001149: # UYA/2 REF COORDS LEFT BY CM/POSE
035682,001150: # UZA/2 REF COORDS LEFT BY CM/POSE
035683,001151:
035684,001152: # OUTPUT
035685,001153: #
035686,001154: # CPHI GIMBAL ANGLES (O,I,M) 2:S COMP TP (O,I,M)/180
035687,001155:
035688,001156: # DEBRIS
035689,001157:
035690,001158: # QTEMP, QPRET, PUSHLIST
035691,001159:
035692,001160: 10,2376 BANK 10
035693,001161: 10,2000 SETLOC P60S4
035694,001162: 10,2000 BANK
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Page 818
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035696,001164: 10,2376 COUNT* $$/S62.3
035697,001165:
035698,001166: 10,2376 67201 S62.3 SETPD SLOAD
035699,001167: 10,2377 00001 0
035700,001168: 10,2400 03012 ALFAPAD # ALFATRIM / 180, ALFA IS NEG.
035701,001169: 10,2401 41542 SR1 PUSH
035702,001170: 10,2402 65346 COS PDDL # XCH PDL, COS TO PDL0
035703,001171: 10,2403 65356 SIN PDDL # SIN TO PDL2
035704,001172: 10,2404 03316 ROLLC
035705,001173: 10,2405 74346 COS VXSC
035706,001174: 10,2406 03550 UYA/2 # REF COORDS
035707,001175: 10,2407 73525 PDDL SIN # PUSH VECTOR INTO PDL4,.9
035708,001176: 10,2410 03316 ROLLC
035709,001177: 10,2411 53361 VXSC VAD
035710,001178: 10,2412 03556 UZA/2 # REF COORDS
035711,001179: # VECTOR FROM PDL4, 9
035712,001180: 10,2413 77772 VSL1
035713,001181: 10,2414 02722 STORE YNB # = UYD REF COORDS
035714,001182:
035715,001183: 10,2415 76435 VXV VSL1
035716,001184: 10,2416 03542 UXA/2 # REF COORDS
035717,001185: 10,2417 65361 VXSC PDDL
035718,001186: # SIN TRIM FROM PDL2
035719,001187: # XCH PDL0 FOR COS TRIM
035720,001188: 10,2420 53361 VXSC VAD
035721,001189: 10,2421 03542 UXA/2 # REF COORDS
035722,001190: # FROM PDL0
035723,001191: 10,2422 77772 VSL1
035724,001192: 10,2423 02714 STORE XNB # X SC AXIS (.5 UNIT) REF COORDS
035725,001193:
035726,001194: 10,2424 76435 VXV VSL1
035727,001195: 10,2425 02722 YNB
035728,001196: 10,2426 26730 STOVL ZNB # Z SC IN REF COOR. SCALED AT 2
035729,001197: 10,2427 01736 REFSMMAT
035730,001198: 10,2430 26672 STOVL XSM
035731,001199: 10,2431 01744 REFSMMAT +6
035732,001200: 10,2432 26700 STOVL YSM
035733,001201: 10,2433 01752 REFSMMAT +12D
035734,001202: 10,2434 02706 STORE ZSM
035735,001203:
035736,001204: 10,2435 52014 CLEAR GOTO
035737,001205: 10,2436 00260 CPHIFLAG # CAUSE CALCGA TO STORE ANS IN TP CPHI
035738,001206: 10,2437 47311 CALCGA
035739,001207: # CALCGA WILL RETURN TO ORIGINAL CALLER
035740,001208: # VIA QPRET WITH 2,S COMP. ANGLES IN CPHI
035741,001209:
035742,001210:
035743,001211:
End of include-file P61-P67.agc. Parent file is MAIN.agc