Source Code
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These source-code files are part of a reconstructed copy of Artemis 071, the
first release of the Apollo 15 through 17 Command Module (CM) Apollo Guidance
Computer (AGC) software.
The reconstruction began with source code of Artemis 072 previously transcribed
from a digitized copy of that program. The code was then updated by undoing
changes between the two versions. The reconstruction was verified by matching
memory-bank checksums to those listed in drawing 2021154-. Note that page
numbers in the reconstructed code match those on the Artemis 072 printout,
although the changed code would likely have changed page numbers for a real
Artemis 071 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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035147,000002: ## Copyright: Public domain.
035148,000003: ## Filename: P61-P67.agc
035149,000004: ## Purpose: A section of Artemis revision 071.
035150,000005: ## It is part of the reconstructed source code for the first
035151,000006: ## release of the flight software for the Command Module's
035152,000007: ## (CM) Apollo Guidance Computer (AGC) for Apollo 15 through
035153,000008: ## 17. The code has been recreated from a copy of Artemis 072.
035154,000009: ## It has been adapted such that the resulting bugger words
035155,000010: ## exactly match those specified for Artemis 071 in NASA
035156,000011: ## drawing 2021154-, which gives relatively high confidence
035157,000012: ## that the reconstruction is correct.
035158,000013: ## Reference: 792
035159,000014: ## Assembler: yaYUL
035160,000015: ## Contact: Ron Burkey <info@sandroid.org>.
035161,000016: ## Website: www.ibiblio.org/apollo/index.html
035162,000017: ## Mod history: 2019-08-14 MAS Created from Artemis 072.
035163,000018:
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Page 792
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035165,000020:
035166,000021: # PROGRAM: P61
035167,000022: # MOD NO.: 0 MAR. 13, 1967
035168,000023: # MOD BY: R. HIRSCHKOP
035169,000024: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 22 JUN 67 RESTARTS.
035170,000025: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP CHANGES.
035171,000026: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 8 MAY 68 DELETE CMSM MANEUVER (PCR 50)
035172,000027: # MOD NO: 4 MOD BY: RR BAIRNSFATHER DATE: 1 JUL 69 PCR 787: TICK TTE
035173,000028: # FUNCTION: TO CALCULATE AND DISPLAY EMS INITIALIZATION DATA
035174,000029: # CALLING SEQUENCE- BY V37
035175,000030: # EXIT- TO P62
035176,000031: # SUBROUTINE CALLS- S61.1 , S61.3 , GOFLASH , FLAGUP , R02BOTH
035177,000032: # ERASABLE INITIALIZATION:
035178,000033: # EMSALT (-29) M .05G ALTITUDE ABOVE FISCHER ELLIPSOID PAD LOADED.
035179,000034: # ALFAPAD /180 HYPERSONIC CM TRIM ANGLE OF ATTACK PAD LOADED
035180,000035: # OUTPUT: THE FOLLOWING REGISTERS ARE WRITTEN IN FOR USE BY DISPLAYS
035181,000036: # GMAX 100 GMAX (-14) G,S MAXIMUM ACCELERATION
035182,000037: # VPRED (-7) M/CS PREDICTED VELOCITY AT 400K FT
035183,000038: # GAMMAEI GAMMA/360 PREDICTED GAMMA AT 400K FT
035184,000039: # RTGO THETAH/360 RANGE ANGLE TO SPLASH FROM EMSALT EMSALT IS PAD LOADED
035185,000040: # VIO (-7) M/CS INERTIAL VELOCITY AT EMSALT EMSALT IS PAD LOADED
035186,000041: # TTE (-28) CS TIME TO EMSALT EMSALT IS PAD LOADED
035187,000042: # LAT(SPL) /360 TARGET LOCATION LEFT BY DSKY
035188,000043: # LNG(SPL) /360 TARGET LOCATION LEFT BY DSKY
035189,000044: # HEADSUP (0) +1 = LIFT DOWN, -1 = LIFT UP LEFT BY DSKY
035190,000045: # DEBRIS: SEE SUBROUTINES.
035191,000046:
035192,000047: 26,2000 SETLOC P60S
035193,000048: 26,2000 BANK
035194,000049:
035195,000050: 26,2234 E6,1661 EBANK= AOG
035196,000051:
035197,000052: 26,2234 COUNT* $$/P61
035198,000053:
035199,000054: 26,2234 34753 P61 CA BIT14 # EXTENDED VERB SHOULD BE FREE THIS CLOSE
035200,000055: 26,2235 55247 TS EXTVBACT # TO V37
035201,000056: # LOCK OUT EXTENDED VERBS SO CAN USE TFF
035202,000057: # ROUTINES.EXT VERB ERASE IS USED
035203,000058:
035204,000059: 26,2236 44770 CS ONE # REMOVE IF HEADSUP EVER ON UPLINK DATA
035205,000060: 26,2237 55726 TS HEADSUP # PRELOAD
035206,000061:
035207,000062: 26,2240 02546 TC S61.1 # CHECK STATE VECTOR AND IMU ORIENTATION
035208,000063: # RV 60GENRET. DOES PHASCHNG, GROUP 4.
035209,000064:
035210,000065: 26,2241 35034 CA V06N61 # LAT(SPL) LNG(SPL) HEADSUP
035211,000066: # XXX.XX DEG XXX.XX DEG XXXXX.
035212,000067: 26,2242 05540 TC VNFLASHR
035213,000068: 26,2243 02247 TC P61.4
035214,000069: 26,2244 05402 P61.3 TC PHASCHNG
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Page 793
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035216,000071: 26,2245 00014 OCT 00014
035217,000072:
035218,000073: 26,2246 05205 TC ENDOFJOB
035219,000074:
035220,000075: 26,2247 22007 P61.4 ZL
035221,000076: 26,2250 11726 CCS HEADSUP # C(HEADSUP)= +1/-1
035222,000077: 26,2251 34753 CA BIT14 # IF HEADSUP POS,ROLLC =180 DEG.(LIFT DWN)
035223,000078: 26,2252 12253 NOOP # IF HEADSUP NEG,ROLLC =0 (LIFT UP)
035224,000079: 26,2253 53716 DXCH ROLLC # ROLLC IS USED BY S62.3: GIM ANG AT .05G
035225,000080:
035226,000081: 26,2254 34753 AGIN,MON CA BIT14 # LOCK OUT EXTENDED VERBS.(REDUNDANT ON
035227,000082: 26,2255 55247 TS EXTVBACT # INITIAL PASS)
035228,000083:
035229,000084: 26,2256 06006 TC INTPRET
035230,000085: 26,2257 77745 NEWRNVN DLOAD
035231,000086: 26,2260 01044 PIPTIME # SAVE TIME OF RN,VN TO DETERMINE IF AN
035232,000087: 26,2261 37651 STCALL MM # UPDATE HAS OCCURRED
035233,000088: 26,2262 52063 STARTEN1 # INITIALIZE
035234,000089: 26,2263 43175 VLOAD CLEAR # 'TTE' WILL BE DECREMENTED UNTIL
035235,000090: 26,2264 01030 RN
035236,000091: 26,2265 03274 .05GSW # THE DRAG > 0.05 G .
035237,000092: # .05GSW SET =1 BY FRESH START.
035238,000093:
035239,000094: 26,2266 02320 STORE RONE
035240,000095: 26,2267 77656 UNIT
035241,000096: 26,2270 26334 STOVL URONE
035242,000097: 26,2271 01036 VN
035243,000098: 26,2272 02326 STORE VONE
035244,000099: 26,2273 53435 VXV UNIT
035245,000100: 26,2274 02334 URONE
035246,000101: 26,2275 03502 STORE UNI
035247,000102: 26,2276 45345 DUMPP61 DLOAD DSU
035248,000103: 26,2277 03651 MM # INITIAL VALUE OF PIPTIME
035249,000104: 26,2300 01044 PIPTIME
035250,000105: 26,2301 45040 BMN CALRB
035251,000106: 26,2302 54257 NEWRNVN # UPDATED... GO TRY AGAIN
035252,000107: 26,2303 54652 S61.2 # GET DISPLAY DATA FOR N60 AND N63
035253,000108: # AND RETURN IN BASIC, BELOW.
035254,000109: 26,2304 05527 P61.1 TC CLEARMRK
035255,000110: 26,2305 35033 CA V06N60 # GMAX VPRED GAMMAEI
035256,000111: # XXX.XX G XXXXX. FPS XXX.XX DEG
035257,000112: 26,2306 05535 TC VNFLASH
035258,000113:
035259,000114: # 'TICKTTE' DECREMENTS 'TTE' DISPLAY NOUN N63 AT A 2 SECOND RATE. 'TICKTTE' IS LOCATED IN 'SERVICER' AND
035260,000115: # OPERATES ONLY DURING P61 THROUGH P63. THUS N63 IS 'ON CALL' & ON ENTRY DOWNLIST THROUGH P63.
035261,000116: # 'TICKTTE' WILL GIVE PROPER ANSWER IN EVENT OF RESTART OR A RECYCLE VIA V32.
035262,000117:
035263,000118: 26,2307 32425 CA V16N63 # RTGO VIO TTE
035264,000119: # XXXX.X NM XXXXX. FPS XXBXX M,S
035265,000120: 26,2310 04636 TC BANKCALL
035266,000121: 26,2311 20743 CADR GOFLASH
035267,000122: 26,2312 04103 TC GOTOPOOH
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Page 794
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035269,000124: 26,2313 02315 TC +2
035270,000125: 26,2314 02254 TC AGIN,MON # REDO CONIC CALC. ASSUME EXT VB INACTIVE
035271,000126:
035272,000127: # .... THEN FALL INTO P62
035273,000128:
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Page 795
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035275,000130:
035276,000131: # PROGRAM- P62
035277,000132: # MOD NO.- 0 MAR. 13, 1967
035278,000133: # MOD BY- R. HIRSCHKOP
035279,000134: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 67
035280,000135: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 22 JUN 67 RESTARTS.
035281,000136: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP CHANGES.
035282,000137: # MOD NO: 4 MOD BY: RR BAIRNSFATHER DATE: 8 MAY 68 MOVE START OF DESIRED GIMBAL CALC.
035283,000138: # FUNCTION- 1) TO NOTIFY CREW WHEN GNC SYSTEM IS PREPARED FOR CM/SM SEPARATION
035284,000139: # 2) TO ORIENT THE CM TO THE CORRECT ATTITUDE FOR ATMOSPHERIC ENTRY
035285,000140: # CALLING SEQUENCE- BY V37 OR DIRECTLY FROM P61
035286,000141: # EXIT- TO P63
035287,000142: # ERASABLE INITIALIZATION:
035288,000143: # ALFAPAD LEFT BY PAD LOAD
035289,000144: # LADPAD LEFT BY PAD LOAD
035290,000145: # LODPAD LEFT BY PAD LOAD
035291,000146: # LAT(SPL) (MAY BE CHANGED BELOW) LEFT BY DSKY, VIA P61
035292,000147: # LNG(SPL) (MAY BE CHANGED BELOW) LEFT BY DSKY, VIA P61
035293,000148: # HEADSUP (MAY BE CHANGED BELOW) LEFT BY DSKY, VIA P61
035294,000149: # SUBROUTINE CALLS: NEWMODEX , S61.1 , CM/DAPIC , CM/DAPON , R02BOTH , GOPERF1 , GOFLASH , GODSPR
035295,000150:
035296,000151: 26,2315 COUNT* $$/P62
035297,000152:
035298,000153: 26,2315 05344 +2 TC NEWMODEX # MODE CHANGE IF ENTERED FROM P61
035299,000154: 26,2316 00076 MM 62 B-14 # MODE CHANGE AUTOMATIC VIA V 37.
035300,000155: 26,2317 34770 CA ONE
035301,000156: 26,2320 54332 TS DNLSTCOD
035302,000157:
035303,000158: 26,2321 02546 P62 TC S61.1 # CHECK STATE VECTOR AND IMU ORIENTATION.
035304,000159:
035305,000160: 26,2322 06006 TC INTPRET
035306,000161: 26,2323 47131 SSP RTB
035307,000162: 26,2324 03325 POSEXIT
035308,000163: 26,2325 54402 P62.3 # CALCULATE DESIRED .05G GIMBAL ANGLES,
035309,000164: # WITHOUT DISPLAY.
035310,000165: 26,2326 41703 CM/DAPIC # START CM/POSE AND BODY RATE CALC
035311,000166:
035312,000167: # DOES 2PHSCHNG, OCT 40116, OCT 05024, OCT 13000.
035313,000168: # CM/DAPIC SETS EBANK = EBAOG
035314,000169: # AND RETURNS IN BASIC TO P62.2.
035315,000170: 26,2327 00006 P62.2 EXTEND
035316,000171: 26,2330 32431 DCA POSECADR # CONTINUE WITH CM/POSE AFTER AV G.
035317,000172: 26,2331 53062 DXCH AVEGEXIT
035318,000173:
035319,000174: 26,2332 32545 CAF OCT41 # REQUEST SEPARATION
035320,000175: 26,2333 04636 TC BANKCALL
035321,000176: 26,2334 21147 CADR GOPERF1R
035322,000177: 26,2335 04103 TC GOTOPOOH
035323,000178: 26,2336 02341 TC +3 # PROCEED
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Page 796
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035325,000180: # NOTE: NODOFLAG WILL BE SET IN CM/DAPON. <<<
035326,000181: 26,2337 02332 TC -5 # ENTER
035327,000182: 26,2340 02244 TC P61.3 # FOR PHASCHNG AND ENDOFJOB.
035328,000183:
035329,000184: 26,2341 04655 +3 TC POSTJUMP
035330,000185: 26,2342 41624 CADR CM/DAPON # DISABLE RCS DAP, ENABLE ENTRY DAP AND
035331,000186: # DO ATTITUDE HOLD.
035332,000187:
035333,000188: # WILL IDLE UNTIL CM/POSE DOES ONE UPDATE.
035334,000189: # CM/DAPON DOES NO PHASCHNG.
035335,000190:
035336,000191: 26,2343 35034 P62.1 CA V06N61 # LAT(SPL) LNG(SPL) HEADSUP
035337,000192: # XXX.XX DEG XXX.XX DEG 0000X.
035338,000193:
035339,000194: # TERMINATE ATTITUDE HOLD. SET UP COMMANDS:
035340,000195: # ROLLC, ALFACOM, BETACOM. BEGIN MANUVER TO
035341,000196: # ENTRY ATTITUDE.
035342,000197:
035343,000198: 26,2344 04636 TC BANKCALL
035344,000199: 26,2345 20743 CADR GOFLASH
035345,000200: 26,2346 02343 TC -3
035346,000201: 26,2347 02351 TC +2
035347,000202: 26,2350 02343 TC -5
035348,000203:
035349,000204: 26,2351 05402 TC PHASCHNG
035350,000205: 26,2352 04024 OCT 04024 # USE ENTRYVN FOR DISPLAY BELOW.
035351,000206:
035352,000207: # EBANK WAS SET IN CM/DAPON TO EBAOG
035353,000208:
035354,000209: 26,2353 11726 CCS HEADSUP # C(HEADSUP) = +/- 1
035355,000210: 26,2354 34753 CA BIT14 # IF HEADSUP POS, ROLLC=180 DEG (LIFT DWN)
035356,000211: 26,2355 12356 NOOP # IF HEADSUP NEG, ROLLC=0 DEG (LIFT UP)
035357,000212: 26,2356 55715 TS ROLLC
035358,000213: 26,2357 31411 CA ALFAPAD # NOMINAL ALFATRIM PAD LOADED, NEG. NO.
035359,000214: 26,2360 22007 ZL
035360,000215: 26,2361 53604 DXCH ALFACOM # SET ALFACOM = ALFA TRIM, BETACOM=0
035361,000216:
035362,000217: 26,2362 34770 CA ONE # PERMITS EXDAP2 TO CHANGE FLAG TO +0
035363,000218: 26,2363 55727 TS P63FLAG # AS INDICATOR. STARTS UP P63.
035364,000219:
035365,000220: 26,2364 35025 CA V06N22 # SET UP DISPLAY FOR CDU DESIRED VALUES
035366,000221: 26,2365 55122 TS ENTRYVN # FROM ENTRY ATTITUDE CALC, THAT IS
035367,000222: # ALREADY GOING.
035368,000223: 26,2366 05547 TC UPFLAG # TURN ON ENTRY DISPLAY
035369,000224: 26,2367 00134 ADRES ENTRYDSP # ENTRYDSP = 92D BIT 13 FLAG 6
035370,000225: # SKIP
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Page 797
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035372,000227: 26,2370 41700 CS CMDAPMOD # GO DIRECTLY TO P63 IF BODY ATTITUDE
035373,000228: 26,2371 74770 MASK ONE # IS SUCH THAT THE DELAY TASK: WAKEP62
035374,000229: 26,2372 00006 EXTEND # WILL BE OMITTED.
035375,000230: 26,2373 12422 BZF P63.1 # DISABLE GRP 4, GO TO ENDOFJOB.
035376,000231: # (IE, CONTINUE IF CMDAPMOD = -1, OR +0)
035377,000232: 26,2374 02406 TC P63
035378,000233:
035379,000234: # PUT JOB TO SLEEP UNTIL VEHICLE MANUVER HAS
035380,000235: # REDUCED ALFA TO +/-45 DEG. CONSIDER REMAINING
035381,000236: # 65 DEG (25 DEG IF ALFA NEG) TO ALFA TRIM TO
035382,000237: # OCCUR AT 3 DEG/SEC, AND TERMINATE P62 AT THAT
035383,000238: # TIME.
035384,000239: # TASK WAKEP62 IS CALLED FROM ENTRY DAP.
035385,000240:
035386,000241: 26,2375 35052 WAKEP62 CA PRIO13
035387,000242: 26,2376 05121 TC NOVAC
035388,000243: 26,2377 E6,1661 EBANK= AOG
035389,000244: 26,2377 02406 54066 2CADR P63
035390,000245:
035391,000246: 26,2401 05314 TC TASKOVER
035392,000247:
035393,000248: # EACH 2 SEC, CALCULATE GIMBAL ANGLES FOR ENTRY CON-
035394,000249: # DITIONS THAT WILL HOLD IF REORIENTATION WERE MADE
035395,000250: # AT PRESENT RN, VN. COME HERE FROM CM/POSE AND ALSO
035396,000251: # IN KEPLER PHASE OF ENTRY.
035397,000252:
035398,000253: 26,2402 52131 P62.3 SSP GOTO # SET RETURN ADDRESS SO THAT ROUTINE
035399,000254: 26,2403 00053 QPRET # GOES DIRECTLY TO ENTRY GUIDANCE EXIT
035400,000255: 26,2404 53574 ENDEXIT # THAT DOES ENTRY DISPLAY, GRP 5.
035401,000256: 26,2405 20412 S62.3 # PUT DESIRED CDU VALUES IN CPHI'S FOR
035402,000257: # N22 DISPLAY.
035403,000258:
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Page 798
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035405,000260: # P63
035406,000261: # PROGRAM- P63
035407,000262: # MOD NO.- 0 MAR. 13, 1967
035408,000263: # MOD BY- R. HIRSCHKOP
035409,000264: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 22 JIN 67 RESTARTS.
035410,000265: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 14 JUL 67 REVISED RESTARTS
035411,000266: # FUNCTION- 1) TO INITIALIZE THE ENTRY EQUATIONS
035412,000267: # 2) TO CONTINUE TO HOLD THE CM TO THE CORRECT ATTITUDE WITH RESPECT TO THE ATMOSPHERE FOR
035413,000268: # THE ONSET OF ENTRY DECELERATION. ROLL ANGLE IS LIFT UP/DOWN AS SPECIFIED BY HEADSUP.
035414,000269: # 3) TO SENSE .05G
035415,000270: # CALLING SEQUENCE- DIRECTLY FROM P62
035416,000271: # EXIT- TO ENDOFJOB
035417,000272: # SUBROUTINE CALLS- NEWMODEX , GODSPR
035418,000273:
035419,000274: 26,2406 COUNT* $$/P63
035420,000275:
035421,000276: 26,2406 05344 P63 TC NEWMODEX
035422,000277: 26,2407 00077 MM 63 B-14
035423,000278:
035424,000279: # ARRIVE WITH EBANK = AOG.
035425,000280:
035426,000281: 26,2410 32427 CA ENTCADR # CONTINUE AT STARTENT AFTER CM/POSE.
035427,000282:
035428,000283: # AT END OF STARTENT, CHANGE ADDRESS IN GOTOADDR
035429,000284: # TO CONTINUE AT SCALEPOP THEREAFTER.
035430,000285:
035431,000286: 26,2411 55724 TS POSEXIT
035432,000287:
035433,000288: 26,2412 32426 CA V06N64 # G VI R TO SPLSH
035434,000289: # XXX.XX G XXXXX. FPS XXXX.X NM
035435,000290: 26,2413 55122 TS ENTRYVN # FOR DISPLAY CALL IN OVERNOUT.
035436,000291:
035437,000292: 26,2414 44770 CS ONE # IN CASE FLAG IS LEFT AT +1 BY DAP. THE
035438,000293: 26,2415 55727 TS P63FLAG # -1 ASSURES THAT EXO-ATM DAP WILL NOT
035439,000294: # CALL P63 OUT OF SEQUENCE IN P66.
035440,000295:
035441,000296: 26,2416 05402 TC PHASCHNG # THIS IS REQUIRED TO PRESERVE CLEANDSP
035442,000297: 26,2417 00004 OCT 00004 # RETURN IN EVENT OF AN EXTENDED VERB..
035443,000298:
035444,000299: 26,2420 04636 TC BANKCALL # FLUSH 'N22' DISPLAY, IF ON. (OMIT
035445,000300: 26,2421 20715 CADR CLEANDSP # DISPLAY DURING 'STARTENT' PASS.)
035446,000301:
035447,000302: 26,2422 05402 P63.1 TC PHASCHNG
035448,000303: 26,2423 00004 OCT 00004 # DISABLE. DISPLAY RESTARTED VIA ENTRY.
035449,000304:
035450,000305: 26,2424 05205 TC ENDOFJOB
035451,000306:
035452,000307: 26,2425 04077 V16N63 VN 1663
035453,000308: 26,2426 01500 V06N64 VN 0664
035454,000309: 26,2427 52000 ENTCADR CADR STARTENT
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Page 799
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035456,000311: 26,2430 E7,1451 EBANK= RTINIT # TO CARY OVER INTO ENTRY STEERING.
035457,000312: 26,2430 03404 76067 POSECADR 2CADR CM/POSE
035458,000313:
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Page 800
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035460,000315:
035461,000316: # PROGRAM- P64
035462,000317: # MOD NO.- 1 SEPT. 19, 1967
035463,000318: # MOD BY- R. HIRSCHKOP
035464,000319: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 8 MAY 68 REVISED COMMENTS FOR COLOSSUS
035465,000320: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 1 MAR '69 N74
035466,000321: # FUNCTION- 1. TO START ENTRY GUIDANCE AT .05G SELECTING ROLL ATTITUDE, CONSTANT DRAG LEVEL, AND
035467,000322: # DRAG THRESHOLD, KA , WHICH ARE KEYED TO THE .05G POINT.
035468,000323: # 2. SELECT FINAL PHASE P67 IF V < 27000 FPS WHEN .2G OCCURS.
035469,000324: # 3. ITERATE FOR UP-CONTROL SOLUTION P65 IF V > 27000 FPS AND IF ALTITUDE RATE AND DRAG
035470,000325: # LEVEL CONDITIONS ARE SATISFIED. ENTER P65 WHEN CONSTANT DRAG CONTROLLER HAS BROUGHT RANGE
035471,000326: # AS PREDICTED TO WITHIN 25 NM OF DESIRED RANGE.
035472,000327: # 4. SELECT FINAL PHASE P67 IF NO UP-CONTROL SOLUTION EXISTS WITH VL > 18000 FPS.
035473,000328: # CALLING SEQUENCE- BY RTB FROM REENTRY CONTROL
035474,000329: # EXIT- BACK TO REENTRY CONTROL
035475,000330: # SUBROUTINE CALLS- NEWMODEX
035476,000331:
035477,000332: 26,2000 SETLOC P60S1
035478,000333: 26,2000 BANK
035479,000334:
035480,000335: # THIS DISPLAY IS CALLED EACH PASS THROUGH STEERING. RESTART PROTECTION IS VIA STEERING.
035481,000336:
035482,000337: 26,2432 COUNT* $$/P64
035483,000338:
035484,000339: 26,2432 05344 P64 TC NEWMODEX # ENTER VIA RTB WHEN .05G IS EXCEEDED.
035485,000340: 26,2433 00100 MM 64 B-14
035486,000341: 26,2434 32437 CA V06N74 # ROLLC VI D
035487,000342: # XXX.XX DEG XXXXX. FPS XXX.XX G
035488,000343: 26,2435 55122 TS ENTRYVN # DISPLAY VIA OVERNOUT.
035489,000344:
035490,000345: 26,2436 06030 TC DANZIG # ... AND CONTINUE IN INITROLL ...
035491,000346:
035492,000347: 26,2437 01512 V06N74 VN 0674
035493,000348:
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Page 801
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035495,000350: # PROGRAM: P65
035496,000351: # MOD NO: 0 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP ADDITION.
035497,000352: # FUNCTION: TO CONTINUE ENTRY GUIDANCE, USING THE UP-CONTROL PHASE TO STEER TO A CONTROLLED EXIT
035498,000353: # CONDITION. THIS PHASE TERMINATES A) IF D < Q7 FPSS, GO TO P66 ,
035499,000354: # B) IF RDOT NEG, AND IF V < VL +500 FPS, GO TO P67.
035500,000355:
035501,000356: # CALLING SEQUENCE: BY RTB FROM REENTRY CONTROL
035502,000357: # EXIT: BACK TO REENTRY CONTROL, OR TO ENDOFJOB.
035503,000358: # SUBROUTINE CALLS: NEWMODEX
035504,000359:
035505,000360: 26,2440 COUNT* $$/P65
035506,000361:
035507,000362: 26,2440 05344 P65 TC NEWMODEX # ENTER VIA RTB WHEN RANGE < 25 N M OF
035508,000363: 26,2441 00101 MM 65 B-14 # TARGET.
035509,000364:
035510,000365: 26,2442 35052 CA PRIO13
035511,000366: 26,2443 05121 TC NOVAC
035512,000367: 26,2444 1122 EBANK= ENTRYVN
035513,000368: 26,2444 02456 54062 2CADR P65.1
035514,000369:
035515,000370: 26,2446 05362 TC 2PHSCHNG # 2 PHASE CHG REQUIRED TO PREVENT RE-
035516,000371: 26,2447 00554 OCT 00554 # STARTING FLASHING DISPLAY TWICE.
035517,000372: 26,2450 10035 OCT 10035 # 4.55 SPOT AND SERVICER, HERE.
035518,000373: 26,2451 01,2223 4P55SPT1 = 4.55SPOT
035519,000374: 26,2451 01,2250 5P3SPT8 = 5.3SPOT
035520,000375: 26,2451 06006 TC INTPRET
035521,000376: 26,2452 47131 SSP RTB
035522,000377: 26,2453 03646 GOTOADDR # CHANGE ENTRY MODE TO UPCONTRL.
035523,000378: 26,2454 53034 UPCONTRL
035524,000379: 26,2455 52120 REFAZE10 # GO HERE TO REESTABLISH ENTRY SEQUENCER.
035525,000380: # AND CONTINUE AT UPCONTRL...
035526,000381:
035527,000382: 26,2456 05561 P65.1 TC DOWNFLAG
035528,000383: 26,2457 00134 ADRES ENTRYDSP # ENTRYDSP = 92D BIT 13 FLAG 6
035529,000384:
035530,000385: 26,2460 32472 CA V16N69 # ROLLC DL (Q7) VL
035531,000386: 26,2461 04636 TC BANKCALL # XXX.XX DEG XXX.XX G XXXXX. FPS
035532,000387: 26,2462 21101 CADR GOFLASHR
035533,000388: 26,2463 02460 TC -3 # NODOFLAG IS SET..
035534,000389: 26,2464 02467 TC +3
035535,000390: 26,2465 02460 TC -5
035536,000391: 26,2466 02244 TC P61.3 # EST. GRP 4 FOR DSPLAY AND DO ENDOFJOB
035537,000392: # IF PROCEED, CONTINUE.
035538,000393: 26,2467 05547 TC UPFLAG
035539,000394: 26,2470 00134 ADRES ENTRYDSP # ENTRYDSP = 92D BIT 13 FLAG 6
035540,000395:
035541,000396: 26,2471 02422 TC P63.1 # DISABLE GRP 4, START UP ENTRY DISPLAY
035542,000397: # N06V68 VIA OVERNOUT, AS USED IN P64.
|
|
Page 802
|
035544,000399: 26,2472 04105 V16N69 VN 1669
035545,000400:
|
|
Page 803
|
035547,000402: # PROGRAM: P66
035548,000403: # MOD NO: 0 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP ADDITIONS.
035549,000404: # FUNCTION: KEEP CM ATTITUDE IN TRIM TO THE RELATIVE VELOCITY VECTOR. ENTRY GUIDANCE STOPS GENERATING
035550,000405: # ROLL COMMANDS UNTIL DRAG BUILDS UP TO Q7+0.5 FPSS.
035551,000406: # CALLING SEQUENCE: VIA RTB FROM REENTRY CONTROL.
035552,000407: # EXIT: BACK TO REENTRY CONTROL.
035553,000408: # SUBROUTINE CALLS: NEWMODEX
035554,000409:
035555,000410: 26,2473 COUNT* $$/P66
035556,000411:
035557,000412: 26,2473 05344 P66 TC NEWMODEX # ENTER VIA RTB WHEN D < Q7 FPSS
035558,000413: 26,2474 00102 MM 66 B-14
035559,000414:
035560,000415: 26,2475 35025 CA V06N22 # OGA IGA MGA
035561,000416: # XXX.XX DEG XXX.XX DEG XXX.XX DEG
035562,000417: 26,2476 02502 TC P66END # IN CASE CAME FROM P65, GO DISABLE GRP4,
035563,000418: # AND SET ENTRYDSP TO DO DISPLAY VIA
035564,000419: # OVERNOUT.
035565,000420:
035566,000421: # ... AND CONTINUE AT KEP2
035567,000422:
|
|
Page 804
|
035569,000424: # P67
035570,000425:
035571,000426: # PROGRAM- P67
035572,000427: # MOD NO.- 0 MAR. 16, 1967
035573,000428: # MOD BY- R. HIRSCHKOP
035574,000429: # FUNCTION- TO TERMINATE STEERING WHEN THE CM VELOCITY WRT EARTH = 1000 FT/SEC
035575,000430: # CALLING SEQUENCE-
035576,000431: # EXIT- TO POOH
035577,000432: # SUBROUTINE CALLS- GOFLASH
035578,000433:
035579,000434: # THIS DISPLAY IS CALLED EACH PASS THROUGH STEERING. RESTART PROTECTION IS VIA STEERING.
035580,000435:
035581,000436: 26,2477 COUNT* $$/P67
035582,000437:
035583,000438: 26,2477 05344 P67 TC NEWMODEX # ENTER VIA RTB
035584,000439: 26,2500 00103 MM 67 B-14
035585,000440: 26,2501 32510 CA V06N66 # ROLLC XRNGERR DNRNGERR
035586,000441: # XXX.XX DEG XXXX.X NM XXXX.X NM
035587,000442: 26,2502 55122 P66END TS ENTRYVN # DISPLAY VIA OVERNOUT.
035588,000443:
035589,000444: 26,2503 05547 TC UPFLAG # (IN CASE CAME FROM P65. ENTRY DISPLAY
035590,000445: 26,2504 00134 ADRES ENTRYDSP # WILL FLUSH FLASHING DISP. IF STILL ON)
035591,000446: # BIT 13 FLAG 6
035592,000447: 26,2505 05402 KILLGRP4 TC PHASCHNG # DISABLE GRP4, IN CASE CAME FROM HUNTEST.
035593,000448: 26,2506 00004 OCT 00004 # (COME TO KILLGRP4 VIA RTB, RET TO CALLER)
035594,000449:
035595,000450: 26,2507 06030 TC DANZIG # ... AND CONTINUE AT PREDICT3 ...
035596,000451:
035597,000452: 26,2510 01502 V06N66 VN 0666
035598,000453:
035599,000454: 26,2000 SETLOC P60S2
035600,000455: 26,2000 BANK
035601,000456:
035602,000457: 26,2511 32544 P67.1 CA V16N67 # RTOGO LAT LONG
035603,000458: # XXXX.X NM XXX.XX DEG XXX.XX DEG
035604,000459: 26,2512 04636 TC BANKCALL
035605,000460: 26,2513 20743 CADR GOFLASH
035606,000461: 26,2514 02517 TC +3 # EFFECTIVE GOTOPOOH
035607,000462: 26,2515 02517 TC +2
035608,000463: 26,2516 02511 TC P67.1 # REDO
035609,000464:
035610,000465: 26,2517 00004 INHINT
035611,000466: 26,2520 34767 CA CM/DSBIT
035612,000467: 26,2521 64770 AD GYMDIBIT
035613,000468: 26,2522 40000 COM
035614,000469: 26,2523 70102 MASK CM/FLAGS # CM/DSTBY, GAMDIFSW
035615,000470: 26,2524 54102 TS CM/FLAGS
035616,000471: 26,2525 00003 RELINT
|
|
Page 805
|
035618,000473: 26,2526 00006 EXTEND
035619,000474: 26,2527 32644 DCA SERVCAD2
035620,000475: 26,2530 53062 DXCH AVEGEXIT
035621,000476:
035622,000477: 26,2531 14103 TCF GOTOPOOH
035623,000478:
|
|
Page 806
|
035625,000480: 26,2532 43175 P67.2 VLOAD CLEAR # CALC PRESENT LAT, LONG, ALT.
035626,000481: 26,2533 01030 RN
035627,000482: 26,2534 00662 ERADFLAG # USE PAD RAD FOR ALT. (NOT SEEN ANYWAY)
035628,000483: 26,2535 16152 STODL ALPHAV
035629,000484: 26,2536 01044 PIPTIME # USE TIME OF RN
035630,000485: 26,2537 45014 CLEAR CALL
035631,000486: 26,2540 01663 LUNAFLAG
035632,000487: 26,2541 26453 LAT-LONG
035633,000488: 26,2542 77634 P67.3 RTB # ENTRY EXIT THAT OMITS DISPLAY.
035634,000489: 26,2543 53607 SERVNOUT
035635,000490:
035636,000491: 26,2544 04103 V16N67 VN 1667
035637,000492: 26,2545 00041 OCT41 OCT 41
035638,000493: 26,2546 26,2643 SERVCAD2 = SERVCAD1
035639,000494:
|
|
Page 807
|
035641,000496: # SUBROUTINE NAME: S61.1
035642,000497: # MOD NO: 0 DATE: 21 FEB 67
035643,000498: # MOD BY: RR BAIRNSFATHER LOG SECTION: P61-P67
035644,000499: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 22 JUN 67 RESTARTS.
035645,000500: # FUNCTIONAL DESCRIPTION: CALLED BY BOTH P61 AND P62
035646,000501: # FIRST, TEST TO SEE IF AVERAGEG IS ON. IF NOT, UPDATE THE STATE VECTOR TO PRESENT TIME + TOLERANCE
035647,000502: # AND TURN ON AVERAGEG AT THAT TIME, AND CONTINUE. OTHERWISE CONTINUE: SEE IF IMU Y AXIS IS
035648,000503: # WITHIN 30 DEG OF V*R. IF YES, EXIT SUBROUTINE S61.1. IF NO, SEE IF -Y AXIS OF IMU IS WITHIN
035649,000504: # 30 DEG OF V*R. IF YES, DISPLAY ALARM: 01427 IMU REVERSED.
035650,000505: # IF NO, DISPLAY ALARM: 01426 IMU UNSATISFACTORY.
035651,000506: # IN EITHER OF THESE LAST 2 CASES, WAIT 10 SEC AND THEN EXIT SUBROUTINE S61.1.
035652,000507:
035653,000508: # REMARK: THERE WILL BE A SHORT 10 SEC DELAY IF AN ALARM EXIT IS TAKEN. THE DELAY FOR INTEGRATION IS
035654,000509: # AS SHORT AS CAN BE MADE, BUT IS ARBITRARY SINCE IT DEPENDS ON THE AGE OF THE STATE VECTOR.
035655,000510:
035656,000511: # CALLING SEQUENCE: CALL
035657,000512: # S61.1
035658,000513: # C(MPAC) UNSPECIFIED
035659,000514: # PUSHLOC UNSPECIFIED
035660,000515:
035661,000516: # SUBROUTINES CALLED: LOADTIME, CSMPREC, TPAGREE,
035662,000517: # WAITLIST, JOBSLEEP, JOBWAKE, PREREAD, ALARM, GODSPR, BANKCALL, DELAYJOB
035663,000518: # NORMAL EXIT MODES: RVQ
035664,000519: # ALARMS: 01426 IMU UNSATISFACTORY
035665,000520: # 01427 IMU REVERSED
035666,000521: # OUTPUT: POSSIBLE ALARMS
035667,000522: # POSSIBLY TDEC1, RATT, VATT, RN, VN
035668,000523: # ERASABLE INITIALIZATION REQUIRED:
035669,000524: # AVEGFLAG AVERAGEG ON OR OFF LEFT BY SERVICER
035670,000525: # PIPTIME (-28) CS TIME OF PIPA UPDATE LEFT BY READACCS
035671,000526: # RN (-29) M STATE VECTOR LEFT BY AVERAGEG
035672,000527: # VN (-7) M/CS STATE VECTOR LEFT BY AVERAGEG
035673,000528: # REFSMMAT (-1) .5 REF TO SM MATRIX LEFT BY LAST IMU ALIGNMENT
035674,000529:
035675,000530: # DEBRIS: QPRET
035676,000531: # POSSIBLY PIPTIME1, RATT, VATT, TDEC1, RN1, VN1, QTEMP, X1 IF UPDATED
035677,000532: # PUSH LIST LOCS USED BY CSMPREC
035678,000533:
035679,000534: 26,2546 E6,1661 EBANK= AOG # FOR 60GENRET, S61DT
035680,000535: 26,2000 SETLOC P60S3
035681,000536: 26,2000 BANK
035682,000537:
035683,000538: 26,2546 COUNT* $$/S61.1
035684,000539:
035685,000540: 26,2546 00006 S61.1 EXTEND
035686,000541: 26,2547 23773 QXCH 60GENRET # SAVE RET ADDR IN EB 6
035687,000542: 26,2550 04636 TC BANKCALL
035688,000543: 26,2551 03731 CADR R02BOTH
035689,000544: 26,2552 06006 TC INTPRET
035690,000545:
035691,000546: 26,2553 45014 BON CALRB
|
|
Page 808
|
035693,000548: 26,2554 00716 AVEGFLAG # IS AVERAGEG ON
035694,000549: 26,2555 54605 S61.1A # YES
035695,000550: 26,2556 27566 MIDTOAV2 # GET FUTURE STATE VECTOR SOON AS CAN
035696,000551:
035697,000552: 26,2557 30155 CA MPAC +1 # RETURN INHINTED ***
035698,000553: 26,2560 55774 TS S61DT # FOR RESTART.
035699,000554: 26,2561 05233 TC WAITLIST
035700,000555: 26,2562 E7,1425 EBANK= DVTOTAL
035701,000556: 26,2562 02567 54067 2CADR S61.1C
035702,000557:
035703,000558: 26,2564 05402 TC PHASCHNG
035704,000559: 26,2565 40434 OCT 40434
035705,000560: 26,2566 01,2204 4P43SPT1 = 4.43SPOT
035706,000561: 26,2566 05205 TC ENDOFJOB
035707,000562:
035708,000563: 26,2567 35052 S61.1C CA PRIO13
035709,000564: 26,2570 05135 TC FINDVAC
035710,000565: 26,2571 E6,1661 EBANK= AOG
035711,000566: 26,2571 02604 54066 2CADR S61.1A-1
035712,000567:
035713,000568: 26,2573 00006 EXTEND
035714,000569: 26,2574 32644 DCA SERVCAD1 # HE WHO STARTS AVERAGEG MUST SERVICE
035715,000570: 26,2575 53062 DXCH AVEGEXIT # THE EXIT.
035716,000571:
035717,000572: 26,2576 05362 TC 2PHSCHNG
035718,000573: 26,2577 00454 OCT 00454
035719,000574: 26,2600 00175 OCT 00175
035720,000575: 26,2601 01,2207 4P45SPT1 = 4.45SPOT
035721,000576: 26,2601 01,2272 5P17SPT1 = 5.17SPOT
035722,000577: 26,2601 04606 TC E7SETTER
035723,000578:
035724,000579: 26,2602 04655 TC POSTJUMP
035725,000580: 26,2603 76607 CADR PREREAD # PREREAD DOES TC TASKOVER.
035726,000581:
035727,000582: 26,2604 06006 S61.1A-1 TC INTPRET
035728,000583: 26,2605 77204 S61.1A BOVB VLOAD
035729,000584: 26,2606 57544 TCDANZIG # TURN OFF OVFIND, IF ON
035730,000585: 26,2607 01036 VN # VN (-7) M/CS
035731,000586: 26,2610 64235 VXV MXV
035732,000587: 26,2611 01030 RN # RN (-29) M
035733,000588: 26,2612 01734 REFSMMAT # .5 UNIT MATRIX
035734,000589: 26,2613 71256 UNIT DLOAD
035735,000590: 26,2614 00160 MPAC +3 # GET COS(THETA)/2
035736,000591: 26,2615 43240 BMN DAD
035737,000592: 26,2616 54623 S61.1B # DO TEST ON -YSM
035738,000593: 26,2617 14646 C(30)LIM # = 1.0 -.5 COS(30)
035739,000594: 26,2620 47004 BOVB RTB
035740,000595: 26,2621 54642 RETRN1
035741,000596: 26,2622 54627 RETRN3
|
|
Page 809
|
035743,000598: 26,2623 43276 S61.1B DCOMP DAD
035744,000599: 26,2624 14646 C(30)LIM # = 1.0 - .5 COS(30)
035745,000600: 26,2625 77404 BOVB EXIT
035746,000601: 26,2626 54632 RETRN2
035747,000602:
035748,000603: 26,2627 05671 RETRN3 TC ALARM
035749,000604: 26,2630 01426 OCT 01426 # IMU UNSATISFACTORY
035750,000605: 26,2631 02634 TC RETRN2 +2
035751,000606:
035752,000607: 26,2632 05671 RETRN2 TC ALARM
035753,000608: 26,2633 01427 OCT 01427 # IMU REVERSED
035754,000609:
035755,000610: 26,2634 35023 +2 CAF V05N09
035756,000611: 26,2635 04636 TC BANKCALL
035757,000612: 26,2636 20710 CADR GODSPR # DO DISPLAY
035758,000613: 26,2637 32647 CA 10SECS
035759,000614: 26,2640 04636 TC BANKCALL
035760,000615: 26,2641 01731 CADR DELAYJOB
035761,000616:
035762,000617: 26,2642 01773 RETRN1 TC 60GENRET
035763,000618:
035764,000619: 26,2643 E7,1425 EBANK= DVTOTAL
035765,000620: 26,2643 03143 76067 SERVCAD1 2CADR SERVEXIT
035766,000621: 26,2645 22111 17335 C(30)LIM 2DEC .566985 # = 1.0 - .5 COS(30)
035767,000622: 26,2647 01750 10SECS DEC 1000 B-14 # 1000 CS
035768,000623: 26,2650 00000 13560 60SECDP 2DEC 6000 B-28 # 6000 CS
035769,000624:
|
|
Page 810
|
035771,000626: # PROGRAM NAME: S61.2 DATE: 14 FEB 67
035772,000627: # MOD NO: 1 LOG SECTION: P61-P67
035773,000628: # MOD BY: MORTH / BAIRNSFATHER
035774,000629: # MOD NO: 2 MOD BY: MORTH/BAIRNSFATHER DATE: 11 MAY 67 ADD 2ND ITER FOR ERAD AT 400K FT.
035775,000630: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 21 NOV 67 VARIABLE MU ADDED.
035776,000631: # MOD NO: 4 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 68 DIFFERENT EARTH/MOON SCALES IN TFF'S
035777,000632: # FUNCTIONAL DESCRIPTION: CALLED BY P61. PROVIDES DISPLAYS FOR NOUNS N60 AND N63 .
035778,000633: # PROGRAM CALCULATES ENTRY DISPLAY OF MAXIMUM ACCELERATION EXPECTED (GMAX) AND ALSO THE EXPECTED
035779,000634: # INERTIAL VELOCITY (VPRED) AND ENTRY ANGLE (GAMMAEI) THAT WILL OBTAIN AT 400K FT ABOVE THE FISCHER
035780,000635: # ELLIPSOID. PROGRAM ALSO CALCULATES A SECOND DISPLAY RELATIVE TO THE EMSALT ABOVE FISCHER ELLIPSOID
035781,000636: # AND CONSISTS OF RANGE TO SPLASH FROM NOW (RTGO) , PREDICTED INERTIAL VELOCITY (VIO) , AND THE TIME TO
035782,000637: # GO FROM NOW (TTE) .
035783,000638: # CALLING SEQUENCE: CALL
035784,000639: # S61.2
035785,000640: # C(MPAC) UNSPECIFIED
035786,000641: # PUSHLOC WILL BE SET TO ZERO.
035787,000642:
035788,000643: # SUBROUTINES CALLED: TFFCONIC, CALCTFF, TFF/TRIG, FISHCALC, GETERAD, VGAMCALC
035789,000644: # NORMAL EXIT MODES: RTB P61.1
035790,000645: # ALARMS: NONE
035791,000646: # OUTPUT: THE FOLLOWING REGISTERS ARE WRITTEN IN FOR USE BY DISPLAYS
035792,000647: # GMAX 100 GMAX (-14) G,S MAXIMUM ACCELERATION
035793,000648: # VPRED (-7) M/CS PREDICTED VELOCITY AT 400K FT
035794,000649: # GAMMAEI GAMMA/360 PREDICTED GAMMA AT 400K FT
035795,000650: # FOR TM, DP(GAMMAEI) = (GAMMAEI, RTGO) / 360
035796,000651: # RTGO THETAH/360 RANGE ANGLE TO SPLASH FROM EMSALT EMSALT IS PAD LOADED
035797,000652: # VIO (-7) M/CS INERTIAL VELOCITY AT EMSALT EMSALT IS PAD LOADED
035798,000653: # TTE (-28) CS TIME TO EMSALT EMSALT IS PAD LOADED
035799,000654:
035800,000655: # PUSHLOC = 0
035801,000656: # CONIC PARAMETERS STORED IN VAC AREA (SEE TFF SUBROUTINES)
035802,000657: # ERASABLE INITIALIZATION REQUIRED:
035803,000658: # RONE (-29) M STATE VECTOR LEFT BY USER
035804,000659: # VONE (-7) M/CS STATE VECTOR LEFT BY USER
035805,000660: # URONE UR/2 LEFT BY USER
035806,000661: # UNI (-1) UNIT NORMAL V*R LEFT BY ENTRY / P61
035807,000662: # THETAH THETAH/360 RANGE ANGLE LEFT BY ENTRY / P61
035808,000663: # UNITW (0) UNIT POLAR VECTOR LEFT BY PAD LOAD
035809,000664: # EMSALT (-29) M EMS INTERFACE ALTITUDE LEFT BY PAD LOAD
035810,000665: # ORBITAL REENTRY: 284643 FT, LUNAR REENTRY: 297431 FT.
035811,000666: # DEBRIS: QPRET,
035812,000667: # ALL PDL LOCATIONS ABOVE 12D, INCLUDING X1,X2,S1,S2
035813,000668: # ALSO PDL+0 ... PDL+5, WHERE INITIAL PUSHLOC = PDL
035814,000669:
|
|
Page 811
|
035816,000671:
035817,000672: # THE FOLLOWING PUSH LIST LOCATIONS HAVE BEEN RESERVED FOR TFF ROUTINES AND ARE REPEATED HERE FOR CONVENIENCE.
035818,000673: # OF COURSE FOR S61.2 USAGE, EARTH ORIGIN SCALING IS USED.
035819,000674:
035820,000675: # BELOW E: IS USED FOR EARTH ORIGIN SCALE
035821,000676: # M: IS USED FOR MOON ORIGIN SCALE
035822,000677:
035823,000678: # RTERM = 18D TERMINAL RADIUS M E: (-29) M: (-27)
035824,000679: # NRTERM = 16D TERMINAL RADIUS M E: (-29+NR)
035825,000680: # M: (-27+NR)
035826,000681: # RMAG1 = 12D PRESENT RADIUS M E: (-29) M: (-27)
035827,000682: # NRMAG = 32D PRESENT RADIUS M E: (-29+NR)
035828,000683: # M: (-27+NR)
035829,000684: # SDELF/2 SIN(THETA) / 2
035830,000685: # CDELF/2 = 14D COS(THETA) / 2
035831,000686: # TFFX = 34D X, ARGUMENT OF SERIES T(X).
035832,000687: # TFFTEM = 36D ARG FOR TRANSFER ANGLE CALCULATION.
035833,000688: # TFFNP = 28D LC P M E: (-38+2NR) M: (-36+2NR)
035834,000689: # TFF/RTMU= 30D 1/SQRT(MU) E: (17) M: (14)
035835,000690: # TFFVSQ = 20D -(VN.VN/MU) 1/M E: (20) M: (18)
035836,000691:
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|
Page 812
|
035838,000693: 26,2000 SETLOC P60S2
035839,000694: 26,2000 BANK
035840,000695:
035841,000696: 26,2652 COUNT* $$/S61.2
035842,000697:
035843,000698: # PDL LEFT AT ZERO BY TARGETNG
035844,000699:
035845,000700: 26,2652 45345 S61.2 DLOAD DSU
035846,000701: 26,2653 02020 EMSALT
035847,000702: 26,2654 15006 290KFT
035848,000703: 26,2655 71244 BPL DLOAD
035849,000704: 26,2656 55002 LUNENT
035850,000705: 26,2657 31757 1/RTMU # ESTABLISH MU FOR ORBITAL ENTRIES
035851,000706: 26,2660 77624 CALLCON CALL
035852,000707: 26,2661 57151 TFFCONIC # FILL VAC AREA WITH CONIC PARAMETERS
035853,000708:
035854,000709: 26,2662 45145 DLOAD CALL
035855,000710: 26,2663 15024 RTRIAL # 1 ST GUESS AT TERMINAL RADIUS (-29)
035856,000711: 26,2664 57261 CALCTFF # SAVES MPAC IN RTERM (18D)
035857,000712:
035858,000713: 26,2665 77624 CALL # CALC SDELF/2, CDELF/2
035859,000714: 26,2666 57052 TFF/TRIG # RETURN WITH S(THETA) IN MPAC
035860,000715:
035861,000716: 26,2667 77624 CALL # GET FISCHER RADIUS (-29) M
035862,000717: 26,2670 55033 FISHCALC # ANS IN MPAC AND IN ERADM.
035863,000718:
035864,000719: 26,2671 45015 DAD CALL
035865,000720: 26,2672 02020 EMSALT
035866,000721: 26,2673 57261 CALCTFF # SAVES MPAC IN RTERM (18D)
035867,000722:
035868,000723: 26,2674 03733 STORE TTE1 # USED IN TARGET ITERATION (DISPTARG)
035869,000724: 26,2675 57415 DAD DCOMP # DECR 'TTE' FROM BASE 'TTE2' IN 'SERVICER
035870,000725: 26,2676 03651 MM # 'PIPTIME' FOR STATE VECTOR
035871,000726: # DNLIST AND DSKY WILL USE TTE.
035872,000727: 26,2677 03735 STORE TTE2 # TTE=PIPTIME+TTE2=-(TTE1+MM-PIPTIME)
035873,000728: 26,2700 77615 DAD # DECREMENT 'TTE' FOR DISPLAY AND DOWNLINK
035874,000729: 26,2701 01044 PIPTIME # UNTIL SERVICER COMES ALONG.
035875,000730: 26,2702 37727 STCALL TTE # 'TTE' IS NEGATIVE AS IN COUNTDOWN.
035876,000731:
035877,000732: # TTE= TIME FROM NOW TO EMSALT +FISCHER
035878,000733:
035879,000734: 26,2703 57052 TFF/TRIG # S(THETA) IN MPAC ON RETURNING
035880,000735: # AND THETA= RANGE FROM NOW TO EMSALT
035881,000736:
035882,000737: 26,2704 77624 CALL
035883,000738: 26,2705 55033 FISHCALC
035884,000739: 26,2706 77624 CALL
035885,000740: 26,2707 11744 VRCALC
035886,000741: 26,2710 77624 CALL
|
|
Page 813
|
035888,000743: 26,2711 11731 DISPTARG
035889,000744: 26,2712 77624 CALL
035890,000745: 26,2713 11731 DISPTARG
035891,000746: 26,2714 37714 STCALL RTGO
035892,000747: 26,2715 55054 VGAMCALC
035893,000748:
035894,000749: 26,2716 77605 DMP # MPAC = GAMMA
035895,000750: # PDL0 HAS VGAM.
035896,000751: 26,2717 43265 BDDV DAD
035897,000752: 26,2720 15032 VEMSCON # -HS D 180/PI (-14)
035898,000753: 26,2721 00001 0 # VGAM FROM PDL0.
035899,000754: 26,2722 17725 STODL VIO # PREDICTED VELOCITY AT EMSALT.
035900,000755:
035901,000756: # GAMMA AND VGAM AT 300K FT ARE REQUIRED BY GMAX
035902,000757: # ALGORITHM.
035903,000758:
035904,000759: 26,2723 02240 ERADM # EARTH RADIUS FROM GETERAD (-29) M
035905,000760: # = FISCHER RADIUS (-29)
035906,000761: 26,2724 77615 DAD
035907,000762: 26,2725 06456 300KFT # M (-29)
035908,000763: 26,2726 34023 STCALL RTERM # TERMINAL RADIUS M (-29)
035909,000764:
035910,000765: 26,2727 55051 PREVGAM # VGAMCALC WITH NEW RTERM
035911,000766:
035912,000767: # VBAR = (V(FPS) - 36KF/S) / 20KF/S
035913,000768: # GMAX = (4/(1 + 4.8 VBARSQ))(GAM -6.05 -2.4 VBARSQ) - 10(L/D - .3) + 10 ASSUME L/D = 0.3, BANK =0.
035914,000769:
035915,000770: # GMAXCALC
035916,000771: 26,2730 45325 PDDL DSU # GAM TO PDL2
035917,000772: 26,2731 00001 0 # VGAM IS IN PDL0 (-7)
035918,000773: 26,2732 15010 36KFT/S # (-7) M/CS
035919,000774: 26,2733 63471 DDV DSQ
035920,000775: 26,2734 15012 20KFT/S # (-6) M/CS
035921,000776: 26,2735 00001 STORE 0 # VBARSQ (-2) TO PDL0
035922,000777:
035923,000778: 26,2736 43205 DMP DAD
035924,000779: 26,2737 15014 KR1
035925,000780: # GAM, POS DOWN, FROM PDL2
035926,000781: 26,2740 41215 DAD DMP
035927,000782: 26,2741 15016 -6.05DEG
035928,000783: 26,2742 15020 KR2
035929,000784: 26,2743 77725 PDDL # XCH PDL+0 FOR VBARSQ (-2)
035930,000785: 26,2744 43271 DDV DAD
035931,000786: 26,2745 15030 KR4
035932,000787: 26,2746 31771 DP2(-4)
035933,000788: 26,2747 77665 BDDV
035934,000789: # NUM FROM PDL+0
035935,000790: 26,2750 51015 DAD BPL
035936,000791: 26,2751 15022 KR3
|
|
Page 814
|
035938,000793: 26,2752 54755 +3
035939,000794: 26,2753 77745 DLOAD
035940,000795: 26,2754 15336 HI6ZEROS
035941,000796: 26,2755 17722 STODL GMAX # 100 GMAX (-14)
035942,000797:
035943,000798: # DISPLAY USES GMAX AS SP, SO LO WORD IS WRITTEN OVER BY VPRED.
035944,000799:
035945,000800: 26,2756 02240 ERADM # = FISCHER RADIUS (-29) M
035946,000801: 26,2757 45015 DAD CALL # 2 ND ITERATION FOR FISCHER RADIUS
035947,000802: 26,2760 15026 400KFT
035948,000803: 26,2761 57261 CALCTFF # ESTABLISH TRANSFER ANGLE DATA.
035949,000804: 26,2762 77624 CALL
035950,000805: 26,2763 57052 TFF/TRIG # GET SIN, COS DELF
035951,000806: 26,2764 77624 CALL
035952,000807: 26,2765 55033 FISHCALC # GET CORRESPONDING FISCHER RADIUS.
035953,000808:
035954,000809: 26,2766 73015 DAD LXA,2 # SAVE HI-WORD FOR DOWNLIST.
035955,000810: 26,2767 15026 400KFT # M (-29)
035956,000811: 26,2770 03713 RTGO # (RANGE ANGLE FROM EMSALT)/360
035957,000812: 26,2771 34023 STCALL RTERM
035958,000813: 26,2772 55051 PREVGAM # VGAMCALC WITH NEW RTERM
035959,000814:
035960,000815: 26,2773 67076 DCOMP SXA,2 # HI-WORD OF EACH ON DOWNLIST.
035961,000816: 26,2774 00155 MPAC +1
035962,000817: 26,2775 17761 STODL GAMMAEI # CONIC GAMMA/360 AT 400K FT. ( HI-WORD)
035963,000818: # CONIC RTGO/360 FROM EMSALT (LOW-WORD)
035964,000819: # FOR TM, DP(GAMMAEI) = (GAMMA, RTGO)/360
035965,000820:
035966,000821: # VGAM FROM PDL+0 (-7)
035967,000822: 26,2776 77626 STADR
035968,000823: 26,2777 74020 STORE VPRED # CONIC VELOCITY AT 400K FT
035969,000824:
035970,000825: 26,3000 77634 RTB
035971,000826: 26,3001 54304 P61.1
035972,000827: # PDL BACK TO ZERO.
035973,000828:
035974,000829: 26,3002 52145 LUNENT DLOAD GOTO
035975,000830: 26,3003 06452 1/RTMUE # ESTABLISH MU FOR LUNAR TYPE ENTRIES
035976,000831: 26,3004 54660 CALLCON
035977,000832: 26,3005 00002 26244 290KFT 2DEC 88392.0 B-29
035978,000833: 26,3007 33335 05707 36KFT/S 2DEC 109.728 B-7 # (-7) M/CS = 36 KFT/S (-7)
035979,000834: 26,3011 36365 30244 20KFT/S 2DEC 121.92 B-7 # (-6) M/CS = 2 20KFT/S (-7)
035980,000835: 26,3013 77113 42770 KR1 2DEC -.026666667 # = -2.4 4 / 360
035981,000836: 26,3015 77354 65030 -6.05DEG 2DEC -.016805556 # = -6.05 / 360
035982,000837: 26,3017 21450 00001 KR2 2DEC .54931641 # = (360/4) 100 (-14) = 9000 B-14
|
|
Page 815
|
035984,000839: 26,3021 01750 00000 KR3 2DEC 1000 B-14 # = 100 (10.0) (-14) G,S
035985,000840: # ASSUMES L/D = 0.3, BANK =0.
035986,000841: 26,3023 00305 04541 RTRIAL 2DEC 6460097.18 B-29 # RPAD +284643 FT =21 194 545 FT
035987,000842: # RPAD DEFINED AS 20 909 901.57 FT =6 373 338 M
035988,000843: 26,3025 00003 27040 400KFT 2DEC 121920 B-29 # METERS
035989,000844:
035990,000845: # 300KFT 2DEC 91440 B-29 (-29) M
035991,000846:
035992,000847: # EMSALT 2DEC 86759.2 B-29 284643 FT (-29) M (ORBITAL REENTRY)
035993,000848:
035994,000849: # EMSALT 2DEC 90657 B-29 297431 FT (-29) M (LUNAR REENTRY)
035995,000850:
035996,000851: 26,3027 32525 12525 KR4 2DEC .833333333
035997,000852: 26,3031 23,2455 300KFT EQUALS MINPERE
035998,000853: 26,3031 77777 76601 VEMSCON 2DEC -.0389676 B-14 # = -HS D / 2 PI (-14) M SQ / CS SQ
035999,000854: # =- 16369 .05G 32.2 .3048 .3048/2 PI (-14)
036000,000855:
|
|
Page 816
|
036002,000857: # SUBROUTINE NAME: FISHCALC (USED BY S61.2) DATE: 01.21.67
036003,000858: # MOD NO: 0 LOG SECTION: P61-P67
036004,000859: # MOD BY: MORTH / BAIRNSFATHER
036005,000860: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 MAY 67 INCLUDE GETERAD CALL
036006,000861: # FUNCTIONAL DESCRIPTION: GIVEN THE PRESENT POSITION, UNITR, CALCULATE A NEW UNITR THAT IS ROTATED THROUGH
036007,000862: # TRANSFER ANGLE, THETA, ALONG TRAJECTORY. THEN CALCULATE SIN(LAT) AND USE TO OBTAIN FISCHER RADIUS.
036008,000863:
036009,000864: # SINCE FISHCALC USES UNI (LEFT BY ENTRY) EARTH SCALING IS ASSUMED. (WILL IMPROVE FOR SUITABLE TENNANT)
036010,000865:
036011,000866: # CALLING SEQUENCE: CALL
036012,000867: # FISHCALC
036013,000868: # ENTER WITH .5 SIN(THETA) IN MPAC.
036014,000869: # PUSHLOC IS AT PDL+0, AN ARBITRARY BASE VALUE IF LEQ 8D
036015,000870:
036016,000871: # SUBROUTINES CALLED: GET ERAD
036017,000872: # NORMAL EXIT MODE: RVQ
036018,000873: # EXIT MODES: NONE
036019,000874: # OUTPUT: ERADM (-29) M IN MPAC ON RETURNING
036020,000875: # NEW UNIT VECTOR NOT SAVED.
036021,000876: # SIN(LAT) NOT SAVED.
036022,000877: # PUSHLOC AT PDL+0
036023,000878:
036024,000879: # ERASEABLE INITIALIZATION REQUIRED:
036025,000880: # SDELF/2 =SIN(THETA) /2, IN MPAC LEFT BY TFF/TRIG
036026,000881: # CDELF/2 =COS(THETA) /2, STORED IN PDL 14D LEFT BY TFF/TRIG
036027,000882: # RONE (-29) M LEFT BY USER
036028,000883: # VONE (-7) M/CS LEFT BY USER
036029,000884: # URONE UR/2 LEFT BY USER
036030,000885: # UNI .5 UNIT(V*R) LEFT BY ENTRY / P61
036031,000886: # UNITW UNIT NORTH POLE LEFT BY PAD LOAD
036032,000887: # DEBRIS: QPRET, PDL+0 ... PDL+5
036033,000888:
036034,000889: # - - -
036035,000890: 26,3033 47315 FISHCALC PDVL VXV # URPR = UR CDELF + UHOR SDELF
036036,000891: 26,3034 02334 URONE
036037,000892: 26,3035 03502 UNI
036038,000893: 26,3036 76561 VXSC VSL1
036039,000894: # SIN(THETA) / 2 FROM PDL+0
036040,000895: 26,3037 74315 PDVL VXSC # TO PDL+0, +5
036041,000896: 26,3040 02334 URONE
036042,000897: 26,3041 00017 CDELF/2 # COS(THETA) /2
036043,000898: 26,3042 45455 VAD STADR
036044,000899: 26,3043 74235 STORE URH # FOR USE IN RTGO FROM EMS DISPLAY
036045,000900: 26,3044 72441 DOT SL1
036046,000901: 26,3045 01712 UNITW # FULL UNIT VECTOR UNIT NORTH
036047,000902: 26,3046 02156 STORE ALPHAV +4 # = .5 SIN(LAT)
036048,000903: 26,3047 77650 DUMPFISH GOTO
036049,000904: 26,3050 26570 GETERAD # SAVES FISCHER RAD (-29) M IN ERADM AND
036050,000905: # IN MPAC. RETURNS TO CALLER VIQ QPRET.
036051,000906:
|
|
Page 817
|
036053,000908: # SUBROUTINE NAME: VGAMCALC (USED BY S61.2) DATE: 01.21.67
036054,000909: # MOD NO: 0 LOG SECTION: P61-P67
036055,000910: # MOD BY: MORTH / BAIRNSFATHER
036056,000911: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67
036057,000912: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 21 NOV 67 VARIABLE MU ADDED.
036058,000913: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 68 ACCEPT DIFFERENT EARTH/MOON SCALE
036059,000914: # FUNCTIONAL DESCRIPTION: EARTH CENTERED VIS VIVA CALCULATION OF TERMINAL VELOCITY AND GAMMA (REL TO
036060,000915: # HORIZONTAL) GIVEN THE SCALAR QUANTITIES: PRESENT RADIUS AND VELOCITY AND THE TERMINAL RADIUS.
036061,000916: # THE USER MUST APPEND PROPER SIGN TO GAMMA, SINCE IT IS CALCULATED AS A POSITIVE NUMBER.
036062,000917: # THE EQUATIONS ARE
036063,000918:
036064,000919: # VGAM = SQRT(VN VN/MU + 2(RN-RTERM)/(RN RTERM) ) RTMU
036065,000920:
036066,000921: # COSGAM = H /RTERM VGAM = SQRT(LCP)/ (RTERM VGAM/RTMU)
036067,000922:
036068,000923: # VGAMCALC ASSUMES THAT THE TERMINAL RADIUS IS LESS THAN THE PRESENT RADIUS. BOTH CALCTFF AND CALCTPER
036069,000924: # MAKE THIS ASSUMPTION.
036070,000925:
036071,000926: # CALLING SEQUENCE: CALL STCALL RTERM
036072,000927: # VGAMCALC PREVGAM
036073,000928: # PUSHLOC AT PDL+0, ARBITRARY IF LEQ 12D
036074,000929: # C(MPAC) UNSPECIFIED C(MPAC)=NEW RTERM
036075,000930:
036076,000931: # SUBROUTINES CALLED: NONE
036077,000932: # NORMAL EXIT MODE: RVQ
036078,000933: # ALARMS: NONE
036079,000934: # OUTPUT: GAMMA / 360 IN MPAC, POSITIVE NUMBER
036080,000935: # VGAM E:(-7) M:(-5) M/CS IN PDL+0
036081,000936: # PUSHLOC AT PDL+2
036082,000937: # ERASABLE INITIALIZATION REQD:
036083,000938: # TFF/RTMU E:(17) M:(14) 1/SQRT(MU) LEFT BY TFFCONIC.
036084,000939: # RMAG1 E:(-29) M:(-27) M PRESENT RADIUS LENGTH LEFT BY TFFCONIC
036085,000940: # NRMAG E:(-29+NR) M NORM LENGTH OF PRESENT POSITION LEFT BY TFFCONIC
036086,000941: # M:(-27+NR)
036087,000942: # RTERM E:(-29) M:(-27) M TERMINAL RADIUS LENGTH LEFT BY CALCTFF
036088,000943: # NRTERM E:(-29+NR) M NORM LENGTH OF TERMINAL RADIUS LEFT BY CALCTFF
036089,000944: # M:(-27+NR)
036090,000945: # TFFVSQ E:(20) M:(18) 1/M -(V SQ/MU): PRESENT VELOCITY, NORM LEFT BY TFFCONIC
036091,000946: # TFFNP E:(-38+2NR) M LCP, SEMI-LATUS RECTUM, WEIGHT NR LEFT BY TFFCONIC
036092,000947: # M:(-36+2NR)
036093,000948: # DEBRIS: QPRET, PDL+0 ... PDL+3
036094,000949: # RTERM, NRTERM IF PREVGAM ENTERED.
|
|
Page 818
|
036096,000951:
036097,000952: 26,3051 77657 PREVGAM SL* # ENTER WITH NEW RTERM IN MPAC
036098,000953: # E: (-29) M: (-27)
036099,000954: 26,3052 20201 0,1 # X1 = -NR
036100,000955: 26,3053 00021 STORE NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
036101,000956:
036102,000957: 26,3054 41345 VGAMCALC DLOAD DMP
036103,000958: 26,3055 00041 NRMAG # RMAG M E: (-29+NR) M: (-27+NR)
036104,000959: 26,3056 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
036105,000960: 26,3057 45325 PDDL DSU # RMAG RTERM M E: (-58+2NR) M: (-54+2NR)
036106,000961: 26,3060 00041 NRMAG # RMAG M E: (-29+NR) M: (-27+NR)
036107,000962: 26,3061 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
036108,000963: 26,3062 56257 SL* DDV # 2(RN-RTERM) E: (-30+NR) M: (-28+NR)
036109,000964: 26,3063 20171 0 -8D,1 # (-8+NR)
036110,000965: # PUSH UP PRODUCT.
036111,000966: 26,3064 77625 DSU
036112,000967: 26,3065 00025 TFFVSQ # -(V SQ/MU) E: (20) M: (18)
036113,000968: 26,3066 41566 SQRT PUSH # SAVE VGAM/RT(MU) FOR NOW. E: (10) M: (9)
036114,000969: 26,3067 65271 DDV PDDL # XCH PDL+0, LEAVING VGAM FOR OUTPUT.
036115,000970: # VGAM TO PDL M/CS E: (-7) M: (-2)
036116,000971: 26,3070 00037 TFF/RTMU # E: (17) M: (14)
036117,000972: 26,3071 65205 DMP PDDL # RTERM VGAM/RTMU E: (-19+NR) M: (-18+NR)
036118,000973: 26,3072 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
036119,000974: 26,3073 00035 TFFNP # LC P =H.H/MU M E: (-38+2NR) M: (-36+2NR)
036120,000975: 26,3074 56366 SQRT DDV # E: (-19+NR) M: (-18+NR)
036121,000976: # PUSH UP DEN E: (-19+NR) M: (-18+NR)
036122,000977: # USE DDV OVFL AS LIMITER (|COS| <1.0)
036123,000978: 26,3075 65542 SR1 ACOS
036124,000979: 26,3076 77616 DUMPVGAM RVQ
036125,000980: # CALLER MUST SUPPLY OWN SIGN ...
036126,000981: # 22W 27MS
036127,000982:
|
|
Page 819
|
036129,000984: # SUBROUTINE NAME: TFF/TRIG (USED BY S61.2) DATE 01.17.67
036130,000985: # MOD NO: 0 LOG SECTION: P61-P67
036131,000986: # MOD BY: RR BAIRNSFATHER
036132,000987: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 14 APR 67
036133,000988: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 68 ACCEPT DIFFERENT EARTH/MOON SCALE
036134,000989: # FUNCTIONAL DESCRIPTION: USED BY ENTRY DISPLAY TO CALCULATE SIN(THETA), COS(THETA) FROM DATA LEFT IN
036135,000990: # PDL BY TFF SUBROUTINES. THE EQNS ARE
036136,000991:
036137,000992: # COS(THETA) = 1-2 ABS(ARG) / (RN RTERM (1+X) )
036138,000993: # 2
036139,000994: # SIN(THETA) = SGN(ARG) SQRT(1-COS (THETA) )
036140,000995:
036141,000996: # WHERE THETA = TRANSFER ANGLE
036142,000997: # AND ARG = P Z ABS(Z) IF ALFA ZZ LEQ 1
036143,000998: # ARG = (P / ALFA) SGN(Q1 + R 1/Z) IF ALFA Z Z G 1
036144,000999: # AND ARG HAS BEEN AFFIXED WITH THE SIGN OF SIN(THETA).
036145,001000: # CALLING SEQUENCE: CALL
036146,001001: # TFF/TRIG
036147,001002: # PUSHLOC AT PDL+0, ARBITRARY IF NOT EQ 14D
036148,001003: # C(MPAC) UNSPECIFIED
036149,001004:
036150,001005: # SUBROUTINES CALLED: NONE
036151,001006: # NORMAL EXIT MODES: RVQ
036152,001007: # ALARMS: NONE
036153,001008: # OUTPUT: C(MPAC) = .5 SIN(THETA)
036154,001009: # CDELF/2 = .5 COS(THETA) (IN PDL 14D)
036155,001010: # PUSHLOC AT PDL+0
036156,001011: # ERASABLE INITIALIZATION REQUIRED:
036157,001012: # TFFX X LEFT BY CALCTFF OR CALCTPER
036158,001013: # TFFTEM E: (-59+2NR) ARG LEFT BY CALCTFF OR CALCTPER
036159,001014: # M: (-55+2NR) WHERE ARG = LCP ZZ SGN(DELF) OR ARG = LCP/ALFA SGN(DELF)
036160,001015: # NRTERM E: (-29+NR) M NORM LENGTH OF TERMINAL RADIUS LEFT BY CALCTFF OR CALCTPER
036161,001016: # M: (-27+NR)
036162,001017: # NRMAG E: (-29+NR) M NORM LENGTH OF PRESENT POSITION LEFT BY TFFCONIC
036163,001018: # M: (-27+NR)
036164,001019: # DEBRIS: QPRET, CDELF/2
036165,001020:
036166,001021: 27,2000 SETLOC P60S5
036167,001022: 27,2000 BANK
036168,001023: 27,3052 COUNT* $$/S61.2
036169,001024: 27,3052 70545 TFF/TRIG DLOAD SR1
036170,001025: 27,3053 00043 TFFX
036171,001026: 27,3054 41215 DAD DMP
036172,001027: 27,3055 15334 HIDPHALF
036173,001028: 27,3056 00041 NRMAG # RMAG M E: (-29+NR) M: (-27+NR)
036174,001029: 27,3057 55205 DMP BDDV
036175,001030: 27,3060 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
036176,001031: 27,3061 00045 TFFTEM # P ZSQ OR P/ALFA E: (-59+2NR) M: (-55+2NR)
036177,001032: 27,3062 44246 ABS BDSU # THE SIGN IS FOR SDELF.
036178,001033: 27,3063 15334 HIDPHALF
036179,001034: 27,3064 00017 STORE CDELF/2 # .5 COS(THETA)
036180,001035: 27,3065 57516 DSQ DCOMP # KEEP HONEST FOR SQRT.
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|
Page 820
|
036182,001037: 27,3066 75415 DAD SQRT
036183,001038: 27,3067 15326 HIDP1/4
036184,001039: 27,3070 43565 DUMPTRIG SIGN RVQ
036185,001040: 27,3071 00045 TFFTEM # AFFIX SIGN(DELE/2)
036186,001041: # RETURN WITH .5 SIN(THETA) IN MPAC
036187,001042:
036188,001043: 04,2000 SETLOC P60S6
036189,001044: 04,2000 BANK
036190,001045:
036191,001046: 04,3731 COUNT* $$/S61.1
036192,001047: # 16W 15MS
036193,001048:
036194,001049: 04,3731 77620 DISPTARG STQ # C(MPAC) = TRGO ESTIMATE
036195,001050: 04,3732 03373 60GENRET
036196,001051: 04,3733 43205 DMP DAD # (TTE1 IS POSITIVE)
036197,001052: 04,3734 11752 KTETA1
036198,001053: 04,3735 03733 TTE1
036199,001054: 04,3736 37606 STCALL DTEAROT
036200,001055: 04,3737 46223 EARROT2
036201,001056: 04,3740 77624 CALL
036202,001057: 04,3741 11744 VRCALC
036203,001058: 04,3742 77650 GOTO
036204,001059: 04,3743 03373 60GENRET
036205,001060: 04,3744 50375 VRCALC VLOAD DOT
036206,001061: 04,3745 03542 URH
036207,001062: 04,3746 03474 RT
036208,001063: 04,3747 65512 SL2 ACOS
036209,001064: 04,3750 77616 RVQ
036210,001065: 04,3751 00052 05716 KTETA1 2DEC .421844723 E2 B-14* # 1100 2PI/16384(163.84)
036211,001066: # END OF PROGRAM S61.2
036212,001067:
|
|
Page 821
|
036214,001069: # PROGRAM DESCRIPTION S62.3 DATE 10JAN67
036215,001070: # MOD NO 1 LOG SECTION P60-P67
036216,001071: # MOD BY ZELDIN
036217,001072: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 15 MAY 67 CHANGED TO REF COORDS.
036218,001073: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 ALFAPAD CHANGES MADE.
036219,001074: # FUNCTIONAL DESCRIPTION
036220,001075: # COMPUTE DESIRED GIMBOL ANGLES FOR ENTRY ATTITUDE
036221,001076: # THE FOLLOWING TRAJECTORY TRIAD IS AVAILABLE IN MEMORY AND IS COMPUTED EACH 2 SECONDS BY CM/POSE IN
036222,001077: # REFERENCE COORDINATES (V = VELOCITY RELATIVE TO EARTH) :
036223,001078:
036224,001079: # UXA = -UNIT(V)
036225,001080: # UYA = UNIT(V*R)
036226,001081: # UZA = UXA*UYA
036227,001082:
036228,001083: # GENERATE A DESIRED BODY TRIAD FOR TRIMMED FLIGHT WITH RESPECT TO THE RELATIVE VELOCITY VECTOR, USING
036229,001084: # ROLL COMMAND AND TRIM ANGLE OF ATTACK:
036230,001085:
036231,001086: # UXD = UNIT(UYD*UXA) SIN(ALFATRIM) + UXA COS(ALFATRIM)
036232,001087: # UYD = UYA COS(ROLLC) + UZA SIN(ROLLC)
036233,001088: # UZD = UXD * UYD
036234,001089:
036235,001090: # USE THE DESIRED SET (IN REFERENCE COORDS) AND REFSMMAT TO CALL CALCGA AND OBTAIN GIMBAL ANGLES
036236,001091: # IN 2S,C IN MPAC, +2 AND THETAD, +2.
036237,001092:
036238,001093: # CALLING SEQUENCE
036239,001094: # L CALL
036240,001095: # L+1 S62.3
036241,001096: # NORMAL EXIT MODE
036242,001097: # RETURN VIA QPRET DIRECTLY FROM CALCGA.
036243,001098: # SUBROUTINES CALLED
036244,001099: # CALCGA
036245,001100: # ALARM OR ABORT MODES
036246,001101: # NONE
036247,001102: # ERASABLE INITIALIZATION REQUIRED
036248,001103: # ROLLC ROLL COMMAND DP 1:S COMP AT 1REV
036249,001104: # ALFAPAD SP 1S,C /180 LEFT BY PAD LOAD ALFATRIM IS NEGATIVE.
036250,001105: # UXA/2 REF COORDS LEFT BY CM/POSE
036251,001106: # UYA/2 REF COORDS LEFT BY CM/POSE
036252,001107: # UZA/2 REF COORDS LEFT BY CM/POSE
036253,001108: # OUTPUT
036254,001109: # CPHI GIMBAL ANGLES (O,I,M) 2:S COMP TP (O,I,M)/180
036255,001110: # DEBRIS
036256,001111: # QTEMP, QPRET, PUSHLIST
036257,001112:
036258,001113: 10,2000 SETLOC P60S4
036259,001114: 10,2000 BANK
036260,001115:
036261,001116: 10,2412 COUNT* $$/S62.3
036262,001117:
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036264,001119: 10,2412 67201 S62.3 SETPD SLOAD
036265,001120: 10,2413 00001 0
036266,001121: 10,2414 03012 ALFAPAD # ALFATRIM /180, ALFA IS NEG.
036267,001122: 10,2415 41542 SR1 PUSH
036268,001123: 10,2416 65346 COS PDDL # XCH PDL, COS TO PDL0
036269,001124: 10,2417 65356 SIN PDDL # SIN TO PDL2
036270,001125: 10,2420 03316 ROLLC
036271,001126: 10,2421 74346 COS VXSC
036272,001127: 10,2422 03550 UYA/2 # REF COORDS
036273,001128: 10,2423 73525 PDDL SIN # PUSH VECTOR INTO PDL4,.9
036274,001129: 10,2424 03316 ROLLC
036275,001130: 10,2425 53361 VXSC VAD
036276,001131: 10,2426 03556 UZA/2 # REF COORDS
036277,001132: # VECTOR FROM PDL4, 9
036278,001133: 10,2427 77772 VSL1
036279,001134: 10,2430 02722 STORE YNB # = UYD REF COORDS
036280,001135:
036281,001136: 10,2431 76435 VXV VSL1
036282,001137: 10,2432 03542 UXA/2 # REF COORDS
036283,001138: 10,2433 65361 VXSC PDDL
036284,001139: # SIN TRIM FROM PDL2
036285,001140: # XCH PDL0 FOR COS TRIM
036286,001141: 10,2434 53361 VXSC VAD
036287,001142: 10,2435 03542 UXA/2 # REF COORDS
036288,001143: # FROM PDL0
036289,001144: 10,2436 77772 VSL1
036290,001145: 10,2437 02714 STORE XNB # X SC AXIS (.5 UNIT) REF COORDS
036291,001146:
036292,001147: 10,2440 76435 VXV VSL1
036293,001148: 10,2441 02722 YNB
036294,001149: 10,2442 26730 STOVL ZNB # Z SC IN REF COOR. SCALED AT 2
036295,001150: 10,2443 01734 REFSMMAT
036296,001151: 10,2444 26672 STOVL XSM
036297,001152: 10,2445 01742 REFSMMAT +6
036298,001153: 10,2446 26700 STOVL YSM
036299,001154: 10,2447 01750 REFSMMAT +12D
036300,001155: 10,2450 02706 STORE ZSM
036301,001156:
036302,001157: 10,2451 77650 GOTO
036303,001158: 10,2452 47344 CALCGA
036304,001159: # CALCGA WILL RETURN TO ORIGINAL CALLER
036305,001160: # VIA QPRET WITH 2,S COMP. ANGLES IN CPHI
End of include-file P61-P67.agc. Parent file is MAIN.agc