Source Code
|
These source-code files are part of a reconstructed copy of Comanche 44, the
initial release (though not the final mission release) of the Apollo 10
Command Module (CM) Apollo Guidance Computer (AGC) software. Subsequent releases
were Comanche 45 and Comanche 45/2 (the flown release on Apollo 10). The reconstruction
is believed to be exactly accurate, but in the absence of an actual Apollo-era
listing of Comanche 44, some explanation of the reconstruction process is needed
to insure confidence in that accuracy.
The starting point was the source code of Comanche 51
(separately previously reconstructed from an Apollo-era listing of Comanche 55,
flown on Apollo 11). Comanche 51 source code was then modified
by undoing changes known to have been made between revisions 44 and 51. The now-reconstructed
Comanche 44 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 match those on the Comanche 55 printout,
although the source code would likely have different page numbers in a contemporary
Comanche 44 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 51. Here's a guide to the Apollo documentation referenced
in those annotations:
In most cases, only the titles (rather than the full texts) of PCRs are known. In addition to the
explanatory annotations, there is also
a step-by-step 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.
|
034986,000002: ## Copyright: Public domain.
034987,000003: ## Filename: P61-P67.agc
034988,000004: ## Purpose: A section of Comanche revision 044.
034989,000005: ## It is part of the reconstructed source code for the
034990,000006: ## original release of the flight software for the Command
034991,000007: ## Module's (CM) Apollo Guidance Computer (AGC) for Apollo 10.
034992,000008: ## The code has been recreated from a copy of Comanche 055. It
034993,000009: ## has been adapted such that the resulting bugger words
034994,000010: ## exactly match those specified for Comanche 44 in NASA drawing
034995,000011: ## 2021153D, which gives relatively high confidence that the
034996,000012: ## reconstruction is correct.
034997,000013: ## Assembler: yaYUL
034998,000014: ## Contact: Ron Burkey <info@sandroid.org>.
034999,000015: ## Website: www.ibiblio.org/apollo/index.html
035000,000016: ## Mod history: 2020-12-03 MAS Created from Comanche 51.
035001,000017: ## 2020-12-12 RSB Added justifying annotations for Mike's
035002,000018: ## reconstruction steps.
035003,000019:
|
|
Page 789
|
035005,000021: # PROGRAM: P61
035006,000022: # MOD NO.: 0 MAR. 13, 1967
035007,000023: # MOD BY: R. HIRSCHKOP
035008,000024: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 22 JUN 67 RESTARTS.
035009,000025: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP CHANGES.
035010,000026: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 8 MAY 68 DELETE CMSM MANEUVER (PCR 50)
035011,000027: # FUNCTION: TO CALCULATE AND DISPLAY EMS INITIALIZATION DATA
035012,000028: # CALLING SEQUENCE- BY V37
035013,000029: # EXIT- TO P62
035014,000030: # SUBROUTINE CALLS- S61.1, S61.3, GOFLASH, FLAGUP, R02BOTH
035015,000031: # ERASABLE INITIALIZATION:
035016,000032: # EMSALT (-29) M .05G ALTITUDE ABOVE FISCHER ELLIPSOID PAD LOADED.
035017,000033: # ALFAPAD /180 HYPERSONIC CM TRIM ANGLE OF ATTACK PAD LOADED
035018,000034: # OUTPUT: THE FOLLOWING REGISTERS ARE WRITTEN IN FOR USE BY DISPLAYS
035019,000035: # GMAX 100 GMAX (-14) G,S MAXIMUM ACCELERATION
035020,000036: # VPRED (-7) M/CS PREDICTED VELOCITY AT 400K FT
035021,000037: # GAMMAEI GAMMA/360 PREDICTED GAMMA AT 400K FT
035022,000038: # RTGO THETAH/360 RANGE ANGLE TO SPLASH FROM EMSALT EMSALT IS PAD LOADED
035023,000039: # VIO (-7) M/CS INERTIAL VELOCITY AT EMSALT EMSALT IS PAD LOADED
035024,000040: # TTE (-28) CS TIME TO EMSALT EMSALT IS PAD LOADED
035025,000041: # LAT(SPL) /360 TARGET LOCATION LEFT BY DSKY
035026,000042: # LNG(SPL) /360 TARGET LOCATION LEFT BY DSKY
035027,000043: # HEADSUP (0) +1 = LIFT DOWN, -1 = LIFT UP LEFT BY DSKY
035028,000044: # DEBRIS: SEE SUBROUTINES.
035029,000045:
035030,000046: 26,2217 BANK 26
035031,000047: 26,2000 SETLOC P60S
035032,000048: 26,2000 BANK
035033,000049:
035034,000050: 26,2217 E6,1661 EBANK= AOG
035035,000051:
035036,000052: 26,2217 COUNT* $$/P61
035037,000053:
035038,000054: 26,2217 35002 P61 CA BIT14 # EXTENDED VERB SHOULD BE FREE THIS CLOSE
035039,000055: 26,2220 55044 TS EXTVBACT # TO V37
035040,000056: # LOCK OUT EXTENDED VERBS SO CAN USE TFF
035041,000057: # ROUTINES. EXT VERB ERASE IS USED
035042,000058:
035043,000059: 26,2221 45017 CS ONE # REMOVE IF HEADSUP EVER ON UPLINK DATA
035044,000060: 26,2222 55726 TS HEADSUP # PRELOAD
035045,000061:
035046,000062: 26,2223 02544 TC S61.1 # CHECK STATE VECTOR AND IMU ORIENTATION
035047,000063: # RV 60GENRET. DOES PHASCHNG, GROUP 4.
035048,000064:
035049,000065: 26,2224 32425 CA V06N61 # LAT(SPL) LNG(SPL) HEADSUP
035050,000066: # XXX.XX DEG XXX.XX DEG XXXXX.
035051,000067: 26,2225 04662 TC BANKCALL
035052,000068: 26,2226 21057 CADR GOFLASHR
035053,000069: 26,2227 04106 TC GOTOPOOH
|
|
Page 790
|
035055,000071: 26,2230 02235 TC P61.4
035056,000072: 26,2231 02224 TC -5
035057,000073:
035058,000074: 26,2232 05412 P61.3 TC PHASCHNG
035059,000075: 26,2233 00014 OCT 00014
035060,000076:
035061,000077: 26,2234 05217 TC ENDOFJOB
035062,000078:
035063,000079: 26,2235 22007 P61.4 ZL
035064,000080: 26,2236 11726 CCS HEADSUP # C(HEADSUP)= +1/-1
035065,000081: 26,2237 35002 CA BIT14 # IF HEADSUP POS,ROLLC =180 DEG.(LIFT DWN)
035066,000082: 26,2240 12241 NOOP # IF HEADSUP NEG,ROLLC =0 (LIFT UP)
035067,000083: 26,2241 53716 DXCH ROLLC # ROLLC IS USED BY S62.3: GIM ANG AT .05G
035068,000084:
035069,000085: 26,2242 06006 TC INTPRET
035070,000086: 26,2243 77745 NEWRNVN DLOAD
035071,000087: 26,2244 01205 PIPTIME # SAVE TIME OF RN,VN TO DETERMINE IF AN
035072,000088: 26,2245 37651 STCALL MM # UPDATE HAS OCCURRED
035073,000089: 26,2246 52063 STARTEN1 # INITIALIZE
035074,000090: 26,2247 77775 VLOAD
035075,000091: 26,2250 01171 RN
035076,000092: 26,2251 02327 STORE RONE
035077,000093: 26,2252 77656 UNIT
035078,000094: 26,2253 26343 STOVL URONE
035079,000095: 26,2254 01177 VN
035080,000096: 26,2255 02335 STORE VONE
035081,000097: 26,2256 53435 VXV UNIT
035082,000098: 26,2257 02343 URONE
035083,000099: 26,2260 03502 STORE UNI
035084,000100: 26,2261 45345 DUMPP61 DLOAD DSU
035085,000101: 26,2262 03651 MM # INITIAL VALUE OF PIPTIME
035086,000102: 26,2263 01205 PIPTIME
035087,000103: 26,2264 45040 BMN CALRB
035088,000104: 26,2265 54243 NEWRNVN # UPDATED... GO TRY AGAIN
035089,000105: 26,2266 54651 S61.2 # GET DISPLAY DATA FOR N60 AND N63
035090,000106: # AND RETURN IN BASIC, BELOW.
035091,000107: 26,2267 05536 P61.1 TC CLEARMRK
035092,000108: 26,2270 32424 CA V06N60 # GMAX VPRED GAMMAEI
035093,000109: # XXX.XX G XXXXX. FPS XXX.XX DEG
035094,000110: 26,2271 04662 TC BANKCALL
035095,000111: 26,2272 20720 CADR GOFLASH
035096,000112:
035097,000113: 26,2273 04106 TC GOTOPOOH
035098,000114: 26,2274 02276 TC P61.2 # PROCEED
035099,000115: 26,2275 02270 TC -5
035100,000116:
035101,000117: 26,2276 06006 P61.2 TC INTPRET # CORRECT TTE FOR TIME LAPSE DURING
035102,000118: # ABOVE DISPLAY.
035103,000119: 26,2277 45234 RTB DSU
035104,000120: 26,2300 45510 LOADTIME # CURRENT TIME.
|
|
Page 791
|
035106,000122: 26,2301 03651 MM # PIPTIME FOR RONE & VONE.
035107,000123: 26,2302 77615 DAD
035108,000124: 26,2303 03733 TTE1 # NEGATIVE OF FREE FALL TIME.
035109,000125: 26,2304 03727 STORE TTE # DECREMENTED
035110,000126:
035111,000127: 26,2305 77776 EXIT
035112,000128:
035113,000129: 26,2306 32426 CA V06N63 # RTGO VIO TTE
035114,000130: # XXXX.X NM XXXXX. FPS XXBXX M,S
035115,000131: 26,2307 04662 TC BANKCALL
035116,000132: 26,2310 20720 CADR GOFLASH
035117,000133: 26,2311 04106 TC GOTOPOOH
035118,000134: 26,2312 02314 TC +2
035119,000135: 26,2313 02276 TC P61.2 # REDO
035120,000136:
035121,000137: # .... THEN FALL INTO P62
|
|
Page 792
|
035123,000139:
035124,000140: # PROGRAM- P62
035125,000141: # MOD NO.- 0 MAR. 13, 1967
035126,000142: # MOD BY- R. HIRSCHKOP
035127,000143: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 67
035128,000144: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 22 JUN 67 RESTARTS.
035129,000145: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP CHANGES.
035130,000146: # MOD NO: 4 MOD BY: RR BAIRNSFATHER DATE: 8 MAY 68 MOVE START OF DESIRED GIMBAL CALC.
035131,000147: # FUNCTION- 1) TO NOTIFY CREW WHEN GNC SYSTEM IS PREPARED FOR CM/SM SEPARATION
035132,000148: # 2) TO ORIENT THE CM TO THE CORRECT ATTITUDE FOR ATMOSPHERIC ENTRY
035133,000149: # CALLING SEQUENCE- BY V37 OR DIRECTLY FROM P61
035134,000150: # EXIT- TO P63
035135,000151: # ERASABLE INITIALIZATION:
035136,000152: # ALFAPAD LEFT BY PAD LOAD
035137,000153: # LADPAD LEFT BY PAD LOAD
035138,000154: # LODPAD LEFT BY PAD LOAD
035139,000155: # LAT(SPL) (MAY BE CHANGED BELOW) LEFT BY DSKY, VIA P61
035140,000156: # LNG(SPL) (MAY BE CHANGED BELOW) LEFT BY DSKY, VIA P61
035141,000157: # HEADSUP (MAY BE CHANGED BELOW) LEFT BY DSKY, VIA P61
035142,000158: # SUBROUTINE CALLS: NEWMODEX, S61.1, CM/DAPIC, CM/DAPON, R02BOTH, GOPERF1, GOFLASH, GODSPR
035143,000159:
035144,000160: 26,2314 COUNT* $$/P62
035145,000161:
035146,000162: 26,2314 05354 TC NEWMODEX # MODE CHANGE IF CAME FROM P61.
035147,000163: 26,2315 00076 MM 62 B-14 # MODE CHANGE AUTOMATIC VIA V 37.
035148,000164: 26,2316 35017 CA ONE
035149,000165: 26,2317 54332 TS DNLSTCOD
035150,000166:
035151,000167: 26,2320 02544 P62 TC S61.1 # CHECK STATE VECTOR AND IMU ORIENTATION.
035152,000168:
035153,000169: 26,2321 06006 TC INTPRET
035154,000170: 26,2322 47131 SSP RTB
035155,000171: 26,2323 03325 POSEXIT
035156,000172: 26,2324 54401 P62.3 # CALCULATE DESIRED .05G GIMBAL ANGLES,
035157,000173: # WITHOUT DISPLAY.
035158,000174: 26,2325 41672 CM/DAPIC # START CM/POSE AND BODY RATE CALC
035159,000175:
035160,000176: # DOES 2PHSCHNG, OCT 40116, OCT 05024, OCT 13000.
035161,000177: # CM/DAPIC SETS EBANK = EBAOG
035162,000178: # AND RETURNS IN BASIC TO P62.2.
035163,000179: 26,2326 00006 P62.2 EXTEND
035164,000180: 26,2327 32432 DCA POSECADR # CONTINUE WITH CM/POSE AFTER AV G.
035165,000181: 26,2330 53223 DXCH AVEGEXIT
035166,000182:
035167,000183: 26,2331 34270 CAF OCT41 # REQUEST SEPARATION
035168,000184: 26,2332 04662 TC BANKCALL
035169,000185: 26,2333 21125 CADR GOPERF1R
035170,000186: 26,2334 04106 TC GOTOPOOH
035171,000187: 26,2335 02340 TC +3 # PROCEED
|
|
Page 793
|
035173,000189: # NOTE: NODOFLAG WILL BE SET IN CM/DAPON. <<<
035174,000190: 26,2336 02331 TC -5 # ENTER
035175,000191: 26,2337 02232 TC P61.3 # FOR PHASCHNG AND ENDOFJOB.
035176,000192:
035177,000193: 26,2340 04701 +3 TC POSTJUMP
035178,000194: 26,2341 41612 CADR CM/DAPON # DISABLE RCS DAP, ENABLE ENTRY DAP AND
035179,000195: # DO ATTITUDE HOLD.
035180,000196:
035181,000197: # WILL IDLE UNTIL CM/POSE DOES ONE UPDATE.
035182,000198: # CM/DAPON DOES NO PHASCHNG.
035183,000199:
035184,000200: 26,2342 32425 P62.1 CA V06N61 # LAT(SPL) LNG(SPL) HEADSUP
035185,000201: # XXX.XX DEG XXX.XX DEG 0000X.
035186,000202:
035187,000203: # TERMINATE ATTITUDE HOLD. SET UP COMMANDS:
035188,000204: # ROLLC, ALFACOM, BETACOM. BEGIN MANUVER TO
035189,000205: # ENTRY ATTITUDE.
035190,000206:
035191,000207: 26,2343 04662 TC BANKCALL
035192,000208: 26,2344 20720 CADR GOFLASH
035193,000209: 26,2345 02342 TC -3
035194,000210: 26,2346 02350 TC +2
035195,000211: 26,2347 02342 TC -5
035196,000212:
035197,000213: 26,2350 05412 TC PHASCHNG
035198,000214: 26,2351 04024 OCT 04024 # USE ENTRYVN FOR DISPLAY BELOW.
035199,000215: # EBANK WAS SET IN CM/DAPON TO EBAOG
035200,000216:
035201,000217: 26,2352 11726 CCS HEADSUP # C(HEADSUP) = +/- 1
035202,000218: 26,2353 35002 CA BIT14 # IF HEADSUP POS, ROLLC=180 DEG (LIFT DWN)
035203,000219: 26,2354 12355 NOOP # IF HEADSUP NEG, ROLLC=0 DEG (LIFT UP)
035204,000220: 26,2355 55715 TS ROLLC
035205,000221: 26,2356 31411 CA ALFAPAD # NOMINAL ALFATRIM PAD LOADED, NEG. NO.
035206,000222: 26,2357 22007 ZL
035207,000223: 26,2360 53604 DXCH ALFACOM # SET ALFACOM = ALFA TRIM, BETACOM=0
035208,000224:
035209,000225: 26,2361 35017 CA ONE # PERMITS EXDAP2 TO CHANGE FLAG TO +0
035210,000226: 26,2362 55727 TS P63FLAG # AS INDICATOR. STARTS UP P63.
035211,000227:
035212,000228: 26,2363 35052 CA V06N22 # SET UP DISPLAY FOR CDU DESIRED VALUES
035213,000229: 26,2364 55263 TS ENTRYVN # FROM ENTRY ATTITUDE CALC, THAT IS
035214,000230: # ALREADY GOING.
035215,000231: 26,2365 05546 TC UPFLAG # TURN ON ENTRY DISPLAY
035216,000232: 26,2366 00134 ADRES ENTRYDSP # ENTRYDSP = 92D BIT 13 FLAG 6
035217,000233: # SKIP
|
|
Page 794
|
035219,000235: 26,2367 41700 CS CMDAPMOD # GO DIRECTLY TO P63 IF BODY ATTITUDE
035220,000236: 26,2370 75017 MASK ONE # IS SUCH THAT THE DELAY TASK: WAKEP62
035221,000237: 26,2371 00006 EXTEND # WILL BE OMITTED.
035222,000238: 26,2372 12421 BZF P63.1 # DISABLE GRP 4, GO TO ENDOFJOB.
035223,000239: # (IE, CONTINUE IF CMDAPMOD = -1, OR +0)
035224,000240: 26,2373 02405 TC P63
035225,000241:
035226,000242: # PUT JOB TO SLEEP UNTIL VEHICLE MANUVER HAS
035227,000243: # REDUCED ALFA TO +/-45 DEG. CONSIDER REMAINING
035228,000244: # 65 DEG (25 DEG IF ALFA NEG) TO ALFA TRIM TO
035229,000245: # OCCUR AT 3 DEG/SEC, AND TERMINATE P62 AT THAT
035230,000246: # TIME.
035231,000247:
035232,000248: # TASK WAKEP62 IS CALLED FROM ENTRY DAP.
035233,000249: 26,2374 35065 WAKEP62 CA PRIO13
035234,000250: 26,2375 05134 TC NOVAC
035235,000251: 26,2376 E6,1661 EBANK= AOG
035236,000252: 26,2376 02405 54066 2CADR P63
035237,000253:
035238,000254: 26,2400 05324 TC TASKOVER
035239,000255:
035240,000256: # EACH 2 SEC, CALCULATE GIMBAL ANGLES FOR ENTRY CON-
035241,000257: # DITIONS THAT WILL HOLD IF REORIENTATION WERE MADE
035242,000258: # AT PRESENT RN, VN. COME HERE FROM CM/POSE AND ALSO
035243,000259: # IN KEPLER PHASE OF ENTRY.
035244,000260:
035245,000261: 26,2401 52131 P62.3 SSP GOTO # SET RETURN ADDRESS SO THAT ROUTINE
035246,000262: 26,2402 00053 QPRET # GOES DIRECTLY TO ENTRY GUIDANCE EXIT
035247,000263: 26,2403 53576 ENDEXIT # THAT DOES ENTRY DISPLAY, GRP 5.
035248,000264: 26,2404 20376 S62.3 # PUT DESIRED CDU VALUES IN CPHI'S FOR
035249,000265: # N22 DISPLAY.
035250,000266:
|
|
Page 795
|
035252,000268: # P63
035253,000269: # PROGRAM- P63
035254,000270: # MOD NO.- 0 MAR. 13, 1967
035255,000271: # MOD BY- R. HIRSCHKOP
035256,000272: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 22 JIN 67 RESTARTS.
035257,000273: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 14 JUL 67 REVISED RESTARTS
035258,000274: # FUNCTION- 1) TO INITIALIZE THE ENTRY EQUATIONS
035259,000275: # 2) TO CONTINUE TO HOLD THE CM TO THE CORRECT ATTITUDE WITH RESPECT TO THE ATMOSPHERE FOR
035260,000276: # THE ONSET OF ENTRY DECELERATION. ROLL ANGLE IS LIFT UP/DOWN AS SPECIFIED BY HEADSUP.
035261,000277: # 3) TO SENSE .05 G
035262,000278: # CALLING SEQUENCE- DIRECTLY FROM P62
035263,000279: # EXIT- TO ENDOFJOB
035264,000280: # SUBROUTINE CALLS- NEWMODEX, GODSPR
035265,000281:
035266,000282: 26,2405 COUNT* $$/P63
035267,000283:
035268,000284: 26,2405 05354 P63 TC NEWMODEX
035269,000285: 26,2406 00077 MM 63 B-14
035270,000286:
035271,000287: # ARRIVE WITH EBANK = AOG.
035272,000288:
035273,000289: 26,2407 32430 CA ENTCADR # CONTINUE AT STARTENT AFTER CM/POSE.
035274,000290:
035275,000291: # AT END OF STARTENT, CHANGE ADDRESS IN GOTOADDR
035276,000292: # TO CONTINUE AT SCALEPOP THEREAFTER.
035277,000293:
035278,000294: 26,2410 55724 TS POSEXIT
035279,000295:
035280,000296: 26,2411 32427 CA V06N64 # G VI R TO SPLSH
035281,000297: # XXX.XX G XXXXX. FPS XXXX.X NM
035282,000298: 26,2412 55263 TS ENTRYVN # FOR DISPLAY CALL IN OVERNOUT.
035283,000299:
035284,000300: 26,2413 45017 CS ONE # IN CASE FLAG IS LEFT AT +1 BY DAP. THE
035285,000301: 26,2414 55727 TS P63FLAG # -1 ASSURES THAT EXO-ATM DAP WILL NOT
035286,000302: # CALL P63 OUT OF SEQUENCE IN P66.
035287,000303:
035288,000304: 26,2415 05412 TC PHASCHNG # THIS IS REQUIRED TO PRESERVE CLEANDSP
035289,000305: 26,2416 00004 OCT 00004 # RETURN IN EVENT OF AN EXTENDED VERB..
035290,000306:
035291,000307: 26,2417 04662 TC BANKCALL # FLUSH 'N22' DISPLAY, IF ON. (OMIT
035292,000308: 26,2420 20703 CADR CLEANDSP # DISPLAY DURING 'STARTENT' PASS.)
035293,000309:
035294,000310: 26,2421 05412 P63.1 TC PHASCHNG
035295,000311: 26,2422 00004 OCT 00004 # DISABLE. DISPLAY RESTARTED VIA ENTRY.
035296,000312:
035297,000313: 26,2423 05217 TC ENDOFJOB
035298,000314:
035299,000315: 26,2424 01474 V06N60 VN 0660
035300,000316: 26,2425 01475 V06N61 VN 0661
035301,000317: 26,2426 01477 V06N63 VN 0663
|
|
Page 796
|
035303,000319: 26,2427 01500 V06N64 VN 0664
035304,000320: 26,2430 52000 ENTCADR CADR STARTENT
035305,000321:
035306,000322: 26,2431 E7,1451 EBANK= RTINIT # TO CARY OVER INTO ENTRY STEERING.
035307,000323: 26,2431 03467 76067 POSECADR 2CADR CM/POSE
035308,000324:
|
|
Page 797
|
035310,000326: # PROGRAM- P64
035311,000327: # MOD NO.- 1 SEPT. 19, 1967
035312,000328: # MOD BY- R. HIRSCHKOP
035313,000329: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 8 MAY 68 REVISED COMMENTS FOR COLOSSUS
|
|
Reconstruction: At this point, a comment from Comanche 51 has been removed
from Comanche 44, concerning work on NOUN 74. For various reasons, such as
Programmed Guidance Equations for COLOSSUS 2, p. NNDF-28, we know that
NOUN 74 had not yet been introduced in Comanche 44. The comment must therefore pertain to later
software revisions.
|
035320,000336: # FUNCTION- 1. TO START ENTRY GUIDANCE AT .05G SELECTING ROLL ATTITUDE, CONSTANT DRAG LEVEL, AND
035321,000337: # DRAG THRESHOLD, KA, WHICH ARE KEYED TO THE .05G POINT.
035322,000338: # 2. SELECT FINAL PHASE P67 IF V < 27000 FPS WHEN .2G OCCURS.
035323,000339: # 3. ITERATE FOR UP-CONTROL SOLUTION P65 IF V > 27000 FPS AND IF ALTITUDE RATE AND DRAG
035324,000340: # LEVEL CONDITIONS ARE SATISFIED. ENTER P65 WHEN CONSTANT DRAG CONTROLLER HAS BROUGHT RANGE
035325,000341: # AS PREDICTED TO WITHIN 25 NM OF DESIRED RANGE.
035326,000342: # 4. SELECT FINAL PHASE P67 IF NO UP-CONTROL SOLUTION EXISTS WITH VL > 18000 FPS.
035327,000343: # CALLING SEQUENCE- BY RTB FROM REENTRY CONTROL
035328,000344: # EXIT- BACK TO REENTRY CONTROL
035329,000345: # SUBROUTINE CALLS- NEWMODEX
035330,000346:
035331,000347: 25,2000 BANK 25
035332,000348: 26,2000 SETLOC P60S1
035333,000349: 26,2000 BANK
035334,000350:
035335,000351: # THIS DISPLAY IS CALLED EACH PASS THROUGH STEERING. RESTART PROTECTION IS VIA STEERING.
035336,000352:
035337,000353: 26,2433 COUNT* $$/P64
035338,000354:
035339,000355: 26,2433 05354 P64 TC NEWMODEX # ENTER VIA RTB WHEN .05G IS EXCEEDED.
035340,000356: 26,2434 00100 MM 64 B-14
|
|
Reconstruction: As explained in the preceding annotation, NOUN 74 (which
is referenced in the following instruction in Comanche 51) was not used in Comanche 44.
The following instruction is rolled back to Colossus 249 (Apollo 9), which used
NOUN 68 rather than 74.
|
035345,000361: 26,2435 32440 CA V06N68 # ROLLC VI HDOT
035346,000362: # XXX.XX DEG XXXXX. FPS XXXXX. FPS
035347,000363: 26,2436 55263 TS ENTRYVN # DISPLAY VIA OVERNOUT.
035348,000364:
035349,000365: 26,2437 06030 TC DANZIG # ... AND CONTINUE IN INITROLL ...
|
|
Reconstruction: Same as the preceding annotation.
|
035351,000367: 26,2440 01504 V06N68 VN 0668
035352,000368:
|
|
Page 798
|
035354,000370: # PROGRAM: P65
035355,000371: # MOD NO: 0 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP ADDITION.
035356,000372: # FUNCTION: TO CONTINUE ENTRY GUIDANCE, USING THE UP-CONTROL PHASE TO STEER TO A CONTROLLED EXIT
035357,000373: # CONDITION. THIS PHASE TERMINATES A) IF D < Q7 FPSS, GO TO P66 ,
035358,000374: # B) IF RDOT NEG, AND IF V < VL +500 FPS, GO TO P67.
035359,000375: # CALLING SEQUENCE: BY RTB FROM REENTRY CONTROL
035360,000376: # EXIT: BACK TO REENTRY CONTROL, OR TO ENDOFJOB.
035361,000377: # SUBROUTINE CALLS: NEWMODEX
035362,000378:
035363,000379: 26,2441 COUNT* $$/P65
035364,000380:
035365,000381: 26,2441 05354 P65 TC NEWMODEX # ENTER VIA RTB WHEN RANGE < 25 N M OF
035366,000382: 26,2442 00101 MM 65 B-14 # TARGET.
035367,000383:
035368,000384: 26,2443 35065 CA PRIO13
035369,000385: 26,2444 05134 TC NOVAC
035370,000386: 26,2445 1263 EBANK= ENTRYVN
035371,000387: 26,2445 02457 54062 2CADR P65.1
035372,000388:
035373,000389: 26,2447 05372 TC 2PHSCHNG # 2 PHASE CHG REQUIRED TO PREVENT RE-
035374,000390: 26,2450 00554 OCT 00554 # STARTING FLASHING DISPLAY TWICE.
035375,000391: 26,2451 10035 OCT 10035 # 4.55 SPOT AND SERVICER, HERE.
035376,000392: 26,2452 06006 TC INTPRET
035377,000393: 26,2453 47131 SSP RTB
035378,000394: 26,2454 03646 GOTOADDR # CHANGE ENTRY MODE TO UPCONTRL.
035379,000395: 26,2455 53035 UPCONTRL
035380,000396: 26,2456 52120 REFAZE10 # GO HERE TO REESTABLISH ENTRY SEQUENCER.
035381,000397: # AND CONTINUE AT UPCONTRL...
035382,000398:
035383,000399: 26,2457 05560 P65.1 TC DOWNFLAG
035384,000400: 26,2460 00134 ADRES ENTRYDSP # ENTRYDSP = 92D BIT 13 FLAG 6
035385,000401:
035386,000402: 26,2461 32473 CA V16N69 # ROLLC DL (Q7) VL
035387,000403: 26,2462 04662 TC BANKCALL # XXX.XX DEG XXX.XX G XXXXX. FPS
035388,000404: 26,2463 21057 CADR GOFLASHR
035389,000405: 26,2464 02461 TC -3 # NODOFLAG IS SET..
035390,000406: 26,2465 02470 TC +3
035391,000407: 26,2466 02461 TC -5
035392,000408: 26,2467 02232 TC P61.3 # EST. GRP 4 FOR DSPLAY AND DO ENDOFJOB
035393,000409: # IF PROCEED, CONTINUE.
035394,000410: 26,2470 05546 TC UPFLAG
035395,000411: 26,2471 00134 ADRES ENTRYDSP # ENTRYDSP = 92D BIT 13 FLAG 6
035396,000412:
035397,000413: 26,2472 02421 TC P63.1 # DISABLE GRP 4,START UP ENTRY DISPLAY
035398,000414: # N06V68 VIA OVERNOUT, AS USED IN P64.
035399,000415: 26,2473 04105 V16N69 VN 1669
035400,000416:
|
|
Page 799
|
035402,000418: # PROGRAM: P66
035403,000419: # MOD NO: 0 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 COLOSSUS GSOP ADDITIONS.
035404,000420: # FUNCTION: KEEP CM ATTITUDE IN TRIM TO THE RELATIVE VELOCITY VECTOR. ENTRY GUIDANCE STOPS GENERATING
035405,000421: # ROLL COMMANDS UNTIL DRAG BUILDS UP TO Q7+0.5 FPSS.
035406,000422: # CALLING SEQUENCE: VIA RTB FROM REENTRY CONTROL.
035407,000423: # EXIT: BACK TO REENTRY CONTROL.
035408,000424: # SUBROUTINE CALLS: NEWMODEX
035409,000425:
035410,000426: 26,2474 COUNT* $$/P66
035411,000427:
035412,000428: 26,2474 05354 P66 TC NEWMODEX # ENTER VIA RTB WHEN D < Q7 FPSS
035413,000429: 26,2475 00102 MM 66 B-14
035414,000430:
035415,000431: 26,2476 35052 CA V06N22 # OGA IGA MGA
035416,000432: # XXX.XX DEG XXX.XX DEG XXX.XX DEG
035417,000433: 26,2477 02503 TC P66END # IN CASE CAME FROM P65, GO DISABLE GRP4,
035418,000434: # AND SET ENTRYDSP TO DO DISPLAY VIA
035419,000435: # OVERNOUT.
035420,000436:
035421,000437: # ... AND CONTINUE AT KEP2
035422,000438:
|
|
Page 800
|
035424,000440: # P67
035425,000441:
035426,000442: # PROGRAM- P67
035427,000443: # MOD NO.- 0 MAR. 16, 1967
035428,000444: # MOD BY- R. HIRSCHKOP
035429,000445: # FUNCTION- TO TERMINATE STEERING WHEN THE CM VELOCITY WRT EARTH = 1000 FT/SEC
035430,000446: # CALLING SEQUENCE-
035431,000447: # EXIT- TO POOH
035432,000448: # SUBROUTINE CALLS- GOFLASH
035433,000449:
035434,000450: # THIS DISPLAY IS CALLED EACH PASS THROUGH STEERING. RESTART PROTECTION IS VIA STEERING.
035435,000451:
035436,000452: 26,2500 COUNT* $$/P67
035437,000453:
035438,000454: 26,2500 05354 P67 TC NEWMODEX # ENTER VIA RTB
035439,000455: 26,2501 00103 MM 67 B-14
035440,000456: 26,2502 32511 CA V06N66 # ROLLC XRNGERR DNRNGERR
035441,000457: # XXX.XX DEG XXXX.X NM XXXX.X NM
035442,000458: 26,2503 55263 P66END TS ENTRYVN # DISPLAY VIA OVERNOUT.
035443,000459:
035444,000460: 26,2504 05546 TC UPFLAG # (IN CASE CAME FROM P65. ENTRY DISPLAY
035445,000461: 26,2505 00134 ADRES ENTRYDSP # WILL FLUSH FLASHING DISP. IF STILL ON)
035446,000462: # BIT 13 FLAG 6
035447,000463: 26,2506 05412 KILLGRP4 TC PHASCHNG # DISABLE GRP4, IN CASE CAME FROM HUNTEST.
035448,000464: 26,2507 00004 OCT 00004 # (COME TO KILLGRP4 VIA RTB, RET TO CALLER)
035449,000465:
035450,000466: 26,2510 06030 TC DANZIG # ... AND CONTINUE AT PREDICT3 ...
035451,000467:
035452,000468: 26,2511 01502 V06N66 VN 0666
035453,000469:
035454,000470: 26,2512 BANK 26
035455,000471: 26,2000 SETLOC P60S2
035456,000472: 26,2000 BANK
035457,000473:
035458,000474: 26,2512 32543 P67.1 CA V16N67 # RTOGO LAT LONG
035459,000475: # XXXX.X NM XXX.XX DEG XXX.XX DEG
035460,000476: 26,2513 04662 TC BANKCALL
035461,000477: 26,2514 20720 CADR GOFLASH
035462,000478: 26,2515 02520 TC +3 # EFFECTIVE GOTOPOOH
035463,000479: 26,2516 02520 TC +2
035464,000480: 26,2517 02512 TC P67.1 # REDO
035465,000481:
035466,000482: 26,2520 46214 CS THREE # TURN OFF ENTRY DAP
035467,000483: 26,2521 00004 INHINT
035468,000484: 26,2522 70102 MASK CM/FLAGS # CM/DSTBY, GAMDIFSW
035469,000485: 26,2523 54102 TS CM/FLAGS
035470,000486: 26,2524 00003 RELINT
035471,000487: 26,2525 00006 EXTEND
035472,000488: 26,2526 32643 DCA SERVCAD2
035473,000489:
|
|
Page 801
|
035475,000491: 26,2527 53223 DXCH AVEGEXIT
035476,000492:
035477,000493: 26,2530 14106 TCF GOTOPOOH
035478,000494:
|
|
Page 802
|
035480,000496: 26,2531 43175 P67.2 VLOAD CLEAR # CALC PRESENT LAT, LONG, ALT.
035481,000497: 26,2532 01171 RN
035482,000498: 26,2533 00662 ERADFLAG # USE PAD RAD FOR ALT. (NOT SEEN ANYWAY)
035483,000499: 26,2534 16152 STODL ALPHAV
035484,000500: 26,2535 01205 PIPTIME # USE TIME OF RN
035485,000501: 26,2536 45014 CLEAR CALL
035486,000502: 26,2537 01663 LUNAFLAG
035487,000503: 26,2540 26370 LAT-LONG
035488,000504: 26,2541 77634 P67.3 RTB # ENTRY EXIT THAT OMITS DISPLAY.
035489,000505: 26,2542 53611 SERVNOUT
035490,000506:
035491,000507: 26,2543 04103 V16N67 VN 1667
035492,000508: 26,2544 4270 OCT41 = 33DEC
035493,000509: 26,2544 26,2642 SERVCAD2 = SERVCAD1
035494,000510:
|
|
Page 803
|
035496,000512: # SUBROUTINE NAME: S61.1
035497,000513: # MOD NO: 0 DATE: 21 FEB 67
035498,000514: # MOD BY: RR BAIRNSFATHER LOG SECTION: P61-P67
035499,000515: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 22 JUN 67 RESTARTS.
035500,000516:
035501,000517: # FUNCTIONAL DESCRIPTION: CALLED BY BOTH P61 AND P62
035502,000518: # FIRST, TEST TO SEE IF AVERAGEG IS ON. IF NOT, UPDATE THE STATE VECTOR TO PRESENT TIME + TOLERANCE
035503,000519: # AND TURN ON AVERAGEG AT THAT TIME, AND CONTINUE. OTHERWISE CONTINUE: SEE IF IMU Y AXIS IS
035504,000520: # WITHIN 30 DEG OF V*R. IF YES, EXIT SUBROUTINE S61.1. IF NO, SEE IF -Y AXIS OF IMU IS WITHIN
035505,000521: # 30 DEG OF V*R. IF YES, DISPLAY ALARM: 01427 IMU REVERSED.
035506,000522: # IF NO, DISPLAY ALARM: 01426 IMU UNSATISFACTORY.
035507,000523: # IN EITHER OF THESE LAST 2 CASES, WAIT 10 SEC AND THEN EXIT SUBROUTINE S61.1.
035508,000524:
035509,000525: # REMARK: THERE WILL BE A SHORT 10 SEC DELAY IF AN ALARM EXIT IS TAKEN. THE DELAY FOR INTEGRATION IS
035510,000526: # AS SHORT AS CAN BE MADE, BUT IS ARBITRARY SINCE IT DEPENDS ON THE AGE OF THE STATE VECTOR.
035511,000527:
035512,000528: # CALLING SEQUENCE: CALL
035513,000529: # S61.1
035514,000530:
035515,000531: # C(MPAC) UNSPECIFIED
035516,000532: # PUSHLOC UNSPECIFIED
035517,000533:
035518,000534: # SUBROUTINES CALLED: LOADTIME, CSMPREC, TPAGREE,
035519,000535: # WAITLIST, JOBSLEEP, JOBWAKE, PREREAD, ALARM, GODSPR, BANKCALL, DELAYJOB
035520,000536:
035521,000537: # NORMAL EXIT MODES: RVQ
035522,000538:
035523,000539: # ALARMS: 01426 IMU UNSATISFACTORY
035524,000540: # 01427 IMU REVERSED
035525,000541:
035526,000542: # OUTPUT: POSSIBLE ALARMS
035527,000543: # POSSIBLY TDEC1, RATT, VATT, RN, VN
035528,000544:
035529,000545: # ERASABLE INITIALIZATION REQUIRED:
035530,000546: # AVEGFLAG AVERAGEG ON OR OFF LEFT BY SERVICER
035531,000547: # PIPTIME (-28) CS TIME OF PIPA UPDATE LEFT BY READACCS
035532,000548: # RN (-29) M STATE VECTOR LEFT BY AVERAGEG
035533,000549: # VN (-7) M/CS STATE VECTOR LEFT BY AVERAGEG
035534,000550: # REFSMMAT (-1) .5 REF TO SM MATRIX LEFT BY LAST IMU ALIGNMENT
035535,000551:
035536,000552: # DEBRIS: QPRET
035537,000553: # POSSIBLY PIPTIME1, RATT, VATT, TDEC1, RN1, VN1, QTEMP, X1 IF UPDATED
035538,000554: # PUSH LIST LOCS USED BY CSMPREC
035539,000555:
035540,000556: 26,2544 E6,1661 EBANK= AOG # FOR 60GENRET, S61DT
035541,000557: 26,2544 BANK 26
035542,000558: 26,2000 SETLOC P60S3
035543,000559: 26,2000 BANK
035544,000560:
035545,000561: 26,2544 COUNT* $$/S61.1
035546,000562:
035547,000563: 26,2544 00006 S61.1 EXTEND
035548,000564: 26,2545 23773 QXCH 60GENRET # SAVE RET ADDR IN EB 6
035549,000565: 26,2546 04662 TC BANKCALL
035550,000566: 26,2547 17653 CADR R02BOTH
035551,000567: 26,2550 06006 TC INTPRET
|
|
Page 804
|
035553,000569: 26,2551 45014 BON CALRB
035554,000570: 26,2552 00716 AVEGFLAG # IS AVERAGEG ON
035555,000571: 26,2553 54604 S61.1A # YES
035556,000572: 26,2554 27543 MIDTOAV2 # GET FUTURE STATE VECTOR SOON AS CAN
035557,000573:
035558,000574: 26,2555 30155 CA MPAC +1 # RETURN INHINTED ***
035559,000575: 26,2556 55774 TS S61DT # FOR RESTART.
035560,000576: 26,2557 05245 TC WAITLIST
035561,000577: 26,2560 E7,1431 EBANK= DVCNTR
035562,000578: 26,2560 02565 54067 2CADR S61.1C
035563,000579:
035564,000580: 26,2562 05412 TC PHASCHNG
035565,000581: 26,2563 40434 OCT 40434
035566,000582: 26,2564 05217 TC ENDOFJOB
035567,000583:
035568,000584: 26,2565 35065 S61.1C CA PRIO13
035569,000585: 26,2566 05147 TC FINDVAC
035570,000586: 26,2567 E6,1661 EBANK= AOG
035571,000587: 26,2567 02603 54066 2CADR S61.1A -1
035572,000588:
035573,000589: 26,2571 00006 EXTEND
035574,000590: 26,2572 32643 DCA SERVCAD1 # HE WHO STARTS AVERAGEG MUST SERVICE
035575,000591: 26,2573 53223 DXCH AVEGEXIT # THE EXIT.
035576,000592:
035577,000593: 26,2574 05372 TC 2PHSCHNG
035578,000594: 26,2575 00454 OCT 00454
035579,000595: 26,2576 00415 OCT 00415
035580,000596:
035581,000597: 26,2577 35060 CA EBENTRY # SET EB= 7 FOR PREREAD.
035582,000598: 26,2600 54003 TS EBANK
035583,000599:
035584,000600: 26,2601 04701 TC POSTJUMP
035585,000601: 26,2602 76700 CADR PREREAD # PREREAD DOES TC TASKOVER.
035586,000602:
035587,000603: 26,2603 06006 TC INTPRET
035588,000604: 26,2604 77204 S61.1A BOVB VLOAD
035589,000605: 26,2605 57352 TCDANZIG # TURN OFF OVFIND, IF ON
035590,000606: 26,2606 01177 VN # VN (-7) M/CS
035591,000607: 26,2607 64235 VXV MXV
035592,000608: 26,2610 01171 RN # RN (-29) M
035593,000609: 26,2611 01736 REFSMMAT # .5 UNIT MATRIX
035594,000610: 26,2612 71256 UNIT DLOAD
035595,000611: 26,2613 00160 MPAC +3 # GET COS(THETA)/2
035596,000612: 26,2614 43240 BMN DAD
035597,000613: 26,2615 54622 S61.1B # DO TEST ON -YSM
035598,000614: 26,2616 14645 C(30)LIM # = 1.0 -.5 COS(30)
035599,000615: 26,2617 47004 BOVB RTB
035600,000616: 26,2620 54641 RETRN1
035601,000617: 26,2621 54626 RETRN3
|
|
Page 805
|
035603,000619: 26,2622 43276 S61.1B DCOMP DAD
035604,000620: 26,2623 14645 C(30)LIM # = 1.0 - .5 COS(30)
035605,000621: 26,2624 77404 BOVB EXIT
035606,000622: 26,2625 54631 RETRN2
035607,000623:
035608,000624: 26,2626 05650 RETRN3 TC ALARM
035609,000625: 26,2627 01426 OCT 01426 # IMU UNSATISFACTORY
035610,000626: 26,2630 02633 TC RETRN2 +2
035611,000627:
035612,000628: 26,2631 05650 RETRN2 TC ALARM
035613,000629: 26,2632 01427 OCT 01427 # IMU REVERSED
035614,000630:
035615,000631: 26,2633 35050 +2 CAF V05N09
035616,000632: 26,2634 04662 TC BANKCALL
035617,000633: 26,2635 20676 CADR GODSPR # DO DISPLAY
035618,000634: 26,2636 32646 CA 10SECS
035619,000635: 26,2637 04662 TC BANKCALL
035620,000636: 26,2640 01732 CADR DELAYJOB
035621,000637:
035622,000638: 26,2641 01773 RETRN1 TC 60GENRET
035623,000639:
035624,000640: 26,2642 E7,1431 EBANK= DVCNTR
035625,000641: 26,2642 03226 76067 SERVCAD1 2CADR SERVEXIT
035626,000642:
035627,000643: 26,2644 22111 17335 C(30)LIM 2DEC .566985 # = 1.0 - .5 COS(30)
035628,000644:
035629,000645: 26,2646 01750 10SECS DEC 1000 B-14 # 1000 CS
035630,000646: 26,2647 00000 13560 60SECDP 2DEC 6000 B-28 # 6000 CS
035631,000647:
|
|
Page 806
|
035633,000649: # PROGRAM NAME: S61.2 DATE: 14 FEB 67
035634,000650: # MOD NO: 1 LOG SECTION: P61-P67
035635,000651: # MOD BY: MORTH / BAIRNSFATHER
035636,000652: # MOD NO: 2 MOD BY: MORTH/BAIRNSFATHER DATE: 11 MAY 67 ADD 2ND ITER FOR ERAD AT 400K FT.
035637,000653: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 21 NOV 67 VARIABLE MU ADDED.
035638,000654: # MOD NO: 4 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 68 DIFFERENT EARTH/MOON SCALES IN TFF'S
035639,000655:
035640,000656: # FUNCTIONAL DESCRIPTION: CALLED BY P61. PROVIDES DISPLAYS FOR NOUNS N60 AND N63 .
035641,000657: # PROGRAM CALCULATES ENTRY DISPLAY OF MAXIMUM ACCELERATION EXPECTED (GMAX) AND ALSO THE EXPECTED
035642,000658: # INERTIAL VELOCITY (VPRED) AND ENTRY ANGLE (GAMMAEI) THAT WILL OBTAIN AT 400K FT ABOVE THE FISCHER
035643,000659: # ELLIPSOID. PROGRAM ALSO CALCULATES A SECOND DISPLAY RELATIVE TO THE EMSALT ABOVE FISCHER ELLIPSOID
035644,000660: # AND CONSISTS OF RANGE TO SPLASH FROM NOW (RTGO) , PREDICTED INERTIAL VELOCITY (VIO) , AND THE TIME TO
035645,000661: # GO FROM NOW (TTE) .
035646,000662:
035647,000663: # CALLING SEQUENCE: CALL
035648,000664: # S61.2
035649,000665: # C(MPAC) UNSPECIFIED
035650,000666: # PUSHLOC WILL BE SET TO ZERO.
035651,000667:
035652,000668: # SUBROUTINES CALLED: TFFCONIC, CALCTFF, TFF/TRIG, FISHCALC, GETERAD, VGAMCALC
035653,000669:
035654,000670: # NORMAL EXIT MODES: RTB P61.1
035655,000671:
035656,000672: # ALARMS: NONE
035657,000673:
035658,000674: # OUTPUT: THE FOLLOWING REGISTERS ARE WRITTEN IN FOR USE BY DISPLAYS
035659,000675: # GMAX 100 GMAX (-14) G,S MAXIMUM ACCELERATION
035660,000676: # VPRED (-7) M/CS PREDICTED VELOCITY AT 400K FT
035661,000677: # GAMMAEI GAMMA/360 PREDICTED GAMMA AT 400K FT
035662,000678: # FOR TM, DP(GAMMAEI) = (GAMMAEI, RTGO) / 360
035663,000679: # RTGO THETAH/360 RANGE ANGLE TO SPLASH FROM EMSALT EMSALT IS PAD LOADED
035664,000680: # VIO (-7) M/CS INERTIAL VELOCITY AT EMSALT EMSALT IS PAD LOADED
035665,000681: # TTE (-28) CS TIME TO EMSALT EMSALT IS PAD LOADED
035666,000682: # PUSHLOC = 0
035667,000683: # CONIC PARAMETERS STORED IN VAC AREA (SEE TFF SUBROUTINES)
035668,000684:
035669,000685: # ERASABLE INITIALIZATION REQUIRED:
035670,000686: # RONE (-29) M STATE VECTOR LEFT BY USER
035671,000687: # VONE (-7) M/CS STATE VECTOR LEFT BY USER
035672,000688: # URONE UR/2 LEFT BY USER
035673,000689: # UNI (-1) UNIT NORMAL V*R LEFT BY ENTRY / P61
035674,000690: # THETAH THETAH/360 RANGE ANGLE LEFT BY ENTRY / P61
035675,000691: # UNITW (0) UNIT POLAR VECTOR LEFT BY PAD LOAD
035676,000692: # EMSALT (-29) M EMS INTERFACE ALTITUDE LEFT BY PAD LOAD
035677,000693: # ORBITAL REENTRY: 284643 FT, LUNAR REENTRY: 297431 FT.
035678,000694:
035679,000695: # DEBRIS: QPRET,
035680,000696: # ALL PDL LOCATIONS ABOVE 12D, INCLUDING X1,X2,S1,S2
035681,000697: # ALSO PDL+0 ... PDL+5, WHERE INITIAL PUSHLOC = PDL
035682,000698:
|
|
Page 807
|
035684,000700: # THE FOLLOWING PUSH LIST LOCATIONS HAVE BEEN RESERVED FOR TFF ROUTINES AND ARE REPEATED HERE FOR CONVENIENCE.
035685,000701: # OF COURSE FOR S61.2 USAGE, EARTH ORIGIN SCALING IS USED.
035686,000702:
035687,000703: # BELOW E: IS USED FOR EARTH ORIGIN SCALE
035688,000704: # M: IS USED FOR MOON ORIGIN SCALE
035689,000705:
035690,000706: # RTERM = 18D TERMINAL RADIUS M E: (-29) M: (-27)
035691,000707: # NRTERM = 16D TERMINAL RADIUS M E: (-29+NR)
035692,000708: # M: (-27+NR)
035693,000709: # RMAG1 = 12D PRESENT RADIUS M E: (-29) M: (-27)
035694,000710: # NRMAG = 32D PRESENT RADIUS M E: (-29+NR)
035695,000711: # M: (-27+NR)
035696,000712: # SDELF/2 SIN(THETA) / 2
035697,000713: # CDELF/2 = 14D COS(THETA) / 2
035698,000714: # TFFX = 34D X, ARGUMENT OF SERIES T(X).
035699,000715: # TFFTEM = 36D ARG FOR TRANSFER ANGLE CALCULATION.
035700,000716: # TFFNP = 28D LC P M E: (-38+2NR) M: (-36+2NR)
035701,000717: # TFF/RTMU= 30D 1/SQRT(MU) E: (17) M: (14)
035702,000718: # TFFVSQ = 20D -(VN.VN/MU) 1/M E: (20) M: (18)
035703,000719:
|
|
Page 808
|
035705,000721: 34,3763 BANK 34
035706,000722: 26,2000 SETLOC P60S2
035707,000723: 26,2000 BANK
035708,000724:
035709,000725: 26,2651 COUNT* $$/S61.2
035710,000726: # PDL LEFT AT ZERO BY TARGETNG
035711,000727:
035712,000728: 26,2651 45345 S61.2 DLOAD DSU
035713,000729: 26,2652 02020 EMSALT
035714,000730: 26,2653 15001 290KFT
035715,000731: 26,2654 71244 BPL DLOAD
035716,000732: 26,2655 54775 LUNENT
035717,000733: 26,2656 17354 1/RTMU # ESTABLISH MU FOR ORBITAL ENTRIES
035718,000734: 26,2657 77624 CALLCON CALL
035719,000735: 26,2660 56757 TFFCONIC # FILL VAC AREA WITH CONIC PARAMETERS
035720,000736:
035721,000737: 26,2661 45145 DLOAD CALL
035722,000738: 26,2662 15021 RTRIAL # 1ST GUESS AT TERMINAL RADIUS (-29)
035723,000739: 26,2663 57067 CALCTFF # SAVES MPAC IN RTERM (18D)
035724,000740:
035725,000741: 26,2664 77624 CALL # CALC SDELF/2, CDELF/2
035726,000742: 26,2665 56631 TFF/TRIG # RETURN WITH S(THETA) IN MPAC
035727,000743:
035728,000744: 26,2666 77624 CALL # GET FISCHER RADIUS (-29) M
035729,000745: 26,2667 55030 FISHCALC # ANS IN MPAC AND IN ERADM.
035730,000746:
035731,000747: 26,2670 45015 DAD CALL
035732,000748: 26,2671 02020 EMSALT
035733,000749: 26,2672 57067 CALCTFF # SAVES MPAC IN RTERM (18D)
035734,000750:
035735,000751: 26,2673 77676 DCOMP # NEGATIVE AS IN COUNTDOWN.
035736,000752: 26,2674 03733 STORE TTE1 # DECR TTE FROM BASE TTE1. (RESTART)
035737,000753: # DNLIST AND DSKY WILL USE TTE.
035738,000754: 26,2675 37727 STCALL TTE # LET MISS CONTRL DECR BY ELAPSED TIME
035739,000755: # TTE= TIME FROM NOW TO EMSALT +FISCHER
035740,000756:
035741,000757: 26,2676 56631 TFF/TRIG # S(THETA) IN MPAC ON RETURNING
035742,000758: # AND THETA= RANGE FROM NOW TO EMSALT
035743,000759:
035744,000760: 26,2677 77624 CALL
035745,000761: 26,2700 55030 FISHCALC
035746,000762: 26,2701 77624 CALL
035747,000763: 26,2702 56664 VRCALC
035748,000764: 26,2703 77624 CALL
035749,000765: 26,2704 56651 DISPTARG
035750,000766: 26,2705 77624 CALL
035751,000767: 26,2706 56651 DISPTARG
035752,000768: 26,2707 37714 STCALL RTGO
|
|
Page 809
|
035754,000770: 26,2710 55051 VGAMCALC
035755,000771:
035756,000772: 26,2711 77605 DMP # MPAC = GAMMA
035757,000773: # PDL0 HAS VGAM.
035758,000774: 26,2712 43265 BDDV DAD
035759,000775: 26,2713 15027 VEMSCON # -HS D 180/PI (-14)
035760,000776: 26,2714 00001 0 # VGAM FROM PDL0.
035761,000777: 26,2715 17725 STODL VIO # PREDICTED VELOCITY AT EMSALT.
035762,000778:
035763,000779: # GAMMA AND VGAM AT 300K FT ARE REQUIRED BY GMAX
035764,000780: # ALGORITHM.
035765,000781:
035766,000782: 26,2716 02241 ERADM # EARTH RADIUS FROM GETERAD (-29) M
035767,000783: # = FISCHER RADIUS (-29)
035768,000784:
035769,000785: 26,2717 77615 DAD
035770,000786: 26,2720 06462 300KFT # M (-29)
035771,000787: 26,2721 34023 STCALL RTERM # TERMINAL RADIUS M (-29)
035772,000788:
035773,000789: 26,2722 55046 PREVGAM # VGAMCALC WITH NEW RTERM
035774,000790:
035775,000791: # VBAR = (V(FPS) - 36KF/S) / 20KF/S
035776,000792: # GMAX = (4/(1 + 4.8 VBARSQ))(GAM - 6.05 - 2.4 VBARSQ) - 10(L/D - .3) + 10 ASSUME L/D = 0.3, BANK =0.
035777,000793:
035778,000794: # GMAXCALC
035779,000795: 26,2723 45325 PDDL DSU # GAM TO PDL2
035780,000796: 26,2724 00001 0 # VGAM IS IN PDL0 (-7)
035781,000797: 26,2725 15005 36KFT/S # (-7) M/CS
035782,000798: 26,2726 63471 DDV DSQ
035783,000799: 26,2727 15007 20KFT/S # (-6) M/CS
035784,000800: 26,2730 00001 STORE 0 # VBARSQ (-2) TO PDL0
035785,000801:
035786,000802: 26,2731 43205 DMP DAD
035787,000803: 26,2732 15011 KR1
035788,000804: # GAM, POS DOWN, FROM PDL2
035789,000805: 26,2733 41215 DAD DMP
035790,000806: 26,2734 15013 -6.05DEG
035791,000807: 26,2735 15015 KR2
035792,000808: 26,2736 77725 PDDL # XCH PDL+0 FOR VBARSQ (-2)
035793,000809: 26,2737 43271 DDV DAD
035794,000810: 26,2740 15025 KR4
035795,000811: 26,2741 17366 DP2(-4)
035796,000812: 26,2742 77665 BDDV
035797,000813: # NUM FROM PDL+0
035798,000814: 26,2743 51015 DAD BPL
035799,000815: 26,2744 15017 KR3
035800,000816: 26,2745 54750 +3
035801,000817: 26,2746 77745 DLOAD
035802,000818: 26,2747 15335 HI6ZEROS
035803,000819: 26,2750 17722 STODL GMAX # 100 GMAX (-14)
|
|
Page 810
|
035805,000821: # DISPLAY USES GMAX AS SP, SO LO WORD IS WRITTEN OVER BY VPRED.
035806,000822: 26,2751 02241 ERADM # = FISCHER RADIUS (-29) M
035807,000823: 26,2752 45015 DAD CALL # 2 ND ITERATION FOR FISCHER RADIUS
035808,000824: 26,2753 15023 400KFT
035809,000825: 26,2754 57067 CALCTFF # ESTABLISH TRANSFER ANGLE DATA.
035810,000826: 26,2755 77624 CALL
035811,000827: 26,2756 56631 TFF/TRIG # GET SIN, COS DELF
035812,000828: 26,2757 77624 CALL
035813,000829: 26,2760 55030 FISHCALC # GET CORRESPONDING FISCHER RADIUS.
035814,000830:
035815,000831: 26,2761 73015 DAD LXA,2 # SAVE HI-WORD FOR DOWNLIST.
035816,000832: 26,2762 15023 400KFT # M (-29)
035817,000833: 26,2763 03713 RTGO # (RANGE ANGLE FROM EMSALT) / 360
035818,000834: 26,2764 34023 STCALL RTERM
035819,000835: 26,2765 55046 PREVGAM # VGAMCALC WITH NEW RTERM
035820,000836:
035821,000837: 26,2766 67076 DCOMP SXA,2 # HI-WORD OF EACH ON DOWNLIST.
035822,000838: 26,2767 00155 MPAC +1
035823,000839: 26,2770 17771 STODL GAMMAEI # CONIC GAMMA/360 AT 400K FT. (HI-WORD)
035824,000840: # CONIC RTGO/360 FROM EMSALT (LOW-WORD)
035825,000841: # FOR TM, DP(GAMMAEI) = (GAMMA, RTGO) / 360
035826,000842:
035827,000843: # VGAM FROM PDL+0 (-7)
035828,000844: 26,2771 77626 STADR
035829,000845: 26,2772 74010 STORE VPRED # CONIC VELOCITY AT 400K FT
035830,000846:
035831,000847: 26,2773 77634 RTB
035832,000848: 26,2774 54267 P61.1
035833,000849: # PDL BACK TO ZERO.
035834,000850:
035835,000851: 26,2775 52145 LUNENT DLOAD GOTO
035836,000852: 26,2776 06456 1/RTMUE # ESTABLISH MU FOR LUNAR TYPE ENTRIES
035837,000853: 26,2777 54657 CALLCON
035838,000854: 26,3000 00002 26244 290KFT 2DEC 88392.0 B-29
035839,000855:
035840,000856: 26,3002 00052 05716 KTETA1 2DEC* .421844723 E2 B-14* # 1100 2PI/16384(163.84)
035841,000857:
035842,000858: 26,3004 33335 05707 36KFT/S 2DEC 109.728 B-7 # (-7) M/CS = 36 KFT/S (-7)
035843,000859:
035844,000860: 26,3006 36365 30244 20KFT/S 2DEC 121.92 B-7 # (-6) M/CS = 2 20KFT/S (-7)
035845,000861:
035846,000862: 26,3010 77113 42770 KR1 2DEC -.026666667 # = -2.4 4 / 360
035847,000863:
035848,000864: 26,3012 77354 65030 -6.05DEG 2DEC -.016805556 # = -6.05 / 360
035849,000865:
035850,000866: 26,3014 21450 00001 KR2 2DEC .54931641 # = (360/4) 100 (-14) = 9000 B-14
035851,000867:
035852,000868: 26,3016 01750 00000 KR3 2DEC 1000 B-14 # = 100 (10.0) (-14) G,S
|
|
Page 811
|
035854,000870: # ASSUMES L/D = 0.3, BANK =0.
035855,000871: 26,3020 00305 04541 RTRIAL 2DEC 6460097.18 B-29 # RPAD +284643 FT =21 194 545 FT
035856,000872: # RPAD DEFINED AS 20 909 901.57 FT =6 373 338 M
035857,000873: 26,3022 00003 27040 400KFT 2DEC 121920 B-29 # METERS
035858,000874:
035859,000875: # 300KFT 2DEC 91440 B-29 (-29) M
035860,000876:
035861,000877: # EMSALT 2DEC 86759.2 B-29 284643 FT (-29) M (ORBITAL REENTRY)
035862,000878:
035863,000879: # EMSALT 2DEC 90657 B-29 297431 FT (-29) M (LUNAR REENTRY)
035864,000880:
035865,000881: 26,3024 32525 12525 KR4 2DEC .833333333
035866,000882:
035867,000883: 26,3026 23,2461 300KFT EQUALS MINPERE
035868,000884: 26,3026 77777 76601 VEMSCON 2DEC -.0389676 B-14 # = -HS D / 2 PI (-14) M SQ / CS SQ
035869,000885:
035870,000886: # = -16369 .05G 32.2 .3048 .3048/2 PI (-14)
035871,000887:
|
|
Page 812
|
035873,000889: # SUBROUTINE NAME: FISHCALC (USED BY S61.2) DATE: 01.21.67
035874,000890: # MOD NO: 0 LOG SECTION: P61-P67
035875,000891: # MOD BY: MORTH / BAIRNSFATHER
035876,000892: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 MAY 67 INCLUDE GETERAD CALL
035877,000893:
035878,000894: # FUNCTIONAL DESCRIPTION: GIVEN THE PRESENT POSITION, UNITR, CALCULATE A NEW UNITR THAT IS ROTATED THROUGH
035879,000895: # TRANSFER ANGLE, THETA, ALONG TRAJECTORY. THEN CALCULATE SIN(LAT) AND USE TO OBTAIN FISCHER RADIUS.
035880,000896:
035881,000897: # SINCE FISHCALC USES UNI (LEFT BY ENTRY) EARTH SCALING IS ASSUMED. (WILL IMPROVE FOR SUITABLE TENNANT)
035882,000898:
035883,000899: # CALLING SEQUENCE: CALL
035884,000900: # FISHCALC
035885,000901: # ENTER WITH .5 SIN(THETA) IN MPAC.
035886,000902: # PUSHLOC IS AT PDL+0, AN ARBITRARY BASE VALUE IF LEQ 8D
035887,000903:
035888,000904: # SUBROUTINES CALLED: GET ERAD
035889,000905:
035890,000906: # NORMAL EXIT MODE: RVQ
035891,000907:
035892,000908: # EXIT MODES: NONE
035893,000909:
035894,000910: # OUTPUT: ERADM (-29) M IN MPAC ON RETURNING
035895,000911: # NEW UNIT VECTOR NOT SAVED.
035896,000912: # SIN(LAT) NOT SAVED.
035897,000913: # PUSHLOC AT PDL+0
035898,000914:
035899,000915: # ERASEABLE INITIALIZATION REQUIRED:
035900,000916: # SDELF/2 =SIN(THETA) / 2, IN MPAC LEFT BY TFF/TRIG
035901,000917: # CDELF/2 =COS(THETA) / 2, STORED IN PDL 14D LEFT BY TFF/TRIG
035902,000918: # RONE (-29) M LEFT BY USER
035903,000919: # VONE (-7) M/CS LEFT BY USER
035904,000920: # URONE UR/2 LEFT BY USER
035905,000921: # UNI .5 UNIT(V*R) LEFT BY ENTRY / P61
035906,000922: # UNITW UNIT NORTH POLE LEFT BY PAD LOAD
035907,000923:
035908,000924: # DEBRIS: QPRET, PDL+0 ... PDL+5
035909,000925: # - - -
035910,000926: 26,3030 47315 FISHCALC PDVL VXV # URPR = UR CDELF + UHOR SDELF
035911,000927: 26,3031 02343 URONE
035912,000928: 26,3032 03502 UNI
035913,000929: 26,3033 76561 VXSC VSL1
035914,000930: # SIN(THETA) / 2 FROM PDL+0
035915,000931: 26,3034 74315 PDVL VXSC # TO PDL+0, +5
035916,000932: 26,3035 02343 URONE
035917,000933: 26,3036 00017 CDELF/2 # COS(THETA) / 2
035918,000934: 26,3037 45455 VAD STADR
035919,000935: 26,3040 74235 STORE URH # FOR USE IN RTGO FROM EMS DISPLAY
035920,000936: 26,3041 72441 DOT SL1
035921,000937: 26,3042 01714 UNITW # FULL UNIT VECTOR UNIT NORTH
035922,000938: 26,3043 02156 STORE ALPHAV +4 # = .5 SIN(LAT)
035923,000939: 26,3044 77650 DUMPFISH GOTO
035924,000940: 26,3045 26505 GETERAD # SAVES FISCHER RAD (-29) M IN ERADM AND
035925,000941: # IN MPAC. RETURNS TO CALLER VIQ QPRET.
035926,000942:
|
|
Page 813
|
035928,000944: # SUBROUTINE NAME: VGAMCALC (USED BY S61.2) DATE: 01.21.67
035929,000945: # MOD NO: 0 LOG SECTION: P61-P67
035930,000946: # MOD BY: MORTH / BAIRNSFATHER
035931,000947: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67
035932,000948: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 21 NOV 67 VARIABLE MU ADDED.
035933,000949: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 68 ACCEPT DIFFERENT EARTH/MOON SCALE
035934,000950:
035935,000951: # FUNCTIONAL DESCRIPTION: EARTH CENTERED VIS VIVA CALCULATION OF TERMINAL VELOCITY AND GAMMA (REL TO
035936,000952: # HORIZONTAL) GIVEN THE SCALAR QUANTITIES: PRESENT RADIUS AND VELOCITY AND THE TERMINAL RADIUS.
035937,000953: # THE USER MUST APPEND PROPER SIGN TO GAMMA, SINCE IT IS CALCULATED AS A POSITIVE NUMBER.
035938,000954: # THE EQUATIONS ARE
035939,000955:
035940,000956: # VGAM = SQRT(VN VN/MU + 2(RN-RTERM)/(RN RTERM) ) RTMU
035941,000957:
035942,000958: # COSGAM = H / RTERM VGAM = SQRT (LCP) / (RTERM VGAM/RTMU)
035943,000959:
035944,000960: # VGAMCALC ASSUMES THAT THE TERMINAL RADIUS IS LESS THAN THE PRESENT RADIUS. BOTH CALCTFF AND CALCTPER
035945,000961: # MAKE THIS ASSUMPTION.
035946,000962:
035947,000963: # CALLING SEQUENCE: CALL STCALL RTERM
035948,000964: # VGAMCALC PREVGAM
035949,000965: # PUSHLOC AT PDL+0, ARBITRARY IF LEQ 12D
035950,000966: # C(MPAC) UNSPECIFIED C(MPAC)=NEW RTERM
035951,000967:
035952,000968: # SUBROUTINES CALLED: NONE
035953,000969:
035954,000970: # NORMAL EXIT MODE: RVQ
035955,000971:
035956,000972: # ALARMS: NONE
035957,000973: #
035958,000974: # OUTPUT: GAMMA / 360 IN MPAC, POSITIVE NUMBER
035959,000975: # VGAM E: (-7) M: (-5) M/CS IN PDL+0
035960,000976: # PUSHLOC AT PDL+2
035961,000977:
035962,000978: # ERASABLE INITIALIZATION REQD:
035963,000979: # TFF/RTMU E: (17) M: (14) 1/SQRT(MU) LEFT BY TFFCONIC.
035964,000980: # RMAG1 E: (-29) M: (-27) M PRESENT RADIUS LENGTH LEFT BY TFFCONIC
035965,000981: # NRMAG E: (-29+NR) M NORM LENGTH OF PRESENT POSITION LEFT BY TFFCONIC
035966,000982: # M: (-27+NR)
035967,000983: # RTERM E: (-29) M: (-27) M TERMINAL RADIUS LENGTH LEFT BY CALCTFF
035968,000984: # NRTERM E: (-29+NR) M NORM LENGTH OF TERMINAL RADIUS LEFT BY CALCTFF
035969,000985: # M: (-27+NR)
035970,000986: # TFFVSQ E: (20) M: (18) 1/M -(V SQ/MU): PRESENT VELOCITY, NORM LEFT BY TFFCONIC
035971,000987: # TFFNP E: (-38+2NR) M LCP, SEMI-LATUS RECTUM, WEIGHT NR LEFT BY TFFCONIC
035972,000988: # M: (-36+2NR)
035973,000989:
035974,000990: # DEBRIS: QPRET, PDL+0 ... PDL+3
035975,000991: # RTERM, NRTERM IF PREVGAM ENTERED.
|
|
Page 814
|
035977,000993:
035978,000994: 26,3046 77657 PREVGAM SL* # ENTER WITH NEW RTERM IN MPAC
035979,000995: # E: (-29) M: (-27)
035980,000996: 26,3047 20201 0,1 # X1 = -NR
035981,000997: 26,3050 00021 STORE NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035982,000998:
035983,000999: 26,3051 41345 VGAMCALC DLOAD DMP
035984,001000: 26,3052 00041 NRMAG # RMAG M E: (-29+NR) M: (-27+NR)
035985,001001: 26,3053 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035986,001002: 26,3054 45325 PDDL DSU # RMAG RTERM M E: (-58+2NR) M: (-54+2NR)
035987,001003: 26,3055 00041 NRMAG # RMAG M E: (-29+NR) M: (-27+NR)
035988,001004: 26,3056 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
035989,001005: 26,3057 56257 SL* DDV # 2(RN-RTERM) E: (-30+NR) M: (-28+NR)
035990,001006: 26,3060 20171 0 -8D,1 # (-8+NR)
035991,001007: # PUSH UP PRODUCT.
035992,001008: 26,3061 77625 DSU
035993,001009: 26,3062 00025 TFFVSQ # -(V SQ/MU) E: (20) M: (18)
035994,001010: 26,3063 41566 SQRT PUSH # SAVE VGAM/RT(MU) FOR NOW. E: (10) M: (9)
035995,001011: 26,3064 65271 DDV PDDL # XCH PDL+0, LEAVING VGAM FOR OUTPUT.
035996,001012: # VGAM TO PDL M/CS E: (-7) M: (-2)
035997,001013: 26,3065 00037 TFF/RTMU # E: (17) M: (14)
035998,001014: 26,3066 65205 DMP PDDL # RTERM VGAM/RTMU E: (-19+NR) M: (-18+NR)
035999,001015: 26,3067 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
036000,001016: 26,3070 00035 TFFNP # LC P =H.H/MU M E: (-38+2NR) M: (-36+2NR)
036001,001017: 26,3071 56366 SQRT DDV # E: (-19+NR) M: (-18+NR)
036002,001018: # PUSH UP DEN E: (-19+NR) M: (-18+NR)
036003,001019: # USE DDV OVFL AS LIMITER (|COS| <1.0)
036004,001020: 26,3072 65542 SR1 ACOS
036005,001021: 26,3073 77616 DUMPVGAM RVQ
036006,001022: # CALLER MUST SUPPLY OWN SIGN ...
036007,001023: # 22W 27MS
036008,001024:
|
|
Page 815
|
036010,001026: # SUBROUTINE NAME: TFF/TRIG (USED BY S61.2) DATE 01.17.67
036011,001027: # MOD NO: 0 LOG SECTION: P61-P67
036012,001028: # MOD BY: RR BAIRNSFATHER
036013,001029: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 14 APR 67
036014,001030: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 21 MAR 68 ACCEPT DIFFERENT EARTH/MOON SCALE
036015,001031:
036016,001032: # FUNCTIONAL DESCRIPTION: USED BY ENTRY DISPLAY TO CALCULATE SIN(THETA), COS(THETA) FROM DATA LEFT IN
036017,001033: # PDL BY TFF SUBROUTINES. THE EQNS ARE
036018,001034:
036019,001035: # COS(THETA) = 1-2 ABS(ARG) / (RN RTERM (1+X) )
036020,001036: # 2
036021,001037: # SIN(THETA) = SGN(ARG) SQRT(1-COS (THETA) )
036022,001038:
036023,001039: # WHERE THETA = TRANSFER ANGLE
036024,001040: # AND ARG = P Z ABS(Z) IF ALFA ZZ LEQ 1
036025,001041: # ARG = (P / ALFA) SGN(Q1 + R 1/Z) IF ALFA Z Z G 1
036026,001042: # AND ARG HAS BEEN AFFIXED WITH THE SIGN OF SIN(THETA).
036027,001043:
036028,001044: # CALLING SEQUENCE: CALL
036029,001045: # TFF/TRIG
036030,001046: # PUSHLOC AT PDL+0, ARBITRARY IF NOT EQ 14D
036031,001047: # C(MPAC) UNSPECIFIED
036032,001048:
036033,001049: # SUBROUTINES CALLED: NONE
036034,001050:
036035,001051: # NORMAL EXIT MODES: RVQ
036036,001052:
036037,001053: # ALARMS: NONE
036038,001054:
036039,001055: # OUTPUT: C(MPAC) = .5 SIN(THETA)
036040,001056: # CDELF/2 = .5 COS(THETA) (IN PDL 14D)
036041,001057: # PUSHLOC AT PDL+0
036042,001058:
036043,001059: # ERASABLE INITIALIZATION REQUIRED:
036044,001060: # TFFX X LEFT BY CALCTFF OR CALCTPER
036045,001061: # TFFTEM E: (-59+2NR) ARG LEFT BY CALCTFF OR CALCTPER
036046,001062: # M: (-55+2NR) WHERE ARG = LCP ZZ SGN(DELF) OR ARG = LCP/ALFA SGN(DELF)
036047,001063: # NRTERM E: (-29+NR) M NORM LENGTH OF TERMINAL RADIUS LEFT BY CALCTFF OR CALCTPER
036048,001064: # M: (-27+NR)
036049,001065: # NRMAG E: (-29+NR) M NORM LENGTH OF PRESENT POSITION LEFT BY TFFCONIC
036050,001066: # M: (-27+NR)
036051,001067:
036052,001068: # DEBRIS: QPRET, CDELF/2
036053,001069:
036054,001070: 27,2631 BANK 27
036055,001071: 27,2000 SETLOC P60S5
036056,001072: 27,2000 BANK
036057,001073: 27,2631 70545 TFF/TRIG DLOAD SR1
036058,001074: 27,2632 00043 TFFX
036059,001075: 27,2633 41215 DAD DMP
036060,001076: 27,2634 15333 HIDPHALF
036061,001077: 27,2635 00041 NRMAG # RMAG M E: (-29+NR) M: (-27+NR)
036062,001078: 27,2636 55205 DMP BDDV
036063,001079: 27,2637 00021 NRTERM # RTERM M E: (-29+NR) M: (-27+NR)
036064,001080: 27,2640 00045 TFFTEM # P ZSQ OR P/ALFA E: (-59+2NR) M: (-55+2NR)
036065,001081: 27,2641 44246 ABS BDSU # THE SIGN IS FOR SDELF.
036066,001082: 27,2642 15333 HIDPHALF
036067,001083: 27,2643 00017 STORE CDELF/2 # .5 COS(THETA)
036068,001084: 27,2644 57516 DSQ DCOMP # KEEP HONEST FOR SQRT.
|
|
Page 816
|
036070,001086: 27,2645 75415 DAD SQRT
036071,001087: 27,2646 15325 HIDP1/4
036072,001088: 27,2647 43565 DUMPTRIG SIGN RVQ
036073,001089: 27,2650 00045 TFFTEM # AFFIX SIGN(DELE/2)
036074,001090: # RETURN WITH .5 SIN(THETA) IN MPAC
036075,001091:
036076,001092: # 16W 15MS
036077,001093:
036078,001094: 27,2651 77620 DISPTARG STQ # C(MPAC) = TRGO ESTIMATE
036079,001095: 27,2652 03373 60GENRET
036080,001096: 27,2653 45205 DMP DSU
036081,001097: 27,2654 15003 KTETA1
036082,001098: 27,2655 03733 TTE1
036083,001099: 27,2656 37606 STCALL DTEAROT
036084,001100: 27,2657 46225 EARROT2
036085,001101: 27,2660 77624 CALL
036086,001102: 27,2661 56664 VRCALC
036087,001103: 27,2662 77650 GOTO
036088,001104: 27,2663 03373 60GENRET
036089,001105: 27,2664 50375 VRCALC VLOAD DOT
036090,001106: 27,2665 03542 URH
036091,001107: 27,2666 03474 RT
036092,001108: 27,2667 65512 SL2 ACOS
036093,001109: 27,2670 77616 RVQ
036094,001110:
036095,001111: # END OF PROGRAM S61.2
036096,001112:
|
|
Page 817
|
036098,001114: # PROGRAM DESCRIPTION S62.3 DATE 10JAN67
036099,001115: # MOD NO 1 LOG SECTION P60-P67
036100,001116: # MOD BY ZELDIN
036101,001117: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 15 MAY 67 CHANGED TO REF COORDS.
036102,001118: # MOD NO: 3 MOD BY: RR BAIRNSFATHER DATE: 17 JAN 68 ALFAPAD CHANGES MADE.
036103,001119:
036104,001120: # FUNCTIONAL DESCRIPTION
036105,001121:
036106,001122: # COMPUTE DESIRED GIMBOL ANGLES FOR ENTRY ATTITUDE
036107,001123: # THE FOLLOWING TRAJECTORY TRIAD IS AVAILABLE IN MEMORY AND IS COMPUTED EACH 2 SECONDS BY CM/POSE IN
036108,001124: # REFERENCE COORDINATES (V = VELOCITY RELATIVE TO EARTH) :
036109,001125:
036110,001126: # UXA = -UNIT(V)
036111,001127: # UYA = UNIT(V*R)
036112,001128: # UZA = UXA*UYA
036113,001129:
036114,001130: # GENERATE A DESIRED BODY TRIAD FOR TRIMMED FLIGHT WITH RESPECT TO THE RELATIVE VELOCITY VECTOR, USING
036115,001131: # ROLL COMMAND AND TRIM ANGLE OF ATTACK:
036116,001132:
036117,001133: # UXD = UNIT(UYD*UXA) SIN(ALFATRIM) + UXA COS(ALFATRIM)
036118,001134: # UYD = UYA COS(ROLLC) + UZA SIN(ROLLC)
036119,001135: # UZD = UXD * UYD
036120,001136:
036121,001137: # USE THE DESIRED SET (IN REFERENCE COORDS) AND REFSMMAT TO CALL CALCGA AND OBTAIN GIMBAL ANGLES
036122,001138: # IN 2S, C IN MPAC, +2 AND THETAD, +2.
036123,001139:
036124,001140: # CALLING SEQUENCE
036125,001141:
036126,001142: # L CALL
036127,001143: # L+1 S62.3
036128,001144:
036129,001145: # NORMAL EXIT MODE
036130,001146:
036131,001147: # RETURN VIA QPRET DIRECTLY FROM CALCGA.
036132,001148:
036133,001149: # SUBROUTINES CALLED
036134,001150:
036135,001151: # CALCGA
036136,001152:
036137,001153: # ALARM OR ABORT MODES
036138,001154:
036139,001155: # NONE
036140,001156:
036141,001157: # ERASABLE INITIALIZATION REQUIRED
036142,001158:
036143,001159: # ROLLC ROLL COMMAND DP 1:S COMP AT 1REV
036144,001160: # ALFAPAD SP 1S,C / 180 LEFT BY PAD LOAD ALFATRIM IS NEGATIVE.
036145,001161: # UXA/2 REF COORDS LEFT BY CM/POSE
036146,001162: # UYA/2 REF COORDS LEFT BY CM/POSE
036147,001163: # UZA/2 REF COORDS LEFT BY CM/POSE
036148,001164:
036149,001165: # OUTPUT
036150,001166: #
036151,001167: # CPHI GIMBAL ANGLES (O,I,M) 2:S COMP TP (O,I,M)/180
036152,001168:
036153,001169: # DEBRIS
036154,001170:
036155,001171: # QTEMP, QPRET, PUSHLIST
036156,001172:
036157,001173: 10,2376 BANK 10
036158,001174: 10,2000 SETLOC P60S4
036159,001175: 10,2000 BANK
|
|
Page 818
|
036161,001177: 10,2376 COUNT* $$/S62.3
036162,001178:
036163,001179: 10,2376 67201 S62.3 SETPD SLOAD
036164,001180: 10,2377 00001 0
036165,001181: 10,2400 03012 ALFAPAD # ALFATRIM / 180, ALFA IS NEG.
036166,001182: 10,2401 41542 SR1 PUSH
036167,001183: 10,2402 65346 COS PDDL # XCH PDL, COS TO PDL0
036168,001184: 10,2403 65356 SIN PDDL # SIN TO PDL2
036169,001185: 10,2404 03316 ROLLC
036170,001186: 10,2405 74346 COS VXSC
036171,001187: 10,2406 03550 UYA/2 # REF COORDS
036172,001188: 10,2407 73525 PDDL SIN # PUSH VECTOR INTO PDL4,.9
036173,001189: 10,2410 03316 ROLLC
036174,001190: 10,2411 53361 VXSC VAD
036175,001191: 10,2412 03556 UZA/2 # REF COORDS
036176,001192: # VECTOR FROM PDL4, 9
036177,001193: 10,2413 77772 VSL1
036178,001194: 10,2414 02722 STORE YNB # = UYD REF COORDS
036179,001195:
036180,001196: 10,2415 76435 VXV VSL1
036181,001197: 10,2416 03542 UXA/2 # REF COORDS
036182,001198: 10,2417 65361 VXSC PDDL
036183,001199: # SIN TRIM FROM PDL2
036184,001200: # XCH PDL0 FOR COS TRIM
036185,001201: 10,2420 53361 VXSC VAD
036186,001202: 10,2421 03542 UXA/2 # REF COORDS
036187,001203: # FROM PDL0
036188,001204: 10,2422 77772 VSL1
036189,001205: 10,2423 02714 STORE XNB # X SC AXIS (.5 UNIT) REF COORDS
036190,001206:
036191,001207: 10,2424 76435 VXV VSL1
036192,001208: 10,2425 02722 YNB
036193,001209: 10,2426 26730 STOVL ZNB # Z SC IN REF COOR. SCALED AT 2
036194,001210: 10,2427 01736 REFSMMAT
036195,001211: 10,2430 26672 STOVL XSM
036196,001212: 10,2431 01744 REFSMMAT +6
036197,001213: 10,2432 26700 STOVL YSM
036198,001214: 10,2433 01752 REFSMMAT +12D
036199,001215: 10,2434 02706 STORE ZSM
036200,001216:
036201,001217: 10,2435 52014 CLEAR GOTO
036202,001218: 10,2436 00260 CPHIFLAG # CAUSE CALCGA TO STORE ANS IN TP CPHI
036203,001219: 10,2437 47311 CALCGA
036204,001220: # CALCGA WILL RETURN TO ORIGINAL CALLER
036205,001221: # VIA QPRET WITH 2,S COMP. ANGLES IN CPHI
036206,001222:
036207,001223:
036208,001224:
End of include-file P61-P67.agc. Parent file is MAIN.agc