Co-authored-by: James Harris <wopian@wopian.me>
This commit is contained in:
		| @@ -25,43 +25,41 @@ | |||||||
| #	16:27 JULY 14, 1969 | #	16:27 JULY 14, 1969 | ||||||
|  |  | ||||||
| # Page 984 | # Page 984 | ||||||
| # NAME -- LSPOS -- LOCATE SUN AND MOON			DATE -- 25 OCT 67 | # NAME - LSPOS  - LOCATE SUN AND MOON			DATE - 25 OCT 67 | ||||||
| # MOD NO. 1 | # MOD NO.1 | ||||||
| # MOD BY NEVILLE					ASSEMBLY SUNDANCE | # MOD BY NEVILLE					ASSEMBLY SUNDANCE | ||||||
| # | # | ||||||
| # FUNCTIONAL DESCRIPTION | # FUNCTIONAL DESCRIPTION | ||||||
| # | # | ||||||
| #        COMPUTES UNIT POSITION VECTOR OF THE SUN AND MOON IN THE BASIC REFERENCE SYSTEM. THE SUN VECTOR S IS | #        COMPUTES UNIT POSITION VECTOR OF THE SUN AND MOON IN THE BASIC REFERENCE SYSTEM. THE SUN VECTOR S IS | ||||||
| # LOCATED VIA TWO ANGLES.  THE FIRST ANGLE (OBLIQUITY) IS THE ANGLE BETWEEN THE EARTH EQUATOR AND THE ECLIPTIC.  THE | # LOCATED VIA TWO ANGLES. THE FIRST ANGLE(OBLIQUITY) IS THE ANGLE BETWEEN THE EARTH EQUATOR AND THE ECLIPTIC. THE | ||||||
| # POSITION VECTOR OF THE SUN IS | # SECOND ANGLE IS THE LONGITUDE OF THE SUN MEASURED IN THE ECLIPTIC. | ||||||
| #	_ | # THE POSITION VECTOR OF THE SUN IS | ||||||
| #	S = (COS(LOS), COS(OBL)*SIN(LOS), SIN(OBL)*SIN(LOS)), WHERE | #	 - | ||||||
|  | #	 S=(COS(LOS), COS(OBL)*SIN(LOS), SIN(OBL)*SIN(LOS)), WHERE | ||||||
| # | # | ||||||
| #	LOS = LOS +LOS *T-(C *SIN(2PI*T)/365.24 +C *COS(2PI*T)/365.24) | #      LOS=LOS +LOS *T-(C *SIN(2PI*T)/365.24 +C *COS(2PI*T)/365.24) | ||||||
| #	      0    R     0                     1 | #	      0    R     0                     1 | ||||||
| #      LOS  (RAD) IS THE LONGITUDE OF THE SUN FOR MIGNIGHT JUNE 30TH OF THE PARTICULAR YEAR. | #      LOS  (RAD) IS THE LONGITUDE OF THE SUN FOR MIGNIGHT JUNE 30TH OF THE PARTICULAR YEAR. | ||||||
| #         0 | #         0 | ||||||
| #      LOS  (RAD/DAY) IS THE MEAN RATE FOR THE PARTICULAR YEAR. | #      LOS  (RAD/DAY) IS THE MEAN RATE FOR THE PARTICULAR YEAR. | ||||||
| #    	  R | #    	  R | ||||||
| # | # LOS  AND LOS  ARE STORED AS LOSO AND LOSR IN RATESP. | ||||||
| # LOS  AND LOS  ARE STORED AS LOSC AND LOSR IN RATESP. |  | ||||||
| #    0        R | #    0        R | ||||||
| # COS(OBL) AND SIN(OBL) ARE STORED IN THE MATRIX KONMAT. | # COS(OBL) AND SIN(OBL) ARE STORED IN THE MATRIX KONMAT. | ||||||
| # | # T, TIME MEASURED IN DAYS(24 HOURS), IS STORED IN TIMEP. | ||||||
| # T, TIME MEASURED IN DAYS (24 HOURS) IS STORED IN TIMEP. | # C  AND C  ARE FUDGE FACTORS TO MINIMIZE THE DEVIATION. THEY ARE STORED AS ONE CONSTANT(CMOD), SINCE | ||||||
| # |  | ||||||
| # C  AND C  ARE FUDGE FACTORS TO MINIMIZE THE DEVIATION.  THEY ARE STORED AS ONE CONSTANT (CMOD), SINCE |  | ||||||
| #  0      1                               2  2 1/2 | #  0      1                               2  2 1/2 | ||||||
| # C *SIN(X)+C *COS(X) CAN BE WRITTEN AS (C +C )   *SIN(X+PHI), WHERE PHI=ARCTAN(C /C ). | # C *SIN(X)+C *COS(X) CAN BE WRITTEN AS (C +C )   *SIN(X+PHI), WHERE PHI=ARCTAN(C /C ). | ||||||
| #                                         0  1                                   1  0 | #  0         1                            0  1                                   1  0 | ||||||
| # | # | ||||||
| # THE MOON IS LOCATED VIA FOUR ANGLES, THE FIRST IS THE OBLIQUITY. THE SECOND IS THE MEAN LONGITUDE OF THE MOON, | # THE MOON IS LOCATED VIA FOUR ANGLES. THE FIRST IS THE OBLIQUITY. THE SECOND IS THE MEAN LONGITUDE OF THE MOON, | ||||||
| # MEASURED IN THE ECLIPTIC FROM THE MEAN EQUINOX TO THE MEAN ASCENDING NODE OF THE LUNAR ORBIT, AND THEN ALONG THE | # MEASURED IN THE ECLIPTIC FROM THE MEAN EQUINOX TO THE MEAN ASCENDING NODE OF THE LUNAR ORBIT, AND THEN ALONG THE | ||||||
| # ORBIT. THE THIRD ANGLE IS THE ANGLE BETWEEN THE ECLIPTIC AND THE LUNAR ORBIT. THE FOURTH ANGLE IS THE LONGITUDE | # ORBIT. THE THIRD ANGLE IS THE ANGLE BETWEEN THE ECLIPTIC AND THE LUNAR ORBIT. THE FOURTH ANGLE IS THE LONGITUDE | ||||||
| # OF THE NODE OF THE MOON, MEASURED IN THE LUNAR ORBIT. LET THESE ANGLES BE OBL,LOM,IM, AND LON RESPECTIVELY. | # OF THE NODE OF THE MOON, MEASURED IN THE LUNAR ORBIT. LET THESE ANGLES BE OBL,LOM,IM, AND LON RESPECTIVELY. | ||||||
| # | # | ||||||
| # THE SIMPLIFIED POSITION VECTOR OF THE MOON IS | # THE SIMPLIFIED POSITION VECTOR OF THE MOON IS | ||||||
| #	_ | #   - | ||||||
| #   M=(COS(LOM), COS(OBL)*SIN(LOM)-SIN(OBL)*SIN(IM)*SIN(LOM-LON), SIN(OBL)*SIN(LOM)+COS(OBL)*SIN(IM)*SIN(LOM-LON)) | #   M=(COS(LOM), COS(OBL)*SIN(LOM)-SIN(OBL)*SIN(IM)*SIN(LOM-LON), SIN(OBL)*SIN(LOM)+COS(OBL)*SIN(IM)*SIN(LOM-LON)) | ||||||
| # | # | ||||||
| #   WHERE | #   WHERE | ||||||
| @@ -69,60 +67,49 @@ | |||||||
| #	      0    R     0                     1                     0                1 | #	      0    R     0                     1                     0                1 | ||||||
| #      LON=LON +LON | #      LON=LON +LON | ||||||
| #	      0    R | #	      0    R | ||||||
| # A , A , B  AND B  ARE STORE AS AMOD AND BMOD (SEE DESCRIPTION OF CMOD, ABOVE).  COS(OBL), SIN(OBL)*SIN(IM), | # A , A , B  AND B  ARE STORED AS AMOD AND BMOD (SEE DESCRIPTION OF CMOD, ABOVE).  COS(OBL), SIN(OBL)*SIN(IM), | ||||||
| #  0   1   0      1 | #  0   1   0      1 | ||||||
| # SIN(OBL), AND COS(OBL)*SIN(IM) ARE STORED IN KONMAT AS K1, K2, K3, AND K4, RESPECTIVELY.  LOM , LOM , LON , LON | # SIN(OBL), AND COS(OBL)*SIN(IM) ARE STORED IN KONMAT AS K1, K2, K3 AND K4, RESPECTIVELY. LOM , LOM , LON , LON | ||||||
| #                                                                                              0     R     0     R | # ARE STORED AS LOMO, LOMR, LONO, AND LONR IN RATESP.                                        0     R     0     R | ||||||
| # ARE STORED AS LOM0, LOMR, LON0, AND LONR IN RATESP. |  | ||||||
| # |  | ||||||
| # THE THREE PHIS ARE STORED AS AARG, BARG, AND CARG(SUN).  ALL CONSTANTS ARE UPDATED BY YEAR. | # THE THREE PHIS ARE STORED AS AARG, BARG, AND CARG(SUN).  ALL CONSTANTS ARE UPDATED BY YEAR. | ||||||
| # | # | ||||||
| # CALLING SEQUENCE | # CALLING SEQUENCE | ||||||
| # Page 985 | # Page 985 | ||||||
| #	CALL LSPOS.  RETURN IS VIA CPRET. | #   CALL LSPOS.  RETURN IS VIA QPRET. | ||||||
| # |  | ||||||
| # ALARMS OR ABORTS | # ALARMS OR ABORTS | ||||||
| #   NONE | #   NONE | ||||||
| # |  | ||||||
| # ERASABLE INITIALIZATION REQUIRED | # ERASABLE INITIALIZATION REQUIRED | ||||||
| #	TEPHEM -- TIME FROM MIGNIGHT 1 JULY PRECEDING THE LAUNCH TO THE TIME OF THE LAUNCH (WHEN THE AGC CLOCK WENT | #   TEPHEM - TIME FROM MIGNIGHT 1 JULY PRECEDING THE LAUNCH TO THE TIME OF THE LAUNCH (WHEN THE AGC CLOCK WENT | ||||||
| # TO ZERO). TEPHEM IS TP WITH UNITS OF CENTI-SECONDS. | # TO ZERO). TEPHEM IS TP WITH UNITS OF CENTI-SECONDS. | ||||||
| # |  | ||||||
| #   TIME2 AND TIME1 ARE IN MPAC AND MPAC +1 WHEN PROGRAM IS CALLED. | #   TIME2 AND TIME1 ARE IN MPAC AND MPAC +1 WHEN PROGRAM IS CALLED. | ||||||
| # |  | ||||||
| # OUTPUT | # OUTPUT | ||||||
| #   UNIT POSITIONAL VECTOR OF SUN IN VSUN.   (SCALED B-1) | #   UNIT POSITIONAL VECTOR OF SUN IN VSUN.   (SCALED B-1) | ||||||
| #   UNIT POSITIONAL VECTOR OF MOON IN VMOON. (SCALED B-1) | #   UNIT POSITIONAL VECTOR OF MOON IN VMOON. (SCALED B-1) | ||||||
| # |  | ||||||
| # SUBROUTINES USED | # SUBROUTINES USED | ||||||
| #   NONE | #   NONE | ||||||
| # |  | ||||||
| # DEBRIS | # DEBRIS | ||||||
| #	CURRENT CORE SET, WORK AREA AND FREEFLAG | #   CURRENT CORE SET,WORK AREA AND FREEFLAG | ||||||
|  |  | ||||||
| 		BANK	04 | 		BANK	04 | ||||||
| 		SETLOC	EPHEM | 		SETLOC	EPHEM | ||||||
| 		BANK | 		BANK | ||||||
|  |  | ||||||
| 		EBANK=	VSUN | 		EBANK=	VSUN | ||||||
| 		COUNT*	$$/EPHEM | 		COUNT*	$$/EPHEM | ||||||
| LUNPOS		EQUALS	LSPOS | LUNPOS		EQUALS	LSPOS | ||||||
|  |  | ||||||
| LSPOS		SETPD	SR | LSPOS		SETPD	SR | ||||||
| 			0 | 			0 | ||||||
| 			14D		# TP | 			14D		# TP | ||||||
| 		TAD	DDV | 		TAD	DDV | ||||||
| # HG comments in [...] are hand written comments in original listing | ## Comments in [...] are hand-written notations in original listing | ||||||
| 			TEPHEM		# TIME OF LAUNCH [IN CENTISEC B 42] | 			TEPHEM		# TIME OF LAUNCH [in centisec B 42] | ||||||
| 			CSTODAY		# 24 HOURS -- 8640000 CENTI-SECS/DAY B-33 | 			CSTODAY		# 24 HOURS-8640000 CENTI-SECS/DAY B-33 | ||||||
| 		STORE	TIMEP		# T IN DAYS [@ B 9 = 512 DAYS] | 		STORE	TIMEP		# T IN DAYS [@ B 9 = 512 days] | ||||||
| 		AXT,1	AXT,2		#	    [GRANULRITY = 0.164 SEC] | 		AXT,1	AXT,2		#	    [∴ granularity ≈ 0.164 sec] | ||||||
| 			0 | 			0 | ||||||
| 			0 | 			0 | ||||||
| 		CLEAR | 		CLEAR | ||||||
| 			FREEFLAG	# SWITCH BIT | 			FREEFLAG	# SWITCH BIT | ||||||
| POSITA		DLOAD | POSITA		DLOAD | ||||||
| 			KONMAT +2	# ZEROS | 			KONMAT +2	# ZERO$ | ||||||
| 		STORE	GTMP | 		STORE	GTMP | ||||||
| POSITB		DLOAD	DMP* | POSITB		DLOAD	DMP* | ||||||
| 			TIMEP		# T | 			TIMEP		# T | ||||||
| @@ -132,11 +119,11 @@ POSITB		DLOAD	DMP* | |||||||
| 			8D | 			8D | ||||||
| 			VAL67 +2,1	# AARG | 			VAL67 +2,1	# AARG | ||||||
| 		SIN	DMP*		# SIN(T/27+PHI) OR T/32 OR T/365 | 		SIN	DMP*		# SIN(T/27+PHI) OR T/32 OR T/365 | ||||||
| 			VAL67,1		# (A0**2+A1**2)**1/2 SIN(X+PHIA) | 			VAL67,1		# (A0**2+A1**2)**1/2SIN(X+PHIA) | ||||||
| 		DAD	INCR,1		# PLUS | 		DAD	INCR,1		# PLUS | ||||||
| 			GTMP		# (B0**2+B1**2)**1/2 SIN(X+PHIB) | 			GTMP		# (B0**2+B1**2)**1/2SIN(X+PHIB) | ||||||
| 		DEC	-6 | 		DEC	-6 | ||||||
| 		STORE	GTMP		# OR (C0**2+C1**2)**1/2 SIN(X+PHIC) | 		STORE	GTMP		# OR (C0**2+C1**2)**1/2SIN(X+PHIC) | ||||||
| 		BOFSET | 		BOFSET | ||||||
| 			FREEFLAG | 			FREEFLAG | ||||||
| 			POSITB | 			POSITB | ||||||
| @@ -145,7 +132,7 @@ POSITD		DLOAD	DMP* | |||||||
| 			RATESP,2	# LOMR,LOSR,LONR | 			RATESP,2	# LOMR,LOSR,LONR | ||||||
| 		SL	DAD* | 		SL	DAD* | ||||||
| 			5D | 			5D | ||||||
| 			RATESP +6,2	# LOM0,LOS0,LON0 | 			RATESP +6,2	# LOMO,LOSO,LONO | ||||||
| 		DSU | 		DSU | ||||||
| 			GTMP | 			GTMP | ||||||
| 		STORE	STMP,2		# LOM,LOS,LON | 		STORE	STMP,2		# LOM,LOS,LON | ||||||
| @@ -184,7 +171,7 @@ POSITE		DLOAD | |||||||
| 		STORE	GTMP | 		STORE	GTMP | ||||||
| 		GOTO | 		GOTO | ||||||
| 			POSITD | 			POSITD | ||||||
| LUNVEL		RVQ | LUNVEL		RVQ                     #         TO FOOL INTEGRATION | ||||||
| 		SETLOC	EPHEM1 | 		SETLOC	EPHEM1 | ||||||
| 		BANK | 		BANK | ||||||
|  |  | ||||||
|   | |||||||
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