MEASUREMENT_INCORPORATION.agc

# Copyright:	Public domain.
# Filename:	MEASUREMENT_INCORPORATION.agc
# Purpose:	Part of the source code for Colossus 2A, AKA Comanche 055.
#		It is part of the source code for the Command Module's (CM)
#		Apollo Guidance Computer (AGC), for Apollo 11.
# Assembler:	yaYUL
# Contact:	Ron Burkey <info@sandroid.org>.
# Website:	www.ibiblio.org/apollo.
# Pages:	1252-1261
# Mod history:	2009-05-14 RSB	Adapted from the Colossus249/ file of the
#				same name, using Comanche055 page images.
#
# This source code has been transcribed or otherwise adapted from digitized
# images of a hardcopy from the MIT Museum.  The digitization was performed
# by Paul Fjeld, and arranged for by Deborah Douglas of the Museum.  Many
# thanks to both.  The images (with suitable reduction in storage size and
# consequent reduction in image quality as well) are available online at
# www.ibiblio.org/apollo.  If for some reason you find that the images are
# illegible, contact me at info@sandroid.org about getting access to the
# (much) higher-quality images which Paul actually created.
#
# Notations on the hardcopy document read, in part:
#
#	Assemble revision 055 of AGC program Comanche by NASA
#	2021113-051.  10:28 APR. 1, 1969
#
#	This AGC program shall also be referred to as
#			Colossus 2A

# Page 1252
#  INCORP1--PERFORMS THE SIX DIMENSIONAL STATE VECTOR DEVIATION FOR POSITI
# ON AND VELOCITY OR THE NINE DIMENSIONAL DEVIATION OF POSITION,VELOCITY,A
# ND RADAR OR LANDMARK BIAS.THE OUTPUT OF THE BVECTOR ROUTINE ALONG WITH T
# HE ERROR TRANSITION MATRIX(W) ARE USED AS INPUT TO THE ROUTINE.THE DEVIA
# TION IS OBTAINED BY COMPUTING AN ESTIMATED TRACKING MEASUREMENT FROM THE
# CURRENT STATE VECTOR AND COMPARING IT WITH AN ACTUAL TRACKING MEASUREMEN
# T AND APPLYING A STATISTICAL WEIGHTING VECTOR.
# INPUT
#   DMENFLG = 0 6DIMENSIONAL BVECTOR  1= 9DIMENSIONAL
#          W = ERROR TRANSITION MATRIX 6X6 OR 9X9
#   VARIANCE = VARIANCE (SCALAR)
#     DELTAQ = MEASURED DEVIATION(SCALAR)
#    BVECTOR = 6 OR 9 DIMENSIONAL BVECTOR
#
# OUTPUT
#      DELTAX = STATE VECTOR DEVIATIONS 6 OR 9 DIMENSIONAL
#	   ZI = VECTOR USED FOR THE INCORPORATION 6 OR 9 DIMENSIONAL
#     GAMMA = SCALAR
#     OMEGA = OMEGA WEIGHTING VECTOR 6 OR 9 DIMENSIONAL
#
# CALLING SEQUENCE
#    L  CALL INCORP1
#
# NORMAL EXIT
#    L+1 OF CALLING SEQUENCE

		BANK	37
		SETLOC	MEASINC
		BANK

		COUNT*	$$/INCOR

		EBANK=	W

INCORP1		STQ
			EGRESS
		AXT,1	SSP
			54D
			S1
			18D		# IX1 = 54 	S1= 18
		AXT,2	SSP
			18D
			S2
			6		# IX2 = 18	S2=6
Z123		VLOAD	MXV*
			BVECTOR		# BVECTOR (0)
			W +54D,1
		STORE	ZI +18D,2
		VLOAD
			BVECTOR +6	# BVECTOR (1)
# Page 1253
		MXV*	VAD*
			W +108D,1
			ZI +18D,2
		STORE	ZI +18D,2
		VLOAD
			BVECTOR +12D	# BVECTOR (2)
		MXV*	VAD*
			W +162D,1
			ZI +18D,2	# B(0)*W+B(1)*(W+54)+B(2)*(W+108)FIRST PAS
		STORE	ZI +18D,2	# ZI THEN Z2 THEN Z3
		TIX,1
			INCOR1
INCOR1		TIX,2	BON
			Z123		# LOOP FOR Z1,Z2,Z3
			DMENFLG
			INCOR1A
		VLOAD
			ZEROVECS
		STORE	ZI +12D
INCOR1A		SETPD	VLOAD
			0
			ZI
		VSQ	RTB
			TPMODE
		PDVL	VSQ
			ZI +6
		RTB	TAD
			TPMODE
		PDVL	VSQ
			ZI +12D
		RTB	TAD
			TPMODE
		TAD	AXT,2
			VARIANCE
			0
		STORE	TRIPA		# ZI*2 + Z2*2 + Z3*2 + VARIANCE
		TLOAD	BOV
			VARIANCE	# CLEAR OVFIND
			+1
		STORE	TEMPVAR		# TEMP STORAGE FOR VARIANCE
		BZE
			INCOR1C
INCOR1B		SL2	BOV
			INCOR1C
		STORE	TEMPVAR
		INCR,2	GOTO
		DEC	1
			INCOR1B
INCOR1C		TLOAD	ROUND
			TRIPA
# Page 1254
		DMP	SQRT
			TEMPVAR
		SL*	TAD
			0,2
			TRIPA
		NORM	INCR,2
			X2
		DEC	-2
		SXA,2	AXT,2
			NORMGAM		# NORMALIZATION COUNT -2 FOR GAMMA
			162D
		BDDV	SETPD
			DP1/4TH
			0
		STORE	GAMMA
		TLOAD	NORM
			TRIPA
			X1
		DLOAD	PDDL		# PD 0-1 = NORM (A)
			MPAC
			DELTAQ
		NORM
			S1
		XSU,1	SR1
			S1
		DDV	PUSH		# PD 0-1 = DELTAQ/A
		GOTO
			NEWZCOMP
   -3		SSP
			S2
			54D
INCOR2		VLOAD	VXM*		# COMPUT OMEGA1,2,3
			ZI
			W +162D,2
		PUSH	VLOAD
			ZI +6
		VXM*	VAD
			W +180D,2
		PUSH	VLOAD
			ZI +12D
		VXM*	VAD
			W +198D,2
		PUSH	TIX,2		# PD 2-7=OMEGA1,8-13=OMEGA2,14-19=OMEGA3
			INCOR2
		VLOAD	STADR
		STORE	OMEGA +12D
		VLOAD	STADR
		STORE	OMEGA +6
		VLOAD	STADR
		STORE	OMEGA
# Page 1255
		BON	VLOAD
			DMENFLG
			INCOR2AB
			ZEROVECS
		STORE	OMEGA +12D
INCOR2AB	AXT,2	SSP
			18D
			S2
			6
INCOR3		VLOAD*
			OMEGA +18D,2
		VXSC	VSL*
			0		# DELTAQ/A
			0,1
		STORE	DELTAX +18D,2
		TIX,2	VLOAD
			INCOR3
			DELTAX +6
		VSL3
		STORE	DELTAX +6
		GOTO
			EGRESS

# Page 1256
#  INCORP2 -INCORPORATES THE COMPUTED STATE VECTOR DEVIATIONS INTO THE
# ESTIMATED STATE VECTOR. THE STATE VECTOR UPDATED MAY BE FOR EITHER THE
# LEM OR THE CSM.DETERMINED BY FLAG VEHUPFLG.(ZERO = LEM) (1 = CSM)
# INPUT
#    PERMANENT STATE VECTOR FOR EITHER THE LEM OR CSM
#    VEHUPFLG = UPDATE VEHICLE C=LEM  1=CSM
#    W = 	ERROR TRANSITION MATRIX
#    DELTAX  = 	COMPUTED STATE VECTOR DEVIATIONS
#    DMENFLG = 	SIZE OF W MATRIX (ZERO=6X6) (1=9X9)
#    GAMMA   = 	SCALAR FOR INCORPORATION
#    ZI      = 	VECTOR USED IN INCORPORATION
#    OMEGA   = 	WEIGHTING VECTOR
#
# OUTPUT
#    UPDATED PERMANENT STATE VECTOR
#
# CALLING SEQUENCE
#    L	 CALL INCORP2
#
# NORMAL EXIT
#    L+1 OF CALLING SEQUENCE
#

		SETLOC	MEASINC1
		BANK

		COUNT*	$$/INCOR

INCORP2		STQ	CALL
			EGRESS
			INTSTALL
		VLOAD	VXSC		# CALC. GAMMA * OMEGA1,2,3
			OMEGA
			GAMMA
		STOVL	OMEGAM1
			OMEGA +6
		VXSC
			GAMMA
		STOVL	OMEGAM2
			OMEGA +12D
		VXSC
			GAMMA
		STORE	OMEGAM3
		EXIT
		CAF	54DD		# INITIAL IX 1 SETTING FOR W MATRIX
		TS	WIXA
		TS	WIXB
		CAF	ZERO
		TS	ZIXA		# INITIAL IX 2 SETTING FOR Z COMPONENT
		TS	ZIXB
FAZA		TC	PHASCHNG
# Page 1257
		OCT	04022
		TC	UPFLAG
		ADRES	REINTFLG
FAZA1		CA	WIXB		# START FIRST PHASE OF INCORP2
		TS	WIXA		#  TO UPDATE 6 OR 9 DIM. W MATRIX IN TEMP
		CA	ZIXB
		TS	ZIXA
		TC	INTPRET
		LXA,1	LXA,2
			WIXA
			ZIXA
		SSP	DLOAD*
			S1
			6
			ZI,2
		DCOMP	NORM		# CALC UPPER 3X9 PARTITION OF W MATRIX
			S2
		VXSC	XCHX,2
			OMEGAM1
			S2
		LXC,2	XAD,2
			X2
			NORMGAM
		VSL*	XCHX,2
			0,2
			S2
		VAD*
			W +54D,1
		STORE	HOLDW
		DLOAD*	DCOMP		# CALC MIDDLE 3X9 PARTITION OF W MATRIX
			ZI,2
		NORM	VXSC
			S2
			OMEGAM2
		XCHX,2	LXC,2
			S2
			X2
		XAD,2	VSL*
			NORMGAM
			0,2
		XCHX,2	VAD*
			S2
			W +108D,1
		STORE	HOLDW +6
		BOFF
			DMENFLG		# BRANCH IF 6 DIMENSIONAL
			FAZB
		DLOAD*	DCOMP		# CALC LOWER 3X9 PARTITION OF W MATRIX
			ZI,2
		NORM	VXSC
# Page 1258
			S2
			OMEGAM3
		XCHX,2	LXC,2
			S2
			X2
		XAD,2	VSL*
			NORMGAM
			0,2
		XCHX,2	VAD*
			S2
			W +162D,1
		STORE	HOLDW +12D
FAZB		CALL
			GRP2PC
		EXIT
FAZB1		CA	WIXA		# START 2ND PHASE OF INCORP2 TO TRANSFER
		AD	6DD		#     TEMP REG TO PERM W MATRIX
		TS	WIXB
		CA	ZIXA
		AD	MINUS2
		TS	ZIXB
		TC	INTPRET
		LXA,1	SSP
			WIXA
			S1
			6
		VLOAD
			HOLDW
		STORE	W +54D,1
		VLOAD
			HOLDW +6
		STORE	W +108D,1
		BOFF	VLOAD
			DMENFLG
			FAZB5
			HOLDW +12D
		STORE	W +162D,1
FAZB2		TIX,1	GOTO
			+2
			FAZC		# DONE WITH W MATRIX. UPDATE STATE VECTOR
		RTB
			FAZA
FAZB5		SLOAD	DAD
			ZIXB
			12DD
		BHIZ	GOTO
			FAZC
			FAZB2
FAZC		CALL
			GRP2PC
# Page 1259
		VLOAD	VAD		# START 3RD PHASE OF INCORP2
			X789		# 7TH,8TH,9TH,COMPONENT OF STATE VECTOR
			DELTAX +12D	# INCORPORATION FOR X789
		STORE	TX789
		BON	RTB
			VEHUPFLG
			DOCSM
			MOVEPLEM
FAZAB		BOVB	AXT,2
			TCDANZIG
			0
		BOFF	AXT,2
			MOONTHIS
			+2
			2
		VLOAD	VSR*
			DELTAX		# B27 IF MOON ORBIT, B29 IF EARTH
			0 -7,2
		VAD	BOV
			TDELTAV
			FAZAB1
		STOVL	TDELTAV
			DELTAX +6	# B5 IF MOON ORBIT, B7 IF EARTH
		VSR*	VAD
			0 -4,2
			TNUV
		BOV
			FAZAB2
		STCALL	TNUV
			FAZAB3
FAZAB1		VLOAD	VAD
			RCV
			DELTAX
		STORE	RCV
FAZAB2		VLOAD	VAD
			VCV
			DELTAX +6
		STORE	VCV
		SXA,2	CALL
			PBODY
			RECTIFY
FAZAB3		CALL
			GRP2PC
		BON	RTB
			VEHUPFLG
			DOCSM1
			MOVEALEM
		CALL
			SVDWN2		# STORE DOWNLINK STATE VECTOR
FAZAB4		CALL
# Page 1260
			GRP2PC		# PHASE CHANGE
		BOFF	VLOAD
			DMENFLG
			FAZAB5		# 6 DIMENSIONAL
			TX789		# 9 DIMENSIONAL
		STORE	X789
FAZAB5		LXA,1	SXA,1
			EGRESS
			QPRET
		EXIT
		TC	POSTJUMP	# EXIT
		CADR	INTWAKE
DOCSM		RTB	GOTO
			MOVEPCSM
			FAZAB
DOCSM1		RTB	CALL
			MOVEACSM
			SVDWN1		# STORE DOWNLINK STATE VECTOR
		GOTO
			FAZAB4
ZEROD		=	ZEROVECS
54DD		DEC	54
6DD		DEC	-6
12DD		DEC	12
		SETLOC	MEASINC2
		BANK
		COUNT*	$$/INCOR

NEWZCOMP	VLOAD	ABVAL
			ZI
		STOVL	NORMZI
			ZI +6
		ABVAL	PUSH
		DSU	BMN
			NORMZI
			+3
		DLOAD	STADR
		STORE	NORMZI
		VLOAD	ABVAL
			ZI +12D
		PUSH	DSU
			NORMZI
		BMN	DLOAD
			NEWZCMP1
		STADR
		STCALL	NORMZI		# LARGEST ABVAL
			NEWZCMP1

		SETLOC	MEASINC3
		BANK
# Page 1261
NEWZCMP1		DLOAD	SXA,1
			NORMZI
			NORMZI		# SAVE X1
		NORM	INCR,1
			X1
		DEC	2
		VLOAD	VSL*
			ZI
			0,1
		STOVL	ZI
			ZI +6
		VSL*
			0,1
		STOVL	ZI +6
			ZI +12D
		VSL*	SXA,1
			0,1
			NORMZI +1	# SAVE SHIFT
		STORE	ZI +12D
		LXA,1	XSU,1
			NORMGAM
			NORMZI +1
		XSU,1
			NORMZI +1
		SXA,1	LXC,1
			NORMGAM
			NORMZI +1
		XAD,1	SETPD
			NORMZI
			2D
		GOTO
			INCOR2 -3
NORMZI		=	36D