Revision 3f621a35c98ce9e300471015d543202bedf6edb6 authored by Mike Stewart on 04 December 2020, 07:56:35 UTC, committed by Mike Stewart on 04 December 2020, 07:56:35 UTC
1 parent a31c52f
STABLE_ORBIT_-_P38-P39.agc
### FILE="Main.annotation"
## Copyright: Public domain.
## Filename: STABLE_ORBIT_-_P38-P39.agc
## Purpose: A section of an attempt to reconstruct Sundance revision 306
## as closely as possible with available information. Sundance
## 306 is the source code for the Lunar Module's (LM) Apollo
## Guidance Computer (AGC) for Apollo 9. This program was created
## using the mixed-revision SundanceXXX as a starting point, and
## pulling back features from Luminary 69 believed to have been
## added based on memos, checklists, observed address changes,
## or the Sundance GSOPs.
## Assembler: yaYUL
## Contact: Ron Burkey <info@sandroid.org>.
## Website: www.ibiblio.org/apollo/index.html
## Mod history: 2020-07-24 MAS Created from SundanceXXX.
# STABLE ORBIT RENDEZVOUS PROGRAMS (P38 AND P78)
#
# MOD NO -1 LOG SECTION - STABLE ORBIT - P38-P39
# MOD BY RUDNICKI.S DATE 25JAN68
#
# FUNCTIONAL DESCRIPTION
#
# P38 AND P78 CALCULATE THE REQUIRED DELTA V AND OTHER INITIAL
# CONDITIONS REQUIRED BY THE AGC TO (1) PUT THE ACTIVE VEHICLE
# ON A TRANSFER TRAJECTORY THAT INTERCEPTS THE PASSIVE VEHICLE
# ORBIT A GIVEN DISTANCE, DELTA R, EITHER AHEAD OF OR BEHIND THE
# PASSIVE VEHICLE AND (2) ACTUALLY PLACE THE ACTIVE VEHICLE IN THE
# PASSIVE VEHICLE ORBIT WITH A DELTA R SEPARATION BETWEEN THE TWO
# VEHICLES
#
# CALLING SEQUENCE
#
# ASTRONAUT REQUEST THRU DSKY
#
# V37E38E IF THIS VEHICLE IS ACTIVE VEHICLE
# V37E78E IF OTHER VEHICLE IS ACTIVE VEHICLE
#
# INPUT
#
# (1) SOI MANEUVER
#
# (A) TIG TIME OF SOI MANEUVER
# (B) CENTANG ORBITAL CENTRAL ANGLE OF THE PASSIVE VEHICLE
# DURING TRANSFER FROM TIG TO TIME OF INTERCEPT
# (C) DELTAR THE DESIRED SEPARATION OF THE TWO VEHICLES
# SPECIFIED AS A DISTANCE ALONG THE PASSIVE VEHICLE
# ORBIT
# (D) OPTION EQUALS 1 FOR SOI
#
# (2) SOR MANEUVER
#
# (A) TIG TIME OF SOR MANEUVER
# (B) CENTANG AN OPTIONAL RESPECIFICATION OF 1 (B) ABOVE
# (C) OPTION EQUALS 2 FOR SOR
# (D) DELTTIME THE TIME REQUIRED TO TRAVERSE DELTA R WHEN
# TRAVELING AT A VELOCITY EQUAL TO THE HORIZONTAL
# VELOCITY OF THE PASSIVE VEHICLE - SAVED FROM
# SOI PHASE
# (E) TINT TIME OF INTERCEPT (SOI) - SAVED FROM SOI PHASE
#
# OUTPUT
#
# (1) TRKMKCNT NUMBER OF MARKS
# (2) TTOGO TIME TO GO
# (3) +MGA MIDDLE GIMBAL ANGLE
# (4) DSPTEM1 TIME OF INTERCEPT OF PASSIVE VEHICLE ORBIT
# (FOR SOI ONLY)
# (5) POSTTPI PERIGEE ALTITUDE OF ACTIVE VEHICLE ORBIT AFTER
# THE SOI (SOR) MANEUVER
# (6) DELVTPI MAGNITUDE OF DELTA V AT SOI (SOR) TIME
# (7) DELVTPF MAGNITUDE OF DELTA V AT INTERCEPT TIME
# (8) DELVLVC DELTA VELOCITY AT SOI (AND SOR) - LOCAL VERTICAL
# COORDINATES
#
# SUBROUTINES USED
#
# AVFLAGA
# AVFLAGP
# VNDSPLY
# BANKCALL
# GOFLASHR
# GOTOPOOH
# BLANKET
# ENDOFJOB
# PREC/TT
# SELECTMU
# INTRPVP
# MAINRTNE
BANK 04
SETLOC STBLEORB
BANK
EBANK= SUBEXIT
COUNT* $$/P3879
P38 TC BANKCALL
CADR AVFLAGA # THIS VEHICLE ACTIVE
TC +3
P78 TC BANKCALL
CADR AVFLAGP # OTHER VEHICLE ACTIVE
CAF V06N33SR # DISPLAY TIG
TC VNDSPLY
CAF V06N55SR # DISPLAY CENTANG
TCR BANKCALL
CADR GOFLASHR
TCF GOTOPOOH # TERMINATE
TCF +5 # PROCEED
TCF -5 # RECYCLE
CAF THREE # IMMEDIATE RETURN - BLANK R1, R2
TCR BLANKET
TCF ENDOFJOB
CAF FIVE
TS OPTION1
CAF ONE
TS OPTION2 # OPTION CODE IS SET TO 1
CAF V04N06SR # DISPLAY OPTION CODE - 1 = SOI, 2 = SOR
TCR BANKCALL
CADR GOFLASHR
TCF GOTOPOOH # TERMINATE
TCF +5 # PROCEED
TCF -5 # RECYCLE
CAF BIT3 # IMMEDIATE RETURN - BLANK R3
TCR BLANKET
TCF ENDOFJOB
TC INTPRET
SLOAD SR1
OPTION2
BHIZ DLOAD
OPTN1
TINT
STORE TINTSOI # STORE FOR SOR PHASE
CLRGO
OPTNSW # OPTNSW; ON = SOI, OFF = SOR
JUNCTN1
OPTN1 SET CALL # SOI
OPTNSW
PREC/TT
DAD
TIG
STORE TINT # TI = TIG + TF
STORE DSPTEM1
EXIT
CAF V06N57SR # DISPLAY DELTA R
TCR BANKCALL
CADR GOFLASHR
TCF GOTOPOOH # TERMINATE
TCF +5 # PROCEED
TCF -5 # RECYCLE
CAF SIX # IMMEDIATE RETURN - BLANK R2, R3
TCR BLANKET
TCF ENDOFJOB
+5 CAF V06N34SR # DISPLAY TIME OF INTERCEPT
TC VNDSPLY
TC INTPRET
JUNCTN1 CLEAR CALL
P39/79SW
SELECTMU # SELECT MU, CLEAR FINALFLG, GO TO VN1645
RECYCLE CALL
PREC/TT
BOFF DLOAD
OPTNSW
OPTN2
TINT
STCALL TDEC1 # PRECISION UPDATE PASSIVE VEHICLE TO
INTRPVP # INTERCEPT TIME
VLOAD UNIT
RATT # RP/(RP)
PDVL VXV
VATT
ABVAL NORM # (VP X RP/(RP))
X1
PDDL DDV
DELTAR
SL* # DELTA R / (VP X RP/RP)
0 -7,1
STCALL DELTTIME # DELTA T = (RP) DELTA R / (VP X RP)
JUNCTN2
OPTN2 DLOAD DAD
TINTSOI
T
STORE TINT # TI = TI + TF
JUNCTN2 DLOAD DSU
TINT
DELTTIME
STORE TARGTIME # TT = TI - DELTA T
# .... MAINRTNE ....
#
# SUBROUTINES USED
#
# S3435.25
# PERIAPO1
# SHIFTR1
# VNDSPLY
# BANKCALL
# GOFLASH
# GOTOPOOH
# VN1645
MAINRTNE STCALL TDEC1 # PRECISION UPDATE PASSIVE VEHICLE TO
INTRPVP # TARGET TIME
DLOAD
TIG
STORE INTIME
SSP VLOAD
NORMEX
TEST3979
RATT
CALL
S3435.25
TEST3979 BOFF BON
P39/79SW
MAINRTN1
FINALFLG
P39P79
SET
UPDATFLG
P39P79 EXIT
TC DSPLY81 # FOR P39 AND P79
MAINRTN1 VLOAD ABVAL
DELVEET3
STOVL DELVTPI # DELTA V
VPASS4
VSU ABVAL
VTPRIME
STOVL DELVTPF # DELTA V (FINAL) = V'T - VT
RACT3
PDVL CALL
VIPRIME
PERIAPO1 # GET PERIGEE ALTITUDE
CALL
SHIFTR1
STORE POSTTPI
BON SET
FINALFLG
DSPLY58
UPDATFLG
DSPLY58 EXIT
CAF V06N58SR # DISPLAY HP, DELTA V, DELTA V (FINAL)
TC VNDSPLY
DSPLY81 CAF V06N81SR # DISPLAY DELTA V (LV)
TC VNDSPLY
TC INTPRET
CLEAR VLOAD
XDELVFLG
DELVEET3
STCALL DELVSIN
VN1645 # DISPLAY TRKMKCNT, TTOGO, +MGA
BON GOTO
P39/79SW
P39/P79B
RECYCLE
# STABLE ORBIT MIDCOURSE PROGRAM (P39 AND P79)
#
# MOD NO -1 LOG SECTION - STABLE ORBIT - P38-P39
# MOD BY RUDNICKI.S DATE 25JAN68
#
# FUNCTIONAL DESCRIPTION
#
# P39 AND P79 CALCULATE THE REQUIRED DELTA V AND OTHER INITIAL
# CONDITIONS REQUIRED BY THE AGC TO MAKE A MIDCOURSE CORRECTION
# MANEUVER AFTER COMPLETING THE SOI MANEUVER BUT BEFORE MAKING
# THE SOR MANEUVER
#
# CALLING SEQUENCE
#
# ASTRONAUT REQUEST THRU DSKY
#
# V37E39E IF THIS VEHICLE IS ACTIVE VEHICLE
# V37E79E IF OTHER VEHICLE IS ACTIVE VEHICLE
#
# INPUT
#
# (1) TPASS4 TIME OF INTERCEPT - SAVED FROM P38/P78
# (2) TARGTIME TIME THAT PASSIVE VEHICLE IS AT INTERCEPT POINT -
# SAVED FROM P38/P78
#
# OUTPUT
#
# (1) TRKMKCNT NUMBER OF MARKS
# (2) TTOGO TIME TO GO
# (3) +MGA MIDDLE GIMBAL ANGLE
# (4) DELVLVC DELTA VELOCITY AT MID - LOCAL VERTICAL COORDINATES
#
# SUBROUTINES USED
#
# AVFLAGA
# AVFLAGP
# LOADTIME
# SELECTMU
# PRECSET
# S34/35.1
# MAINRTNE
P39 TC BANKCALL
CADR AVFLAGA # THIS VEHICLE ACTIVE
EXTEND
DCA ATIGINC
TC P39/P79A
P79 TC BANKCALL
CADR AVFLAGP # OTHER VEHICLE ACTIVE
EXTEND
DCA PTIGINC
P39/P79A DXCH KT # TIME TO PREPARE FOR BURN
TC INTPRET
RTB DAD
LOADTIME
KT
STCALL TIG
SELECTMU # SELECT MU, CLEAR FINALFLG, GO TO VN1645
P39/P79C DLOAD SET
TIG
P39/79SW
STCALL TDEC1 # PRECISION UPDATE ACTIVE AND PASSIVE
PRECSET # VEHICLES TO TIG
CALL
S34/35.1 # GET UNIT NORMAL
DLOAD GOTO
TARGTIME
MAINRTNE # CALCULATE DELTA V AND DELTA V (LV)
P39/P79B RTB DAD
LOADTIME
KT
STCALL TIG # TIG = T (PRESENT) + PREPARATION TIME
P39/P79C
# .... PREC/TT ....
# SUBROUTINES USED
#
# PRECSET
# TIMETHET
# S34/35.1
PREC/TT STQ DLOAD
RTRN
TIG
STCALL TDEC1 # PRECISION UPDATE ACTIVE AND PASSIVE
PRECSET # VEHICLES TO TIG
VLOAD VSR*
RPASS3
0,2
STODL RVEC
CENTANG
PUSH COS
STODL CSTH
SIN SET
RVSW
STOVL SNTH
VPASS3
VSR*
0,2
STCALL VVEC # GET TRANSFER TIME BASED ON CENTANG OF
TIMETHET # PASSIVE VEHICLE
CALL
S34/35.1 # GET UNIT NORMAL
DLOAD GOTO
T
RTRN
# .... INTRPVP ....
# SUBROUTINES USED
#
# CSMPREC
# LEMPREC
INTRPVP STQ BOFF # PRECISION UPDATE PASSIVE VEHICLE TO
RTRN # TDEC1
AVFLAG
OTHERV
CALL
CSMPREC
GOTO
RTRN
OTHERV CALL
LEMPREC
GOTO
RTRN
# .... VNDSPLY ....
# SUBROUTINES USED
#
# BANKCALL
# GOFLASH
# GOTOPOOH
VNDSPLY EXTEND # FLASH DISPLAY
QXCH RTRN
TS VERBNOUN
CA VERBNOUN
TCR BANKCALL
CADR GOFLASH
TCF GOTOPOOH # TERMINATE
TC RTRN # PROCEED
TCF -5 # RECYCLE
V06N33SR VN 0633
V06N55SR VN 0655
V04N06SR VN 0406
V06N57SR VN 0657
V06N34SR VN 0634
V06N58SR VN 0658
V06N81SR VN 0681
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