Revision feabfcc6514f3fb411605a6982bc539a220b8fe6 authored by Mike Stewart on 07 August 2021, 22:38:19 UTC, committed by Mike Stewart on 07 August 2021, 22:38:19 UTC
1 parent 9587743
ORBITAL_INTEGRATION_FOR_501.agc
### FILE="Main.annotation"
## Copyright: Public domain.
## Filename: ORBITAL_INTEGRATION_FOR_501.agc
## Purpose: Part of the source code for Solarium build 55. This
## is for the Command Module's (CM) Apollo Guidance
## Computer (AGC), for Apollo 6.
## Assembler: yaYUL --block1
## Contact: Jim Lawton <jim DOT lawton AT gmail DOT com>
## Website: www.ibiblio.org/apollo/index.html
## Page Scans: www.ibiblio.org/apollo/ScansForConversion/Solarium055/
## Mod history: 2009-09-22 JL Created.
## 2009-09-22 JL Fixed typo.
## 2009-10-30 JL Fixed filename comment.
## 2016-12-28 RSB Proofed comment text using octopus/ProoferComments,
## and fixed errors found.
## Page 326
SETLOC 60000
AVETOMD1 AXC,1 2
ITA SXA,1
ITC
1
MIDEXIT
MEASMODE
AVETOMID
AVETOMD2 AXC,1 1
ITA SXA,1
2
MIDEXIT
MEASMODE
AVETOMID VMOVE 6
AXT,1 SXA,1
AXT,1 SXA,1
AXT,1 SXA,1
AXT,1 SXA,1
AXT,1 SXA,1
AXT,1 SXA,1
ZEROVEC
0
WMATFLAG # TURN OFF WMATRIX INTEGRATION.
RSCALE
SCALER # SET SCALE OF POSITION.
4
SCALDELT # ALSO DEVIATION.
18D
SCALEDT # AND TIME STEP.
EARTHTAB
PBODY
TESTTET
STEPEXIT
STORE TDELTAV # ZERO POSITION DEVIATION.
NOLOD 0
STORE TNUV # ALSO VELOCITY.
NOLOD 0 # AND TIME SINCE RECTIFICATION, TIME,
STORE TC # AND KEPLER X.
## Page 327
AXT,1 1
AST,1
12D
6
RVTOMID VXSC* 1 # TRANSFORM POSITION AND VELOCITY TO
VXM VSLT
RRECT +12D,1
SCLRAVMD +12D,1
REFSMMAT
2
STORE RRECT +12D,1
NOLOD 0
STORE RCV +12D,1
TIX,1 0
RVTOMID
DMOVE 0
TAVEGON
STORE TDEC
## Page 328
TESTTET EXIT 0 # FOR DUMP ONLY
TC INTPRET
LXC,1 1
AST,1 TIX,1
MEASMODE
1
+3
ITC 0
+4
TEST 0
UPDATFLG
NOSTATE
STZ 0
OVFIND
DSU 2
RTB TSLT
DDV
TDEC
TET
SGNAGREE
11D
EARTHTAB
STORE DT/2
BOV 3
ABS DSU
BMN DAD
DSU BMN
USEMAXDT
DT/2
DT/2MIN
DODCSION
DT/2MIN
DT/2MAX
TIMESTEP
USEMAXDT DMOVE 1
SIGN
DT/2MAX
DT/2
STORE DT/2
ITC 0
TIMESTEP
## Page 329
DODCSION ITC 0 # RECTIFY TO OBTAIN FULL POSITION
RECTIFY # AND VELOCUTY VECTORS.
SMOVE 1
BMN BZE
MEASMODE # TEST MEASMODE.
AVEGON # MEASMODE = -1.
IGN-4SEC # MEASMODE = 0.
AXT,1 1 # MEASMODE = +1.
AST,1
12D
6
RVTOAVE VXSC* 1 # TRANSFORM POSITION AND VELOCITY VECTORS
MXV VSLT
RRECT +12D,1
SCLRMDAV +12D,1
REFSMMAT
1
STORE RIGNTION +12D,1
VXSC* 1
MXV VSLT
RAVEGON +12D,1
SCLRMDAV +12D,1
REFSMMAT
1
STORE RAVEGON +12D,1
TIX,1 0
RVTOAVE
ITCI 0
MIDEXIT # RETURN.
## Page 330
AVEGON VMOVE 0 # SAVE POSITION AND VELOCITY AT
RRECT # AVERAGE G ON TIME.
STORE RAVEGON
VMOVE 0
VRECT
STORE VAVEGON
LXC,1 1
AST,1 TIX,1
MEASMODE
1
RVTOAVE -4
DAD 1
AXT,1 SXA,1
TDEC
12M56S # 12 MINUTES, 56 SECS
0
MEASMODE # MAKE MEASMODE 0.
STORE TDEC
ITC 0
TESTTET # CONTINUE INTEGRATION.
IGN-4SEC VXSC 1 # TRANSFORM AND SAVE POSITION ONLY
MXV VSLT
RRECT
SCLRMDAV
REFSMMAT
1
STORE RIG-4SEC
DAD 1
AXT,1 SXA,1
TDEC
4SECONDS # ADD 4 SECONDS TO DECISION TIME.
1
MEASMODE # MAKE MEASMODE +1.
STORE TDEC
ITC 0
TESTTET # DO LAST INTEGRATION STEP.
## Page 331
12M56S 2DEC 77600 # 12 MINUTES, 56 SECS
4SECONDS 2DEC 400
DT/2MIN 2DEC .000024
DT/2MAX 2DEC .65027077 B-1 # .075 HOUR MAXIMUM TIME STEP
INITMSK OCT 30000
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