(This page is in the process of being superseded by our hopefully much-improved Document Library page.  While this page will remain available indefinitely, I wouldn't expect it to be updated.)

Here you'll find a collection of all the AGC, AGS, LVDC, and Gemini spacecraft computer documentation and software that I've managed to find whilst working on Virtual AGC.  Every document on this page is archived here at Virtual AGC, regardless of whether it originated here or not.  In the early days I used to include only material I uncovered by my own efforts, but there have increasingly been contributions by numerous correspondents, including some of the original AGC developers, so it has become a community effort. 

And there's material here that has been duplicated from other Apollo-centric websites for your convenience; see the FAQ page for a list of the fine Apollo and Gemini websites I raided.  The reason for that is that I figure it's worthwhile to provide one-stop-shopping for all of your Apollo and Gemini computing-system documentation needs.  In recent years, admittedly, such raiding has seldom been necessary, because most AGC material seems to gravitate here naturally now.  Regardless, even back when it was more necessary, I chose to duplicate only scanned or photographic images of the original documents.  On some sites, notably the Apollo Flight Journal and Apollo Lunar Surface Journal, great pains have apparently been taken to produce HTML forms of the documents.  Those improved formulations have not been duplicated here, so you will have to visit those sites to use those improved versions.

Many documents acquired relatively recently are stored here locally on the Virtual AGC website in a lower-quality, reduced-filesize version, while the highest-quality scans we have are available instead at our Internet Archive site.  Sometimes we explicitly note the links to the higher-quality versions below, and sometimes not, but if you happen to need them for some reason, it's worth heading over to our Internet Archive site and searching for them. 

AGC software-listings and digital-simulation documents are not listed on this page, and you should instead refer to our Colossus and Luminary pages for them.

Note:  Newest additions to the library (currently, June 2021 or later) are marked with the icon .

Document categories

AGC-related presentations

Various presentations presented at the MAPLD '04 conference, by AGC developers and other knowledgeable folks

 AGC software manuals and listings

AGC Users' Guides

This section pertains to a document (E-2448) called "Users' Guide to Apollo GN&CS Major Modes and Routines", presented in several different revisions.  While the document itself purports to be general purpose in nature rather than mission-specific, it was nevertheless maintained to remain current, and therefore can be roughly matched (from publication dates and internal information) particularly-relevant missions.

Guidance System Operations Plans (GSOP)

AGC quick-reference cards or data cards

AGC pad loads

Other sources referencing the erasable loads include:

AGC Erasable Memory Programs (EMPs)

TBD

AGC Electrical and Mechanical design

The principal references for AGC electrical schematics and mechanical drawings on this website are now the following two pages:

However, below are various related (and sometimes overlapping) supplemental materials ... or just related stuff I couldn't figure out where else to put:

See also: System Handbooks and the other AC/Delco documents in the "Miscellaneous" section below.

AGC Information Series

"Published to inform members of the technical staff at MIT and Raytheon about the AGC and the Apollo G & N system", apparently with emphasis on the electronics.

Space Guidance Analysis (SGA) memos

If you are interested in the mathematical underpinnings of the AGC software, then this amazing series of memos from MIT's Instrumentation Lab is the place to look.  The memos are in roughly chronological order.  It is very interesting to reflect on the fact that these mathematical memos are often written by the very same people whose names you find as authors in the software.  The AGC software was written in a time ... or at least a place ... where software was regarded as the expression of mathematical knowledge as opposed to being a mere exercise in the expert employment of programming languages and tools as it is today.  It is interesting also to reflect on the nature of the software this approach produced.

Apollo Project and Engineering Memoranda

A dozen or so of the memos in this section were duplicated elsewhere in library, long before I recognized "Apollo project memoranda" as being a distinct document category.  Oops, my mistake!  On the other hand, you'll notice that the numbering of the memos is what you might call "distinctively different"; don't blame me for that, I'm just the messenger.  Perhaps the numbering scheme was too boring, and so they changed it every year.  Besides that, some of the memos are self-described as "Apollo Project Memoranda", while others describe themselves as "Apollo Engineering Memoranda" though assigning themselves an "AP-M" memo number; perhaps this was an evolution in the naming over time, or perhaps I'm still intermixing two or more separate categories of memos.  At this point, it's just a guess, I'm afraid.  At any rate, I've organized the memos by date rather than by memo number.

Digital Development Memos

These memos primarily relate to the electrical design of the AGC.

Also, here are a couple of Electronic Design Group Memoranda, which I throw in as a bonus:

Inertial Sub-System (I.S.S.) Memos

XDE Notes

These are notes from AC Spark Plug Division, commenting on topics peripheral to the AGC, such as ground-support equipment.

Digital Group Memos

Mission Techniques Memos

System Test Group (STG) Memos

AGC/AGS Software Requirements

LUMINARY Memos, Anomalies, PCRs, and PCNs

The "LUMINARY Memos" are memos from the MIT Instrumentation Lab dealing with issues of Luminary software development. 

Of particular interest, if you're concerned with the evolution of the AGC software, are the many memos, software-anomaly reports, program-change requests (PCRs), and program-change notices (PCNs) used to document the changes of the Luminary code from one revision to the next.  In theory, if you had all of them, you could use them to document the complete evolution of Luminary, or at any rate from LUMINARY 4 (memo #22) through LUMINARY 209 (memo #205).

But back to the memos.  There are over 250 known LUMINARY Memos, of which we've gotten the majority from Don Eyles's personal collection.  Here at the Virtual AGC site we are providing these memos in a convenient, readable quality, but higher-quality archival versions for many of them are available in our Virtual AGC collection at the Internet Archive.  In the table below, the lines which are grayed-out relate to memos about which we have some information but not the actual memos themselves. 

LUMINARY Memo #

Date

Author

Subject

1

11/07/67

J. Rhode

Nothing's Here to Stay — Not Even KKK

2

11/15/67

Steve Copps

Tiger Team

3

11/13/67

George Cherry

Minutes of MSC LM Digital Autopilot Design Review

4

11/29/67

George Cherry

LGC Computer Program Execution Time During Lunar Landing

5

11/27/67

J. Saponaro

Synchronization of W-Matix and State Vector

6

01/12/68

George Cherry

Summary of Information from Level III Testing Status Reports for LUMINARY Development Plan, Week of 8 January 1968

7

01/16/68

George Cherry

LUMINARY GSOP Chapter 5 and Chapter 4 Review

8

01/24/68

John Vella

Recent Changes to PINBALL Affecting DSKY Operation

9

02/06/68

A. Martorano

Minutes of PRC Meeting 2 February 1968

10

02/09/68

George Cherry

RCS Jet Firings During Gyro Torquing in P52 on SUNDANCE

11

02/12/68

J. S. Miller

Inhibition of DAP Operation in SUNDANCE and LUMINARY

12

02/13/68

S. Davis

Hybrid Facility Procedures

13

02/26/68

George Cherry

Deadband Setting PCR #86

14

03/04/68

Alex Kosmala

Key Release Light

15

03/08/68

N. Neville

SETUP504

16

03/14/68

Alex Kosmala

ABORT

17

03/15/68

J. Saponaro

AGC Time Dependent Constants

18

03/??/68

R. Tinkham

LUMINARY Downlist

19

03/04/68

Allan Klumpp

Comparison of Body Drive & Gimbal Drive FINDCDUW Routines

20

04/01/68

Jim Kernan

SUNDANCE Revisions 280, 281 and 282 and LUMINARY Revision 0

21

04/08/68

Craig Schulenberg

LUMINARY Revisions 1, 2 and 3

22

04/15/68

Craig Schulenberg

LUMINARY Revisions 4, 5 and 6

23

04/22/68

Craig Schulenberg

LUMINARY Revisions 7 and 8

24

04/24/68

C. Braunhardt

Standards for Verification Plans

25

04/30/68

Craig Schulenberg

LUMINARY Revisions 9, 10 and 11

26

05/13/68

Don Eyles

RTB

27

05/10/68

Allan Klumpp

FINDCDUW Guidance Autopiliot Interface Routine

27 rev 1
09/26/68
Allan Klumpp
FINDCDUW Guidance Autopiliot Interface Routine

28

05/14/68

Craig Schulenberg

LUMINARY Revisions 12 - 16

29

06/06/68

Craig Schulenberg

LUMINARY Revisions 17 and 18

30

06/07/68

Jim Kernan & Schulenberg

LUMINARY Level 4 Test Plan

31

06/12/68

Craig Schulenberg

LUMINARY Revisions 19 - 26

32

06/24/68

Peter Weissman

Undocumented Aspects of R03 (Verb 48)

33

06/24/68

George Cherry

Z-Axis Tracking in LUMINARY

34

07/15/68

Craig Schulenberg

LUMINARY Revisions 27 - 34

35

07/30/68

George Cherry

Don't Wrap Rendezvous Radar Around the Axle

36

07/30/68

George Cherry

Computing the Lag Angles which Prevent Beginning and Supervised DAP Maneuvers

37

08/05/68

Craig Schulenberg

LUMINARY Revisions 35 - 38

38

08/06/68

Craig Work

Restrictions to R03 (Verb 48) Inputs

39

08/27/68

George Cherry

Scheduling Proposed Modifications to the LUMINARY Digital Autopilot

40

09/05/68

Craig Schulenberg

LUMINARY Revisions 39 - 43

41

08/28/68

A. Laats & J. Shillingford

LUMINARY Level 3 Verification Plan

42

09/12/68

George Cherry

LUMINARY Program Changes Suggested at MSC/MIT Lunar Landing Co-Ordidation Meeting Held at MIT on 9/12/68

43

09/16/68

George Cherry

Implementation of One-Phase Descent Guidance Logic PCR

44

09/19/68

Don Eyles

Implementation of "One-Phase" Guidance in the AGC

45

09/24/68

Don Eyles

New Landing Initialization

46

10/15/68

George Cherry

LUMINARY Level IV Test Data Requirements for Pre-FACI Review

47

10/29/68

George Cherry

DPS and APS Engine Data

48

10/24/68

J. Connor

R65 Edit

49

11/01/68

Craig Schulenberg

LUMINARY Revisions 44 - 47

50

11/02/68

Craig Schulenberg

LUMINARY Revisions 48- 50

51

11/02/68

Craig Schulenberg

LUMINARY Revisions 51 - 53

52

11/03/68

Craig Schulenberg

LUMINARY Revisions 54 - 60

53

11/12/68

George Cherry

Final LUMINARY Tree-Shaking

54

11/18/68

George Cherry

LUMINARY Pre-Release Activities

55

12/04/68

Craig Schulenberg

LUMINARY Revisions 61

56

12/04/68

George Cherry

DANCE & LUMINARY Program Activity Calendar

57

12/09/68

George Cherry

Report on LUMINARY FACI

58

12/17/68

Craig Schulenberg

LUMINARY Revisions 62 - 64

59

01/03/69

Craig Work

SUNDANCE Edits for DAP and for Powered Descent

60

01/09/69

Jim Kernan, Peter Volante

LUMINARY Level 5 Test Plan

61

01/14/69

Craig Schulenberg

LUMINARY Revisions 65 - 69

62

01/24/69

George Cherry

A Set of Lunar Landing Guidance Equations which Compensate for Computation, Throttle, and Attitude-Control Lags

63

01/27/69

George Cherry

A Derivation of the Improved Lunar Landing Guidance Equations

64

02/04/69

Jim Kernan

Verb 85 — RR Antenna Line-of-Sight Display

65

02/07/69

George Cherry

A Variable Time Constant Velocity-Nulling Guidance Law

66

02/12/69

George Cherry

Aborts from the Lunar Landing & Nominal Lunar Ascent Targetting

67

02/17/69

Craig Schulenberg

LUMINARY Revisions 70 - 79

68

02/20/69

George Cherry

Lunar Landing Guidance Equations Program Alarms

69

03/10/69

Craig Work

LUMINARY 1A Edits for DAP and for Powered Descent

70

03/13/69

Joe Saponaro

Accuracy of Verb 83 (Range, Range Rate, Theta Display)

71

03/14/69

Peter Volante

LUMINARY TEDITS

72


Bill Ostanek

Use of V96 During State Vector / W Matrix Synchronization

73

03/27/69

Craig Schulenberg

LUMINARY Revisions 80 - 92

74

03/31/69

Peter Adler

Response to V99 & V97 in LUMINARY

75

04/01/69

George Cherry

R-2 Lunar Potential Model Added to LUM

76

04/01/69

Don Eyles

Variable Gains in Guidance Frame Erection

77

04/03/69

George Cherry

Let's Continue the LUMINARY 1A Test Results Review

78

04/10/69

Craig Schulenberg

LUMINARY Revisions 93 - 96

79

04/15/69

Jane Goode

Computation Cycle Timing in TPI, TPM Programs

80

04/24/69

Don Eyles

Abnormal Exit from Ignition Algorithm

81

04/28/69

Don Eyles

Landing Dependence on Platform Alignment

82

05/08/69

J.E. Jones

Suggestions for LUMINARY 1A Simulations

83

05/19/69

Jim Kernan

LUMINARY Revision 98

84

05/21/69

Don Eyles

Ignition Algorithm Convergence

85

05/21/69

Jim Kernan

LUMINARY Revision 99

86

05/21/69

Eugene Muller, Peter Kachmar

Affect of Radar (or the HF Ranging) AGC Interface Problem on F Mission Rendezvous Sequence

87

05/28/69

George Cherry

George Lowe's Decision at CCB Regarding LGC Radar Interface Problem

88

06/05/69

Don Eyles

Anomaly 64

89

06/23/69

Peter Adler, Dana Densmore

A Metaphysic of Downrupts

90 rev 1

06/11/70

Jenny Flaherty

Memo Indexes

91

07/07/69

Craig Schulenberg

LUMINARY Revisions 100 - 105

92

07/10/69

Craig Schulenberg

LUMINARY Revisions 106

93

07/14/69

J.E. Jones

Intermediate Throttle-up of LM DPS During CSM-docked Burn

94

07/14/69

Bruce McCoy

Revision 107

95

07/09/69

Robert Covelli

Landing Radar Orientation

96

07/14/69

Bruce McCoy

Level 3 Test Plan for LUMINARY 1B

97

07/16/69

Don Eyles

Anomaly 79 Test Data

98

07/22/69

Margaret Hamilton

Review of Reduction of Coding Approval Procedures

99

07/23/69

George Cherry

LUMINARY Memo #96

100

07/31/69

Craig Schulenberg

Brief Summary of Verb, Noun, Alarm, Flagword & Downlist Changes between LUMINARY 1A & LUMINARY 1B (Rev. 111)

101

08/04/69

Bruce McCoy, George Cherry

Level III/IV Tests Review

102

08/06/69

George Cherry

Some Results of the Apollo 12 Pinpoint Lunar Landing Data Priority Meeting

103

08/06/69

Craig Schulenberg

LUMINARY Revisions 108 - 113

104

08/08/69

David Moore, Don Eyles

LUMINARY 1B — Level 4 Lunar Landing Test Plan

105

08/14/69

Al Engel, Bruce McCoy

H Mission RTCC Compatibility Testing, Test Plan & Schedule (Preliminary)

106

08/14/69

Al Engel, Bruce McCoy

RTCC Compatibility Testing at MIT, Current Understanding of Scope, Responsibilities, etc.

107

08/20/69

Craig Schulenberg

LUMINARY Revisions 114 - 116

108

08/22/69

Bruce McCoy

LUMINARY 1B is Revision 116

109

09/09/69

Bruce McCoy

Work Around for P22 Bug

110

09/10/69

Bill Ostanek

Bad Other Vehicle State Vector

111

09/19/69

Bruce McCoy

Level 6

112

09/22/69

M. Albert

RTCC Compatable Uplink Edit

113

10/02/69

S. David

Configuration Control of RTCC Digital Environment

114

10/07/69

Russ Larson

Proposed Contents of LUMINARY 1C

115

10/09/69

Don Eyles

Notes on Implementation of Delta-Guidance

116

10/22/69

Larry Berman

ACB #L5/120 — Operation of Rotation Control

117

10/24/69

George Kalan

Special Crew Procedures Necessary for Controlling the CSM-Docked Configuration with the LEM DAP

118

10/27/69

Don Eyles

Landing Changes Put into LUMINARY 1C

119

10/30/69

Harry McOuat

New LOSSEM Numbers

120

11/05/69

Russ Larson

C13STALL

121

11/05/69

Bruce McCoy

What is LUMINARY 1C

122

11/06/69

Dana Densmore

LUMINARY Revisions 117 - 120

123

11/18/69

Don Eyles

More About Delta-Guidance

124

11/11/69

Dana Densmore

LUMINARY Revisions 121 - 130

125

11/21/69

Donald S. Reinke

Work-around for P32 bomb-outs due to insufficient post-CSI or post-CDH pericenter (Alarm codes 601 and 602, respectively)

126

12/02/69

Don Eyles

Delta-Guidance

127

12/03/69

Bruce McCoy

Re-release of LUMINARY 1C

128

12/03/69

Bruce McCoy

Level 6 Test Plan for LUMINARY 1C

129

12/05/69

Dana Densmore

LUMINARY Revisions 131

130

12/15/69

Russ Larson

LUMINARY 1C Program Notes

131

01/02/70

Dana Densmore

LUMINARY Revisions 132 - 135

132

01/08/70

Ken Greene

Definition and Usages of PCRs, PCNs, Anomalies & ACBs

133

01/09/70

Peter Volante, G. Dunbar

Implementation of PCR 287

133 rev 1
05/04/70

Peter Volante, G. Dunbar

Implementation of PCR 287

134

01/19/70

Dana Densmore

LUMINARY Revisions 136 - 139

135

01/23/70

Robert Covelli

Downrupt Losses During Periods of High Computer Activity Programs

136

01/29/70

Dana Densmore

LUMINARY Revisions 140 - 143

137

01/30/70

Russ Larson

LUM 131A REV 3 Testing

138

02/14/70

Don Eyles

Variable Guidance Period Servicer

138 rev 1
03/06/70
Don Eyles Variable Guidance Period Servicer

139

03/03/70

Don Eyles

Description of Variable Servicer

140

03/04/70

Allan Klumpp

A Collection of Known Manifestatons of Time Loss in Luminary Revision 131 and LM131 Revision 001 — Suggested Work-Around Procedures

141

03/10/70

Larry Berman

Replacement of LOGSUB in LUMINARY from Don Eyles's collection or from Russ Larson

142

03/18/70

Dana Densmore

LUMINARY Revisions 144 - 147

143

03/24/70

Allan Klumpp

Automatic P66

144

04/06/70

Don Eyles

Variable Servicer Tests

145

05/05/70

Dana Densmore

LUMINARY Revisions 148 - 151

146

05/??/70

Robert Covelli

The New R12

147

05/05/70

Allan Klumpp, Don Eyles, Bruce McCoy

Lunar Terrain Model

148

05/11/70

Bruce McCoy

Call It LUMINARY 1D from Don Eyles's collection or from Russ Larson

149

05/13/70

Don Eyles

Further Tests of ZERLINA

150

05/15/70

Dana Densmore

LUMINARY Revisions 152 - 154

151

05/19/70

Dana Densmore

LUMINARY Revisions 155 - 158

152

05/21/70

Don Eyles

Cyclical PIPA Reader

153

05/26/70

Sharon Albert

Variable Servicer Tests

154

06/01/70

Larry Berman

Luminary Dev. Memo #141 — Replacement of LOGSUB

155

06/01/70

Bruce McCoy

LUMINARY 1D Re-Release from Don Eyles's collection or from Russ Larson

156

06/09/70

Dana Densmore

LUMINARY Revisions 159 - 163

157

06/10/70

Dana Densmore

LUMINARY Revisions 164 - 167

158

06/18/70

Bruce McCoy, Dana Densmore

Revision 163 - 173

159

07/10/70

Russ Larson

Luminary 1D Program Notes

160

07/16/70

David Moore

Descent Trajectory Monitor Package

161

07/17/70

Don Eyles

ZERLINA 31

162

07/20/70

Don Eyles

A New Landing Analog Displays Routine

163

07/21/70

Don Eyles

Z Lives

164

07/22/70

Phyllis Rye, Peter Peck

Account Numbers

165

07/28/70

Don Eyles

The Return of R10FLAG

166

07/23/70

David Moore

DVTOTAL vs. VGDISP Discrepancy in Powered Flight

167

08/17/70

Bruce McCoy, Phyllis Rye

Luminary 1D: Which One, What Kind, How Many? from Don Eyles's collection or from Russ Larson

167 rev 1

09/17/70

Bruce McCoy, Phyllis Rye

Luminary 1D: Which One, What Kind, How Many?

168

08/18/70

Robert Covelli

"Erasable Memory Program" for a Guided RCS Burn

169

09/01/70

Harry McOuat

Effect of LSPOS "Burn Skinny" in Luminary-1D

170

09/15/70

Bruce McCoy

Level 6 Testing for Apollo 14

171

09/16/70

Don Eyles

Introduction to ZERLINA 50

172

10/11/70

Dana Densmore

LUMINARY Revisions 179 & 180

173

10/12/70

Dana Densmore

LUMINARY Revision 181

174

10/09/70

Bill Robertson

Summary of Program Change Requests Involving Astrodynamic Coordinate Systems, Ephemerides and Orientations, etc.

175

10/13/70

Dana Densmore

LUMINARY Revision 182

176

10/14/70

Dana Densmore

LUMINARY Revision 183

177

10/22/70

Don Eyles

ZERLINA 56

178

10/20/70

Peter Weissman

Inputs to LM DAP During Descent and Ascent

179

10/27/70

Dana Densmore

LUMINARY Revisions 184 & 185

180 rev 1

12/15/70

David Moore

Apollo 14 LM De-Orbit Test

181

12/15/70

Don Millard

IMU Alignments and LUMINARY 202

182

12/08/70

Dana Densmore

LUMINARY Revision 186

183

12/09/70

Dana Densmore

LUMINARY Revision 187

184

12/15/70

Dana Densmore

LUMINARY Revisions 188 - 190

185

12/17/70

Dana Densmore

LUMINARY Revision 191

186

12/22/70

David Moore

APS Impulse Burn for APOLLO 14

187

12/18/70

Dana Densmore

LUMINARY Revision 192

188

12/20/70

Dana Densmore

LUMINARY Revision 193

189

12/28/70

Dana Densmore

LUMINARY Revision 194

190

12/29/70

Dana Densmore

LUMINARY Revision 195

191

01/04/71

Harry McOuat

Fixed memory hardware related constants in Luminary 1D or here

192

01/05/71

Dana Densmore

LUMINARY Revision 196

193

01/08/71

Dana Densmore

LUMINARY Revisions 197, 198, 199

194

01/22/71

Allan Klumpp

Analysis of the Yaw Divergence at P64 Terminus

195

01/11/71

Dana Densmore

LUMINARY Revision 200

196

01/13/71

Dana Densmore

LUMINARY Revision 201 & 202

197

01/15/71

Dana Densmore

Luminary Revision 203

198

01/29/71

Craig Work, Peter Weissman

DAP performance in Apollo 14 Level 6 tests

199

02/12/71

David Moore

P99 — Erasable Memory Program for a Guided RCS Burn — Luminary 1E

200

02/22/71

V. Dunbar, Peter Volante

Implementation and Testing of PCR 324, PGNCS/AGS RR Data Transfer

201

02/16/71

Dana Densmore

DOWNRUPT SEQUENCING, LOST DOWNRUPTS, AND IMPAIRED DOWNLINK INFORMATION

202

02/16/71

Dana Densmore

Luminary Revision 204

203

02/23/71

Craig Work, Peter Weissman

Guidance and Contol Stability Tests of LUMINARY 1E

204

02/24/71

Dana Densmore

Luminary Revision 205

205

02/26/71

Dana Densmore

Luminary Revisions 206, 207, 208 and 209

206

03/09/71

Peter Weissman

Attitude Error Analysis in Special FACI APS Tests

207

03/17/71

David Moore

Post-FACI Luminary 1E Tests for R40, Engine-Fail Routine

208

03/16/71

Allan Klumpp

Apollo 14 Descent Simulation Dispersions: Terrain Model Mismatch Aggravates Drooping Trajectories in P64 and Low Descent Rate in P66

209

03/23/71

Peter Weissman

Update to Luminary Memo 178, "Inputs to LM DAP During Descent and Ascent"

210

03/23/71

Peter Volante, Bill Ostanek

Testing on Non Sign Agreement in TEPHEM in Apollo 14

211 rev 1

04/28/71

David Moore

"Erasable Memory Program" for a guided RCS burn (for Luminary 1E).  See also: "Comments on LM P99 Information in Luminary Memo #211"

212

03/29/71

Larry Berman

Effects of Delayed Tipover on Ascent Trajectories

213

03/31/71

Craig Work

Guidance and Control Stability Tests of LUMINARY 1E, Part 2

214 rev 1

04/06/71

Luminary Test Group

Level 6 Test Description for Luminary 1E

215

04/20/71

William Robertson

Limitations in the Astrodynamic Orientation and Ephemeris Routines

216

04/23/71

Craig Schulenberg, Peter Weissman

Impact of PCR 1107 (Abort Bit Backup) on Apollo 15 Abort Procedures

217

05/06/71

Russ Larson

Luminary 1E Program Notes

218

05/19/71

David Moore

Apollo 15 LM De-Orbit Performance Test

219

05/26/71

Craig Schulenberg

Descent Abort Procedures for Apollo 15

220

06/04/71

Craig Schulenberg

Erasable Memory Program for LUMINARY Rev. 210 to Provide Backup for DSKY Keys

221

07/12/71

Craig Work

DAP performance in the Apollo 15 Level 6 Tests

222

06/15/71

Luminary Test Group

Summary of Level 6 Test Results for LUMINARY 1E or here

223

06/17/71

Craig Schulenberg

Correction to Luminary Memo #220, "Erasable Memory Program for LUMINARY Rev. 210 to Provide Backup for DSKY Keys"

224

06/22/71

Craig Schulenberg, Phyllis Rye

Revision 1 of Erasable Memory Program for Backup for DSKY Keys

225

07/08/71

Peter Volante

Failure Protection of the PGNCS/AGS RR Data Transfer

227

07/13/71

Luminary Test Group

Level 6 Test of DSKY Keystroke Backup Erasable Progeram for LUMINARY 1E

228

07/21/71

David Moore, Peter Volante

Using P99 LM Deorbit Erasable Program in Earth Orbit (with full DPS/APS configuration)

229

07/15/71

David Moore, Craig Work, Peter Weissman

Post-FSRR (Luminary 1E) Docked DPS Burns

230

09/10/71

Larry Berman

EFFECT ON ASCENT OF INCORRECT TIME IN AGC

231

11/08/71

Don Millard

Level 6 Test Description for Mission 16 (PRELIMINARY)

232

11/16/71

Don Eyles

Low Thrust Landings

233

11/23/71

Margaret Hamilton

EMPs

234

11/30/71

Bruce McCoy, Don Millard

EMP Control Procedures — Final Iteration

235 rev 1

02/22/72

Don Eyles

Tentative EMP for Broken CDUX

236

12/23/71

Larry Berman

Crew Corrections for Cross Range Error due to Uncompensated Orbit Precession

239

02/22/72

Don Eyles

EMPs to Display H and H-dot on the DSKY

240

03/02/72

Luminary Test Group

Luminary Level 6 Test Results for Mission 16

244

04/18/72

Don Eyles

EMP for P47 Ascent

247

09/01/72

Don Millard

Level 6 Test Description for Mission 17 (PRELIMINARY)

250

10/20/72

Luminary Test Group

Luminary Level 6 Test Results for Mission 17

252

11/20/72

Don Eyles

EMP to Convert a Bad HMEAS

339
04/14/72 Don Eyles Latest EMP 103B
In addition to the "official" memos above that are explicitly marked internally as "LUMINARY memo #N", we also have numerous other memos of a very similar nature which are not explicitly marked in that way.   Many are internal, though some are from external sources such as Grumman Aerospace Corporation (GAEC) or TRW.  For lack of a better way to characterize those, here are a bunch of them, in roughly chronological order.  Except as otherwise noted, the documents linked in the table below are all reduced-size PDFs for faster download, but the full-resolution scans of the documents are available in our Internet Archive repository.

Date
Author
Subject
11/30/1966
George L. Silver
LM PGNS Turn on Sequence
05/03/1967
Don Eyles (MIT) New GEOMETRY Routines
06/02/1967
Don Eyles (MIT) Sines and Cosines of CDU's
08/15/1967
Don Eyles (MIT)
Letter to the editor of the Sunliter
08/16/1967
Don Eyles (MIT)
TWIDDLE
10/17/1967
Don Eyles (MIT)
GENTRAN
11/22/1967
Joseph G. Thibodaux, Jr. (MSC)
LM—1 Engine Recommendation
02/15/1968
R. Larson (MIT)
Data Priority Meeting - DOI - February 14, 1968
04/01/1968
Don Eyles (MIT)
NORM UNIT and QUICTRIG
06/18/1968
LM-3 Data Evaluation Team (GAEC)
Detail Data Evaluation Report, LM-3 OCP 61018, Run Between 11 May and 13 May 1968
10/07/1968
Dan Lickly (MIT)
LUMINARY Level 4 Testing Note
10/23/1968
George W. Cherry (MIT)
Preparation for the LUMINARY FACI Reviews to be Held at MIT/IL During the Week of November 11, 1968 and/or the Week of November 18, 1968
11/04/1968
George W. Cherry (MIT)
Priority of Tasks in Preparation for the LUMINARY FACI Review
01/10/1969
D. G. Hoag (MSC)
Report on Apollo 8
03/21/1969
George W. Cherry (MIT)
Lunar Landing Guidance and Control Modes
04/08/1969
R. Larson
"6" How's and Why's
04/10/1969
D. G. Hoag (MSC) How Did We Do on Apollo 9?
05/09/1969
Lynwood C. Dunseith
Minutes of the Flight Software Readiness Review (FSRR) for the F mission LUMINARY (LUM69 R2) Lunar Module Program
05/23/69
Russ Larson (?)
LUMINARY Anomaly Status 5/23/69
07/25/1969
Don Eyles (MIT)
Altitude Above Terrain
07/31/1969
Clint Tillman (GAEC)
Program Alarms in Powered Descent - Apollo 11
08/06/1969
Don Eyles (MIT)
Notes from the G&N debriefing, August 4 in Houston
08/06/1969
R. Larson
(Untitled) Apparent explanation of Apollo 11 520 alarm, "RADARUPT not expected at this time"
08/07/1969
George M. Low (MSC)
Crew procedures
08/09/1969
C. Tillman (GAEC) Simulating the RR-CDU Interface When the RR is in the SLEW or AUTO (not LOC) Mode in The FMEs/FCI Laboratory
08/13/1969
C. Tillman (GAEC)
Simulating the RR-CDU Interface When the RR is in the SLEW or AUTO (not LOC) Mode in The FMEs/FCI Laboratory (2nd version)
08/21/1969
D. G. Hoag (MSC) Report on Apollo 11
08/27/1969
Allan Klumpp, Nick Pippenger (MIT)
How to Land Beside Surveyor 3 on Apollo 12
How to Land Beside Surveyor 3 on Apollo 12 (copy #2)
(Undated)
D. Estabrook
Notes on Self Test Failure at KSC - Apollo 12
08/26/1969
W. Bernikowich
SUNLITER - RR Error Counters
09/08/1969
Lynwood C. Dunseith LUMINARY 1B updates (mission H1)
09/29/1969
Lynwood C. Dunseith
Mission H1 Flight Readiness Test Prelaunch Erasable Load for LUMINARY 116
10/15/1969
Robert Covelli (MIT)
C13STALL - A Software Fix to the LGC - Radar Interface Problem
10/30/1969
George P. Edmonds, Jr. (MIT)
Shutdown of the PGNCS on the Lunar Surface
12/1969
Russel Larson (?)
Slides:  From Luminary 1A (099 rev. 1) Apollo 11 to Luminary 1B (116) Apollo 12 to Luminary 1C (131) Apollo 13
12/05/1969
Philip G. Felleman (MIT)
Highlights of the Apollo 12 Mission
12/06/1969
Russ Larson (?)
LUMINARY 1C Notes as of December 6, 1969
01/07/1970
S. Greene (GAEC)
FMES/FCI Auto P66 Verification (LUMINARY 131 Rev. 2)
01/22/1970
John Norton (TRW)
Timing Margin Requirements for AGC Programs
01/27/1970
John Norton (TRW)
AGC Features Leading to Increased Software Costs
02/10/1970
Howard W. Tindall, Jr.
Status report on the "P66" fix
02/13/1970
F. J. Rich (TRW)
Method for Approximate Location of the Moon-Earth-Sun
02/18/1970
B. A. Kriegsman, D. E. Gustafson (MIT)
Powered Landing-Maneuver Navigation over Rough Terrain
03/09/1970
Don Eyles (MIT)
What To Do About TLOSS For Apollo 14
03/18/1970
John Norton (TRW) Comments on a Variable Guidance Cycle as a LM TLOSS Fix
04/03/1970
Walter Bernikowich
SPEEDRUN Bias in Lateral Velocity
04/06/1970
Allan Klumpp (MIT)
New real-time plot for monitoring computer activity or time loss (TLOSS)
04/08/1970
Lynwood C. Dunseith
Minutes of the LUMINARY lC (LM131 Rev 1) Flight Software Readiness Review (FSRR) for the Apollo 13 mission
04/22/1970
James C. Stokes, Jr. (MSC)
Phase Elapsed Time (PET) in the AGC
05/07/1970
George R. Kalan (MIT)
LM PGNCS Software Performance with a Failed Attitude Hold or Auto Mode Control Discrete
05/07/1970
F. J. Rich (TRW)
Angular Error in Lunar and Solar Positions Predicted by LOSSEM during Apollo 13
05/28/1970
Robert Covelli (MIT) AGS - PGNCS Radar Interface
06/02/1970
Bedford F. Cockrell (MSC)
The LM and Skylab CMC Lunar-Solar Ephemerides (LOSSEM)
06/10/1970
Walter Bernikowich Altitude Rate Glitch
07/02/1970
James H. Alphin (MSC)
LM Descent Engine Time Constant
07/06/1970
R. Schindwolf (GAEC)
Rate of Descent (ROD) Mode Stability and Performance Analysis
07/06/1970
Larry Berman (MIT)
Errors in R10 - Latvel and Forvel Computations
07/06/1970
R. Covelli (MIT)
Errors in the Computation of FORVEL and LATVEL
07/07/1970
Don Eyles (MIT) P66 Improvements
07/08/1970
Walter Bernikowich Altitude Rate Data
07/21/1970
Larry Berman, Bruce McCoy (MIT)
Altitude Rate "GLITCH” of R10
07/21/1970
R. Covelli
LM Deorbit Program.  See also: P99 procedure.
07/22/1970
Howard W. Tindall, Jr. (MSC)
A little status report on Apollo spacecraft computer programs
07/24/1970
Lynwood C. Dunseith (MSC) ZERLINA Design Review Meeting
07/24/1970
Howard W. Tindall, Jr. (MSC) Latest in Luminary for Apollo 14
07/25/1970
David R. Scott
Luminary Improvements
07/29/1970
John Norton (TRW) Comments on Suitability of Variable Servicer Analog Display Routine for Manned LM Flights; and Comments on Rev. 31 of LM Variable Servicer Program
08/04/1970
Larson, Klumpp, Kalan (MIT)
P66 THROTTLE LOOP PRESENTATION
08/05/1970
Don Eyles (MIT) VARIABLE SERVICER DESIGN REVIEW
08/05/1970
Don Eyles (MIT) DEFINITION AND DESCRIPTION OF THE VARIABLE GUIDANCE PERIOD SERVICER
08/07/1970
R. A. Larson (MIT)
Howard W. Tindall, Jr. (MSC
Latest in Luminary for Apollo 14
08/07/1970
John Norton (TRW) Display Routine for Manned LM Flights; and Comments on Compatibility of Luminary 163 Program with MSC-approved PCRs 287 and 1038
08/19/1970
Lynwood C. Dunseith (MSC) Minutes of ZERLINA design review meeting
08/19/1970
Lynwood C. Dunseith (MSC) Minutes of meeting to discuss the P66 castellation problem
09/27/1970
William E. Fenner
Notes of Interest - Apollo 14 LM Impact
10/13/1970
Hapet Berberian (MIT)
Differences Between Slant Range and Ground-Track Range During Lunar Powered Descent Over Fra Mauro
11/11/1970
Peter Weissman
Proposed Refinements for P99
11/23/1970
Lynwood C. Dunseith (MSC) LGC Flagbit Reference List (Apollo 14)
11/25/1970
John Norton (TRW) Questionable Items in Luminary 185 Listing; and Comments on LM Program Zerlina 56; and Comments on Rev. 10 of Luminary Section 2 GSOP
12/11/1970
Lynwood C. Dunseith (MSC)
LGC Duty Cycle as determined by the Grumman FMES simulator
12/16/1970
Craig Work (MIT)
Computational corrections built into PCR 1129 constants
12/20/1970
(Various)
Luminary 1E simulation reports
12/28/1970
Lynwood C. Dunseith (MSC) Minutes of the LUMINARY 1D (Apollo 14) Flight Software Readiness Review (FSRR )
01/08/1971
James C. Stokes, Jr. (MSC)
Review of hardware dependent constants used in the Digital Auto Pilots for the COLOSSUS and LUMINARY programs
01/12/1971
Allan Klumpp (MIT)
Anomalies in Apollo 14 Descent
01/21/1971
R. Lee, N. P. Dwivedi, R. L. Haken (TRW)
Review of DAP-Related Fixed Memory Constants for LUMINARY 178 and COLOSSUS 108 Programs
01/21/1971
Kenneth Russell
Note of Interest - LM lunar impact procedures for Apollo 14 (P99)
01/28/1971
P. Kachmar (MIT)
Excessive N49’s During Short Rendezvous Simulations on the Grumman Hybrid Simulator
02/??/1971
TBD
Luminary 204 erasable memory map graphic
02/04/1971
Robert G. Chilton (MSC)
Fixed memory constants in COLOSSUS 2E and LUMINARY 1D
02/11/1971
Philip G. Felleman (MIT) Apollo 14 Mission Summary
02/12/1971
B. McCoy
Level 3 Test Reports for Luminary 1E
02/16/1971
W. Tanner (MIT)
Apollo 14 Lunar Module Navigation and Guidance System, Preliminary Report on Landing Radar Performance During Descent and Landing in Fra Mauro Highlands
02/17/1971
S. Drake (MIT)
LM Hybrid Simulator Support of The Apollo 14 Mission
03/08/1971
Fred W. Haise (MSC)
"To Abort or not to Abort - that is the question!"
03/09/1971
R. Larson (MIT)
Apollo 15 mission techniques - Descent Meeting 1 March 1971
03/12/1971
John R. Garman (MSC)
Decisions leading to the solution of the LGC abort discrete problem
04/01/1971
Jay Greene
Note of Interest - N69 Uses for Apollo 15
04/09/1971
R. Gilbert
LUMINARY 1E (210) vs LUMINARY 1D (178) or here
05/04/1971
John Norton (TRW) "Norton is Working With Us"
05/11/1971
Larry Berman (MIT)
Idiosyncracies of the Ascent Guidance
06/08/1971
Don Eyles (MIT) Landing Pulse-Out
06/17/1971
TBD
MIT/CSDL Presentation for the Mission "J-1" Apollo 15 Flight Software Readiness Review Held at NASA/MSC on 17 June 1971, LM Program
06/29/1971
James C. Stokes, Jr.
Minutes of the LUMINARY 1E (Apollo 15) Flight Software Readiness Review (FSRR)
07/20/1971
Don Eyles, Craig Schulenberg, Allan Klumpp (MIT)
Backing Up Failed CDUs
07/23/1971
Don Eyles (MIT) Notes on CDU Back-up
08/09/1971
Philip G. Felleman (MIT) Apollo 15 Mission
08/17/1971
Howard W. Tindall, Jr. (MSC) Flight Ropes for Apollo l6 and 17
01/03/1972
Lance Drane (MIT)
Implications of AGC CCS Q Instruction Overflow
01/03/1972
R. A. D'Angelo (MIT)
Simulator Error
01/25/1972
R. A. Sheridan (MIT)
Impact of 'CCS Q' Simulator Error on Flight Programs
02/16/1972
Russel Larson (?)
Luminary Changes Apollo 14 - Apollo 15
03/07/1972
C. Finch (?)
Luminary Postflight Analysis
10/10/1972 (?)
Larry W. Strimple
NOTE OF INTEREST: Lunar Surface Contingency Lift-off Procedures
12/01/1972
Don Eyles (MIT) Altitude-rate error with EMP 103A
01/04/1973
Philip G. Felleman (MIT) Apollo 17 Mission Report

Finally, here's a table of the available PCRs, PCNs, and Software Anomaly Reports related to the LM AGC.  The table is organized by date, so beware (for example) of PCRs that are not entirely in numerical order!  Also, note that many of the hyperlinks in the table target specific pages of much larger documents (Luminary 1D collection or Luminary 1E collection), so in those cases you may find it is more efficient to simply download the complete document(s) once rather than to follow most of the links individually.  I suppose that the casual observer may wonder why these are of any significance now, 50+ years later?  The answer is that they are of great importance to anyone interested in understanding the nature of the changes made between different versions of Luminary, but are indeed of little interest to anybody else!

Date
Originator
Designation
Program
Description
06/11/68
Bennett
PCR-210
Effective Luminary
Increase DPS Throttle Recovery Limit
06/19/68
Eyles, Cherry
PCR-470
Effective Luminary
P68
07/15/68
G. W. Cherry
PCR-497
Effective Luminary
Do Not Delay P63 Throttle-Up Time
08/22/68
J. B. Hill
LNY-14
Luminary 40
RTCC uplink load for P31 ... TPASS4 should replace DELLT4 as part of the uplink load or P31 logic should be modified.
09/03/68
R. F. Stengel
PCR-551
Effective Luminary
Rotational Hand Controller Scaling
09/19/68
Don Hughes
LNY-8
Luminary 42
After throttle recovery in P63 ... Attempts to enter P00 and P37 via V37 gave OPR ERR light ...
09/20/68
P. C. Smith
LNY-15
Luminary 43
The P63 ignition-time computation loop calculates a new Δtig ... After exit, the updated time is mismatched ...
10/01/68
P. C. Smith
LNY-16
Luminary 43
In listing of "TTFINCR," TTF/8TMP is incremented incorrectly ...
10/01/68
J. Glassman
LNY-6
Luminary 47
After the DSKY reset button was depressed ... Program alarm 1501 ensued which indicates an abort situation.  OPR ERR light did not flash ...
10/02/68
P. C. Smith
LNY-17
Luminary 50
Constants PROJMAX and PROJMIN should be scaled to agree with PROJ ...
10/07/68
J. Glassman
LNY-9
Luminary 51
DSKY entry V11N10E ee111E resulted in OPR ERR lamp flash ...
10/22/68
D. A. Pettit
LNY-12
Luminary 51
When the V97NXX is flashing from the engine fail routine (R40), a short duration verb 06 flash appeared intermittently.
11/08/68
Robert Force
LNY-19
Luminary 40
After performing P4X with P20 running ... can only be rectified by terminating P20 ...
11/27/68
Adler, Eyles
PCR-650
Effective Luminary II
Variable Guidance Period
12/12/68
Adler, Eyles
LNY-25
Luminary 69
If P63 is terminated before SERVICER is turned on at TIG-30 seconds, any subsequent selection of P40, P41, P42, or P47 will use an incorrect AVERAGE-G ...
01/07/69
D. Millard
LNY-28
Luminary 69
A restart during R50 (coarse align) will result in a REFSMMAT that does not reflect IMU orientation within coarse alignment accuracy.
01/08/69
Vella
LNY-26
Luminary 69
After an illegal monitor verb-noun is executed the LGC verb register is left containing a display verb rather than ...
01/09/69
A. Klumpp
PCR-688
Effective Luminary 1A
Guidance Frame Erection Check
01/14/69
R. Covelli
LNY-27
Luminary 69
The landing radar velocity update is scaled at twice the scaling it should be.
01/15/69
G. Cherry
PCR-700
Effective Luminary 1A
Improve the Rate-of-descent Mode (P66) Performance
01/20/69
J. Kernan
LNY-29
Luminary 69
The scaling of the computations in P32 and the APSIDES routine causes values of e < .000488 to be treated as 0....
01/20/69
R. Covelli
LNY-30
Luminary 69
A restart in P63 can cause a case where VSELECT will not be properly initialized.
01/20/69
J. Kernan
LNY-31 or here
Luminary 69
Request Executive (V30) and Request Waitlist (V31), which require loading Noun 26, should not be used with programs which share the N26 erasables, ...
01/23/69
Allan Klumpp
LNY-32
Luminary 69
... The consequence of erecting the guidance coordinate frame (GCF) backward (rotated 180 degrees about the vertical) is that the LM turns upside down and crashes....
01/28/69
C. Schulenberg
LNY-33
Luminary 69
The two quantities V2FG and TAUg are indicated to be pad-loaded erasables ... In LUMINARY Rev 69, however, these quantities are in fixed memory.
01/29/69
C. Schulenberg
LNY-34
Luminary 69
The quantity TGOAUG is indicated to be a pad-loaded erasable ... In Rev. 69 of LUMINARY, however, this quantity is in fixed memory....
01/30/69
N. Barnert
LNY-35
Luminary 69
V83 gives incorrect results at small ranges.
01/31/69
P. Adler
LNY-36
Luminary 69
Overflow occurred during LOS calculation in R29DODES.
02/04/69
G. Cherry
PCR-731
Effective Luminary 1A
Modify the Lunar Landing Guidance Equations to Compensate for Computation, Throttle, FINDCDUW, & Attitude Control Lags
02/05/69
P. Volante
LNY-37
Luminary 69
A V32E response to the V16N80 display in the R24 search routine during P22 results in R2 not being updated ...
02/17/69
C. Schulenberg
LNY-38
Luminary 69
Failure of POODOO routine to set superbank bits.
02/17/69
George W. Cherry
PCR-737
Effective Luminary 1A
Permit ATT HOLD Mode In P63, 64, 65
02/20/69
P. Volante
LNY-39
Luminary 69
In R21 the K=60 Counter is set before antenna prepositioning to the mode center, and the RR self track enable is removed after the prepositioning.  The order of these must be reversed ...
03/04/69
R. Covelli
LNY-42
Luminary 69
IMU Alignment on the lunar surface does not zero pipas before coars align....
03/05/69
R. Covelli
LNY-40
Luminary 69
Verb 68, which is supposed to cause an immediate switch from P63 to P64, does not function properly ...
03/05/69
R. Covelli
LNY-41
Luminary 69
IMU compensation on the lunar surface does not initialize the low order part of DELV ...
03/11/69
J. Kernan
LNY-58 or here
Luminary 69 & 96
It is possible to enter a program (V40N72, V41N72, V60, V63, V78) which uses the RR or LR while R12 is reading the LR....
03/12/69
Robert Force
LNY-44
Luminary 69
Program alarm 1201 occurs following bypass of P41 maneuver to the F mission rendezvous plane change thrusting attitude....
03/17/69
D. Eyles
LNY-46
Luminary 69
DEPRCRIT, the depression angle criterion in the P64 redesignation logic, is incorrectly scaled....
03/18/69
W. Ostanek
LNY-47
(Canceled)
Permanent integration of state vectors without W-matrix integration is not restart proof....
03/18/69
P. Volante
LNY-48
Luminary 69
In P20 Rendezvous Navigation (or P22) the range greater than 400 n.m. alarm (526) may not be triggered when the range is between 566 and 980 n.m.
03/21/69
L. Berman
LNY-49
Luminary 69
For early aborts ... For yaw, the overflow is caused by a SL2 ...
03/21/69
A. Klumpp
LNY-50
Luminary 69
During the lunar landing ... corrected range could be displayed as late as 4 secs. after site redesignation.
03/24/69
A. Klumpp
PCR-756
Effective Luminary 1A
Guidance Frame Erection Trajectory Shaping Factors
03/26/69
R. A. Harwood
LNY-45 or here
Luminary 69
An error due to truncation in the computation of engine cutoff time during long burns can cause burn residuals of up to 0.64 fps....
03/26/69
D. A. Pettit
LNY-51 or here
Luminary 69
When P20 is exited by means of V56, and no other program is running concurrently, the major mode display on the DSKY goes blank....
(Undated)
D. Millard
LNY-52
Luminary 69
Inconsistent pipa sampling time between program and GSOP in gravity vector determination routine in P57.
03/26/69
P. Volante
LNY-53
Luminary 69
In R22 the call to R65 from the Navigation subroutine (LSR22.3) is made only when the W-matrix is initialized.
03/26/69
G. W. Cherry
LNY-54
Luminary 69
1301 Alarm (argument of ARCCOS function too large) occurs in R65 ...
03/27/69
J. M. Reber
LNY-55 or here
Luminary 1A
Errors in LUMINARY 1A and COLOSSUS 2A fixed constants ...
04/04/69
P. Volante
LNY-56
Luminary 93
A V41 N72 RR continuous designate which follows an unsuccessful RR search (R24) will not designate to the desired angles.
04/09/69
J. Kernan
LNY-43 rev 1
Luminary 69
If a POODOO program alarm ... occurs during permanent state vector integration, STATEFLG and the NODOFLAG may remain set ...
04/09/69
P. Adler
LNY-57
Luminary 69
Strange behavior is possible following responses to V99 or V97.
04/14/69
C. Schulenberg
LNY-60
Luminary 69
The constant labeled (APO) in P12 should correspond to 55,560 meters instead of the current 55,597.5 meters....
04/15/69
J. Kernan
LNY-59 or here
Luminary 96
Two of the Ephemeris Constants recently changed (PCN 707.2) are incorrect....
04/21/69
R. Simpson
LNY-84
Luminary 97
While performing the G-Mission DOI, a check of the predicted ha and hp ... showed a wide variance ...
04/24/69
P. Volante
LNY-61 or here
Luminary 69 through 97
If a Restart (Hardware or Software) occurs during the Trunnion or Shaft incorporations of P20 Rendezvous Navigation (or P22), an incorrect State Vector Update can occur.
04/28/69
C. Schulenberg
LNY-62
Luminary 69 & 97
If P70 is selected at a point late enough in the landing ...
04/28/69
C. Schulenberg
LNY-63
Luminary 97
If the DPS engine fails to ignite in P40 or if the DPS fails in P40 prior to the time throttle-up was to occur ...
04/28/69
C. Schulenberg
LNY-64
Luminary 97
If a restart occurs in P63 between the nominal ignition time and the time of FTP, the LGC will fail to throttle the DPS ...
05/05/69
R. Simpson
LNY-85
Luminary 97
During a PGNS controlled powered descent test run from PDI, a restart an a 1107 alarm code occurred at TIG ...
05/12/69
P. Adler
LNY-65
Luminary 97
In both targeting and burn programs, the LAMBERT subroutine can ... tie up the computer for an indefinite, possibly unbounded, time.
05/13/69
J. Kernan
LNY-66 or here
Luminary 69 & 98
Indeterminate Program behavior occurs when R04 or R77 is run simultaneously with P25
05/13/69
J. Kernan
LNY-67 or here
Luminary 69 & 98
The GSOP indicates that program alarm 1210 is a Bailout.  However, if two programs call KALCMANU, the 1210 program alarm is a P00D00.
05/13/69
D. Millard
LNY-68 or here
Luminary 69 & 98
In P57, if gyro torquing is attempted (a Proceed on V06N93) while the IMU compensation routines are torquing gyros, a 1210 program alarm will occur.
05/14/69
R. D. Gross
LNY-69 or here
Luminary 97
A spurious commanded firing of a downward forcing RCS jet in powered ascent.
05/20/69
P. Volante
LNY-71 or here
Luminary 99
In P22 Lunar Surface Navigation, the RR pre-designate routine stores into an erasable used by orbital integration (precision integration only).
05/20/69
G. W. Cherry
LNY-72
Luminary 97 & 99
If the LGC does not receive indication of the antenna's reaching position 2 in the antenna re-positioning routine, this routine displays priority alarm 523....
05/20/69
P. Adler
LNY-73
Luminary 97 & 99
If response to V06N61 (P63) is V32E (Recycle) control will be passed to the engine fail routine as if there had been an "enter" response to a V97Nxx....
05/20/69
D. Millard
LNY-74 or here
Luminary 99
In P57 a bad alignment will result in ...
05/20/69
P. Volante
LNY-75 or here
Luminary 69 & 99
In the radar self-test routine, R04, a proceed response to the V16N78 display can result in sampling the rendezvous radar again ...
05/26/69
Densmore
L-(unnumbered)
(Canceled)
Turn on operator error light and exit if SURFFLAG is set when V66 is selected.
05/26/69
D. Eyles
L-2
Luminary 1B
Remove guidance phase switching logic from guidance loop called in the landing ignition algorithm.
05/28/69
J. Kernan
PCR-806.2
Effective Luminary 1B
Allow N07 to address output channels.
06/02/69
G. W. Cherry
PCR-780
Effective Luminary 1B
Provide Pure RR Range, Range Rate, and Time Tag during P20, P22, and P25.
06/04/69
R. Simpson
LNY-86
Luminary 97
... At the end of P70 ... a hardware restart occurred.  The lights on the PAC indicated only a NIGHTWATCHMAN alarm....
06/05/69 J. Stoppelman PCR-821.2 Effective Luminary 1D Move AZO to Fixed Memory.
06/09/69
C. Schulenberg
LNY-76
Luminary 99
During P66 only R1 (horizontal velocity) and R2 (altitude rate) of noun 60 will be updated at the advertised frequency of once per second....
06/13/69
David H. Moore
L-1
Luminary
Fix R13 for check if in P66 before check for mode control in auto....
06/18/69
C. Schulenberg
LNY-77 or here
Luminary 99
It is possible for all computer activity governed by the TIME3 interrupt structure (i.e., Waitlist) to be suspended for a period of about 163 seconds following the selection of P70 ...
06/20/69
K. W. Krause
LNY-78
Luminary 99
Non-zero steady-state attitude errors have been observed in the final 100 seconds of a nominal ascent burn....
06/20/69
K. W. Krause
LNY-79
Luminary 99
Crossplane vehicle oscillations during P64/P65....
06/23/69
Garman
LNY-80
Luminary 99
A V63E causes copying of RADMODES Bit 6 from CH33 Bit 6 (LR position 1 discrete)....
06/23/69
Garman
LNY-81
Luminary 99
V41N72 is used to drive the RR to a given set of angles.... The crew has no way of knowing N73 is overwritten ...
06/24/69
Garman
LNY-82
Luminary 97
P68 sets MAX deadband, but the routine "RESTORDB" executed as part of V37 will return the DB to whatever the crew last requested ...
06/24/80
Garman
LNY-83
Luminary 99
At touchdown (P66) N63 gave ... H of 0.0 ft. ... However, the P68 LAT/LONG/ALT display gave an altitude of -0.4 nm which is not very consistent with the previously mentioned N63 H.
06/27/69
P. Volante
LNY-87 or here
Luminary 99
In P22 the flashing V50 N72 (verify main-lobe lockon) is displayed following radar lock-on in R21, contrary to the GSOP specifications.
07/10/69
R. Covelli
LNY-88 or here
Luminary 99
A hardware reset while R12 is repositioning the landing radar antenna will prevent the antenna from achieving position 2 ...
07/15/69
R. Covelli, P. Weissman
LNY-90 or here
Luminary 99
If an engine fail occurs in P63 between TIG and throttle up, the flashing V97N63 display will be overwritten by the static V06N63 display....
07/22/69
D. Eyles
PCR-848
Effective Luminary 1B
Prevent RR ECDUs from Stealing LGC Memory Cycles
07/23/69
B. McCoy
LNY-89 or here
Luminary 99 rev 1
State Vector was integrated backwards while in POO, P27.
07/26/69
C. Schulenberg
L-5 (see also 08/25/69)
Luminary 1B
Change the displays at the end of descent and ascent guidance to be "non-R" type displays.
07/26/69
C. Schulenberg
L-6 (see also 09/19/69) Luminary 1B
Change the call to ZATEROR in the ascent guidance to a call to the STOPRATE routine.
07/28/69
P. Volante
L-3
Luminary
Make the erasable for R3 in Noun 49 ... unshared.
07/30/69
D. Millard
L-4
Luminary
Compute AOT optic axis using the pad-load ...
07/31/69
R. Gilbert
LNY-91 or here
Luminary
CDU Fail program alarm is given in P20 when it is not an alarm condition - during a RR CDU zero.
08/04/69
D. Eyles, G. Cherry
PCR-854
Luminary 1B
For the pinpoint landing which Apollo 12 may attempt, it is desirable to give the crew a means of changing RLS through the DSKY.
08/04/69
W. Tindall, G. Cherry
PCR-855


08/06/69
Eyles
PCR-882
Effective Luminary 1C or 2
Replace VHORIZ with something better
08/07/69
M. Hamilton
LNY-92 or here
Luminary 1B
If an extended verb with displays (and no CCS NEWJOB is done before the first display) is called during a normal non-flash cyclical display, the extended verb display may not come up until the key release button is selected....
08/08/69
S. Copps
PCR-863.2
Effective Luminary 1C
Make P76 set NODO flag.
08/08/69 S. Copps PCR-872.2 Effective Luminary 1D Initiate TFI in P30s.
08/08/69 S. Copps PCR-874.2
Effective Luminary 1D
Change Decimal Load Techinique
08/14/69
G. R. Kalan
PCR-890
Effective Luminary 2
Improve slosh stability of CSM - docked DAP
08/15/69 R. F. Stengel PCR-884 Effective Luminary 2 Coordination During Manually-Controlled Lunar Landing
08/15/69
Eyles, Adler, Cherry
PCR-886
(Withdrawn)
Variable Guidance Period
08/17/69
G. R. Kalan
PCR-888
Effective Luminary 1C
Modification of DAP Control Authority Model to Include Effect of Jet Plume Deflectors
08/18/69
J. R. Garman
PCR-892
Effective Luminary 1D
Delete R29
08/18/69
J. R. Garman
PCR-893
Effective Luminary 1C
Abort targeting flagbit
08/18/69
J. Garman
PCR-899
Effective Luminary 1D
N38 in C/A, LS, and R/P lists
08/18/69 J. R. Garman PCR-936.2 Effective Luminary 1C
Initialize V90 time to TIG
08/18/69
C. T. Hackler
PCR-943
Effective Luminary 1C
Velocity Reasonability Test
08/19/69
R. Covelli
PCR-895
Effective Luminary 1C
LR Reposition by V59E in P63
08/19/69
R. Covelli
PCR-896
Effective Luminary 1D
LR Velocity Read Centered at PIP TIME
08/19/69
R. Covelli
PCR-897
Effective Luminary 1D
Delete PCR 775.
08/19/69
R. Covelli
PCR-898
Effective Luminary 1D
LR Velocity Read.
08/19/69
P. Volante
L-1B-01 or here
Luminary 116
Selection of P22 before the CSM has entered Mode 2 Radar Coverage can result in an erroneous 530 Alarm.
08/20/69
P. Volante
L-1B-02 or here or reissue
Luminary 116
R29 will not achieve RR lockon.
08/21/69
J. Suddath
PCR-941
Effective Luminary 2
Landing Radar Pre-Filter
08/25/69
Craig Schulenberg
L-5 (see also 07/26/69)
Luminary 1C
Fix bug in P70/71 preferred orientation logic.
08/27/69
R. Goss
L-1B-03 or here
Luminary 116
The quantity COEFFR, computed in the 1/ACCS Program, will be incorrectly determined ...
09/17/69
B. McCoy
L-1B-04 or here
B. McCoy
During the Descent, switching the RR Mode Control into LGC position and then out disables the X-pointer meter for FORWARD and LATERAL VELOCITY display.
09/19/69
R. Goss
L-6 (see also 07/26/69)
R. Goss
Make room for change to fix anomaly L-1B-03 by deleting unnecessary storage....
09/25/69
CTH-EG7
PCR-287
Effective Luminary 1D
Removal of 526 Alarm in P22 & P20
09/30/69
B. McCoy
L-1B-05 or here
Luminary 116
For R60 maneuvers the mode II attitude errors are placed on the FDAI needles before the desired attitude is computed.
09/30/69
H. W. Tindall, Jr., J. R. Garman
PCR-285
Effective Luminary Apollo 13
Remove check of auto throttle discrete
10/02/69
Garman
L-1B-06 or here
Luminary 116
In P66 after touchdown with DAP mode in auto (part of checklist) the following alarms occurred twice ...
10/02/69
Garman
L-1B-07 or here
Luminary 116
The following events were observed on event lights driven by telemetry.  P20 selected and RR designating. ... Crew assumed RR alarm and so did not call it up.
10/02/69
Garman
L-1B-08 or here
Luminary 116
A 520 alarm occurred at time of abort (to P70)....
10/07/69
R. Covelli
PCR-968
Effective Luminary 1C
LPD bias correction
10/14/69
R. Lones
PCR-970.2
Effective Luminary 1D
Modify Gyro Torquing Routine
10/20/69
Bruce McCoy
L-7
Luminary
Change MARKRUPT coding to look for ROD inputs as a decision maker ...
10/20/69
Densmore
L-8
Luminary 1C
Remove DSP2BIT in PINBALL GAME....
10/23/69
G. R. Kalan
L-1B-10 or here
Luminary 116
When the ACA is returned to the detent position after being recycled in and out of detent in the manual rate command mode, the DAP may enter the attitude hold mode immediately, rather than first damping the spacecraft rates as desired.
10/28/69
R. Covelli
L-1B-09 or here
Luminary 99, 116
If a restart occurs during a radar read, the following radar read may be incorrect....
10/28/69
Densmore
L-9
Luminary
Move block of constants used only in interpretive from band 5 to Bank 4 ... to fix Anomaly L-1B-06.
10/29/69
Densmore
L-10
Luminary
Provide a tear-out for section 2 GSOP of absolute addresses for the update program....
10/31/69
B. McCoy
L-1B-11 or here
Luminary 116
Terminal mass error of ~250 lbs. in descent and 50 lbs. in ascent exist due to inaccurate mass computation in SERIVER.
11/05/69
P. Adler
L-1C-01 or here
Luminary all through 1C
Delta-V increment may be subtracted from VG twice following a restart.
11/12/69
J. W. Jurgensen
PCR-294
Effective Luminary 1D
Update Fixed Memory Mass Properties
11/25/69 McCoy L-11 or here
Luminary 1D Change the coding in SPEEDRUN (during SERVICER) to compute ...
12/01/69
R. Covelli
PCR-979
Effective Luminary 1D
Delete 521 Alarm
12/01/69
R. Covelli
L-1C-03 or here
Luminary 130 & 131
If a V59E is used to reposition the Landing Radar antenna to position two at any time other than powered descent in P63, the return from the repositioning wil be incorrect....
12/03/69
B. McCoy
L-1C-02
Luminary 130
During the initialization pass for an "Early Abort" from PDI, locations of a VAC area are destroyed.
12/03/69
R. F. Stengel
Unnumbered PCR
(Unofficial)
Attitude Command During Manually-Controlled Lunar Landing
12/09/69
D. Millard
PCR-982
Effective Luminary 1D
Extend capability of Lunar Surface Star Acquisition Routine R59.
12/09/69
D. Millard
PCR-983
Effective Luminary 1D
Unit Vector Capability for N88
12/10/69
C. B. Parker
PCR-296
Effective Luminary 1D
Set "G" vector parallel to landing site radius vector.
12/10/69
P. Rye
L-12
Luminary
Change exit from LONGCALL
12/12/69
J. M. Reber
PCR-986.2
Effective Luminary 1D
Update Fixed Constants for 1970-1971 Ephemeris Year.
12/17/69
G. Edmonds
PCR-991.2
Effective Luminary 1D
Sum Uplink Data
12/19/69
P. Volante
PCN-990
Effective Luminary 1D
V44 RR Remode Check
12/19/69
P. Volante
L-1C-04
Luminary 1C
If V44 (terminate RR continuous designate) is keyed in while an antenna remode is in progress, the RR error counters are disabled ...
12/30/69
P. Rye
L-13 or here
Luminary
Create subroutine RLEASVAC to release VAC area and change FINDVAC to a NOVAC job....
01/07/70
B. McCoy
L-1C-05
Luminary 116
HCALC, the altutude estimate during a Descent or an Ascent, does not have sign agreement; ...
01/09/70
Adler
L-14
Luminary 1D
Save 3 words in bank 1 by equating GENADR ...
01/16/70
C. T. Hackler
PCR-298
Effective Luminary 1D
Decrease time to call alarm code 523
01/16/70
McCoy
L-15
Luminary 1D
Instead of setting bits via "CS, INH, MASK, TS", a "TC CLRADMOD" ...
01/19/70
J. R. Garman
L-1C-06
Luminary 131 rev 1
P40, P42, or P63 commanding ullage, with average-g off....
01/21/70
J. R. Garman
PCR-302.2
Effective Luminary 1D
Channel 77
01/26/70
P. Rye
PCR-996
Effective Luminary 1D
Liftoff Check in P07
01/30/70
J. H. Alphin
PCR-306
Effective Luminary 1D
Add ΔVM to descent/ascent downlist
02/02/70
A. Klumpp
PCR-1013
Effective Luminary 1C
Multiple Servicers Avoidance in P66.
02/02/70
R. Larson
PCR-1015
Effective Luminary 1D
Check for AVEGON at Start of R36.
02/06/70
Don Eyles, Allan Klumpp
L-16
Luminary
P66 should call the throttle as follows ...
02/10/70 R. Covelli PCR-1021 Effective Luminary 1D Fixed Memory Landing Radar Transformation Matrices
02/10/70
R. Covelli
PCR-1022
Effective Luminary 1D
Landing Radar Position Alarms
02/13/70
R. W. Carl
PCR-311
(Disapproved)
Rendezvous and Prethrust Downlink Change
02/18/70
B. McCoy
L-17
Luminary 1D
Remove the zeroing of bit 4 of channel 14 from STARTSUB2.
02/25/70
T. J. Blucker
PCR-307
Effective Luminary 1D
Lunar Surface Align Downlist Change
02/25/70
Dave Moore
L-18
Luminary 1D
Change order of coding from ...
02/26/70
S. G. Bales
PCR-314
Effective Luminary 1D
Downlist changes for powered descent
02/26/70
Eyles
PCR-1024
(Disapproved)
Variable Guidance Period Servicer
02/27/70
R. Covelli
PCR-1025
Effective Luminary 1D
Remove gravity computation after landing radar attitude update
03/02/70
P. Rye
PCR-315.2
Effective Luminary 1D
Channel 77
03/03/70
B. Kriegsman
PCR-1027
Effective Luminary 1D
A priori terrain models
03/03/70
B. Kriegsman
PCR-1028
Effective Luminary 1D
Two-segment Altitude Weighting Functions for Landing Maneuver
03/03/70
Hamilton
L-21
Luminary
Put in a list of ECADRs at the beginning of the listing for uplinked parameters ...
03/11/70
W. Ostanek
L-1C-07
Luminary 131 & 131 rev 1
The result of extended verb precision integration while in P00 may be stored into permanent state vector storage, possibly resulting in erroneous state vectors and W-matrix....
03/11/70
L. Berman
PCR-1030
(Disapprovd)
Replacement of Logsub
03/18/70
C. T. Hackler
PCR-310
Effective Luminary 1D
Time to call 511 alarms
03/18/70
R. Larson
PCR-1029
Effective Luminary 1D
Timing Indicators
03/18/70
McCoy
L-20
Luminary 1D
Change "NEGTOTKP" to "NEGTORKP", ...
03/19/70
Eyles
L-19
Luminary
Use QUICTRIG and *NBSM* in P66 ...
03/23/70
Volante
L-22
Luminary 1D
Delete setting and resetting R04FLAG....
04/01/70
G. R. Kalan
L-1C-08
Luminary 131 rev 1
A hardware or software Restart while the DAP is in the manual rate command mode may cause ...
04/04/70
McCoy
PCN-1035
Effective Luminary 1D
V68 and P66 terminate the terrain model
04/07/70
Eyles
L-24
Luminary 1D
Move ZERLINA, ELVIRA, AZINCR1, and ELINCR1 from E7 ...
04/08/70
Densmore
L-23
Luminary 1D
Delete definitions of 4 unused shared erasables ...
04/21/70
McCoy
PCN-1036
Effective Luminary 1D
PCR 996 (Liftoff check in P07) Improvements
04/21/70
McCoy
L-25
Luminary
Modify 13 instructions in BURN BABY BURN ...
04/22/70
Klumpp
PCN-1037
Effective Luminary 1D
P66 corrections
04/27/70
McCoy
PCR-1038
Effective Luminary 1D
Keep 526 Alarm in P20 (PCR 287)
04/28/70
Klumpp
PCN-1039
Effective Luminary 1D
TERRAIN Model improvements (PCR 1027)
04/28/70
McCoy
PCN-1040
Effective Luminary 1D
Only P41 has Early TFI Countdown (PCR 872.2)
05/08/70
J. Klawsnik
PCN-1042
Effective Luminary 1D
Sect. 3 Rev. 4 GSOP Fix for L-1 C-08
05/08/70
Barnert
L-26
Luminary
Insert check for coarse align before attempting gyro torquing
05/11/70
H. Maher
PCN-1007
Effective Luminary 1D
GSOP Section 2 Rev 9 Editorial Changes
05/11/70
D. Millard
PCR-1044
Effective Luminary 1E
Re-design of R53-R57
05/12/70
J. R. Garman
L-1D-01 or here
Luminary 163 (1D)
"NEEDLER" initialization never takes place following DAP turn-on if IMU error counters (CH 12 B 06) are enabled....
05/12/70
McCoy
PCN-1043
Effective Luminary 1D
Remove zeroing of bit 4 of channel 14 on restart or V37.
05/15/70
J. Klawsnik
PCN-1008
Luminary 1D
GSOP Section 3 Rev 5 Editorial Changes
05/19/70
N. Barnert, P. Rye
L-1D-02 or here
Luminary through 1D
It is possible that a core set overflow (31202 Abort) will result from a "bad" return from pulse torquing due to IMU cage or coarse align.
05/22/70
R. L. Pearson
L-1D-03
Luminary 163
The velocity updates during descents (P-63 and P-64) fail the reasonableness test ...
05/28/70
McCoy
PCR-1048
Effective Luminary 1D
Initialize Elevation Angle in P34
05/28/70
Densmore
L-27 or here
Luminary 1D
Unused constant OCT 7777 was deleted, ...
06/03/70
McCoy
PCN-1052
Effective Luminary 1D
P66 IMU/C.G. Offset compensation
06/12/70
R. Gilbert
PCR-1055
Effective Luminary 1E
NOUN for LPD BIAS
06/15/70
Haise
PCR-317.2
Effective Luminary 1E
Rescaling nouns containing range and range rate
06/18/70 G. R. Kalan L-1D-07 or here
Luminary 173 (1D) If the mode control switch is moved from the ATT. HOLD to the AUTO position before the manual rate command mode has been properly terminated ....
06/22/70 P. Volante L-1D-05 or here
Luminary 173 (1D) The following extended verb routines should not be requested if P20 or P22 is running and the range to the CSM is greater than 400 N. M. ...
06/24/70 B. McCoy L-1D-08 or here
Luminary 173 (1D) Padload "LRWH1" shares erasable memory location with RM of P20.
06/25/70
McCoy
L-28
Luminary 1E
Remove LRPOS initialization from P63 ... Change DOUBLE to DDOUBL ... Change DXCH to an XCH ...
06/26/70
P. Volante
L-1D-04 or here
Luminary 173 (1D)
P25 will not control spacecraft attitude if range to CSM is greater than 566 N. M.
06/29/70
McCoy
L-1D-06 or here
Luminary 173 (1D)
"DVTOTAL", the accumulated measured Delta Velocity from SERVICER, incremented twice in one SERVICER cycle after Restart occurred.
07/06/70
Eyles
PCR-1058 or here or here
Effective Luminary 1D
New Landing Analog Displays (R10)
07/06/70
J. H. Alphin
PCR-319
Effective Luminary 1E
A Priori Terrain (ΔH on Downlist)
07/07/70
P. Weissman
PCR-1070
Effective Luminary 1E
GSOP Change for FDAI Needle Initialization Fix (L-1D-01)
07/20/70
B. McCoy
PCR-1056 rev 1
Effective Luminary 1D
Improvements for Impulse and Ullage Logic
07/27/70
J. H. Alphin
PCR-322
Effective Luminary 1D
Change Fixed Constant "Throtlag" from 0.2 to 0.08
07/27/70
R. W. Carl
PCR-324 or here
Effective Luminary 1E
PGNCS/AGS RR data transfer.
07/29/70
B. F. Cockrell
PCR-323
(Disapproved)
Improvements to Ephemerides.
08/03/70
S. Copps
PCR-1066
Effective Luminary 1E
Display N81 On All Passes In P34, P35, P74, P75
08/11/70
R. Covelli
L-29
Luminary
Change the two lines of coding at locations MOONSPOT and MOONSHOT +1 ...
08/11/70
R. Covelli
L-30
Luminary
In SERVICER, move the tag "MOONSPOT" from the location where it currently is ...
08/12/70
Sumner Rosenberg
L-31
Artemis
Set a list of labels = to each location that is in the downlink lists ...
08/12/70
Sumner Rosenberg
L-32
Artemis
Put a list in the downlink log section, using the new instruction "CHECK=" ...
08/17/70
Eyles
Unnumbered PCR
(Unofficial)
Eliminate P63 Alignment Option
08/21/70
Rye
L-37
Luminary 1E
Make bad return from IMUSTALL in 1/GYRO continue instead of go to ENDOFJOB
08/24/70
P. S. Weissman
L-1D-10 or here
Luminary through 175
There are a number of windows during which a change in major mode would wipe out a waiting 1/ACCS job, leaving the DAP with improper data....
08/24/70
Eyles
Unnumbered PCR
(Unofficial)
Simpler LR turn-on logic
08/24/70
Eyles
Unnumbered PCR
(Unofficial)
Zero auto-throttle when in AGS
08/26/70
P. S. Weissman
PCN-1059
Effective Luminary 1E
Have major modes changes set up a 1/ACCS job.
08/26/70
P. S. Weissman
L-33
Luminary 1E
Load the "trap" of the DAP state estimator with a value that is 1 bit off from the GSOP value....
08/26/70
Eyles
Unnumbered PCR
(Unofficial)
Ignore V34E display response during descent
09/02/70
McCoy
PCR-1079
Effective Luminary 1E
ALMCADR on the telemetry
09/08/70
R. Larson
PCR-1080
(Disapproved)
Change time to perform IMUCDU zero.
09/11/70
R. Larson
L-1D-11 or here
Luminary 178 (1D)
The value of WB is mis-scaled in Luminary 1D by a factor of 2 (See Luminary MEMO #169)
09/12/70
P. Volante
L-1D-12 or here
Luminary 178 (1D)
Selection of V41N72 (RR Coarse Align) while an RR reposition or remode is in progress results in incorrect operation of V41N72....
09/14/70
J. M. Reber
PCR-1082.2
Effective Luminary 1E
Update Fixed Constants for 1971-1972 Ephemeris Year
09/21/70
N. Barnert
L-34
Luminary
Erasable clean-up ...
09/22/70 Haise, Kaiser PCR-340 (Disapproved) LATVEL Polarity Change
09/23/70
C. T. Hackler
PCR-333
Effective Luminary 1E
Change recognition of ROD inputs
09/23/70
Hase, Kaiser
PCR-335
Effective Luminary 1E
Remove Alignment Option from P63
09/23/70
Ed Grace
PCR-1092
(Disapproved)
Increase Accuracy of Determination of Accelerometer S. F.
09/25/70
P. Rye
PCR-1088
Effective Luminary 1E
Inhibit program change during critical 10.56 seconds after IMU zero. (V37 lockout)
09/28/70
Haise, Kaiser
PCR-334 rev 1 or here
Effective Luminary 1E
Change DSKY DESCENT/ASCENT NOUNS
09/28/70
Haise, Kaiser
PCR-336 rev 1
Effective Luminary 1E
Allow Extended Verbs During P20 Maneuvers. (Delete 06 18 Display in R60.)
09/28/70
Haise, Kaiser
PCR-338
Effective Luminary 1E
Change LPD Scaling to 1.0° In All Directions
09/28/70
Haise, Kaiser
PCR-339
Effective Luminary 1E
Have P20 F50 72 Display Update
09/29/70
J. H. Alphin
PCR-341 or draft
Effective Luminary 1E
Landing Radar Reasonability Test
09/29/70
Barnert
L-35
Luminary 1E
Change coding in LLGE to store triple precision ...
10/01/70 Haise, Kaiser PCR-337 rev 1 or here
(Disapproved) Illuminate Unused DSKY Light for N49
10/02/70
McCoy
PCR-1091
Effective Luminary 1E
Priority Display Light on DSKY
10/05/70
William Robertson
PCR-1093
Effective Luminary 1E
Eliminate 481 day TEPHEM limitation in Lunar-Solar Ephemerides
10/05/70
Rye
L-36
Luminary
Define a tag TMPDV = GDT/2 for use by S34/35.5 which now uses GDT/2 directly.
10/05/70
Densmore
L-39
Luminary 1E
Change a CADR to an ADRES following a TC TWIDDLE in RADSAMP
10/07/70
P. S. Weissman
PCN-1095
Effective Luminary 1E
Avoid incomplete close-out of manual rate command mode (Anomaly L-1D-07)
10/08/70 Larson L-1D-13 Luminary 178 (1D) PCR 1028 provided a separate erasable load for LRWH in the programs following P63....
10/08/70 C. D. Sykes L-1D-14 or here
Luminary 178 (1D) At TIG-5 in P40, TGO is computed.  If TGO is computed to be less than 6 seconds, NO THROTTLE FLG (FW5 B12) should be set  ....
10/08/70
McCoy
PCR-1096
(Disapproved)
Erasable Memory De-orbit Program Goes Fixed
10/08/70
Barnert
PCN-1124
Effective Luminary 1E
P00D00 Abort. (See L-1D-15)
10/15/70
C. Work
PCR-1106
(Disapproved)
Trim gimbal control mode change
10/20/70
P. Rye
PCR-1100
Effective Luminary 1E
Delete setting of NODOFLAG in R47
10/21/70
T. Price
PCR-343
Effective Luminary 1E
Disapprove PCR 340.
10/22/70
G. Edmonds, Jr.
PCR-1107
Effective Luminary 1E
Back up of Abort bits Channel 30 Bits 1 and 4 for on (0)
10/22/70
G. Edmonds, Jr.
PCR-1108
(Disapproved)
Back up Mark X, Y and Mark Reject Channel 16 Bits 3, 4, 5
10/22/70
G. Edmonds, Jr.
PCR-1109
Effective Luminary 1E
Back up of off (1) failures of Auto Throttle Channel 30 Bit 5
10/22/70
G. Edmonds, Jr.
PCR-1110
Effective Luminary 1E
Back up for failures of the display inertial data bit Channel 30 Bit 6
10/22/70
G. Edmonds, Jr.
PCR-1111
Effective Luminary 1E
Back up failure of Auto Pilot mode and AGS/PGNS select switch bit Channel 30 Bit 10, Channel 31 Bits 13, 14
10/22/70
G. Edmonds, Jr.
PCR-1112
(Disapproved)
Back up for on (0) failures of translation commands Channel 31 Bits 7-12
10/22/70
G. Edmonds, Jr.
PCR-1113 or draft
(Withdrawn)
Back up failure of the LPD bit Channel 31 Bits 1, 2, 5, and 6.
10/23/70
Haise, Kaiser
PCR-344
(Disapproved)
Navigation inputs via DSKY
10/23/70
Eyles
L-43
Luminary
Enable the redesignation trap at the time of the PROCEED to V06N64 instead of at the start of P64
10/26/70
P. Weissman
PCR-1121
Effective Luminary 1E
Replace acceleration estimate with RCS inhibit flags on non-powered downlists.
10/26/70
Rye
L-38
Luminary 1E
Rearrange clearing of flags in V56, change code at TRMTRAK1 to interpretive
10/26/70
P. S. Weissman
L-41
Luminary
Avoid reading the GTS drive bits in channel 12 ...
10/27/70
L. Berman
PCR-1116
(Disapproved)
Automatic RCS Steering
10/27/70
Rye, Barnert, Hamilton
PCR-1117.2
Effective Luminary 1E
Addition to P00D00 logic; Add ABORT GSOP Description
10/28/70
Densmore
L-40
(Canceled)
Delete GOMARK2, MARKFORM, and GOMARK2R....
10/29/70
C. Hackler
PCR-345
(Disapproved)
Change of Erasable Load
11/02/70
M. Hamilton
PCR-1097.2 rev 1
Effective Luminary 1E
Provide V30, V31 Operator Error Lockout
11/02/70
P. S. Weissman
PCR-1122
(Disapproved)
No Control DSKY Light
11/05/70
N. Brodeur
L-42
Luminary 1E
Append a (+/-) to relative addresses ...
11/12/70
N. Barnert
L-1D-15 or here
Luminary 178 (1D)
P00D00 Abort while P20 (P25) is running in the background will kill P20 (P25) and prevent its re-establishment unless RNDVZFLG (P25FLAG) is subsequently cleared.
11/18/70
B. McCoy
PCN-1126
Effective Luminary 1E
Set NOTHROTL for DPS Impulse Burn
11/24/70
R. Larson
PCN-1127
Effective Luminary 1E
Change to downlink list
11/25/70
T. Price
PCR-347
Effective Luminary 1E
Modification to code word configuration for PGNCS/AGS data transfer
11/25/70
F. Haise, T. Kaiser
PCR-348
Effective Luminary 1E
New target - ΔV program for LGC (P77)
11/30/70
Work, Weissman
PCR-1129 or draft
Effective Luminary 1E
Update mass-dependent calculations in 1/ACCS
12/01/70
Weissman
L-44
Luminary 1E
Make T5ADR single precision since it always goes to F16 in E6.
12/03/70
McCoy
L-45
Luminary
Clear INTYPFLG prior to INTEGRUS call in P21 recycle option
12/08/70
P. Volante
L-1D-16 or here
Luminary 178
Fixed Memory constant (VINJNOM) (Nominal Injection Velocity) is 5509.3 fps instead of 5509.5 fps as specified in GSOP.
12/10/70
P. Volante
L-1D-17 or here
Luminary 178
The flashing verb 37 which terminates P22 when the range is greater than 400 n.m. and the range-rate is positive may not occur.
12/10/70
P. Volante
L-1D-18 or here
Luminary 178
In P22, if the R21 routine (RR designate) drives the antenna close to the RR Mode II limits as the CSM is moving away from the landing site, ....
12/10/70
Densmore
L-46
Luminary 1E
Delete INHINT before waitlist call in AOTMARK (waitlist does INHINT)
12/11/70
P. S. Weissman
L-47
Luminary 1E
Re-code the P-axis minimum impulse routine more efficiently ...
12/15/70
J. B. Smith
PCN-1009
Effective Luminary 1D
Luminary 1D Editorial Changes to Section 4 (GSOP)
12/21/70
Rye, Barnert
PCN-1132
Effective Luminary 1E
Correction to PCR 1117.2, Addition to P00D00 Logic, Add Abort GSOP Description
12/28/70
P. S. Weissman
PCN-1133
Effective Luminary 1E
Revision of descent mass limits to go along with PCR 1129
12/29/70
P. S. Weissman
PCR-1134
Effective Luminary 1E
Revision of PCR 1111: Back-up of Guid Select and Mode Control switches
12/30/70
B. McCoy
L-1D-19 or here
Luminary 178
Restarts in P20/25 may erroneously display V50N18 on DSKY
12/31/70
P. Rye
L-1D-20 or here
Luminary 178 (1D)
If a BAILOUT occurs during permanent integration in P00, R22, or R21 and is followed by any other restart before another restart point has been established, ....
01/12/71
P. Volante
PCN-1137
Effective Luminary 1E
Correct constant for ascent guidance
01/14/71 J. R. Garman L-1D-24 Luminary 178 P70 or P71 selection prior to P12 leaves P12 with at least 3 flags abnormally set ....
01/14/71 J. R. Garman L-1D-25 Luminary 178 Exiting P63, P40, or P42 with a V37 between average-G on and time of auto-ullage initiate may not kill the waitlist call to initiate ullage....
01/18/71
P. Volante
L-1D-21
Luminary 178
An RR antenna reposition initiated by R25 just after starting P20 or P22 can cause P20/P22 to loop and thus never get RR lock-on.
01/18/71
P. Volante
L-1D-22
Luminary 178
A hardware or software restart during a RR TURNON sequence may result in an incorrect setting of the mode flag (ANTENFLG) ....
01/19/71
A. Klumpp
L-1D-23
Luminary 178
In the erection of the guidance coordinate frame (CGCALC), WCHPHASE instead of WCHPHOLD is used to select ....
01/22/71
B. McCoy
PCN-1141
Effective Luminary 1E
Initialize FLRCS in P12
02/16/71
J. Klawsnik
PCN-1143
Effective Luminary 1E
Section 3 Revision 6 GSOP Changes
04/05/71
R. Larson, K. Greene
PCN-1147
Effective Luminary 1E
Clarification of the Implementation of PCR 334 Rev 1 "Change DSKY Descent/Ascent Nouns"
04/09/71
R. L. Pearson
L-1E-06 or here
Luminary 209
A V78 during P63 N62 display prior to average-G results in P.A. 1201 and clobbers the LM velocity vector.
04/09/71
R. L. Pearson
L-1E-07 or here
Luminary 209
An inadvertent proceed on the V16N80 display in P20 caused the program to "get lost"....
04/09/71
R. L. Pearson
L-1E-09(?) or here
(Not an anomaly)
A V33 during P22 at range less than 400nmi causes P22 to to to sleep when range is equal to 400 and until the V33 is terminated.
04/12/71
P. Volante
L-1E-04
Luminary 210
P22 lunar surface navigation initializes the W-matrix when the mark counter is zero, instead of checking the RENDFLAG....
04/13/71
P. Volante
L-1E-01
Luminary 210
If P22 is selected when range to CSM is >400 N. M. and closing, then V37 will not flash when ...
04/13/71
P. Volante
L-1E-02 rev 1
Luminary 210
Exiting P63, P40 or P42 with a V37 approximately 50 microseconds before ullage on will result in ...
04/13/71
D. Moore
L-1E-03
Luminary 210
A V34E response to the flashing V06N60 display in P66 may result in a 31502 bailout alarm
04/13/71
P. Volante
L-1E-05 rev 1
Luminary 210
If an engine fail occurs in P70 or P71, and an enter response is made to the flashing verb 97, noun 63 will be displayed with flashing verb 99, instead of noun 94....
04/14/71
P. Weissman
L-1E-08 or here
Luminary 209 (1E)
DAP interrupt could occur in the middle of the ZATTEROR zeroing sequence or STOPRATE
04/14/71
P. Volante
PCN-1148
Effective Luminary 1E
Add FRSTIME flag definition to section 2 GSOP

COLOSSUS Memos, Anomalies, PCRs, and PCNs

The following table is a series of memos from the MIT Instrumentation Lab dealing with issues of Colossus software development.  Ones which we know about but don't have copies are grayed out.

COLOSSUS Memo #

Date

Author

Subject

1
11/07/67
J. Rhode
Nothing's Here to Stay - Not Even KKK
2
11/15/67
S. Copps
Tiger Team
3
11/20/67
F. Martin
TLI Design & Review Committee
4
11/22/67
S. Copps
Chapter 4 COLOSSUS GSOP
5
11/27/67
J. Saponaro
Synchronization of W-Matrix & State Vector
6
11/30/67
D. Estabrook
Alarm & Abort Codes in SUNDISK
7
11/30/67
A. Kosmala
Preliminary COLOSSUS Level 4 Test Plan
8
12/04/67
F. Martin
GSOP Review
9
12/05/67
S. Copps
Expected NASA Initiated PCR
10
12/08/67
F. Martin
SUNDISK & COLOSSUS Chapter 3 and Autopilot Priorities
11
12/14/67
F. Martin
TLI and Mass-Inertia Update
12
12/20/67
F. Martin
Chapter 4 and 5 of COLOSSUS GSOP
13
12/15/67
S. Copps
Chapter 4 COLOSSUS GSOP
14
01/08/68
M. Hamilton
COLOSSUS Revisions 136, 137 and 138
15
01/08/68
F. Martin
Translunar Injection Program P15
16
01/14/68
M. Hamilton
COLOSSUS Revisions 139, 140 and 141
17
01/17/68
R. Bairnsfather
Conic Time of Flight Calculation
18
0/17/68
F. Martin
COLOSSUS Internal Change Procedures
19
01/22/68
M. Hamilton
COLOSSUS Revisions 142, 143 and 144
20
01/22/68
C. Braunhardt
Test Plans
21
01/24/68
J. Vella
Recent Changes to PINBALL Affecting DSKY Operation
22



23
01/29/68
F. Martin
Detailed Description of the SUNDISK/COLOSSUS Delta-V Monitor
24
01/29/68
M. Hamilton
COLOSSUS Revisions 145, 146, 147 and 148
25
02/06/68
M. Hamilton
COLOSSUS Rev. 149, 150,151 and 152
26
02/06/68
A. Martorano
Minutes of PCR Meeting 2 February 1968
27
02/12/68
M. Hamilton
Revisions 153, 154, 155, 156 and 157
28
02/14/68
S. Davis
Hybrid Facility Procedures
29
02/14/68
M. Hamilton, A. Kosmala
Milestones for Level 4 Testing
30
02/14/68
A. Kosmala
COLOSSUS Level 4 Documentation
31
02/16/68 F. Martin
COLOSSUS Internal Change Procedures
32
02/19/68 M. Hamilton
COLOSSUS Rev. 158, 159, 160, 161, 162 & 163
33
02/20/68 J. Saponaro
Lunar Landmark Tables for Use in COLOSSUS Testing
34
02/26/68 B. Tinkham
COLOSSUS Downlists
35
02/26/68 M. Hamilton
COLOSSUS Revs. 164, 165, 166,167 and 168
36
02/27/68 M. Hamilton
COLOSSUS Priority Displays
37
03/04/68 M. Hamilton
COLOSSUS Revisions 169,170,171 and 172
38
03/04/68 A. Kosmala
Key Release Light
39
03/08/68
N. Neville
SETUP504
40
03/11/68
M. Hamilton
COLOSSUS Rev. 173, 174,175,176 and 177
41
03/14/68
A. Kosmala
ABORT
42
03/15/68
J. Saponaro
AGC Time Dependent Constants
43
03/18/68
M. Hamilton
COLOSSUS Revs. 178,179, 180, 181 and 182
44
03/20/68
F. Martin
COLOSSUS Verification Plan- Preliminary
45
03/26/68
M. Hamilton
COLOSSUS Revs. 183, 184 and 185
46
03/26/68
C. Braunhardt
Status Report-COLOSSUS Level 3 Verification Plan
47
03/28/68
M. Hamilton
COLOSSUS Level 4 Assignments
48
04/05/68
C. Braunhardt
Addenda COLOSSUS Level 3 Verification Plan
49
04/03/68
M. Hamilton
COLOSSUS Revisions 186, 187 and 188
50
04/09/68
M. Hamilton
COLOSSUS Revisions 189, 190 and 191
51
04/17/68
M. Hamilton
COLOSSUS Revisions 192, 193 and 194
52
04/24/68
C. Braunhardt
Standards for Verification Plans
53
04/23/68
M. Hamilton
COLOSSUS Revision 196
54
04/25/68
F. Martin
Section 4 (Rev. 1) of the COLOSSUS GSOP
55
04/25/68
H. Walsh
Downlink Edit Notes
56
05/02/68
M. Hamilton
COLOSSUS Revisions 197, 198, 199, and 200
57
05/06/68
M. Hamilton
COLOSSUS Revisions 201 and 202
58
05/13/68 Don Eyles RTB
59
05/13/68
J. A. Saponaro
Problems Concerning the Lunar Sphere of Influence
60
05/14/68
M. Hamilton
COLOSSUS Revisions 203, 204 and 205
61
05/22/68
M. Hamilton
COLOSSUS Revisions 206, 207 and 208
62
06/03/68
M. Hamilton
COLOSSUS Revisions 209 and 210
63
06/06/68
M. Hamilton COLOSSUS Revs. 211 and 212
64
06/14/68
M. Hamilton
COLOSSUS Revisions 213 and 214
65
06/18/68
S. David
Revision of COLOSSUS Digital Environment
66
06/19/68
Fred H. Martin
A Multiplier Effect While Using TLOSS During Simulations
67
06/21/68
M. Hamilton
COLOSSUS Revisions 215 and 216
68
06/26/68
M. Hamilton
COLOSSUS Revision 217
69
07/08/68
M. Hamilton
COLOSSUS Revisions 218 and 219
70
07/10/68
M. Hamilton
COLOSSUS Revision 220
71
07/11/68
F. Martin Coasting in Average-G
72
07/18/68
M. Hamilton
COLOSSUS Revision 221
73
07/22/68 F. Martin Behavior of the Tracker & Uplink ACTY Lights During Rendezvous
74
07/29/68 P. Rye
COLOSSUS Revisions 223 and 224
75
08/02/68 P. Rye COLOSSUS Revs. 225, 226 and 227
76
08/06/68 P. Rye COLOSSUS Revs. 228, 229 and 230
77
08/06/68 P. Rye COLOSSUS Program Notes at Time of FACI (8/8/68)
78
08/13/68 P. Rye COLOSSUS Revisions 231 and 232
79
08/13/68 F. Martin Pre-FACI Action Items
80
08/20/68 F. Martin COLOSSUS Release
81
08/19/68 P. Rye COLOSSUS Revisions 233 through 236, COL 236 Revisions 1 and 2
82
08/28/68 M. Hamilton COLOSSUS Level 5 Hybrid Testing
83
08/29/68 M. Hamilton COLOSSUS Digital Level 5 Testing
84
08/26/68 T. Crocker
Lunar Landmark Tables
85
09/06/68 F. Martin Sketch of COLOSSUS I Level 5 Plan
86
09/11/68 M. Hamilton COLOSSUS Digital Level 5 Assignments
87
09/12/68 W. Ostanek
Relative Coasting Integration Error Variance
88
09/13/68 F. Martin Priorities for COLOSSUS 1 Level 5 Mission Performance Testing Plan
89
09/24/68 M. Hamilton COLOSSUS Assemblies
90
09/25/68 N. Brodeur
COLOSSUS Revision 238
91
09/26/68 N. Brodeur
Known Anomalies in Revision 237
92
10/01/68 N. Brodeur
COLOSSUS Revision 239
93
10/02/68 M. Hamilton
New Names for COLOSSUS Assemblies
94
10/03/68 M. Hamilton
COLOSSUS Revision 237*
95
10/10/68 N. Brodeur
COLOSSUS Revision 240
96
10/11/68 F. Martin
COL I Level 5/6* Test Plan
97
10/15/68 N. Brodeur
COLOSSUS Revisions 241 and 242
98
10/23/68 N. Brodeur
COLOSSUS Revision 243 and 244
99
10/22/68 P. Rye
Revisions 1 - 5 of COMANCHE
100
10/30/68 N. Brodeur
COLOSSUS Revisions 245 - 249
101
11/05/68 G. Edmonds
System Test Group Tests of COLOSSUS I
102
11/15/68 P. Rye Revisions 6, 7 and 8 of COMANCHE
103
11/18/68 F. Martin
COLOSSUS 1A
104
11/18/68 F. Martin
GSOP Changes for COLOSSUS 1A (Rev. 249)
105
11/20/68 M. Hamilton
Changes Made to COLOSSUS (Rev. 237 to 249), or How We Created COL. 1A
106
11/25/68 M. Hamilton
COMANCHE & COLOSSUS 1B Assemblies
107
11/25/68 M. Hamilton
Meeting Held on COMANCHE & COLOSSUS 1B Changes
108
11/25/68 M. Hamilton
Noun Limits in COLOSSUS
109
11/21/68 M. Hamilton
P23 Operation Information
110
11/22/68 I. Johnson, G. Levine
Mission C Prime Rules for Maintaining W-Matrix Validity
111
11/26/68 M. Hamilton
Illegal Program Sequences in COLOSSUS
112
11/27/68 F. Martin
Verb 67 Operation Information
113
12/03/68 M. Hamilton
Meeting Held on COMANCHE & COLOSSUS 1A
114
12/03/68 P. Rye, N. Brodeur
Fresh Start Initialization
115
12/04/68 F. Martin
Avoid Difficulties in Vicinity of the Lunar Sphere of Influence (COL Rev. 237, 249)
116
12/05/68 P. Rye COMANCHE Rev. 9 and 10
117
12/10/68 T. Brand
Suggested Targeting Using P37, P21 and P61 to Secure a 1350NM Entry for Mission C
118
12/06/68 G. Levine
COLOSSUS Guidance Equation Singularities
119
12/09/68 P. Rye COMANCHE Revisions 11 and 12
120
12/09/68 N. Brodeur Rev. 237 References to SQRT, ARCSIN, ARCCOS, ASIN, ACOS
121
12/10/68 T. Brand
P37 Restrictions Resulting from COL Anomaly #53
122
12/11/68 M. Hamilton
COMANCHE Level 4 Testing Assignments for CDH-CSI Sequences
123
12/11/68 M. Hamilton
V83 Operational Information for Rev. 237
124
12/11/68 F. Martin
Return to Earth Operational Information
125
12/13/68 F. Martin
P22 Operation Information for Rev. 237
126
12/13/68 F. Martin
P52, P54 Operation Information
127
12/16/68 W. Ostanek
Preliminary COLOSSUS 2 Level 4 Test Plan for CSI-CDH
128
12/18/68 P. Rye COMANCHE Revs. 13 - 17
129
12/19/68 M. Hamilton
Operational Information on V99 and V97
130
12/23/68 P. Rye Revs. 18 and 19 of COMANCHE
131
01/03/69
P. Rye Revs. 20, 21 and 22 of COMANCHE
132
12/31/68 M. Hamilton
COLOSSUS II (COMANCHE) Testing
133
01/08/69 N. Brodeur
Known Anomalies in Rev. 249
134
01/09/69 F. Martin
COLOSSUS 1A, Level 6 Plan
135
01/10/69 W. Ostanek
Notes on State Vector/W-Matrix Synchronization in COLOSSUS 1A
136
01/13/69 N. Brodeur
Rev. 250 - 252 of COL 1B
137
01/13/69 A. Engel
COL Rev. 249 Level 6 Powered Flight Tests
138
01/13/69 P. Rye Revs. 23 - 27 of COMANCHE
139
01/15/69 M. Hamilton
Discussion of Anomaly COL 69
140 rev 2
03/05/69
Fred H. Martin
Final Content of COLOSSUS 2 (Comanche, Rev. 45)
141
01/15/69 P. Rye
Revs. 28, 29 & 30 of COMANCHE
142
01/15/69 J. Vittek
Mission Action Items for the D Mission
143
01/20/69 J. Turnbull
RCS DAP Orbital Rate
144
01/22/69 M. Hamilton
Operational Information on P40 for Rev. 249
145
01/21/69 P. Rye Revs. 31 - 33 of COMANCHE
146
01/27/69 P. Rye Revs. 34 - 36 of COMANCHE
147
02/03/69 P. Rye Revs. 37 - 39 of COMANCHE
148
01/30/69 J. Turnbull
Orbital Rate + Passive Thermal Control Oper. Information for COLOSSUS 1A(Rev. 249)
149
02/05/69 D. Densmore
As of COMANCHE Rev. 38
150
01/??/69 N. Brodeur
Revs. 253, 254, 255, 256 & 257
151
02/07/69 F. Martin
V35 DSKY Light Test Oper. Information
152
02/07/69 P. Rye Revs. 40 and 41 of COMANCHE
153
02/07/69 S. Copps
CSM Monitoring of the Docked DPS Burn
154
02/18/69 S. Copps
Program Notes Review with D Crew
155
02/20/69 S. Copps
So Called Average G White Paper, Mission Action Item 8
156
02/20/69 T. Crocker
P21 Edit for COMANCHE 39
157
02/21/69 R. Schlundt
COLOSSUS 2 Uprated TVC DAP Test Plan
158
03/03/69 M. Hamilton
Reduction of Coding in COL Attached COL Note #12
159
03/03/69 P. Rye Revisions 42 - 45 of COMANCHE
160
03/05/69 P. Rye Revisions 46 and 47 of COMANCHE
161
03/07/69 P. Rye Revision 48 of COMANCHE
162
03/13/69 P. Rye Revision 49 of COMANCHE
163
03/13/69 J. Saponaro
Accuracy of Verb 83 (Range, Rate Rate, Theta Display)
164
03/17/69 F. Martin Final Content of COLOSSUS 2A COMANCHE Rev. 51
165
03/20/69 F. Martin COLOSSUS 2 and 2A Level 4 Test Summary
166
03/20/69 P. Rye Revisions 50 and 51 of COMANCHE
167
04/08/69 W. Ostanek Use of V96 During State Vector/W Matrix Synchronization
168
03/31/69 I. Johnson
COMANCHE 45 Rendezvous Performance Equals COLOSSUS 249 Rendezvous Perform.
169
04/03/69 J. Stoppelman
Padloads for Testing Mission F & G
170
04/04/69
Saydean Zeldin
MIT Review of Boeing-Houston (MSC) Information Package on CMC Boost Takeover
171
04/15/69
J. Goode
Computation Cycle Timing in TPI, TPM Programs
172
05/06/69
A. Engel, C. Beals, J. Stoppelman
COLOSSUS 2 Level 6 Performance Comparisons
173
04/25/69
J. F. Turnbull Details of How PTC & Orb Rate Procedures Work - Applicable to COLOSSUS 1, 1A, 2 & 2
174
04/25/69
Gerald M. Levine
Transearth MSFN State Vector Updates
175
04/23/69
W. Ostanek
Notes on State Vector/W Matrix Synchronization in COLOSSUS 2, 2A
176
05/02/69
W. Ostanek
Crossing the Sphere in COLOSSUS 2
177
05/06/69
A. Engel, C. Beals Comparisons of COLOSSUS 2 Level 6 Power Flight Runs With/Without Boeing R2 to Lunar Potential Model
178
05/07/69
R. Bairnsfather
Disagreement Between AGC & MAC For Routine 30 in Nearly Circular Orbits
179
05/08/69
Steve Copps COLOSSUS 2D and Subsequent Releases
180
05/09/69
Steve Copps
Techniques for Loading the Landing Site On Board
181
05/19/69
R. Schlundt
CMC Sample Rate During Boost Takeover - Asimulation with 10% TLOSS
182
05/21/69
W. Ostanek
Notes on the Lunar Surface Flag (SURFFLAG) in Colossus 2A
183
05/21/69 E. Muller
Affect of Radar (or the HF Ranging) AGC Interface Problem on F Mission Rendezvous Performance
184
05/23/69 P. Rye
COMANCHE Revisions 52 - 55, Rerelease of COMANCHE Rev. 45 as MANCHE 45
185
05/28/69 J. Stoppelman
Standardization of the Mission G Level 6 EFFORT For the CSM
186
06/02/69 N. Brodeur Optical Marking During POO or P23
187
06/06/69 D. Densmore
Revisions 56 through 58 of COMANCHE
188
06/13/69 S. Copps
SCB Meeting #31 Held on 5 June 1969
189
06/23/69 C. Beals
New S40.13 (Short Burn Logic) for COLOSSUS III
190
06/23/69 D. Densmore Revision 59 and 60 of COMANCHE
191 rev 1
06/30/69
J. Flaherty
Memo Indexes
192
06/26/69
P. Rye Revisions 61 and 62 of COMANCHE
193
07/01/69
T. Brand
P37 Ignition Time Bias
194
07/09/69 P. Rye Use of V83 and V85 (R31, R34) at Altitudes 425 N.M.
195
07/16/69 P. Rye Revisions 63-67 of COMANCHE
196
07/16/69 S. Copps
Final Content of COLOSSUS 2B
197
07/17/69 S. Copps Final Content in Testing of COLOSSUS 2C
198
07/22/69 M. Hamilton Review of Reduction of Coding Approval Procedures
199
07/22/69 N. Brodeur Introduction to COLOSSUS 2C
200
07/14/69 J. Turnbull, W. Widnall
Apollo 10 PTC
201
07/29/69 A. Engel
COLOSSUS 2C (COMANCHE Rev. 67) Padload Relocations
202
07/28/69 R. Bairnsfather
Changes to Entry Monitor System Display in P61 Affecting Crew and Downlist
203
07/31/69
J. F. Turnbull
PCR815/V79/R64/PTC - ORBRATE Routine
204
08/06/69
S. Copps
Saturn DAP Meeting
205
08/07/69
N. W. Brodeur
Revision 1 of Artemis
206
08/11/69
Stephen L. Copps
Optics Calibration for P23
207
08/12/69
A. Engel, W. Ostanek COLOSSUS 2C Testing Summary
208
08/13/69
K. Greene Minutes of Technical Committee Meeting for COLOSSUS 2D and 3
209
08/14/69
A. Engel, B. McCoy H Mission RTCC Compatibility Testing, Test Plan & Schedule (Preliminary)
210 08/14/69 Al Engel, Bruce McCoy RTCC Compatibility Testing at MIT, Current Understanding of Scope, Responsibilities, etc.
211
08/21/69
S. Copps
Technical Committee Meeting of 8/29/69 Resulting from MSC Requirements Meeting of 8/19/69
212 08/11/69 Stephen L. Copps New Requirement for Performing ZERO OPTICS
213
09/10/69
W. F. Ostanek
Bad Other Vehicle State Vector
214
09/11/69
S. Copps
Progress Report on Rate Aided Optics
215
09/22/69
N. Brodeur
Revision 2 of Artemis (COLOSSUS 3)
216
09/24/69
S. Copps
Proposed Contents of COLOSSUS 2D
217
09/24/69
J. F. Turnbull
Performance of R64 Y axis option at a rate = .0507 with CDUX = 180 deg
218
10/02/69
S. David
Configuration Control of RTCC Digital Environment
219
10/03/69
S. Copps
PCR Priority Assignment
220
09/30/69 P. Rye
Revisions 68 & 69 of COMANCHE
221
10/01/69
O. W. Eliassen
CMC Backup Guidance for Saturn V
222
10/08/69
J. Stoppelman, N. Barnert, R. Covelli
T6JOB for COLOSSUS 2C
223
10/13/69
P. Rye Revisions 70 & 71 of COMANCHE
224
10/20/69
N. Brodeur Revision 72 of COMANCHE
225
10/22/69
Ed Olsson
Noun 93 during Pulse Torquing
226
10/27/69 Stephen L. Copps
Final Content and Testing of Colossus 2D
227
11/05/69 J. Goode, N. Brodeur, R. Kiburtz
Automatic Rendezvous Sequence
228
11/10/69 A. Engle, W. Ostanek
Level 3 Tests Conducted on COLOSSUS 2D
229
11/12/69 J. Turnbull
Jet Failed on Detector
230
11/10/69
P. Rye
Revisions 73, 74, and 75 of COMANCHE or "scavenged"
231
11/25/69 O. W. Eliassen
CMC Backup SATURN V (PCR 954)
232
11/21/69 Donald S. Reinke
Work-around for P32 bomb-outs due to insufficient post-CSI or post-CDH pericenter (Alarm codes 601 and 602, respectively)
233
12/01/69 C. Beals
Revision of COLOSSUS Memo #189 (23 June 69) New S40.13 (Short Burn Logic for COLOSSUS 3)
234
12/08/69 R. S. Whittredge
Rate Aided Optics
235
12/15/69 P. Rye Fixed Memory Consideration in COLOSSUS 2E
236
12/16/69 N. Barnert, S. Copps
CSM Automatic Rendezvous Task Description
237
12/15/69
P. Rye
Revisions 76 through 80 of COMANCHE or "scavenged"
238
12/23/69
N. Brodeur
Re-release of COLOSSUS 2D (COMANCHE Rev. 72)
239
12/23/69
P. Rye
Revisions 81 through 83 of COMANCHE or "scavenged"
240 01/08/70 Ken Greene Definition and Usages of PCRs, PCNs, Anomalies & ACBs
241
01/08/70
A. Engel, W. Ostanek COLOSSUS 2D Level 6 Activity (Apollo 13, Mission H2)
242
02/03/70
S. Copps
COLOSSUS 3 Development
243
02/02/70
P. Rye
Revisions 84 through 89 of COMANCHE or "scavenged"
244
02/10/70
P. Rye
Contents of ARTEMIS through Revision 19
245
02/11/70 P. Rye, E. Grace
Erasable (Prelaunch) Performance Test Progra
246
02/10/70 Muller, Kachmar
Procedures for Avoidance of Apollo 12 Pre-CSI CSM Rendezvous Navigation Problem
247
02/12/70 Muller, Kachmar Apollo 12 Pre-CSI CSM Rendezvous Navigation
248
02/10/70 O. W. Eliassen, A. Engel
SATURN Backup Package (PCR 954)
249
02/13/70 O. W. Eliassen, A. Engel COLOSSUS Level 4 Test Plan
250
02/18/70
Sumner Rosenberg
Contents of Artemis from Revision 20 to Revision 24
251
02/23/70 M. Hamilton, P. Rye
AAP Assembly
252
02/26/70
N. W. Brodeur, P. Rye
Revisions 90 through 96 of COMANCHE or "scavenged"
253
02/27/70 M. Hamilton
Powered Flight POODOO's
254
02/20/70 A. Engel, C. Beals
SPS ENG ON Channel Outbit of State Failure
255
02/26/70 A. Engel, C. Beals, V. Demery
Concerning Failure of the SPS ENG ON Channel Flipflop
256
03/02/70 A. Engel, C. Beals, V. Demery SPS ENG ON Channel Outbit "ON" - State Failure
257
03/10/70 A. Engel, P. Rye
LONGCALL Behavior with Negative Δt
258
03/10/70
N. Brodeur
Revisions 97 & 98 of COMANCHE or "scavenged"
259
03/12/70
E. Hume, C. Beals
Apollo 13 DOI Level 6 Perturbation Analysis
260
03/10/70
N. Brodeur
Revisions 25 through 28 of ARTEMIS
261
03/12/70 J. F. Turnbull
Unusual Apollo 12 RCS Firing
262
03/13/70 O. S. Eliassen
Special Boost Glitch Testing on COLOSSUS 2D MANCHE 72 Revision 3
263
03/24/70 E. Hume, C. Beals
Simulation of DOI Perturbations for Apollo 13
264
03/26/70
P. Rye
Revisions 99 through 101 of COLOSSUS or "scavenged"
265
04/06/70
N. Barnert
Universal Tracking
266
04/27/70
N. Brodeur
Revisions 102 through 104 or "scavenged" or another "scavenged"
267
04/28/70
P. Rye
Revisions 29 through 36 of ARTEMIS
268
04/23/70 N. Barnert, A. Engle
All Digital Pre-Level 4 Test Plan for SATURN & BACKUP Package (PCR 954) (Preliminary)
269
05/20/70 N. Barnert, N. Smith
Results of a Universal Tracking (Pointing Option) Study
270
05/28/70 N. Smith
Universal Tracking-Astronaut DSKY Inputs
271
06/03/70
N. Brodeur
The Last of the Comanches
272
06/03/70
N. Brodeur, P. Rye
Revisions 37 through 40 of Artemis
273
06/03/70 S. Copps, K. Greene
Final Content & Testing of COLOSSUS 2E
274
06/10/70 S. Copps
ARTEMIS Discrepancy Reporting Procedure
275
06/10/70 S. Copps, K. Greene COLOSSUS Plans
276
07/02/70
P. Rye
Revisions 1 through 7 of R40ARTMS
277
07/14/70
P. Rye
Revisions 41 through 45 of ARTEMIS. Revision 45 was GOOD.
278 07/22/70 P. Rye, P. Peck Account Numbers 0300 - 0400
280
07/21/70
P. Rye
Revisions 46 through 51 of ARTEMIS
286
09/15/70
N. Brodeur
Revisions 52 through 57 of ARTEMIS
288
09/21/70
N. Brodeur
Revision 58 of ARTEMIS
292
10/08/70
N. Brodeur
Revisions 59 and 60 of ARTEMIS
293 10/09/70 Bill Robertson Summary of Program Change Requests Involving Astrodynamic Coordinate Systems, Ephemerides and Orientations, etc.
296
10/28/70
N. Brodeur
Revisions 61 and 62 of ARTEMIS
301
11/30/70
N. Brodeur
Revision 63 through 67 of ARTEMIS
304
01/04/71
Harry McOuat
Fixed memory hardware related constants in Colossus 2E
306
01/07/71
N. Brodeur
Revisions 68 through 70 of ARTEMIS
310
02/16/71 Dana Densmore DOWNRUPT SEQUENCING, LOST DOWNRUPTS, AND IMPAIRED DOWNLINK INFORMATION
312
03/23/71 Peter Volante, Bill Ostanek Testing on Non Sign Agreement in TEPHEM in Apollo 14
316
04/20/71 William Robertson Limitations in the Astrodynamic Orientation and Ephemeris Routines
326
11/23/71 Margaret Hamilton EMPs
327
11/30/71 Bruce McCoy, Don Millard EMP Control Procedures — Final Iteration

In addition to the "official" memos above that are explicitly marked internally as "COLOSSUS memo #N", we also have other memos of a very similar nature which are not explicitly marked in that way.

Date
Author
Subject
09/20/1968
N. Brodeur
Approved anomalies implemented in COLOSSUS 238
10/01/1968
N. Brodeur
Approved anomalies implemented in COLOSSUS 239
10/09/1968
N. Brodeur
Approved anomalies implemented in COLOSSUS 240
10/14/1968
N. Brodeur
Approved anomalies implemented in COLOSSUS 241 and 242
10/17/1968
N. Brodeur
Approved anomalies implemented in COLOSSUS 243
10/23/1968
N. Brodeur
Approved anomalies implemented in COLOSSUS 244
10/29/1968
N. Brodeur
Approved anomalies implemented in COLOSSUS 245 through 249
06/03/1969
Russ Larson (?)
COLOSSUS Anomaly Status 6/3/69
07/10/1969
Lynwood C. Dunseith
Additional program notes for the G mission COLOSSUS 2A program
08/20/1969
George Reasor
Necessity to zero optics to track the LM after CSI backup for Apollo 11
08/25/1969
George Reasor
More about zero optics problem after CSI backup for Apollo 11
04/15/1970
Lynwood C. Dunseith
Minutes of the COLOSSUS 2D Flight Software Readiness Review (FSRR)
01/08/1971
James C. Stokes, Jr. (MSC)
Review of hardware dependent constants used in the Digital Auto Pilots for the COLOSSUS and LUMINARY programs
01/21/1971
R. Lee, N. P. Dwivedi, R. L. Haken (TRW)
Review of DAP-Related Fixed Memory Constants for LUMINARY 178 and COLOSSUS 108 Programs
02/04/1971
Robert G. Chilton (MSC)
Fixed memory constants in COLOSSUS 2E and LUMINARY 1D
03/07/1972
Copps (MSC)
MIT/CSDL Presentation for the Mission "J-2" Apollo 16 Flight Software Readiness Review Held at NASA/MSC on 7 March 1972, CSM Program

Finally, a small list of available software anomaly reports, program change requests (PCRs), and program change notices (PCNs).  Note that they are organized by date, and hence may be out of strict numerical order.

Date
Originator
Designation
Program
Description
08/27/68
N. Brodeur
COL-3
Colossus 237
When V40 is selected to call R62, the operator error light is turned on erroneously...
02/20/69
T. Crocker
COM-1 or here
Comanche 44
In lunar environment, velocity and flight path angle are incorrect in N73 associated with P21 (see PCR 730)
02/27/69
M. Hamilton
COM-3 or here
Comanche 44
If a PROCEED response is made to V53 flashing in P53 and P54, the program hangs up as a sleeping job.
03/04/69
F. Martin
COM-4 or here
Comanche 44
VG magnitude is not transferred from P30 to P40, P41.
03/06/69
R. Bairnsfather
COM-32
Comanche 67
In AUGEKUGL, the constant V(21K) represents 21,000 feet/sec but is in the program as 64.000 B7  M/CS.  It should be 64.008 B7  M/CS.
03/07/69
P. Rye
COM-6 or here
Comanche 45
Storing of gimbal angles at liftoff for initialization of attitude errors in P11 is not properly restart-protected.
03/13/69
B. Byrne
COM-5 or here
Comanche 44 & 45
Second N88 display (planet option) in P23 requires reload of planet unit vector....
03/14/69
R. Haslam
COM-8 or here
Comanche 45
The second N88 display in P52, P54 (planet option) requires that the unit planet vector be reloaded....
03/18/69
W. Ostanek
COM-9 or here
(Canceled)
Permanent integration of state vectors without W-matrix integration is not restart proof....
03/20/69
R. A. Haslam
COM-7 or here
Comanche 44 & 45
PROCEED response to V50N25 R145 in P51, P53 (please perform celestial body acquisition) fails to initialize gyro compensation
03/27/69
J. M. Reber
COM-11 rev 1 or COM-11
Comanche 45 & 51
Errors in COLOSSUS 2A fixed constants ...
03/28/69
A. Engel
COM-10 or here
Comanche 45?
P40 and P41 calculation of central angle Vg rotation for external ΔV burns may be inaccurate.
04/16/69
M. Hamilton
COM-2 rev 3 or here
Comanche 44
If a P00D00 abort alarms (1206, 1210, 1302, 1501, 1502, 1521, 1204, 1103, 430, 607, 610) takes place ...
05/05/69
Engel
COM-12
Comanche 51 & 55 & 58
The S40.8 code which enables TVC cg-tracking, does not distinguish between pre- and post-switchover (V46, docked) TVC DAP states ...
05/15/69
A. Engel
COM-13
Comanche 45 & 55
The Noun 29 display in V78 (LAUNCHAZ CHANGE) does not permit termination of the extended verb by a V34 response ...
05/15/69
A. Engel
COM-14
Comanche 45 & 55
Only the first and final P17 displays exit properly on V34 response ...
05/28/69
A. Engel
COM-15
Comanche 55
Storing of gimbal angles at liftoff for initialization of attitude errors in P11 is not properly restart protected ...
06/03/69
S. Copps
PCR 815 Effective Colossus 2C
Digital Autopilot Barbecue Mode Routine
07/03/69
S. Copps
COM-31
Comanche 67 & 72
The last sentence of paragraph 5.1.5.1.1 in Section 5 of GSOP ... This statement is invalid as a result of anomaly COM-16 in that it is possible to have both ORBWFLAG and RENDWFLAG set equal to one, which could result in incorrect W-matrix extrapolation during P00.  [Editor's note:  The underlining is mine; I've added it, because it essentially reiterates the contents of COM-16, of which we do not otherwise have a copy.]
01/20/70
N. Brodeur, P. Rye
COM-33
Comanche 72 rev 3
In KALCMANU STEERING log section, there is a call to subroutine ZEROEROR which is uninhinted thus allowing an interrupt (DAP) to take place in the middle of the zeroing sequence.
05/08/70
Barnert
A-5
Comanche, Artemis
Insert check for coarse align before attempting gyro torquing
08/12/70
Sumner Rosenberg
A-14
Artemis
Set a list of labels = to each location that is in the downlink lists ...
08/12/70
Sumner Rosenberg
A-15
Artemis
Put a list in the downlink log section, using the new instruction "CHECK=" ...
11/05/70
N. Brodeur
A-22
Artemis
Append a (+/-) to relative addresses ...

SKYLARK (SKYLAB) Memos, PCRs, and PCNs

SKYLARK, if you'll recall, is the AGC software that replaced COLOSSUS (and was adapted from it) in the command modules used for the Apollo-Skylab and Apollo-Soyuz missions.  We have the text of a few of the Program Change Requests (PCRs), though unfortunately as of yet, none of the Program Change Notices (PCNs), and just one of the Memos.  The table of PCRs and PCNs below mostly comes from Appendix A of Section 2 of the SKYLARK GSOP.  (Even so, the GSOP does not list all PCRs and PCNs, and is only current through March 1972.)

It's interesting to note that many of the changes listed in the PCRs are simply deletions of lunar code that would be unnecessary for a CM-to-Skylab mission.  I think that a "normal" software-developer perspective on this would be that deletion of the working code, even if the code itself is unnecessary, represents more of a risk in terms of creating undetected breakage than simply leaving the code in place and not using it would be.  However, in working with higher-reliability code — disclaimer: my only familiarity with such matters is in working with airborne code in the U.S., which is currently governed by a document called RTCA DO-178C, and thus I don't really know what they thought about it in 1970 in the space biz — there is a concept of "dead code", i.e., code that is never executed under the software requirements, and specifically never tested; the dead code must be completely removed from software beyond the absolute lowest level of criticality.  The theory behind this is that if somehow that dead code actually did manage to be executed for some reason, then the result would be bad.  I imagine that's the theory behind the removal in SKYLARK as well: i.e., the risk of executing bad code is worse than the risk of undetected breakage.  On the other hand, I suppose the removal could be just a matter of trying to reduce the cost, by physically removing a handful of ferrite memory cores and their associated wiring.  I wonder what the actual cost tradeoff would have been between lifting those cores into space vs all of the development and testing time associated with the removal?

I presume that the terms "SKYLARK Memo" and "SKYLAB Memo" are synonymous, but we don't really have enough of them to draw any conclusions on the matter.

Memo, PCR, or PCN #
Written
Approved
Author
Scope
Subject
SKYLARK Memo (unnumbered)
10/9/70 n/a
William M. Robertson
n/a
Summary of Program Change Requests Involving Astrodynamic
Coordinate Systems, Ephemerides and Orientations, etc.
PCR SL003
2/25/70
1/28/71
R. O. Nobles
Code and GSOP
Improved short-burn logic to desensitize with respect to variations in the SPS engine.
PCR SL004
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of unneeded verb 94 (cislunar tracking).
PCR SL005
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of unneeded verb 59 (optics calibration mark).
PCR SL006
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of unneeded verb 52 (offset landing site mark).
PCR SL007
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of unneeded verbs 44 and 45 (set and reset of surface flag).
PCR SL008
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of unneeded routine 57 (optics calibration routine).
PCR SL009
3/3/70
1/28/71
S. A. Gorman
GSOP only
Deletion of unneeded routine 33 (CMC-LGC clock synchronization).
PCR SL010
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of unneeded routine 05 (S-band antenna routine) and verb 64.
PCR SL011
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of unneeded programs 72-76.
PCR SL012
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of unneeded programs 65 (up control) and 66 (ballistic).
PCR SL013
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of unneeded option 4 (lunar surface alignment) from programs 52 and 54.
PCR SL014
?
?
?
Code and GSOP
Program 39 deletion.
PCR SL015
?
?
?
Code and GSOP
Program 38 deletion
PCR SL016
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of unneeded program 37 (return-to-earth).
PCR SL017
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of unneeded program 23 (cislunar midcourse navigation).
PCR SL018
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of unneeded program 22 (orbital navigation).
PCR SL019
?
?
?
Code and GSOP
Program 24 deletion.
PCR SL021
3/3/70
1/28/71
S. A. Gorman
Code and GSOP
Deletion of program 32 (CSI) due to development of new targeting procedures (probably PCR SL030 below).
PCR SL022
2/26/70
1/28/71
Bedford F. Cockrell
Code and GSOP
Change of a constant to desensitize with respect to gravitational perturbation by the moon.
PCR SL025
2/26/70
1/28/71
Bedford F. Cockrell
Code and GSOP
Extend VHF range beyond limit of 327.67 nautical miles.
PCR SL030
2/27/70
1/28/71
R. R. Regelbrugge
Code and GSOP
Addition of NCC maneuver computation capability.
PCR SL032
6/10/70
1/28/71
M. C. Contella
Code and GSOP
Incorporation of smoothing filter for VHF range rate computation and display.
PCR SL033
7/29/70
1/28/71
Bedford F. Cockrell
Code and GSOP
Use of fixed coordinate system to avoid mission-by-mission coordinate-system changes.
SKYLAB Memo 3-70
7/29/70
n/a
William M. Robertson
n/a
Detailed software-design data regarding PCR SL033.
PCR SL035
7/7/70
1/28/71
S. G. Bales
Code and GSOP
Addition of TEPHEM to telemetry downlist.
PCR SL036
7/9/70
1/28/71
C. B. Parker
Code and GSOP
New (backup) method of specifying attitude data in case of star tracker failure.
SKYLARK Memo 27
4/20/71
n/a
William Robertson
n/a
Limitations in the Astrodynamic Orientation and Ephemeris Routines
PCR SL040
?
?
?
?
Skylab digital autopilot
PCR SL042
?
?
?
?
Skylab four maneuver DKI sequence
PCR SL048
?
?
?
?
Conversion of RCS DAP phase plane fixed memory constants of erasable load.
PCR SL051 REV 1
?
?
?
Code and GSOP
Skylark downlist changes
PCR SL400
?
?
?
Code and GSOP
Program 15 deletion
PCR SL402
?
?
?
Code and GSOP
Eliminate 481 day TEPHEM limitation in Lunar-Solar ephemerides routine
PCR SL405
?
?
?
?
Transform optics angles to tracking angles.
PCN SL409
?
?
?
Code and GSOP
Modification to PCR SL022
PCN SL410
?
?
?
Code and GSOP
Delete Lunar capability
PCN SL411
?
?
?
Code and GSOP
Delete HAM targetting program
PCN SL412
?
?
?
Code and GSOP
Delete ECSTEER
PCR SL413
?
?
?
?
ATM orientation determination program (P50)
PCR SL414
?
?
?
?
Docked alignment capability in P51
PCR SL415
?
?
?
?
Docked alignment capability in P52
PCR SL416
?
?
?
Code and GSOP
Add gyro trim to R50
PCN SL417
?
?
?
Code and GSOP
Deletion of 9 dimensional capability
PCN SL422
?
?
?
Code and GSOP
Initialize rendezvous navigation to update the CSM state vector
PCR SL423
?
?
?
Code and GSOP
Change conic to precision integration in all rendezvous targetting programs.
PCR SL424
?
?
?
Code and GSOP
Improve minkey gyro torquing logic
PCR SL428
?
?
?
?
Modification of Skylark Memo #14: Preliminary Skylab Rendezvous Targeting Plan for the Skylab GSOP
PCR SL431
?
?
?
?
R04 roll preference specification
PCR SL434
?
?
?
Code and GSOP
Correct αATM in P50.
PCN SL435
?
?
?
Code and GSOP
Do not automatically take VHF in P20
PCN SL436
?
?
?
Code and GSOP
Nominal use of ATM sources in P52 and P54.
PCN SL438
?
?
?
Code and GSOP
Incorrect star tracker angle in P55.
PCR SL439 REV 1
?
?
?
Code and GSOP
VHF range rate filter enable/disable by extended verb.
PCN SL442
?
?
?
Code and GSOP
Modification to R22
PCR SL448
?
?
?
?
Modification no. 4 to Skylark memo no. 14
PCR SL449
?
?
?
?
Forced firings for docked DAP auto maneuvers
PCR SL452
?
?
?
?
Precision integration for V90
PCR SL454
?
?
?
?
Docked DAP alarm codes
PCN SL455
?
?
?
Code and GSOP
Change to P35, P36 and R00 to fix anomaly ART 07
PCN SL456
?
?
?
Code and GSOP
Zeroing HOLDFLAG
PCR SL459
?
?
?
?
VHFR changes
PCR SL464
?
?
?
Code and GSOP
Set NN = 0 in P35
PCN SL467
?
?
?
Code and GSOP
Change VHFTIME to MARKTIME on the powered downlist.

SCB Meeting Notes

The Software Control Board (or perhaps Software Change Board, or perhaps Software Configuration Board, or even Software Configuration Control Board ... I'm not really sure, but does it really make a difference?) meetings were meetings held between the MIT Instrumentation Lab and the Manned Spacecraft Center, and I presume other parties as needed, to approve or disapprove PCRs (Program Change Requests) and PCNs (Program Change Notices), as well as to report the closure of such items.  As such, they can serve (for our purposes) to fill in gaps in LUMINARY Memo or COLOSSUS Memo series in order to track AGC revision-to-revision changes.  We don't have many of these, but Don Eyles has given us a few in order to help understand some of the changes in Luminary 131 for Apollo 13 that weren't tracked by the LUMINARY Memos.

Software Development Plans

Miscellaneous AGC/DSKY Problems and Changes

Various sections above cover problem and change reports for a variety of specific areas of implementation or responsibility (LUMINARY, SKYLARK, SCB resolution, etc.).  Reports that don't obviously fit into any of those areas of specification are collected in this section.

AGC/DSKY Inventory

In this section, we collect documents whose primary interest for us is that they discuss the disposition of specific AGC/DSKY units, and/or refer to them or their constituent modules specifically in terms of their part numbers and serial numbers.  In other words, anything that allows us to discuss what AGC/DSKY units or their constituent parts (like software) were used for what purposes.  There are other documents which also contain such information but which were cataloged before this specific category of documents was invented, so it may take a while before all such information is linked here.

Apollo Experience Reports

Miscellaneous Guidance & Navigation

These items are alphabetical by author, though the "author" is sometimes an organization when no individual authors are listed.

The document was prepared while I was working for Al Hopkins and Ray Alonso at the Instrumentation Laboratory and describes the analysis of the crux of a proposed backup system if the AGC became overloaded during the LEM trajectory.  Although the backup method described was never used, the document shows the type of analysis that went on "behind the scenes" in support of the entire mission.

Miscellaneous Microformed Documents

Note:  The document scans listed in this section are now obsolete for most practical purposes, because far better scans of the documents have since been provided.  Simply use the engineering-drawing search engine to find the "good" scans for most of them.  (Document MH01-01380-216 is not in the search engine, but can be found by rummaging through the unindexed scans of North American Aviation Interface Revision Notices.)  The material in this section (specifically, the inferior scans) has been retained anyway, but should be regarded as a last resort for trying to resolve legibility problems.  I have not changed the explanations accompanying the document links below, even though they do not fully reflect the current situation.  The explanations, however, do contain valuable information about how to interpret the "good" scans as well as the "bad" ones.  Besides the documents listed in this section, many other documents of a similar nature exist among the engineering-drawing scans, principally though not exclusively in "aperture card" Box 431, Box 433, Box 434, Box 435, and Box 436.  You are invited to browse the indices of those boxes and index-pages of all other aperture-card boxes for documents of interest that don't appear elsewhere in this document-library page.  However, your searches for such documents will generally be assisted greatly by knowing the desired document number.

This is an unusual section, in that it categorizes documents according where they came from and the technique used to digitize them, rather than the contents of the documents as such.  They are collected here, with an apology (in the old sense of the term) that I'm giving once (here!) because I don't care to repeat it over and over again.

In brief, a number of documents were encountered at NARA Southwest that had been converted to "microform" that were deemed significant enough to reproduce for you, but for which I personally have chosen an inferior method of digitization, due to limitations of time and money.  I will say that it's better having these scans than not, in lieu of having better ones, but there's no doubt that their quality is shockingly poor.  They are mostly, but not entirely, legible.  With effort.   Perhaps it's worth noting that all of the scans in this section are expected to be replaced by much, much higher-quality scans, probably before the end of 2021. 

A fuller explanation of these microform "aperture cards" can be found on our "Documentation Quest!" page, but as a brief example, imagine a 400-page document on aperture cards.  At current prices, NARA would be willing to digitize it for you for $1600, or you could go to the facility personally and make a relatively high-quality scan using NARA's equipment for about $160 (plus 12 hours of your own time), or you could go there and make a low-quality scan for free with your own flatbed scanner for $0 (plus 3 hours of your own time).  Now, I have scanned many, many engineering drawings from NARA aperture cards using the mid-price option, because it's reasonably cost-effective to do so, and you can see those on the MIT/IL engineering-drawing index page.  But for longer documents, for obvious reasons, I chose the free option.

Aperture cards hold photographic negatives, and the document scans I've made from them are presented as-is.  I.e., as negatives.  They could be easily converted to positives and post-processed with brightness and contrast adjustments that would make them easier to read, but I've chosen not to do so in most cases, because I preferred to get the scans into public view rather than hold onto them for however long it would take to work out the perfect post-processing for them.  Plus, most such post-processing results in image rot that I prefer not to incur at this stage.  The fact that I've not done this post-processing means that these scans will be perceived as being of even lower quality than they actually are.  Perhaps you can figure out the perfect adjustments for me, and let me know how to do it the best way!  But there are also true quality issues, in which portions of some scans appear blurry and out of focus, which I presently don't understand.  Perhaps some pages will require rescanning in the future for legibility reasons.

Another fun feature of these documents is that rather than containing a nice, contiguous sequence of pages, we instead provide all (or all available) revisions of the document, one after the other:  rev "-", followed by rev "A", followed by rev "B", and so on.  Consequently, the sequence of pages will often have holes and duplications, though hopefully one could form a complete final-revision document from all of the pages if one were so inclined.  If you are so inclined, I'd be happy to accept such a version from you.

Finally, since these documents are being provided only in their "raw" form, I've not attempted to turn them into nice, tidy PDFs, so at the moment, you can see these scans only in their raw forms at our Internet Archive site.

All right, enough of the apology!  Here, finally, is a list of the actual documents: