Attached are a list of ground rules and working agreements I compiled from my notes taken at the September 13 and 14 Mission Techniques meetings and the September 20 Lunar Abort meeting, all on the C’ mission. This list is far from complete. Basically, these items are only the changes and additions to the material…
Category: Mission phases
Propulsion system to be used on the “D” Mission Rendezvous CSI Maneuver
One of the planned rendezvous maneuvers (CSI₁) on the “D” mission is nominally zero. Since it is intended to make this maneuver based on the real time situation, some logic must be established to govern when and how the maneuver would be made. This memo is to describe the proposed logic….
D Rendezvous Mission Techniques Meeting – September 9, 1968
On September 9, we had another D Rendezvous Mission Techniques meeting. Basically what we did there was to discuss the new, simplified rendezvous mission plan and its effect on the work we have done so far. Based on this discussion, I am revising the ground rules and working agreements and will send them out within…
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At the June 14 “D” Rendezvous Mission Techniques meeting, I unofficially (I guess) assigned at action item to your people who were there. Specifically, we asked for MIT’s recommended procedure for adjusting the W-matrix during rendezvous navigation in both the LGC and CMC. As a matter of fact, I understand that your people intend to…
Lunar landing lighting constraint change
I have been delinquent and I apologize for not sending this note around sooner. About a month ago I learned in a discussion with Joe Loftus that it is his recommendation, apparently based on considerable analysis and review, that the acceptable sun-angle-at-lunar-landing boundaries should be revised. As I understand it, the old sun elevation angle…
Reentry guidance is perfect for S/C 101 regardless of L/D
This memorandum is in response to your question regarding the reentry guidance with low L/D. It was erroneously reported to you in the August 3 MPAD Weekly Activity Report that, although the program could be modified easily to handle L/D as low as 0.2, it probably would not be implemented for Spacecraft 101. Actually, some…
Odds and ends about lunar landmark tracking
This memo is just to pass on some numbers which I found interesting when reviewing the lunar landmark orbit determination procedures. It is not intended as an argument “for” or “against” using landmark tracking by the command module for navigation….
Lunar lift off shall be planned at discrete times only.
During our December 21 Ascent Phase Data Priority meeting we concluded that a continuous launch window for lift off from the lunar surface is not a requirement. That is, all mission planning, procedures and program development associated with the nominal lunar landing mission should be based on the assumption that one or more discrete lift…
D Rendezvous Mission Techniques
This memo is to tell you about the results of the November 25 D Rendezvous Mission Techniques meeting. Except for a number of small clean up items, we spent most of our time talking about how to handle slippage of TPI time and incomplete Insertion and Phasing maneuvers. After an exhausting discussion, I think we…
Cis-lunar state vector updating procedure change
A lot of you won’t care – but I want to make sure that those that need to know, do. It deals with state vector updates from the MCC to the CSM during cis-lunar flight on the G mission….