For the past several months there has been considerable discussion regarding the question of whether we should perform the lunar orbit insertion (LOI) maneuver as a single burn or if it should be made in two steps. This is an important matter to resolve since it has impact on RTCC program development, guidance systems targeting,…
Category: C’
External Delta V for LOI
In a December 15 memo (67-PA-T-121A), I indicated that we were going to perform LOI using two maneuvers. I also stated that pending results of some studies then underway we expected to use the External Delta V guidance mode for these maneuvers rather than Lambert steering. The primary reason for doing this was to make…
Reentry from lunar missions
On January 12 a group of Flight Crew, Flight Control and Mission Planning guys got together to talk about the lunar reentry and some rather interesting things came out which I am recording here for my records and your amusement….
Recommendation to retain the Two-Stage Lunar Orbit Insertion (LOI) Maneuver
This memorandum documents the results of our review of the two-stage LOI maneuver which you requested as a result of a recent OMSF suggestion that it might be preferable to return to a single burn plan. Participation in this review involved all operational elements of MSC concerned in this matter. The conclusions are unanimous….
C’ Transearth Midcourse Correction (MCC) and Entry Mission Techniques
On September 13, we conducted a review of the Transearth MCC and Entry Mission Techniques for a lunar mission. Although, originally developed for an F or G type mission, the discussion was almost completely devoted to C’. Participation included all interested MSC organizations (including the C’ flight crew) as well as representatives from North American,…
Review of the Mission Techniques for Saturn V/Apollo Launch Phase Aborts
This memo is to backup our phone call notifying you of the review of the Saturn V/Apollo Launch Phase Abort Mission Techniques Document to be held Thursday, October 3, 1968, at 1:00 p.m. in Building 4, Room 383. At that meeting we will thoroughly discuss the attached draft of that document, as it applies to…
C’ Communication Loss
A lot of work is going into the subject contingency – with respect to:…
C’ Mission Techniques
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…
Lunar orbit revolution counter for C’
This may seem like a trivial matter – however, before any confusion arises let’s firmly establish the means of identifying revolutions in lunar orbit by number. Specifically, unless there’s some good reason for choosing another way:…
Cis-lunar spacecraft navigation for C’
We are still thrashing around trying to figure out what to do with regard to cis-lunar spacecraft navigation for the C’ mission. It is not clear whether a couple of things are really necessary or not. If we could get rid of them, it would simplify things. Unfortunately, we aren’t confident it is safe to…