On February 27 we held a Mission Techniques meeting which I thought was going to simply edit the “final” version of the Lunar Surface Document prior to its release. To my chagrin we discovered that there are at least two areas requiring much more thought and analysis. We will probably meet again to resolve these…
Year: 1969
Simplification to the pre-PDI abort procedure
As a result of a passing comment in one of my previous notes, Tommy Gibson and George Cherry looked into what it would take to provide automatic PGNCS targeting for LM aborts at initiation of powered descent (PDI). They found the capability already exists in the LUMINARY program. How’s that for great!…
Happiness is having plenty of hydrogen
As I understand it, there has been a desire or requirement to have the capability of surviving a cryo-tank failure at any time in the lunar mission. After C’, it was decided to keep the IMU powered up throughout all lunar missions even though it might be at the cost of having the backup cryos….
F mission lunar orbit attitude sequence
This belated memo is to describe the results of our March 10 Mission Techniques meeting on the F mission lunar orbit attitude sequences as well as I can remember them….
Lunar Landing Guidance and Control Modes
Gentlemen:…
PGNCS operations while on the lunar surface
During our March 27 Lunar Surface Mission Techniques meeting I think we finally settled how we think the PGNCS should be operated. How many times have I said that before? This memo is to broadcast a few new items that might be of general interest….
Some G Mission Techniques action items
This memo is just a list of action items assigned to MPAD and/or MIT which I remember coming from our recent G descent/descent abort meetings. In addition to reminding those responsible for them, they serve as some sort of indication of what’s going on in this business which you might find interesting….
RLS Determination
On April 2 we had a Mission Techniques meeting to discuss how we should handle the determination of the LMs position on the lunar surface (RLS). Specifically, we were concerned with how to determine its values and, after improved values are determined, when they should be loaded into the spacecraft computer. One obvious conclusion, if…
AGS alignments in lunar orbit and operations on the lunar surface
On April 2 we finally got around to establishing how to operate the AGS on the lunar landing mission. The two basic subjects for discussion were how to handle CDU transient problems when aligning the AGS to the PGNCS in lunar orbit and how to operate the AGS in total while on the lunar surface….
Some things about Ascent from the moon
On April 3 we had an Ascent Mission Techniques meeting – the first in a long time. This memo is mostly to express some rather general observations….