Attached is my guess as to when we will distribute some more Mission Techniques Documents. Except for the G unique stuff, we’ll probably come pretty close to this schedule since it’s primarily just updating C’ books a little bit. It also gives you an idea of what we plan to do – if that’s a…
AGS Performance with no PGNCS Alignment During the Homann Transfer (Task 46)
There is some concern about the capability of the AGS to safely perform an abort from hover without a PGNCS alignment during the Hohmann transfer. This concern stems from the results of Monte Carlo analyses which indicate that the mean minus three sigma for perilune altitude of an AGS controlled abort from hover is less than 30,000 feet (the safe orbit limit), and from single error analyses which indicate that an initial misalignment slightly larger than three sigma results in an unsafe orbit……
PGNCS Alignment During Hohmann Transfer
The attached IOC presents an analysis which estimates the increase in the probability of an unsafe AGS abort if the PGNCS alignment during Hohmann transfer is not performed. The analysis shows that given that PGNCS fails, the probability of an unsafe AGS abort from hover is increased by less than 0.001……
“D” Rendezvous Mission Techniques meeting of July 22
We cleaned up a lot of stuff at the subject meeting. Attached are updated “Ground Rules, Working Agreements, and other things,” and another list of open items to be discussed at our next meeting currently scheduled for September 6, 1968, or whenever the crew is available after that….
“D” MISSION RENDEZVOUS NAVIGATION MISSION TECHNIQUES PANEL
Objectives of the panel are to establish the following rendezvous navigation mission techniques……
“D” RENDEZVOUS MISSION TECHNIQUES OPEN ITEM LIST
July 25, 1968…
Procedure for LM aborts immediately after landing are terrible!
Clarke Hackler of Guidance and Control Division uncovered a rather alarming situation which we’ve discussed a little at our Descent Abort Mission Techniques meetings. He briefly states the problem quite nicely in the attached memo, which I thought should be brought to your attention….
Results of the Apollo Spacecraft Software Configuration Control Board meeting of April 23
This memorandum briefly summarizes the results of the meeting and primarily points out which PCR’s were approved or disapproved….
Requirement for pre-PDI IMU alignment has been deleted
After extensive Mission Techniques Panel review, it has been established that a PGNCS IMU alignment immediately prior to Powered Descent is not required for any reason. It is, in fact, undesirable at this critical time in the mission when lighting conditions couldn’t be worse (local high noon!)…