As you know, the rendezvous orbit navigation process involves updating the spacecraft state vector based on the spacecraft radar data. However, the radar apparently has unacceptably large angular bias errors for some reason. Instead of fixing the damn radar, someone decided to include in the LEM spacecraft computer program the capability of computing these radar…
Category: Lunar orbit
Goodies affecting the RTCC gleaned from the 504 GSOP meeting
I am writing this memorandum to you in your position as RTCC program coordinator for MPAD. During the lunar landing GSOP review of August 16 and 17, I noted a number of items discussed which had some bearing on the RTCC program. I would sure appreciate it if you would look them over and see…
LM S-band antenna boresight change presents no LGC problem
This memo is in confirmation of our telephone conversation March 30, 1967 regarding LM S-band antenna acquisition. As you are aware, some months ago we reinstated to MIT the requirement for providing DSKY displays of pointing angles compatible with the astronaut’s S-band antenna controls to assist him in acquiring the MSFN while in lunar orbit….
F mission rule regarding DPS gimbal drive failure indication
This memo is to report how it is currently planned to handle an indicated failure of the DPS gimbal drive actuator (GDA) on the F mission….
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….
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…
G Rendezvous Mission Techniques
If you can stand it, I would like to announce another change in the G mission lunar rendezvous timeline. In order to provide more tracking which will hopefully improve CSI targeting and to avoid bothersome real time variations of time between CSI and CDH which foul up the plane change scheduling, we propose:…
Some decisions regarding lunar landmark tracking on the F and G missions
We had an Ad Hoc Mission Techniques meeting on January 9 to talk over lunar landmark tracking. In particular, we wanted to discuss what we thought had been learned from the C’ mission and what we want to do on the F and G missions. This memo is to outline all that briefly. The specific…
July 9 and July 24 “G” Rendezvous Mission Techniques meetings
During the July 9 and July 24 “G” Rendezvous Mission Techniques meetings we have developed preliminary intra-vehicular rendezvous navigation sighting schedules. Crew work load estimates currently in use for the “D” mission rendezvous are included. These tracking schedules are very important since they have a predominating influence on almost everything else. For example, from these…
All about F APS burn to depletion and landmark tracking
On February 14 we had a Mission Techniques meeting to pin down F lunar orbital operations between the end of rendezvous and TEI. Aside from a rest period, this consists of two exercises – the APS burn to propellant depletion and landmark tracking with the optics. I think we have a good understanding of how…