A lot of work is going into the subject contingency – with respect to:…
Category: Transearth coast
LGC computer requirements to provide DPS backup of SPS
During our discussion at MIT last week, the question came up as to whether it is necessary to have trajectory integration techniques in the LCG for the trans-earth phase of the mission as well as the lunar phase. The argument is that if we are serious about using the LM descent propulsion system to back…
Transearth midcourse maneuvers are getting easier and cheaper all the time
On June 6 we had a Transearth Midcourse Maneuver Mission Techniques meeting at which we discussed implementation of the philosophy as described in my June 3 memo. The technique proposed, you recall, involves making a number of small RCS burns using the SCS, solely for the purpose of corridor control. I have discussed this with…
Apollo Spacecraft Software Configuration Control Board meeting number 32
On October 9 Chris Kraft convened the first Software Configuration Board meeting since June 5 at MIT. We had a real pot full of PCR’s to discuss, some of which were approved for Apollo 13, some for 14, and some were put in a category in which MIT was to continue development to a point…
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…
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….
Transearth Spacecraft Navigation
During Jim McPherson’s Transearth Spacecraft Navigation Mission Techniques meeting of October 8 and 15, a potpourri of ground rules, working agreements and constraints was established. I may be duplicating other reports with this memo but figure better too many reports than not enough. All of the following apply specifically to the first batch of sextant…
Data Priority meetings schedule
In order to get a little bit more orderly in our conduct of the Trajectory Control Data Priority business, it’s evident that we must schedule meetings on a pre-established, periodic basis. Accordingly, the Ascent and Descent meetings will take place on alternate Tuesday afternoons; Rendezvous meetings will be held of Wednesdays, one mission in the…
Spacecraft computer program orbital integration
This is just another little golden nugget for your files….
Apollo spacecraft guidance navigation modes currently planned for AS-503 and AS-504
I am afraid there is a bit of confusion as to what navigation modes are being provided in the AS-503 and AS-504 Apollo spacecraft computer programs. I am sure I have contributed to this confusion myself, and the purpose of this memorandum is to try and clear it all up….