This memorandum is in response to your question regarding the reentry guidance with low L/D. It was erroneously reported to you in the August 3 MPAD Weekly Activity Report that, although the program could be modified easily to handle L/D as low as 0.2, it probably would not be implemented for Spacecraft 101. Actually, some…
Category: Reentry
EMS will always be used on “C” if G&N fails
Mr. C. C. Kraft announced at his Monday morning meeting that the EMS will be used for controlling reentry on the “C” mission in the event of a G&N failure regardless of when that failure occurs. This was decided over his mild objection at George Low’s CCB meeting last week….
Is display of max g in P-61 any good?
During our lunar landing GSOP review someone commented that the display of max g in P-61 is of no use at all. It was said to be grossly in error for earth orbit reentry and of no value in determining appropriate action during entry from lunar return or following an abort when it is more…
Notice of a catch-all Apollo 12 Mission Techniques meeting
We have scheduled a Mission Techniques meeting on Monday, September 15, 1969, to go over the Apollo 12 flight for the “last” time. Although most of the discussion will probably deal with the landing and rendezvous phases, we would like to clean up all open items regardless of mission phase….
Apollo 205/101 reentry procedures
ASPO’s Systems Engineering Division wrote a memo outlining general procedures to be used by the Spacecraft 101 crew following a G&N controlled deorbit burn and also specifying that an automatic reentry would definitely not be performed. You forwarded that memo to me questioning whether our Data Priority Coordination group had looked into this subject and,…
Lunar Reentry Mission Techniques meeting – March 21
On March 21 a small group of us ???? ??????? the logical flow charts TRW produced based on our ??? Lunar Reentry Mission Techniques meeting a couple of weeks ago. A couple of things came up that I should probably pass around….
Small program change needed in the AS-501/502 AGC program
In the course of development of the AS-206 computer program at MIT, a coding error was discovered which was immediately recognized as being common to the AS-204 and AS-501/502 programs. It is a scaling error, if you know what that means, which imposes the operational constraint of not operating one of the integration programs (i.e.,…
New/old platform for AS-501
Cline Frasier told me today that the platform in Spacecraft 107 (that is, AS-501) has been replaced again by the one that was taken out several weeks ago. Apparently, there was an intermittent problem in one of the accelerometers. I believe Cline said they have replaced the Z-gyro. This change should be beneficial in terms…
Third Trajectory Control Data Priority Meeting for Spacecraft 101
At 9:00 a.m. on December 20, 1967, in Room 966, Building 2, there will be a Trajectory Control Data Priority meeting to review the detailed logical flow charts prepared at MSC defining the retrofire and reentry phase of the S/C 101 mission. Appropriate comments shall be incorporated and they will be reissued as configuration controlled…
F and G cis-lunar midcourse correction scheduling
This memo is to make sure everyone is aware that we are scheduling the final midcourse corrections before LOS and Entry differently than on C’….