See list attachedSeptember 4, 196969-PA-T-117APA/Chief, Apollo Data Priority CoordinationNotice 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.
Following is a list of some things I know people would like to cover. Perhaps it can be used as an agenda:
1. LOI – Target for circular CSM orbit at DOI or CDH?
a. Shopping list of descent trajectory and guidance changes to improve DPS propellant margins.
b. Effect of altitude dispersions at PDI on descent trajectory, ΔV, throttle control, etc.
c. Selection of landing site targeting (do we aim for 1,000 ft E/500 ft N?)
d. Docked alignment and sun check status.
e. DOI face up for AGS compatibility.
f. DOI residual trimming rules
g. Preferred LM attitude hole mode to be used in coasting flight before and after DOI
h. AOT pre-PDI landmark observation – deletion of
i. LR test (R04 or R77) and how data is to be used
j. Use of ΔRLS – i.e., when and based on what data source (Lear, MSFN ranging, etc.)
k. Rules governing use of landing radar
l. Use of DPS low level indication (was it early on Apollo 11)
3. Lunar surface
a. RLS determination after touchdown
b. Surface alignment and drift check techniques
(1) Effect of powering down
(2) AGS azimuth
(3) AGS gyro calibration with high inclination
c. CSM plane change scheduling
a. Insertion targeting to give near zero CDH
b. MSFN coverage
c. Criteria for H vs Ḣ switchover lines
a. Post-insertion alignment – deletion of
b. Navigation tracking schedule and initialization ground rules
c. Use of AGS in place of the manual charts
d. Rendezvous maneuver voting logic
a. Plane change for photographic objectives
(1) trim requirements
(2) burn monitoring
b. TEI (with LM attached?)
a. Entry guidance changes and effect on target range
b. EMS with reverse bank or not
a. SIVB Evasive Procedure
(1) Intermediate throttle up on docked DPS burns
(2) Docked APS burns
(3) 15 minutes SPS abort – deletion of
(1) Direct return vs TPI with AGS
(2) Targeting with ΔVz = 0
d. Descent abort coefficient updating and/or use of tweak burns.
e. PDI + 10 to PDI + 15 LUMINARY change vs phasing
f. T₂ phasing maneuver
g. Review of manual ascent status
h. Need for “Collins Cookbook” of abort rendezvous
i. Direct ascent rendezvous plan for LM water problem
j. Docked DPS burn for contingency photographic mission
The fun starts at 9 a.m. in Room 378 of Building 4, probably with a review of interesting Apollo 11 anomalies.