OK, just completed MCC-2. The RTCC document you pointed out has been very helpful. A few questions:
It looks like I can generate a state vector from either the Project Apollo MFD or the RTCC MFD. Is one better than the other?
For Apollo 15 I would use the RTCC MFD. The AGC uses a yearly changing coordinate system (only changes very slightly, one year worth of Earth precession). And the PAMFD being the much older MFD can only uplink state vectors for the coordinate system used by Apollo 7 to 10. The difference isn't larger, although Apollo 15 is already 3 years later, so the differences might already be somewhat noticable.
Where can I find the criteria for deciding when to scrub a MCC?
The mission rules document. The criteria I have been using for the MCC scenarios are basically this:
"LOI shall be targeted within these constraints:
A. The pericynthion of the approach hyperbola will be maintained within +/- 10 NM of HP target
B. The altitude of the node (between approach hyperbola and the desired LPO) will be maintained between -10 and +15 NM of HP target"
I find it easier to judge it by the DV of the calculated maneuvers. Unless it is 10 ft/s or even larger I would skip MCC-3. Doing MCC-4 is good for entering the desired lunar orbit precisely, so unless it is less than 1 ft/s or so I would always do it.
How do I determine when ullage is necessary? How do I choose between two or four jets?
The CSM burn schedule has ullage requirements:
https://history.nasa.gov/afj/ap15fj/fplan/2-012.gif I'm actually not sure about 2 vs. 4 jets. Maybe if the CSM is very light you would rather use 2 jets to have a longer time for the propellants to settle but not such a large DV from it?
Finally, help me understand the SPS vs RCS Criteria chart in the G&C Checklist (Page 5-11 4-jet ullage as an example). If my CSM/LM weighs 98,000 lbs and I need to make a 4.0 fps burn, does the chart indicate a SPS burn with 4 sec ullage?
The ullage duration is just a function of total spacecraft weight, not the DV. If the propellant tanks are nearly full you aren't doing an ullage burn at all, that's why that curve is at zero for 82,000 lbs and above. The SPS vs. RCS criteria is basically a 0.5 second SPS burn. You want to use the SPS if you can, but don't want a burn shorter than 0.5 seconds. So that's basically what that curve is that is labeled "V_g". For 98,000 lbs it has 3 ft/s. So if the burn is more than 3 ft/s you use the SPS, otherwise RCS.