Spacelog Apollo 8

Wilco.

Say again.

Apollo 8, this is Houston. I hadn't said anything at that time. We're digging some angles out for you now. In reference to your earlier question about the sleep cycle juggling and so forth: we agree with your comment. We would like to get back on the flight plan as far as the sleep cycles and so forth are concerned by the time we get into lunar orbit. So we'd like for you to use your own judgment about the most efficient way to accommodate the sleep cycles and proportion it up among yourselves. We would like to have you keep us informed of who's doing what and what your plans are. We have the one P23 that we had slipped 2 hours. We'd like to get the other one in. We can also adjust the time for the other P23, if it's going to conflict—I guess that's two more P23's. We can adjust the time for those if you'll let us know what your forecast is for when Jim will be available to take some sightings. So the big message is that we'd like to work around whatever your desires are. If you'll let us know, we'll pick some stars and some angles and have them ready for you.

Okay, Houston. The CMP will be up at 36 hours. The LMP is going to sleep now, and he'll sleep through until 40 and then I'll stagger that in and try to go to sleep around 30 to 37 so that by the time we get to day 3 we'll all be back on the same direct sleep cycle.

Okay, real fine. Thank you.

Apollo 8, Houston. REACQ angles look like minus 45 in pitch, plus 90 in yaw, and 34 23 for the time.

Roger. Copy. This is good using REACQ because it keeps the caution and warning from going off again.

Roger. I understand that. Are you leaving the high-gain antenna on after it swings over to the reset position?

Do you have any reason for us to use the high-gain antenna?

EECOM, do you think we need that, really, very much?

Standby.

Why can we just not use the high-gain antenna for a while? Getting high bit rate on the OMNI's. Okay, let's tell them that we'll just not worry about the OMNI for a while.

Houston, this is the LMP. Before I hit the sack, could you give me a rundown on our systems the way you see them?

Okay, we'll put that together for you and we were just talking about the redundant ECS components check and we were going to put that off until everybody's had a chance to get some sleep. Trying to keep you from having going to the left-hand couch.

Oh, that would be nice. I sent Lovell under the couch, though. I've got one man sleeping under the left couch here—right couch and one man sleeping on our right couch.

Okay. I understand you've got one under and one on the right couch.

Roger. That's affirmed.

Okay. And in reference to the OMNI versus the high gain, it looks like we can live with the OMNI antennas here for several more hours, if you would like to delete the use of the high gain.

Okay. Goodnight, Houston.

Okay. Before you pitch your eyeballs there, we'd like to terminate the battery charge.

I knew you guys would get me.

Got you.

Okay. The battery A charge is terminated at 37.3 volts.

Okay. Thank you.

Standing by for your systems status.

Okay. We're pulling that together now.

How are the PU valve and SPS line temps looking?

Okay, I'll test that.

Systems look okay to you Houston?

Okay, Apollo 8. All the systems—giving a quick look around the room—look real fine. You've got an RCS quad update on the quantity, so you have that information. The SPS oxidizer feed-line temperature and the fuel temperature are both at 73 degrees. The cryo profile is running right on the line: Battery A—our calculations have 39.63 amp hours. Battery B, 37.94, and battery Charlie, 38.46. The COMM continues to be running ahead of predictions in quality and circuit margins. Everything else looks like it's real fine.

Roger. Do you expect to have a low bit rate voice on the DSE off the OMNI's at lunar distances?

That's negative on DSE off the OMNI's. Not looking forward to that much improvement.

Roger. We need about a 30-foot dish, I figure, for that on the spacecraft.

Roger. It runs up the fuel required for PTC, though, Bill.

Apollo 8, Houston.

Go ahead, Houston, Apollo 8.

Okay. I know you're trying to be quiet, so I'll just read up some information to you. One of the things that we just turned up that might give you some confidence, if you lose oxygen cryo tank now: you have 80 pounds remaining now at CM/SM SEP. The limiting factor on single tank operation right now is the hydrogen tank which has a positive margin at CM/SM SEP, assuming our standard profile gives you about 143 hours. So it looks like you are over the hill on those. Notice that you're flying in the rate 2 position for you BMAGS which is fine. Only make sure that you still were maintaining a PTC attitude. Looks like you're pretty close to it.

Roger. We are flying PTC, and I was wondering why it was going out of the deadband; now I know. Thank you.

Okay. Thank you.

That's what happens when you let Anders fly. He's asleep so he can't defend himself.