Spacelog Apollo 8

We deleted them.

Apollo 8, Houston.

Go ahead, Houston.

Roger. Frank, I would like to talk to you for a minute or two about the AUTO OPTICS funnies that you have been seeing throughout the mission. Over.

Go ahead.

Roger. The problems you have run into so far are due to some unknown source, probably EMI or the like loading your CMC trunnion cell which is now 91, so it doesn't really represent your true trunnion angle. Now this loading problem we don't feel implies any decrease in the reliability in your CMC at all. We think that the best way to circumvent the problem is to cycle the OPTICS ZERO switch first to OFF and then ON prior to using the optics for any purpose. And with that procedure, I think you probably won't have any more problems. Over.

Roger, Jerry. Understand. I do notice one difference. We did preferred REFSMMAT's. The first we had trouble with; the last one worked out as expected. I noticed for the first one that when the option came up, it was for nominal option, whereas for the very same procedure for this last REFSMMAT change, we got … preferred REFSMMAT option. …

Apollo 8, this is Houston with a comeback on your entry navigation calculations. Over.

Go ahead.

Roger. We went through the charts and got exactly the same answer as you got. Looks like your procedure is very good; looks like it was real good head. You remembered to average out the velocity. We also went ahead and computed the problem to verify the chart and got a good solution. Over.

Roger.

Thank you very much.

You're welcome.

Now if we can get our state vectors to agree, we'll be in business.

Apollo 8, Houston.

Apollo 8, Houston.

Go ahead.

Roger, Frank. Is Jim listening?

Listening.

Roger. On your question about the option: PROGRAM 40 sets the preferred flag such that the next P52 will come up option 1, subsequent alignments after that come up option 2. Over.

Roger. Understand. So 40 will have to come up with a TIG burn with an option 1 for us.

Roger. Now concerning your restart that happened in lunar orbit, for the peace of mind of the computer people and the MIT folks, we have a question. Did VERB 34 ENTER to a flashing VERB 51 in P22 cause your restart? Over.

Yes. That sounds like it was it.

Roger. Thank you, Jim.

That must be a “no, no”.

Yes, Yes. That's a “no, no”.

That almost caused an unscheduled EVA, too.

Apollo 8, Houston. BIOMED switch center. Over.

Three, two, one -

MARK.

Apollo 8, Houston.

Go ahead.

Apollo 8, this is Houston. It is about time for us to start keeping track of some command module RCS temperatures; so when you get a chance, we'd like the reading now, and we'll try to repeat it about every 8 hours or so.

Okay. We'll get them for you right now.

Roger.

You want the motor off the test meter, right?

That's affirmative.

The 5C is pegged high.

Roger. 5C pegged high.

5D is pegged high.

Roger. D, high.

So's 5D. 6A is high; 6B is high; 6C is 5 volts; 6D is pegged high.

Apollo 8, Houston. Roger. Understand. 5C and 5D are pegged high; 6A and 6D are pegged high; 6 Charlie is 5 volts; and 6 Delta pegged high. Over.

Apollo 8, Houston.

Roger. I'm only reading 121 on quad A.

Roger.

Quad C is the highest temperature we have; it's 142.

Roger, Frank. We are more interested in the tank temperatures than the quad temperatures. Over.

Roger. I understand. Now listen, if you think it is that important, we'll just keep PTC-ing it and not even do anything.

Negative. There's no sweat right now. We're watching it, and we just wanted to let you know that this thing is being looked at. If we get anywhere near a situation where we feel we ought to change, we'll go back to PTC or cool it.

Okay. Thank you. We'll do our best, but it is kind of hard, though. You are sort of subject of spatial geometry: wherever the stars and the moon happens to be, that's where you point.

Roger. We understand. We're going to keep an eye on it down here, and we'll keep you appraised.

Apollo 8, Houston.

Go ahead, Houston. Apollo 8.

Roger. Pass the word to Jim that on these marks that are coming up, pretty important that he remember to record his DELTA-R and DELTA-V and trunnion. We are working low bit rate down here, and so we're not going to be able to record that data from here. Over.

We are recording them all.

Houston, Apollo 8. Did you read that we are recording all the DELTA-R and DELTA-V and trunnion …

Jerry, Apollo 8.

Roger. Go ahead.

As luck would have it, we got the sun almost directly ahead on top of us here.

Roger. We understand, but tank temperature is holding steady, so we are all right.

Apollo 8, Houston. Over.

Go ahead, Houston. Apollo 8.

Roger, Frank. The helium tank temperature that we are watching on quad A has only gone up 1 degree in all this work that you are doing, so we don't consider it to be too terribly serious. What we would like to do, as soon as you finish this P23 work, is rather than go back into PTC, let's just roll her over 180 degrees and put quad A on the cool side, and hold it that way until your next activity comes up, which is around 102:30. Over.

Okay, Jerry. We're through with PROGRAM 23. We're just going to roll here to get the sun off quad A, if that's what you want.

It should be getting cool now, Jerry.

Roger, Frank. So far we haven't seen the temperature start back down again. We expect to see it, though.

Houston, Apollo 8.

Apollo 8, Houston. Go.

Roger. Give us the word if you want us to maneuver back here before that time that you …, please.

Wilco.

Apollo 8, Houston.

Go ahead, Houston.

Roger, Frank. We have some data that was missed on your P23. We'd like you to read it down to us if you have time.

Roger. We will in just a minute.

Roger.

Go ahead. What do you want?

Roger. On star number 2, the sixth mark, we missed DELTA-R and DELTA-V.

Sixth mark, that's—did Lovell tell you to do this? Come on, Carr; come clean. Did he ask you to ask for this?

Who?

Jim Lovell.

Negative. Uh-uh. We really missed it.

It's all zeros, and all zeros.

Roger. All zeros, all zeros. Okay. On star number 7, we missed the trunnion on marks 1, 2, and 3.

On 1, trunnion was 03235; on 2, it was 03240; on 3, it was 03241.

Okay, Frank. And then the last one is on star number 1; we missed the trunnion on mark 5.

04064.